The mass of NaCl that needs to dissolve in water to make 50 M NaCl solution with a final volume of 500 mL would be 1,462.5 grams
The molarity of a certain solution can be defined as the total number of moles of solute that are present in one liter of the solution. The molarity equation is the relationship between the moles of solute whose molarity is to be calculated and the volume of solvent used to dissolve the specified solute.
M = n ÷ V
Or
M = m ÷ (M × V)
Where:
M = the molality of the solution
n = the number of moles of the solute
V = the volume of solution
m = the molar mass of the solution
M = The molecular weight (NaCl molecular weight = 58.5 g/mol)
Thus, the molar mass of NaCl would be:
M = m : (MV)
50 M = m : (58.5 grams/mol x 0,5 L)
m = 50 x 58.5 x 0.5
m = 1,462.5 grams
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methyl acetate has a chemical composition of 48.64% carbon, 8.16% hydrogen, and 43.20% oxygen. what is the empirical formula?
8.16 g H is produced by 8.16% H, 48.64 g C by 48.64 g C, and 43.20 g O by 43.20% O. If necessary, divide these numbers by integers to produce whole numbers; if one of the numbers is altered, the others must be altered as well.The empirical formula of [tex]C3H6O2[/tex] is methyl acetate.
The chemical formula of methyl acetate is 48.64% carbon, 8.16% hydrogen, and 43.20% oxygen. The empirical formula is [tex]CH2O[/tex]. [tex]CH3N[/tex] empirical formula. [tex]C3H3O[/tex] is the empirical formula. Consider that we have 100 g of the material. We therefore have 29.0 g of oxygen, 5.5 g of hydrogen, and 65.5 g of carbon. [tex]C3H3O[/tex] is the empirical formula. A chemical having a mass of only 48.64% C and 8.16% H is composed entirely of carbon, hydrogen, and oxygen. The empirical formula for the chemical is what AI Recommended Reaction This substance's empirical formula is [tex]C2H6O2[/tex].
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state the names related to climate conditions for various crops and state their requirements. state the types of crops based on any of the factors.
Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature.
Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature. The following are some of the ideal circumstances for strong plant growth: Air temperature: 24 °C Day/ 19 °C Day (75F/65F) H2O temperature: cold at 26 °C, hot at 24 °C, not to exceed 25 °C. Minimum of 50 and no more than 70% relative humidity These fundamental resources for the food-producing industry, according to Perrin, include land, water, and other natural resources as well as important aspects like climate and ecological resilience. Environmental elements include air, water, soil, climate, native plants, and landforms. By definition, environmental factors have an impact on daily life and are a significant contributor to the disparities in health that exist between different geographic regions.
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give one function of iron in plants
Answer: Iron is necessary for photosynthesis because it facilitates the transfer of electrons and protons within the chloroplasts, which is required for the production of ATP, which is energy.
Explanation: Biology class helped a lot with this answer.
if i dilute 7000 ml to 8 m lithium acetate solution to a volume of 50000 ml what will the concentration of the solution be
The final concentration of the solution after dilution to 50000 ml will be 0.224 M.
To find the concentration of the solution after dilution, you can use the formula:
C1 * V1 = C2 * V2
Where C1 is the initial concentration of the solution, V1 is the initial volume, C2 is the final concentration of the solution after dilution, and V2 is the final volume after dilution.
In this case, C1 = 8 M and V1 = 7000 ml = 7 L
V2 = 50000 ml = 50 L
So, we can substitute these values in the equation to find the final concentration:
C2 = (C1 * V1) / V2 = (8 M * 7 L) / 50 L = 0.224 M
So, the final concentration of the solution after dilution will be 0.224 M.
The process of dilution involves increasing the volume of a solution while maintaining the same number of solute particles. The concentration of the solution decreases as the volume increases. To calculate the concentration of a solution after dilution, you can use the formula C1 * V1 = C2 * V2. In this formula, C1 is the initial concentration of the solution, V1 is the initial volume, C2 is the final concentration of the solution after dilution, and V2 is the final volume after dilution. By substituting the given values, you can find the final concentration of the solution. The process of dilution is useful in many applications, including adjusting the strength of chemicals for specific uses, preparing samples for analysis, and controlling the reaction rate in chemical reactions.
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A sample of 4.30 moles of NH3 gas occupies 6.50 L at 45°C. Calculate the pressure of the gas in atm.
The pressure of the NH3 gas is 2.19 atm, a sample of 4.30 moles of NH3 gas occupies 6.50 L at 45°C.
What is a gas pressure?Gas pressure is the force per unit area exerted by a gas on the walls of its container. It is a measure of the number of gas molecules colliding with the container's walls per unit of time, and is proportional to the number of gas molecules and their kinetic energy. It is a result of the gas molecules moving randomly in all directions and colliding with the walls of the container. When a gas is confined in a container, its pressure is exerted equally in all directions. The pressure is a scalar quantity, which means it has only magnitude and does not have a direction.
Gas pressure can be measured in a variety of units, including atmospheres (atm), torr, pascals (Pa), and pounds per square inch (psi). The most commonly used units for measuring gas pressure are atmospheres and pascals.
Calculation of Gas PressureTo calculate the pressure of a gas, the Ideal Gas Law is used which states that [tex]PV = nRT[/tex], where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
First step: Convert the temperature from Celsius to Kelvin:
45°C + 273.15 = 318.15 [tex]K[/tex]
Second step:Plug in the values and solve for P:
[tex]P = (nRT) / V[/tex]
[tex]P = (4.30 moles * 0.0821 Latm/molK * 318.15 K) / 6.50 L[/tex]
[tex]P = 2.19 atm[/tex]
So, the pressure of the [tex]NH3[/tex] gas is 2.19 [tex]atm[/tex].
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In order for rocks to be classified as igneous, the rocks must
In order for rocks to be classified as igneous, the rocks must be developed from molten lava.
What is rock?Rock is a naturally occurring and cohesive conglomerate of one or more minerals in geology. These aggregates are the fundamental unit of the solid Earth and often form identifiable and mappable volumes. Rocks are typically classified into three broad groups based on the processes which resulted in their creation.
Igneous rocks are those that developed from molten lava. The heat within the earth's mantle turns this substance liquid. When magma rises to the earth's surface, it is known as lava. When lava cools, it forms rocks like tuff and basalt.
Therefore, in order for rocks to be classified as igneous, the rocks must be developed from molten lava.
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assume that your experimental mass percentage of copper was 38.92%. compared to the theoretical mass percent of copper in copper(ii) sulfate pentahydrate, was the experimental mass percent higher, lower, the same as, or unable to be determined? lower higher same cannot be determined
The comparison to the theoretical mass percent of copper in copper(ii) sulfate pentahydrate was the experimental mass percent higher.
Thus, the correct answer is higher (B).
Copper sulfаte pentаhydrаte, expressed in chemicаl notаtion аs [tex]CuSO_{4}-5H_{2}O[/tex], represents а “hydrаte.” Hydrаtes consist of аn ionic substаnce, а compound comprised of а metаl аnd one or more nonmetаls, plus wаter molecules, where the wаter molecules аctuаlly integrаte themselves into the solid structure of the ionic compound. This meаns, however, thаt а 100-grаm sаmple of copper sulfаte pentаhydrаte does not consist of 100 grаms of copper sulfаte.
This meаns thаt а 100-grаm sаmple of copper sulfаte pentаhydrаte will contаin 61.08 grаms of copper sulfаte. It аlso meаns thаt copper sulfаte pentаhydrаte contаins 100 - 61.08 = 38.92 percent wаter by mаss.
Your options aren't well arranged, but most probably your options were
A. lower
B. higher
C. same
D. cannot be determined
Thus, B is the correct answer.
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Acetylene gas (C2H2) reacts with oxygen to produce carbon dioxide and water. When 30. 0 g of acetylene is reacted with O2, 18. 5 g of water is formed
Acetylene gas (C2H2) reacts with oxygen to form carbon dioxide (CO2) and water (H2O) through the following chemical reaction:
[tex]C_2H_2 + O_2 \rightarrow CO_2 + H_2O.[/tex]
When 30.0 grams of acetylene is reacted with O2, 18.5 grams of water is produced as a result of the reaction. The production of 18.5 grams of water from 30.0 grams of acetylene suggests that the reaction has proceeded to completion, with all of the acetylene being consumed and transformed into its products. The reaction is exothermic, meaning that it releases heat energy. This reaction is important in various industrial processes, including welding and cutting metal
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Q)- Acetylene gas (C2H2) reacts with oxygen to produce carbon dioxide and water. When 30. 0 g of acetylene is reacted with O2, 18. 5 g of water is formed What do you understand by this reaction?
Select the conversion factors needed to convert the distance in meters to inches 84.2m*=3310in
The conversion factor to convert any distance of meters into inch is by multiplying the distance in meters by 39.37.
One meter is near about equal to 39.3700787402 inches. Inches and meters both are units to measure the distance. Let's break it down. We know there are 12 inches in a foot and there are about 3.281 feet in a meter and there is 39.37 inches in a meter.
Now, let's see how many feet are in 4 meter. To do that we are going to multiply the number of feet in one meter times four. So, 4 × 3.281, that equals 13.124.
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12.2 g of aluminum nitrite and 92.5 g of ammonium chloride react to form aluminum chloride, nitrogen, and water. how many grams of the excess reagent remain after the reaction? enter to 1 decimal place.
The amount of excess NH4Cl remaining after the reaction is 55.7 g.
To find the amount of excess reagent in this reaction, we first need to write a balanced chemical equation for the reaction between aluminum nitrite (Al(NO3)2) and ammonium chloride (NH4Cl):
Al(NO3)2 + 6NH4Cl -> 2AlCl3 + 6NH3 + 6H2O
From this equation, we can see that for every 1 mole of Al(NO3)2, 6 moles of NH4Cl are required. We can determine the limiting reagent by finding the number of moles of each reactant and comparing them. The limiting reagent is the reactant that will run out first, meaning that the amount of product produced will be determined by the limiting reagent.
First, we'll find the number of moles of each reactant:
12.2 g Al(NO3)2 / 106 g/mol
= 0.115 mol Al(NO3)2
92.5 g NH4Cl / 53.5 g/mol
= 1.73 mol NH4Cl
Since 1.73 mol NH4Cl > 0.115 mol Al(NO3)2, we can say that
Al(NO3)2 is the limiting reagent NH4Cl is the excess reagent.The amount of NH4Cl used in the reaction is 0.115 mol Al(NO3)2 * 6 mol NH4Cl/1 mol Al(NO3)2 = 0.69 mol NH4Cl.
The amount of excess NH4Cl is 1.73 mol - 0.69 mol = 1.04 mol.
Finally, we can convert the number of moles of excess NH4Cl to grams:
1.04 mol * 53.5 g/mol = 55.7 g.
So, the amount of excess NH4Cl remaining after the reaction is 55.7 g to one decimal place.
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A sample of 25.2g of candy bar was burned in a calorimeter. The calorimeter was calibrated to have a heat capacity of 8.72 kcal/Celsius. Calculate the food caloric content of the candy bar in nutritional calories per gram to three significant figures
The food caloric content of the candy bar in nutritional calories per gram to three significant figures is 890 cal/g
The heat released from the burning candy bar was measured and found to be 44.6 kcal. To find the food caloric content of the candy bar, we need to determine the amount of heat released per gram of candy bar.
First, we need to find the change in temperature of the calorimeter. This can be done by dividing the heat absorbed by the calorimeter (44.6 kcal) by its heat capacity (8.72 kcal/Celsius).
Change in temperature = 44.6 / 8.72 = 5.1 Celsius
Next, we need to divide the heat released from the candy bar (44.6 kcal) by the change in temperature (5.1 Celsius) to find the heat released per gram of candy bar.
Heat released per gram = 44.6 / (5.1 × 25.2 g) = 0.89 kcal/g
Finally, to find the food caloric content in nutritional calories per gram, we need to convert the heat energy unit from kilocalories to nutritional calories.
Food caloric content = 0.89 × 1000 = 890 cal/g to three significant figures.
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when the valve is opened, will the total pressure in the apparatus be less than atm, equal to atm, or greater than atm? explain your answer.
The total pressure in the apparatus be less than atm.
How do you find partial pressure in atm?
The partial pressure of a gas in a mixture of gases is the pressure that the gas would exert if it were present alone in a container at the same temperature and volume. The partial pressure of a gas in a mixture of gases can be found by dividing its mole fraction by the total pressure of the gas mixture. For example, if a gas mixture has a total pressure of 1 atm and the mole fraction of the gas in question is 0.4, then the partial pressure of the gas is 0.4 atm.
The volume of the container for each gas will rise when the valve is opened. Both of the gases' pressures will drop in accordance with Boyle's law. As a result, the pressure of the gas coming from valves 1 and 2 will fall, resulting in a lower than atm overall pressure in the apparatus.
Therefore, less than atm is the correct answer.
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over a certain time period, the steam plant produced 162 million btu of heat, 23,610 g of sulfur dioxide, and 1623 g of particulate matter. determine how many tons of each type of coal the steam plant must have burned. include a vector equation as part of your solution.
3.9 tons of A and 1.8 tons of B must be burned for Steam power plants.
Steam power plants consist of boilers, steam turbines, generators, and other ancillary equipment. Boilers produce high pressure, high temperature steam. A steam turbine converts the thermal energy of steam into mechanical energy. The generator then converts mechanical energy into electrical energy.
The amount of tons of each type of coal the Steam power plants must have burned is represented by the vector equation:
x1v1 + x2v2 = b
[tex]\left[\begin{array}{ccc}27.6&3100&250\\30&6400&360\\23&23610&1623\end{array}\right][/tex]
where first row represents v1, second row represents v2 and third row represents v3.
3.9 tons of A and 1.8 tons of B must be burned.
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which equation should you use to find the final number of moles of gas in the balloon after the deflation?
To find the final number of moles of gas in a balloon after deflation, you can use the ideal gas law equation, which is PV = nRT
PV = nRT
where P is the pressure of a gas , V is the volume of the gas , n is the number of moles of gas, R is the gas constant, and T is the gas's temperature.
If you know the initial pressure, volume, temperature, and number of moles of gas, and the final pressure and volume after deflation, you can use the equation to calculate the final number of moles of gas in the balloon at final pressure .
Here's an example:
Initial conditions: P1, V1, T1, n1
Final conditions: P2, V2, T2, n2
We know that T1 = T2 (the temperature is constant)
So, we can substitute these values into the ideal gas law equation:
P1V1 = n1RT
P2V2 = n2RT
Solving for n2, we get:
n2 = (P1V1) / RT = (P2V2) / RT
Therefore, the final number of moles of gas in the balloon after deflation can be determined by using this equation.
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calculate your experimentally determined percent mass of water in manganese(ii) sulfate monohydrate. unrounded rounded experimentally determined percent mass of water
The mass percentage of water in hydrated magnesium sulfate (MnSO4 . H2O) will be 10.6%.
Percentage mass: The percentage mass is the ratio of the mass of the element or the molecule in the given compound.
The percentage can be given as:
Percent Mass = Mass of molecule / total mass of compound x 100%
The mass of the water is 18.02 g/mole and the molar mass of hydrated magnesium sulfate (MnSO4 . H2O) will be 169.03 g/mol.
Thus, Percent Mass = 18.02 / 169.03 x 100%
Percent Mass = 10.6 %
Therefore, the mass percentage of water in hydrated magnesium sulfate (MnSO4 . H2O) will be 10.6%.
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--The given question is incomplete, the complete question is
"Calculate your experimentally determined percent mass of water in Manganese(II) sulfate monohydrate. Report your result to 2 or 3 significant figures, e. g. 9.8% or 10.2%."--
S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2O
In the above equation how many grams of water can be made when 2 grams of HNO3 are consumed?
Explanation:
1 mole of HNO3 reacts with 1 mole of S to produce 1 mole of H2SO4, 6 moles of NO2, and 2 moles of H2O.
So, when 2 grams of HNO3 (1 mole) reacts, it produces 2 moles of H2O, which is equal to 2 x 18 = 36 grams.
Therefore, 36 grams of water can be made when 2 grams of HNO3 are consumed
g(t)=-2.3r² +3.5t; Find g(8.6)
g(t)=-2.3t² +3.5t; The value of g(8.6) is -140.008. Two expressions that are set equal to one another in a mathematical statement are the definition of an algebraic equation.
What does the phrase mean when it is simplified?To simplify a phrase, create an equivalent expression without any terms that are identical. The expression will then be rewritten using the fewest terms feasible.
What exactly is the simplification law?Applying the concepts of necessity and proportionality strictly is a requirement for simplifying legislation. The practise entails eliminating outmoded laws and regulations as well as codifying, recasting, and consolidating legislation.
Given;
g(t) = -2.3t^2+3.5t
Substitute t =8.6
g(t) = -2.3(8.6)^2+3.5(8.6)
g(t) = -170.108+30.1
g(t) = -140.008
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A 151.10 mL volume of hydrochloric acid reacts completely with a solid sample of MgCO3. The reaction is given below.
2 HCl(aq) + MgCO3(s) → CO2(g) + H2O(l) + MgCl2(aq)
The volume of CO2 formed is 153.00 mL at 27.1 °C and 772 mmHg. What is the molarity of the HCl solution?
Answer:
0.0415 M
Explanation:
To solve this problem, we need to use the ideal gas law to calculate the number of moles of CO2 formed, and then use stoichiometry to calculate the number of moles of HCl used in the reaction. Finally, we can calculate the molarity of the HCl solution using the volume and number of moles of HCl.
First, let's calculate the number of moles of CO2 formed:
PV = nRT
where P is the pressure in atm, V is the volume in L, n is the number of moles, R is the gas constant (0.08206 L·atm/K·mol), and T is the temperature in Kelvin.
We need to convert the volume of CO2 from mL to L, the temperature from Celsius to Kelvin, and the pressure from mmHg to atm:
V = 153.00 mL = 0.15300 L
T = 27.1 °C + 273.15 = 300.25 K
P = 772 mmHg / 760 mmHg/atm = 1.016 atm
Plugging in these values, we get:
n = PV/RT = (1.016 atm)(0.15300 L)/(0.08206 L·atm/K·mol)(300.25 K) ≈ 0.00627 mol CO2
According to the balanced chemical equation, the reaction between HCl and MgCO3 has a 1:1 stoichiometry, which means that the number of moles of HCl used in the reaction is also approximately 0.00627 mol.
The volume of HCl used is 151.10 mL, or 0.15110 L. Therefore, the molarity of the HCl solution is:
M = n/V = 0.00627 mol / 0.15110 L ≈ 0.0415 M
Therefore, the molarity of the HCl solution is approximately 0.0415 M.
How many molecules are in 450 grams of Na2SO4?
Answer: 1.90834 X 10 ^ 24
Explanation:
Molar mass Na2SO4 = 23x2+ 32+16X4
= 142g/mol
Mass of Na2SO4 = 450g
Moles of Na2SO4 = mass/ molar mass
= 450g/142g/mol = 3.170 mol
Avogadro's number = 6.02X 10 ^ 23/mol
Number of molecules = moles X avogadro's number
= 3.17 X 6.02X 10^ 23 = 1.90834 X 10 ^ 24 molecules
Therefore the number of molecules of Na2SO4 is1.90834 X 10 ^ 24
which solid would you expect to have the highest melting point? which solid would you expect to have the highest melting point? cao(s) kr(s) i2(s)
Out of the three solids, Iodine (I2) is expected to have the highest melting point.
This is because the intermolecular forces between iodine molecules are stronger than those between the other two substances, making it more difficult to separate the individual molecules. The stronger the intermolecular forces, the higher the energy required to separate the molecules and the higher the melting point. In comparison, Calcium oxide (CaO) and Krypton (Kr) have weaker intermolecular forces and therefore, lower melting points.
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The percent of P in Li3PO4 is
when testing for the presence of sugar, what are the limitations of the benedict's test? select four answers.
The benedict's test is used to analysis the sugar sample. The correct choice for the limitations of the benedict's test are option(A) , (B), (C) and (E).
The Benedict test is a chemical analysis procedure that can be used to determine the reduced sugar content of a solution. Benedict's test is a qualitative test that distinguishes between reducing and non-reducing carbohydrates (sugars/saccharides). The limitations of the Benedict test include:
Unable to determine exact concentration of reducing sugar.Only semi-quantitative estimates can be provided.carbohydrate identification requires further testing.A color change in the test is not evidence and is not used in the analysis of colored complexes.Therefore, the limitations of benedict's test are A,B, C, E.
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Complete question:
When testing for the presence of sugar, what are the limitations of the Benedict's test? (select all that apply)
A. It could not be used with intensely colored samples.
B. There is not a clear color change
C. You cannot tell which reducing sugar is present (i.e. glucose vs fructose vs maltose)
D. It cannot be used on a solid sample unless the sugars are extracted first
E. It doesn't detect sucrose and other non-reducing sugars, only small reducing sugars
F. You might burn your hand if you are not careful
a compound made of bismuth (bi) and fluorine (f) is 68.8% bi (208.98 g/mol) and 31.2% f (18.009 g/mol). what is the name of this compound? bismuth is a metal with multiple possible charges as a cation.
The compound made of bismuth and fluorine is likely Bismuth(III) Fluoride, also known as Bismuth Trifluoride, with the chemical formula BiF3.
Bismuth is a metal with multiple possible charges as a cation, and its oxidation state can vary from -3 to +5. In this case, the compound is made up of 68.8% bismuth and 31.2% fluorine, which indicates that bismuth is in the +3 oxidation state, and the compound is Bismuth(III) Fluoride (BiF3).
This compound is a white crystalline solid that is often used as a component in optical materials, electroceramics, and in the production of other bismuth compounds.
Bismuth is a heavy, silvery-white metal that is known for its low toxicity and low thermal and electrical conductivity. Bismuth(III) Fluoride, as the name suggests, is composed of bismuth cations (Bi3+) and fluoride anions (F-). The compound forms a crystalline solid structure where the bismuth and fluoride atoms are held together by strong ionic bonds.
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air consists of question 62 options: a mixture of gases that behaves as if it were a single gas. mostly carbon dioxide and water vapor. oxygen only. gases that are not well mixed.
With traces of water vapor, carbon dioxide, argon, and other gases, air is a mixture of gases made up of 78% nitrogen and 21% oxygen.
Three gases, nitrogen, oxygen, and argon, account for more than 99% of the air's composition. In very minute amounts, air also contains various gases, including gaseous water, sometimes known as water vapor. Solids and liquids can also be found in air. Pollen, dust, and soot are examples of solids in the air. The gaseous elements nitrogen, oxygen, and lower concentrations of other elements make up the homogenous combination known as air. N2 (78%), O2 (21%), argon (1%), carbon dioxide (0.03%), and water vapor are among the several gases that make up air. These vapors have variable chemical compositions.
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the molecular formula of glucose is c6h12o6. what would be the molecular formula for a polymer made by linking eight glucose molecules together by dehydration reactions?
A molecule created by dehydration reactions joining three glucose molecules together would have the chemical formula C18H32O16.
By removing water molecules, dehydration reactions cause the molecules to create new chemical connections with one another. Three glucose molecules would dehydrate together, joining the separate molecules to create a bigger molecule. Since it is a dehydration reaction, it means that when two molecules are linked together, there will be one molecule of water removed. In this case, the larger molecule would have three times the number of carbon resulting in the molecular formula C18H32O16.
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A sample of 25.2g of candy bar was burned in a calorimeter. The calorimeter was calibrated to have a heat capacity of 8.72 kcal/Celsius. Calculate the food caloric content of the candy bar in nutritional calories per gram to three significant figures
A candy bar has a food calorie count of 5.78.
The heat capacity is 8.72 kilocalories per degree, and 1 food calorie or his 1 nutritional calorie equals 1 kilocalorie. equation:
c=[tex]\frac{e}{dt}[/tex]
c = 8.72
Delta t is the change in temperature, reported as 16.7 degrees Celsius. so solve
e=145.624 kcal
We know that 1 kilocalorie equals 1 food calorie, so 145 equals 145,624 food calories. Now you have to divide this by the grams of chocolate or candy bar. This was 25.2 grams. 5.78. Remember you need to round up. This is food calories per gram.
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for the reaction c + 2h2 -> ch4 how many grams of carbon are required to produce 18.5 moles of methane, ch4?
Total 14.4 g of carbons are required produce 18.5 moles of methane, CH₄
Calculating the problem:C + 2H₂ ==> CH₄
molar mass, C = 12 g / mol
molar mass, H = 1 g / mol
molar mass, CH₄ = 12 + 4 = 16 g / mol
So,1.2 mol CH₄ x 1 mole C / mol CH₄ x 12 g C / mol C = 14.4 g C
What is a molar mass, exactly?A substance's molar mass is the mass that contains one mole of the substance. Simply put, it is the weight of one substance mole. Each substance's atomic mass is multiplied by the subscript of that element in the chemical formula to determine its molar mass.
How is molar mass calculated?An element's atomic mass expressed as g/mol is its characteristic molar mass. However, the atomic mass in amu can also be multiplied by the molar mass constant (1 g/mol) to obtain the molar mass. Add up all of the atomic masses of the individual atoms in a compound to get its molar mass.
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Is salt a physical or chemical?
Answer:
Chemical
Explanation:
I remember learning this in AP Chemistry class. Salt is an ionic compound that comes from the neutralization reaction of an acid and a base. If I am wrong, I am sorry it has been a long time since I passed the Chemistry class.
an atom's identity is directly determined by a. the number of electrons it has b. the number of neutrons it has c. the number of protons it has d. the number of bonds it can form e. its atomic weight
The answer is c. the number of protons it has. The number of protons in the nucleus of an atom determines the element's atomic number on the Periodic Table, which in turn determines its identity.
All atoms of the same element have the same number of protons, and this number is unique to each element. For example, carbon has six protons and is atomic number 6.
Atoms of different elements can form chemical bonds with each other in order to form molecules, compounds, and other substances. The type of bond formed depends on the number of electrons in the outermost shell of each atom and the attraction between them. For example, atoms with an even number of electrons in their outermost shell tend to form covalent bonds with other atoms, while atoms with an odd number of electrons tend to form ionic bonds.
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A tire is at a pressure of 250 KPa at a temperature of 25°C. Calculate the pressure of the tire at -10°C.
The pressure of the tire at -10°C would be 220.64 kPa.
Pressure lawAccording to the pressure law, the pressure exerted by molecules of gases is directly proportional to the absolute temperature of the gases.
This is mathematically expressed as: P1/T1 = P2/T2
Where P1 and P2 are the initial and final pressure and T1 and T2 are the initial and final temperature of the gas.
In this case, P1 = 250 kPa, T1 = 25°C or 298K, and T2 = -10°C or 263K
P2 = P1 x T2/T1 = 250 x 263/298
= 220.64 kPa
In other words, the new pressure of the tire would be 220.64 kPa.
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