GUYS HELPP
Convert the following number of moles of the chemical into its corresponding mass in grams
1. 2.360 moles of lead (II) oxide
Convert the following masses into their corresponding number of moles.
2. 23.5 g of sodium chloride
3. 0.778 g of sodium cyanide
Convert the following number of moles into their corresponding number of particles.
4. 0.0455 moles of hydrochloric acid
[tex]mass = number \: of \: moles \times molar \: mass[/tex]
1)[tex]m = 2.36(223.2) = 526.752 \: grams[/tex]
2)[tex]n = \frac{mass}{molar \: mass} = \frac{23.5}{58.4} = 0.40239 \: moles[/tex]
3)[tex]n = \frac{0.778}{49} = 0.0158775 \: moles[/tex]
4)[tex]n = \frac{number \: of \: particles}{avogadros \: constant} [/tex]
[tex]n \: o \: p = 0.0455 \times 6.02 \times 10 {}^{23} = 2.7391 \times 10 {}^{22} particles[/tex]
Mass in grams of 2.360 moles of lead (II) oxide is 0.0105.
What is mole concept?Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.
Given, No. of moles of lead oxide = 2.360 grams
No. of moles = Mass of compound ÷ Molar mass of compound
No. of moles = 2.36 ÷ 223.2
No. of moles = 0.0105
Therefore, Mass in grams of 2.360 moles of lead (II) oxide is 0.0105.
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What is the acceleration between 20 to 30 seconds?
Answer:
It would start at 0 and keep graduatly growing bigger and bigger numbers
Explanation:
The percent yield of a chemical reaction is valuable to many industries. Low percent yields can result in the loss of large amounts of money. Which of the following would likely increase the percent yield of a reaction? Check all that apply. Using accurate measurements using pure chemicals performing the reaction under the most ideal conditions adding water to the experiment.
Using accurate measurements, using pure chemicals and performing the reaction under the most ideal conditions is important to get a valuable percent yield.
How we calculate the percent yield?Percent yield of any chemical reaction is define as the ratios of the actual yield to the theoretical yield of the product and multiply by the 100.
To get the high percent yield or actual yield of any reaction, we have to perform the reaction under ideal condition because if we not use the standard condition then we get the low rate of reaction. Reactants should be present in the pure form as impurity make unwanted products and reduce the productivity of main product and accurate amount of reactants also important for the spontaneous reaction.
Hence, options (a), (b) & (c) are correct.
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1. particles of an atom.
2. what is a neutron
Answer:
1. The three parts of an atom are:
ProtonsNeutronsElectrons2. A neutron is a particle of an atom with a neutral charge.
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What is the mass number of a cobalt atom that has 27 protons and
30 neutrons?
Answer:
all u need to do is this 27 + 30 = 57.
Explanation:
The atomic mass unit is equivalent to 1 of the mass of a neutral atom of which element? (1 point)
O carbon
o hydrogen
O gold
O oxygen
The atomic mass unit is equivalent to 1 of the mass of a neutral atom of carbon.
What is Atomic Mass Unit?It is defined as one out of twelve parts of the mass of the neutral atom of the most abundant isotope of carbon, that is, carbon 12.
By this definition, it is obvious that the atomic mass unit of elements is measured with respect to the mass of a neutral atom of carbon 12 - not hydrogen, gold, or oxygen.
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chemistry balance equations C2H +O2=CO2+H2O
Invalid equation.
..............
Three years after the first Moon landing, which two countries linked up spacecrafts to famously shake hands?
A. China and Russia
B. the United States and the Soviet Union
C. China and the United States
D. Russia and the Soviet Union
Answer: B. the United States and the Soviet Union
Explanation:
True or false for the following questions?
Answer:
T
F
T
Explanation:
hope it helps! sorry for no explanation
PLEASE HELP!
what are the steps that occur during the combustion of hydrogen?
Answer:
In flame of pure hydrogen burning in air, the hydrogen (H2) reacts with oxygen (O2) to form water (H2O) with the release of energy. In atmospheric air rather than pure oxygen, hydrogen combustion may yield a small amount of nitrogen oxides with the water vapor. The energy released allows hydrogen to be used as a fuel.
Explanation:
Here are the steps that occur during the combustion of hydrogen; Initiation, Propagation, Completion, and Energy Release.
The combustion of hydrogen involves a chemical reaction with oxygen in the air, resulting in the release of energy in the form of heat and light.
Initiation: The combustion process begins by supplying energy to break the initial bonds in the reactant molecules. In the case of hydrogen combustion, heat or an external ignition source is provided to break the diatomic hydrogen molecules (H₂) into individual hydrogen atoms (H).
H₂ → 2H
Propagation: Once the hydrogen molecules are dissociated into hydrogen atoms, they react with oxygen (O₂) molecules from the air. This reaction occurs in a chain reaction mechanism involving three steps: initiation, propagation, and termination.
Initiation: Hydrogen atoms react with oxygen molecules to form hydrogen peroxide (H₂O₂) and hydroxyl radicals (OH).
H + O₂ → HO₂
H + HO₂ → H₂O₂
Propagation: The hydroxyl radical (OH) reacts with hydrogen molecules to form water vapor (H₂O) and release heat.
OH + H₂ → H₂0 + H
Termination: The chain reaction terminates when two radicals combine to form stable products.
H + OH → H₂0
Completion: The chain reaction continues as long as there is a sufficient supply of hydrogen and oxygen. The hydrogen atoms released in the propagation step can initiate further reactions with more oxygen molecules, leading to the complete combustion of hydrogen to form water vapor (H₂O).
H₂ + O₂ → H₂O
Energy Release: The combustion of hydrogen is an exothermic reaction, which means it releases energy in the form of heat and light. This energy is responsible for the heat and light produced by a burning hydrogen flame.
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Find the distance that a car traveled that went 50 miles per hour in 3 hours.
The car travels 50 miles per hour. To find the distance it travelled in 3 hours, multiple 50 by 3.
50 x 3 = 150
Therefore, the car would travel 150 miles in 3 hours.
help this question im kinda stuck on
Answer:
Explanation:
i think it is the last one. hope it is correct
Heat transfer through direct contact between molecules
Answer:
This is an example of a form of energy transferring itself. Tons of electrons are passed through the energy itself to you very quickly. That's why when we touch a hot surface and get burned, it's because our skin molecules are touching the heat molecules.
force acts on it.
Newton's first law of motion states that an object remains at rest unless a
a. balanced
c. gravitational
b. frictional
d. net
Answer:D.
Explanation:
5. A flame test can be used to identify an unknown element. A student reacts two chemicals and decides to perform a flame test on the resulting product. If the product gives off a magenta hue when in flames, which element is likely to be present? Use your lab data to help determine the identity of this element.
Answer:
The element that is likely to be present is LITHIUM.
Explanation: ABOUT FLAME TEST
An analytical chemistry method used to help identify metal ions is the flame test. It can not be used to classify all metals, although it is a useful qualitative research test and a lot of fun to perform, since not all metal ions emit flame colors. Some metal ions also display colors similar to each other, making it difficult to tell them apart. However, for the detection of various metals and metalloids, the test is still useful.
One downside of the flame test is that the light color that is detected depends very much on the flame's chemical composition (the fuel that is being burned). This makes it difficult to match colors with a chart that has a high level of trust.
The bead test or blister test, in which a bead of salt is coated with the sample and then heated with a Bunsen burner flame, is an alternative to the flame test. Because more samples stick to the bead than to a simple wire loop, this test is slightly more accurate and Since most Bunsen burners, which appear to burn with a clean, blue flame, are linked to natural gas.
ABOUT LITHIUM ELELMENT -:It's metal, but it's soft enough to cut with a knife .It is so light that water can float on it. It is hard to put out lithium fires. Lithium, along with hydrogen and helium, was one of the three elements that the Big Bang produced in vast amounts.
Hence , we identifies the element in flame test by the color produces that is magenta or pink-red which gives the element Lithium . Therefore , the correct answer is lithium.
K electron configuration
Answer:
Question stealer :]]
Explanation:
Janet learns that Earth is tilted. Due to its tilt, some areas on the surface of Earth experience darkness for an entire day. Which plant process is affected most during this darkness?
root growth
root growth
reproduction
reproduction
photosynthesis
photosynthesis
water absorption
water absorption
Photosynthesis is that plant process is affected most during this darkness because photosynthesis only occurs when there is sunlight.
What is photosynthesis?Photosynthesis is a process in which water and carbondioxide combine in the presence of sunlight and produce glucose and oxygen. We know that Photosynthesis occurs only at daytime.
So we can conclude that Photosynthesis is affected during this darkness because photosynthesis only occurs when there is sunlight.
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The molecular weight of water, H2O is 18.02 g/mol. How many moles of water are in 24.3 g of water?
Answer:
1.35moles
Explanation:
mm=18.02gmol⁻¹ mass=24.3g
mole=mass/mm
mole=24.3/18.02
mole=1.35moles
Answer:
The answer is 1.35 molesExplanation:
To find the number of moles given the molecular weight and mass we use the formula
[tex]n = \frac{M}{m} \\ [/tex]
where
n is the number of moles
M is the molar mass
m is the mass of the substance
From the question
m = 24.3 g
M = 18.02 g/mol
We have
[tex]n = \frac{24.3}{18.02} \\ = 1.348501664...[/tex]
We have the final answer as
1.35 molesHope this helps you
Identify which of these molecules has the highest boiling point and give the reasoning why in terms of intermolecular force. CHCI3,CH3COOH, CO2
Answer:
CH3COOH
Explanation:
CH3COOH has the highest boiling point because it participates in the strongest intermolecular interactions. The -OH group can participate in hydrogen bonding with other -OH groups. Hydrogen bonds are very strong because they are the result of large partial positive charge on the hydrogen and large partial negative charge on the oxygen. When surrounded by other -OH groups, the partial positive charge on the hydrogen can form temporary bonds with the partial negative charge of an oxygen on another molecule. The stronger the intermolecular interactions, the more difficult they are to overcome, thus increasing the boiling point.
The strongest IMF the other molecules participate in are dipole-dipole. These interactions are not as strong as hydrogen bonding.
An unidentified flying object has crashed in your yard! An alien emerges from the wreckage. The alien tells you that it has traveled here from the planet Geela which is 5.670x10^3 light years away. How many miles away is Geela? 1.06 x 10^-16 light years = 6.21 x 10^-4 miles
Answer : Geela away is [tex]33.22\times 10^{15}\text{ miles}[/tex]
Explanation :
As we are given that the alien tells you that it has traveled here from the planet Geela which is 5.670 × 10³ light years away.
And we know that:
[tex]1.06\times 10^{-16}\text{ light years}=6.21\times 10^{-4}\text{ miles}[/tex]
Now we have to determine the distance away is Geela.
As, [tex]1.06\times 10^{-16}\text{ light years}=6.21\times 10^{-4}\text{ miles}[/tex]
So, [tex]5.670\times 10^{3}\text{ light years}=\frac{5.670\times 10^{3}\text{ light years}}{1.06\times 10^{-16}\text{ light years}}\times 6.21\times 10^{-4}\text{ miles}[/tex]
= [tex]33.22\times 10^{15}\text{ miles}[/tex]
Therefore, the Geela away is [tex]33.22\times 10^{15}\text{ miles}[/tex]
Classify the following materials as solid, liquid, or gas at room temperature: milk, helium , granite , oxygen , steel , and gasoline
Answer:
milk liquid
helium gas
granite solid
oxygen gas
steel solid
gasoline liquid
Answer: Milk is liquid. Helium is gas. Granite is solid. Oxygen is gas. Steel is solid. Gasoline is liquid.
Explanation:
This table shows the mass and volume of four different objects.
Which ranks the objects from most to least dense?
X, Y, W, Z
X, Z, Y, W
W, Y, Z, X
Z, Y, X, W
Answer:
second one/ B
Explanation:
just took the quiz
Answer:b
Explanation:
Which is heavier, 0.5 moles of Mg or 5 moles of H2?
Answer:
hydrogen
Explanation:
b/c H= 5×2=10
Mg=0.5×1 =1
6. What type of relationship is shown in the image below?
1 point
500
400
300
Mass, 9
200
100
0
0
200
400
600
800
1000
Volume, ml
Direct
Exponential
O Indirect
Inverse
Answer:
A direct relationship
Explanation:
The graph shows a direct relationship due to the fact that the line is going up in a positive correlation/increasing as the amount of mass and volume increase.
This formula equation is unbalanced.
P4(s) + Cl2(g) Right arrow. PCl3(l)
Which coefficient should be placed in front of PCl3 to balance this equation?
1
2
4
6
Answer:
4
Explanation:
Answer to balance the equation
P4 + 6Cl2 => 4PCl3
Answer:
C
Explanation:
What are two costs of using tides for energy?
Answer:
Answer: According to 2019 figures from the US Department of Energy, the average commercial tidal energy project costs as much as $280 per megawatt hour. Wind energy, by comparison, currently costs roughly $20 per megawatt hour and is "one of the lowest-priced energy sources available today," according to the agency.
Explanation:
Answer:
The two cost of using tides for energy is solor and wind.
what are air pollutants
Answer:
things that pollute the air
Explanation:
nuclear energy, fossil fuels, gas from cars and other transportation, and these all contribute to greenhouse gases that are harmful to the environment
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60 points and brainliest! please help me i will appreciate it!
The diagram below shows a helium atom and its
corresponding symbol.
Symbol: 4
HE
2
What does the top number in the symbol tell you
about the atom?
This is the mass number A. It shows the number of nucleons (neutrons and protons in the nucleus). It is made up of the atomic number Z and the neutron number N:
A = Z + N
Using the example of helium:
Helium has a mass number A of 4 and the atomic number Z 2, so the atom has 2 neutrons in its nucleus.
A = Z + N
4 = 2 + 2
Physician Barry Marshall infected which test subject to investigate the role of Helicobacter pylori in peptic ulcers?
Cats
Dogs
Guinea pigs
Himself
None of the above