Answer:
Oxygen is a reactant of cellular respiration, while being the product for photosynthesis
Explanation:
Photosynthesis
carbon + water + sunlight -> oxygen and glucose
Cellular respiration
oxygen + glucose -> carbon + water + ATP
Which of the following acts as a catalyst in catalytic converters?
Metal acts as a catalyst in catalytic converters
What do food webs show about an ecosystem
Answer:
Food webs describe the relationships, inks or connections, among species in an ecosystem, but the relationships vary in their importance to energy flow and dynamics of species populations. Some trophic relationships are more important than others in dictating how energy flows through ecosystems.
2. Calculate the enthalpy of the following chemical reaction:
Dalta H rxn =?
CS (l) + 3O2(8) ---> CO2(g) + 2SO (g)
Given:
C(s) + O2(g) ---> CO2(g)
S(s) + O2(g) --> SO2(g)
C(s) + 2S(s)---> CS (1)
DaltaH = -393.5 kJ/mol
DaltaH = -296.8 kJ/mol
DaltaH = +87.9 kJ/mol
The enthalpy of the chemical reaction: ΔH rxn = -1075 kJ/mol
Further explanationBased on the principle of Hess's Law, the change in enthalpy of a reaction will be the same even though it is through several stages or ways
Reaction
CS₂ (l) + 3O₂(g) ---> CO₂(g) + 2SO₂ (g)
1. C(s)+O₂(g)⇒CO₂(g) ΔH=-393.5 kJ/mol
2. S(s)+O₂(g)⇒SO₂(g) ΔH=-296.8 kJ/mol x 2
2S(s)+2O₂(g)⇒2SO₂(g) ΔH=-593.6 kJ/mol
3. C(s)+2S(s)⇒CS₂(l) ΔH=+87.9 kJ/mol
Reverse
CS₂(l)⇒C(s)+2S(s) ΔH=-87.9 kJ/mol
Add all and remove the same compound on different sides
C(s)+O₂(g)⇒CO₂(g) ΔH=-393.5 kJ/mol
2S(s)+2O₂(g)⇒2SO₂(g) ΔH=-593.6 kJ/mol
CS₂(l)⇒C(s)+2S(s) ΔH=-87.9 kJ/mol
---------------------------------------------------------------+
CS₂ (l) + 3O₂(g) ---> CO₂(g) + 2SO₂ (g) ΔH=-1075 kJ/mol
Calculate the concentration of
4602g C12H22O11 in
528 g H₂O in mass percent
Answer:
see in explanation
Explanation:
Use mass of solute/mass of solution x 100
-48.2 gC12H22O11 / (528 gH2O + 48.2 gC12H22O11) x 100 = (48.2/ 576.2) x 100 = 8.37%
Calculate the work when a cylinder equipped with a piston changes volume from 0.200 L to 0.600 L against an external pressure of 3.00 atm (Remember that 101.3 J = 1 L∙atm)
Answer:
[tex]-121.56\ \text{J}[/tex]
Explanation:
[tex]V_1[/tex] = Initial volume = 0.2 L
[tex]V_2[/tex] = Final volume = 0.6 L
P = Pressure = 3 atm
[tex]W=-P\Delta V\\\Rightarrow W=-3(V_2-V_1)\\\Rightarrow W=-3(0.6-0.2)\\\Rightarrow W=-1.2\ \text{L atm}[/tex]
[tex]1\ \text{L atm}=101.3\ \text{J}\\\Rightarrow -1.2\ \text{L atm}=-1.2\times 101.3\ \text{J}=-121.56\ \text{J}[/tex]
Work done is [tex]-121.56\ \text{J}[/tex].
10. How many molecules of NH, could you make with 15 molecules of H2 and 4 molecules of Nz? What is
your limiting reactant? Which reactant is in excess?
15 molecules H2X
molecules NH
molecules H2
4 molecules N2 x
molecules NH3
molecules N2
Amount of NH, made:
Limiting reactant:
Excess reactant:
Limiting reactant : N₂
Excess reactant : H₂
amount of NH₃ : 8 molecules
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
[tex]\tt N_2+3H_2\rightarrow 2NH_3[/tex]
limiting reactant = smaller mol ratio
N₂[tex]\tt \dfrac{4}{1}=4[/tex]
H₂[tex]\tt \dfrac{15}{3}=5[/tex]
limiting reactant ⇒ N₂
The number of reacted H₂ molecules :
[tex]\tt \dfrac{3}{1}\times 4=12[/tex]
The remaining H₂ after the reaction :
[tex]\tt 15-12=3~molecules[/tex]
Amount of NH₃ :
[tex]\tt \dfrac{2}{1}\times 4=8~molecules[/tex]
The element fluorine forms a(n) _______ with the charge__________ . The symbol for this ion is____________ , and the name is _____________. The number of electrons in this ion is__________
Answer:
A chemical element exhibiting the symbol F and atomic number 9 is fluorine. It prevails as an extremely toxic pale yellow diatomic gas at normal circumstances and is the lightest halogen. It is exceptionally reactive as it reacts with all the other elements except for helium, argon, and neon, and is the most electronegative element.
Fluorine like halogens produces an anion with a charge of -1 to acquire stability. The symbol for this ion is F-, and the name given to the ion is fluoride ion. The atomic number of fluorine is 9, therefore, the number of electrons in this anion is 9+1 = 10.
Give the name for the molecular compound with the the formula P2I4.
Answer:
Diphosphorus tetraiodide
Explanation:
Diphosphorus tetraiodide is an orange crystalline solid with the formula P2I4. It has been used as a reducing agent in organic chemistry. It is a rare example of a compound with phosphorus in the +2 oxidation state, and can be classified as a subhalide of phosphorus.
Can I please have brainliest?
The name of the molecular compound with the formula [tex]\rm P_2I_4[/tex] is diphosphorus tetraiodide.
The term "compound" refers to two or more elements joined together such that the elements have lost their individual identity in favor of a new set of properties.
The given molecular compound [tex]\rm P_2I_4[/tex] is diphosphorus tetraiodide.
This name is derived from the prefixes "di-" and "tetra-" which indicate that there are two phosphorus atoms and four iodine atoms in the molecule, respectively. The ending "-ide" is used to indicate that the compound is a binary compound consisting of two different elements.Therefore, diphosphorus tetraiodide is the name of the molecular compound with the formula [tex]\rm P_2I_4[/tex] .
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Xavier boiled 19 grams of water. If all of the water changed into a gas, what would be the mass of the steam?
Answer:
19g
Explanation:
The mass of the steam produced in this phase change process will also be 19g. This is in compliance with the law of conservation of mass.
It states that "mass is neither created nor destroyed in a the cause of reaction". The law suggests that mass is conserved. When steam is heated, it does not lose its mass. The mass of the steam is still the same as that of water.Answer:
Xavier boiled 14 grams of water. If all of the water changed into a gas, what would be the mass of the steam?
A.
28 g
B.
0 g
C.
24 g
D.
14g
Explanation:
16.025 has how many sig fig
Answer:
5
Explanation:
Significant figures:
The given measurement have four significant figures 1234.
All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
Zero between the non zero digits are consider significant like 104 consist of three significant figures.
The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
In given measurement:
16.025 there are 5 significant figures 1,6,0,2,5
What else is produced during the combustion of butane, C4H10? 2C4H10 + 13O2 8________ + 10H2O H2O C4H10 CO2 O2
Answer:
CO2
Explanation:
took the test
Answer:
Co2
Explanation:
How many moles of water would be produced from 3 moles of oxygen in the following reaction? Don’t forget to include units in your answer.
Answer:
6moles of water
Explanation:
Given parameters:
Number of moles of oxygen = 3moles
Reaction equation:
2H₂ + O₂ → 2H₂O
Unknown:
Number of moles of water formed = ?
Solution:
To solve this problem;
compare the number of moles in the reaction.
1 mole of oxygen gas will produce 2 mole of water
3 moles of oxygen gas will produce 3 x 2 = 6moles of water.
9) Consider the reaction of C6H6 Br2 C6H5Br HBr a. What is the theoretical yield of C6H5Br if 42.1 g of C6H6 react with 73.0 g of Br2
Answer:
71.7 g of C₆H₅Br are produced at the theoretical yield.
Explanation:
The reaction is:
C₆H₆ + B₂ → C₆H₅Br + HBr
This is an easy excersie, stoichiometry is 1:1
We determine moles of reactants:
42.1 g / 78g/mol = 0.540 moles of benzene
73 g / 159.80 g/mol = 0.457 moles of hydrogen bromide
Certainly, the HBr is the limiting reactant, because I need 0.540 moles of HBr for 0.540 moles of benzene and I only have, 0.457 moles.
0.457 moles of HBr will produce 0.457 of bromobenzene, at the 100 % yield reaction (theoretical yield)
We convert the moles to mass: 0.457 g . 157 g/mol = 71.7 g
The theoretical yield of the reaction has been 0.457 mol.
The balanced chemical equation for the reaction can be given by:
[tex]\rm C_6H_6\;+\;Br_2\;\rightarrow\;C_6H_5Br\;+\;HBr[/tex]
Accordingly, 1 mole of benzene will give 1 mole of Bromobenzene and 1 mole of Hydrobromide.
The moles can be calculated as;
Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]
Moles in 42.1 grams Benzene:
Moles of Benzene = [tex]\rm \dfrac{42.1}{78}[/tex]
Moles of Benzene = 0.540 mol
Moles of Bromine = [tex]\rm \dfrac{73}{159.80}[/tex]
Moles of Bromine = 0.457 mol.
The limiting reactant in the reaction has been the one that has been present in the lesser quantity as the other reactant to continue to the product formation.
The 1 mole of Benzene requires 1 mole of bromine. So, 0.54 mol of benzene requires. 0.54 mol of bromine. Since the available bromine has been 0.457 mol, Bromine has been the limiting reactant.
The theoretical yield of the reaction will be based on the concentration of Bromine.
Thus, 1 mol of Bromine forms 1 mol of Bromobenzene.
0.457 mol of Bromine will form 0.457 mol of bromobenzene.
The theoretical yield of the reaction has been 0.457 mol.
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A closed container in lab contains a sample of oxygen gas. When the temperature in lab is 16.3 degrees Celcius, the pressure in the container is 9.30 atm. What would the temperature in lab be (in Celcius) if the pressure in the container was 17.7 atm? Assume the mol and volume of the container are constant. Record your answer as a number with the correct significant figures.
Answer:
T₂ = 550.60 K
Explanation:
Given data:
Initial temperature = 16.3°C (16.3+273 = 289.3 K)
Initial pressure = 9.30 atm
Final temperature = ?
Final pressure = 17.7 atm
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
9.30 atm / 289.3 K = 17.7 atm/T₂
T₂ = 17.7 atm × 289.3 K / 9.30 atm
T₂ = 5120.61 atm. K /9.30 atm
T₂ = 550.60 K
As a metal such as lead is heated past its melting point, what happens to the average kinetic energy of the atoms
Answer:
The kinetic energy increases
Explanation:
As a metal such as lead is heated past its melting point, the average kinetic energy of the atoms increases.
When temperature is increased the kinetic energy of the atoms increase which also increases the random movement of the atoms.
When such happens the distance between the atoms is usually decreased which leads to the elastic collision that occurs.
How are put carbon, oxygen, and hydrogen different from the compound ethanol which contains all three of those elements
All the elements such as carbon, oxygen, and hydrogen found in ethanol but when they are seperated from ethanol they have totally different compound. They are pure element and ethanol is a mixture.
What is ethanol?Ethanol is a colourless liquid which catches fire easily and it is produced by the process of natural fermentation of sugars or alcohol.
The chemical formula of ethanol is C2H5OH, molar mass is 46.07 g/mol and its boiling point is 78.37 °C with density 789 kg/m cube.
Ethanol is also known as alcohol which is colourless and slightly toxic chemical compound and ethanol forms water as well as carbon dioxide.Ethanol is a colourless liquid which catches fire easily and it is produced by the process of natural fermentation of sugars or alcohol.
Therefore, All the elements such as carbon, oxygen, and hydrogen found in ethanol but when they are seperated from ethanol they have totally different compound. They are pure element and ethanol is a mixture.
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WHAT IS THE MOLAR MASS FOR AMMONIUM SULFIDE?
A. 59.1g/mol
B.82.2g/mol
C.50.1g/mol
Answer:
68g/mol
Explanation:
The formula of ammonium sulfide is:
Ammonium sulfide = (NH₄)₂S
The molar mass of a compound is the mass in gram of one mole of the substance. In a compound, it is expressed gram formula mass or gram-molecular weight.
It is determined by the addition of the component atomic masses and then expressed in grams;
Atomic mass of N = 14, H = 1 and S = 32
(NH₄)₂S = 2[14 + 4(1)] + 32 = 36 + 32 = 68g/mol
One of the following bonds is nonbonding intermolecular interaction Select one: a. ionic bond b. Van der Waals C. covalent bond d. polar bond
Answer:
b. Van der Waals
Explanation:
Non-bonding intermolecular interaction is simply the same as intermolecular forces between molecules.
One such example from the given choice is the van der waals forces.
Van der Waals forces are weak forces of attraction joining non - polar molecules together. They exist between layers of substances. They are often described as non-bonding intermolecular interaction.Definition: A one or two letter abbreviation for a chemical element.
Example: Cu is copper.
Answer:
chemical symbol
Explanation:
Everyone who is thin is in shape. A. True B. False
Answer:
false; one could be in thin shape but thay doesnt always mean they are healthy, or fit...there is always a chance there can be malnutrition or they have a good metabolism, but to be in shape, there should be a good balance of fat and muscle in the body
Answer:
False
Explanation:
A 10.0 cm³ sample of copper has a mass of 89.6 g. What is the density of copper?
Answer:
d = 8.96 g/cm³
Explanation:
Given data:
Volume of sample = 10.0 cm³
Mass of copper = 89.6 g
Density of copper = ?
Solution:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
d = 89.6 g/ 10.0 cm³
d = 8.96 g/cm³
L
shaped polygon name
Answer:
Yes, it's a hexagon, specifically a non-convex hexagon on account of having a concave angle. There's no specific official name that I'm aware of. "L-shaped hexagon" might actually be sufficient.
Explanation:
One answer is a right-angled concave hexagon, but you do need to cite some context. – Andrew Leach♦ Sep 8 '15 at 9:53. Well... since the Greek letters "gamma" and "lambda" are shaped roughly like the letter "L," you might call it "gammoid" or "lambdoid." I just invented these words.
help me please ..............
Answer:
C
Explanation:
Answer:
Hey, you have to solve it by Stichiometry.....answer is option A.... I have explained every option for your understanding.
Explanation:
(a.)**For option A, the volume of CO2 produced at STP will be 5.6 not 30.8 by solving equation for part I
By Stichiometry,
moles of CO2, n=11.2/22.4 = 0.5
Volume of CO2, V=11.2×0.5 =5.6
(b.)**For option B, the statement is correct
n(moles) of O2 =32/32 = 1 mol
we have to use stichiometry to find moles of CO2
n= 1/2 × 1 (coefficient of CO2/coefficient of O2) × mol of O2 (coz O2 is limiting reagent in 2nd option)
n= 0.5 mol
Mass= n × Molecular Mass
Mass= 0.5 × 44
Mass= 22g
(c.)**option C, is correct acc. to statement
(d.)**option D, is correct acc. to statement
(e.)**option E, is correct acc. to statement
Answer to this question is A part.
Hope it helps......
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? Molecules in both the metal and the surrounding air will start moving at lower speeds. Molecules in both the metal and the surrounding air will start moving at higher speeds. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
150 gs for me aww thanks
Explanation:
Answer:
D) The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Explanation:
Edg
Answer the question plssss
Answer: warmer because its an exothermic reaction.
Explanation: the passage states as the products form thermal energy is absorbed thermal means heat also carbon dioxide creates bubbles
How many grams are there in 1.1 x 1027 molecules of water (H2O)?
7. How many grams
(A) 1.0 x 104 grams
(B) 1.0 x 10-1 grams
(C) 3.3 x 104 grams
(D) 3.9 x 104 grams
Answer:
C) 3.3 x 104 grams
Explanation:
1 mole of water contains 6.02 × 10^23 atoms
1.1 × 10^27 atoms will contain;
1.1 × 10^27 ÷ 6.02 × 10^23
= 0.1827 × 10^( 27 - 23)
= 0.1827 × 10^(4)
= 1.827 × 10³ moles of water.
To convert mole to mass in grams, we use the formula;
mole (n) = mass (m) ÷ molar mass (MM)
Molar mas of water (H2O) = 1(2) of H + 16 of O = 18g/mol
mole = mass/molar mass
1.827 × 10³ = mass / 18
mass = 1.827 × 10³ × 18
mass = 32.886 × 10³
mass = 3.286 × 10⁴
mass = 3.3 × 10⁴ grams
How many moles of sulfur atoms are there in 5.0 g of sulfur?
Answer:
Number of moles = 0.153 mol
Explanation:
Given data:
Mass of sulfur = 5 g
Number of moles of sulfur atom = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of sulfur is 32. 065g/mol.
By putting values,
Number of moles = 5 g/ 32.06 g/mol
Number of moles = 0.153 mol
What describes the behavior of an ideal gas?
A. It’s properties at absolute zero
B. The kinetic theory of gases
C. The phase diagram of the gas
D. The ideal gas law
Answer:
The answer is D
Explanation:
for a p e x
The ideal gas law describes the behavior of gases under ideal conditions.
What is the ideal gas law?It is a law that explains that an ideal gas is considered as part of the group of theoretical gases because it is composed of point particles that move randomly and do not interact with each other.
According to classical thermodynamics, this law is a formula that allows us to relate the properties of gases, such as pressure, the volume occupied by the gas and its temperature.
Therefore, we can conclude that the ideal gas law describes the behavior of gases under ideal conditions.
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What type of reaction is Mg + Cl2 → MgCl2?
O A. Decomposition
O B. Synthesis
O C. Double-replacement
O D. Single-replacement
The reaction Mg + Cl2 → MgCl2 is a synthesis reaction. Option B
What is a synthesis reaction?
We kno0w that in a chemical reaction there is the combination of two or more substances so as to get the product of the reaction. In this case there is the combination of the magnesium and the chlorine and the product is the magnesium chloride.
In the reaction, we have two substances that have been mixed together and then we have a single product that have been formed from the two. The formation of one product means that it is a synthesis reaction.
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Select the correct answer.
In which situation is no work being done?
OA.
a person carrying a box from one place to another
B.
a person picking up a box from the ground
a person pushing a box from one place to another
Ос.
D.
a person pulling a box from one place to another
Reset
Answer:
I think it is D
Explanation:
If you pull the box your weight is doing the work not your strength.