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The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H2O) and O2 gas. Which coefficients would be placed in front of water and oxygen?
2 in front of water and 1 in front of oxygen
Kiley wants to balance the equation H2 + N2 → NH3. Which would be her first step in balancing an equation?
NOT adding the coefficient 3 in front of H2 and the coefficient 2 in front of NH3
Which is the balanced equation for V2O5 + CaS → CaO + V2S5?
V2O5 + 5CaS → 5CaO + V2S5
One half of a balanced chemical equation is shown.
3Mg(OH)2 + 2H3PO4
Which lists the numbers of each atom the other half of the equation would contain?
3 Mg, 2 P, 14 O, 12 H
Substances A and B react in a ratio of A + B → AB. Colin was combining substance A and substance B to form substance AB. He added 10 g of substance A and 45 g of substance B.
How much of substance AB would Colin make?
55g
Lana balanced an equation so that the result was 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr. Which most likely represents the starting equation?
NOT 2C4H3Br + 5O2 → 4CO2 + 2H2O + 2HBr
NOT C4H3Br + O2 → CO2 + H2O + HBr
Which best describes the law of conservation of mass?
The mass of the reactants and products is equal and is not dependent on the physical state of the substances.
Put 2 in front of water and 1 in front of oxygen.
- 2 coefficient in front of water and 1 in front of oxygen in order to equal the amount of oxygen at both sides i.e. reactant and product.
- There are four oxygen atoms present at the side of reactant whereas 3 atoms of oxygen is present at the side of product.
- If we want to equal the amount of atoms at both sides we have to put coefficient 2 with water which have one oxygen atom.
- Whereas put coefficient 1 with oxygen molecule which have already 2 oxygen atoms so we can conclude that we have to put 2 in front of water and 1 in front of oxygen.
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