Describing Chemical Reactions "content recovery"

Leslie incorrectly balances an equation as 2C4H10 + 12O2 → 8CO2 + 10H2O. Which coefficient should she change?

12

In a process called photosynthesis, plants use carbon dioxide and water, along with energy from sunlight, to produce sugar and oxygen. Photosynthesis is represented by the equation What must a plant need to produce 4 molecules of sugar?

24 molecules of H2O

Which additional product balances the reaction H2SO4 + 2NaOH → Na2SO4 + ________?

2H2O

The product side of a chemical reaction is shown. → 7Ti2(SO4)3

7

Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl?

Fe2O3 + 6 HCl → 2 FeCl3 + 3 H2O

Rust results from iron's reaction to oxygen. An iron nail gains mass when it rusts. How does this reaction support the law of conservation of mass?

The mass of the rusted nail equals the mass of iron and the oxygen from the air it reacted with to form the rust.

In the product 6O2, what does the coefficient mean?

There are 6 molecules of O2.

Liquid 1 reacts with Liquid 2, producing a solid and a gas. Using this scenario, which supports the law of conservation of mass?

mass of Liquid 1 + mass of Liquid 2 = mass of solid + mass of gas

Which best represents the law of conservation of mass?

mass of reactants = mass of products

Cecil writes the equation for the reaction of hydrogen and oxygen below. H2 + O2 → H2O Why does his teacher ask him to balance the equation by including the correct coefficients?

to show that atoms are conserved in chemical reactions