What are some human activities that could have influenced CO2 levels in this period?

What are the correct coefficients when this equation is balanced? K + Br2 KBr

If a small amount of zinc remains at the conclusion of a reaction between zinc and hydrochloric acid, which reactant is in excess? A. zinc B. neither C. hydrochloric acid D. can't tell

Which balanced equation represents a redox reaction? a. AgNO3 (aq) + NaCl (aq) →AgCl (s) + NaNO3 (aq) b. H2CO3 (aq) →H2O () + CO2 (g) c. NaOH (aq) + HCl (aq) →NaCl (aq) + H2O () d.

Martina has a sample of an unknown substance, she measures the substance, its mass is 13.5 grams, and its volume is 5cm^3 which metal might her sample be made of? silver density: 10.49 g/cm^3 copper density: 8.96 gm/cm^3 iron density: 7.

According to daltons atomic theory all Adams of the same element are identical today this theory is directly refuted by the discovery of isotopes.

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.

In the formula for the compound xcl4 the x could represent