The molar mass of O2 is 32.00 g/mol. How many moles of HgO are needed to produce 250.0 g of O2?

How much Potassium Nitrate do I need to make 21g of Nitric Acid?

Two chlorides on the carbon of a methane unit are called: (choose one) -methyl chloride -dichloromethane -chloroform -carbon tetrachloride

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)

Which of the following is a reasonable ground-state electron configuration? A. 1s^2 2s^2 2p^6 3s^2 B. 1s^2 2s^2 2p^6 3s^2 3d^4 C. 1s^2 2s^2 2d^10 2p^3 D. 1s^2 2s^s 2p^3 2d^6

The empirical formula for acetylene is CH, and it's molar mass is 26.04. What is the molecular formula?

Classify each substance as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound. If it is a mixture, classify it as homogeneous or heterogeneous. a. Sweat b. Carbon dioxide c. Aluminum d. Vegetable soup

Which describes energy changes during nuclear fission? A very large amount of energy is produced from a tremendous mass. EEUU A very large amount of energy is produced from a very small mass. G .

For 2H2 + O2 → 2H2O: 4 moles of H2 will react with moles of O2 to produce moles of H2O

Rutherford's experiment showed that subatomic particles a. are the same size and shape as the atom. b. don't take up most of the space in an atom. c. all have similar sizes and characteristics. d. do not influence the behavior of an atom.

Why are electrolytes important in your body? Do you need to drink Gatorade to get them?