Which mass is easily forgotten about when trying to prove the law of conservation of mass in a chemical reaction.

1water

2salt

3gas

4rock

What percent of the human body is water

Calculate the density (in g/l) of ch4 (g) at 75 c and 2.1 atm. (r = 0.08206 latm/molk

Is H2Se a Brønsted-Lowry base?

What is the oxidation number of the element n in the compound n2o5? 1. 3 2. 6 3. 5 4. 2 5. - 6 6. 4 7. - 2 8. - 3 9. - 5 10. - 4?

Which physical property of matter can be expressed numerically in SI units?

Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?

Nonrenewable resources are?

Watch the animation, then check off the samples that will conduct electricity. Check all that apply. View Available Hint (s) Check all that apply. NaCl solution Solid NaCl Solid sugar Sugar solution

Burning wood represents a chemical change. True or False?

Why are phosphates in laundry detergent