How do you calculate the atomic mass number?

Solid magnesium carbonate (mgco3) and solid sodium nitrate were mixed, placed in water, and stirred. what is observed? 1. mgco3 and nano3 will not dissolve. 2. mgco3 and nano3 will dissolve. 3. mgco3 will remain undissolved and nano3 will dissolve.

One mole of propane (44 grams) reacts with 5 moles of oxygen to produce 2220 kJ of heat. How many grams of propane would produce 6660 kJ of heat? A. 220 g B. 132 g C. 4440 g D. 49 g

How would global warming change the water cycle and the climate around bodies of water, like oceans and lakes? A) Warmer temperatures would cause in a drier, hotter climate. B) Warmer temperatures would cause more precipitation and less run-off.

How do hydrocarbons differ in structure from carbohydrates.

What is true about both sodium and gold? A. They are metals. B. They are very reactive. C. They are volatile. D. They are in the same group.

Prokaryotes that can cause diseases are in what domain

This metal is very reactive, has properties similar to magnesium, and is in the same period as bromine. What element is this?

Name two ways that living things use proteins

Solid lithium metal and diatomic fluorine gas react spontaneously to form a solid product. give the balanced chemical equation (including phases) that describes this reaction.

What is the best way to transform a chemical potential energy into internal kinetic energy?