If 3.0 grams of strontium-90 in a rock sample remained in 1989, approximately how many grams of strontium-90 were present in the original rock sample in 1933?

How do forces between particles in solids compare to forces in the other states of matter? O A. The forces in solids are stronger than forces in liquids and gases. O B. The forces in solids are weaker than forces in liquids and gases. O C.

How many electron dot structure does phosphorus have?

If 4.8 moles of X and 3.4 moles of Y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3X + 2Y "yields" / X3Y2 1.7 mol Y left over 1.6 mol X left over 0.2 mol Y left over 0.

Where are coefficients located

Which of the following is not true regarding a properly written chemical reaction

What is the relationship between law of conservation and chemical reaction?

How quickly must non-frozen ready-to-eat foods be consumed? 24 hours . 48 hours . 3 days . 7 days

I need a essay on what I learned in chemistry

1. What is the relationship between temperature and pressure of a gas in a closed system? 2. What is the relationship between the pressure and volume of a gas at a constant temperature

An atom of aluminum has an atomic number of 13 and a mass number of 27. How many neutrons does it have?