How many protons are in Cesium-135 (Cs) ? 35, 55, 80, 195

In which example is matter changing state? A. heating a pan of water until the water is all gone B. putting a soft drink can in the refrigerator to cool it C. heating soup on the stove until it is hot to your tongue D.

What is the chemical formula for the chemical magnesium nitride?

Which ball has more Potential energy a beach ball or bowling ball AND WHY

What is the mass of a magnesium block that measures 2.5cm x 3.5cm x 1.5cm

What do all nickel atoms have in common

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.

A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.

10) A screwdriver has the density of 5.5 grams per cubic centimeter. It also has the mass of 2.3 grams. What is the screwdriver's volume?

A chemist weighed out 20.7 g of sodium. Calculate the number of moles of sodium she weighed out

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.