If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

At approximately what temperature can helium fusion occur?

Calculate the number of grams contained in each of the following number of moles. Report your answer with the appropriate number of significant figures. a. 0.410 mol of NaCl (sodium chloride) b. 4.80 mol of C2H4 (ethylene)

A 110.-g sample of copper (specific heat capacity 0.20 J/C g) is heated to 82.4C and then placed in a container of water at 22.3C. The final temperature of the water and copper is 24.9C.

Which element will most likely form covalent bonds with fluorine? f carbon g tin h potassium j neon?

Looters break a statue into pieces. How do you expect the weathering of pieces of rock to change?

A solution is made by dissolving 25.20 g of aluminum acetate in 185.0 mL of water. What is the concentration of acetate ions?

Which best describes how sediment forms? erosion breaks down rock and other material molten rock cools above earths surface loose material is cemented by pressure chemical changes cause sediment to compact together

How will you know whether a solution is saturated or supersaturated?

What is the number of moles of 27.6g of lithium?

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.