What is the mass of 18.8 moles of helium (He) atoms?

0.213 g

4.70 g

37.6 g

75.2 g

How much heat is added if 0.2706g of water increases in temperature by 0.216 degree C?

Compare and contrast instantaneous speed and constant speed

Haber was able to manufacture large amounts of ammonia, what do plants convert ammonia into? Hydrogen Nitrate Oxygen Carbon Dioxide

What is the common name of this chemical family

What volume (in L) of a 6.84 M. sodium bromide (NaBr) solution would be needed to make 588 mL of a 1.84 M solution by dilution?

Where do most carbon monoxide emissions come from?

The osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant RSuppose the osmotic pressure of a certain solution is measured to be 22. atm at an absolute temperature of 353.

Which one of the following is a redox reaction?. 2 Na (g) + Cl2 (g) 2 NaCl (s) A. K2Cr2O7 (aq) + 2 KOH (aq) 2 K2CrO4 (aq) + H2O (l) B. H2O (l) H + (aq) + OH - (aq) C. Na2CO3 (s) + 2 HCl (aq) 2 NaCl (aq) + CO2 (g) + H2O (l) D.

Name 4 common chemical properties of matter

Why is photosynthesis so important to plants, and can't animals use it?