A sample of hydrogen gas is placed in a 0.500 L container at 295K. The gas pressure is 1.442 bar. How many moles of H2 gas are in the container.

How much heat is needed to melt 45.00 g of ice at 0°C if the latent heat of fusion of water is 333.7 J/g? 288.7 J 378.7 J 14,220 J 15,020 J

After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of 38 percent. The correct value for the percentage of water in the hydrate is 51 percent.

Which material is the least likely to be recognized as a mixture by looking at it under a microscope? a suspension a colloid a homogeneous mixture a heterogeneous mixture

Which change of state involves a release of energy? a) boiling c) condensation d) melting e) sublimation

Which surface exhibits the highest albedo measurement A. sand B. forest cover C. bare soil D. fresh snow

To determine the moles of ammonium chloride produced, we need to find the limiting reactant. H2O is present in an unlimited amount, so it cannot be the limiting reactant. Let's then determine the amount of each remaining reactant present (in moles).

Which of the following is a precipitation reaction? a. 2 LiI (aq) + Hg2 (NO3) 2 (aq) →Hg2I2 (s) + 2 LiNO3 (aq) b. NaCl (aq) + LiI (aq) → NaI (aq) + LiCl (aq) c. HCl (aq) + KOH (aq) → KCl (aq) + H2O (l) d.

How many outmost electrons do lithium and potassium have

Which of the following is a heterogeneous mixture Air Salt water Steel Soil I think it's soil but I'm not positive

When 40.5 g of Al and 212.7 g of Cl2 combine in the reaction: 2 Al (s) + 3 Cl2 (g) - -> 2 AlCl3 (s) b) How many moles of AlCl3 are formed?