How to calculate the energy absorbed by ice melting

2NO (g) + O2 (g) - - > 2NO2 How many grams of NO are required to react fully with 5.00 mol of O2? A. 75.0 g B. 1.41 g C. 300. g D. 460. g

A boy pulls a wagon with a force of 6 N east as another boy pushes it with a force of 4 N east. what is the net force?

Chlorine gas was first prepared in 1774 by the oxidation of NaCl with MnO2: 2NaCl (s) + 2H2SO4 (l) + MnO2 (s) →Na2SO4 (s) + MnSO4 (s) + 2H2O (g) + Cl2 (g) Assume that the gas produced is saturated with water vapor at a partial pressure of 28.

An atom has a mass number of 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.

What is the simplest formula for a compound containing 0.50 mol na, 0.50 mol s, and 0.75 mol o?

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.

One mole of which hydrocarbon requires 8 mol o2 to achieve complete combustion to give carbon dioxide and water?

How many bromine atoms are present in 39.9 g of CH2Br2