The respiratory system is responsible for the exchange of oxygen with which gas?

A. Nitrogen

B. Water vapor

C. Hydrogen

D. Carbon dioxide

You have two 500.0 ml aqueous solutions. solution a is a solution of a metal nitrate that is 8.246% nitrogen by mass the ionic compound in solution b consists of potassium, chromium, and oxygen;

Which statement best describes the lattice structure of solid sodium chloride? A. Each sodium ion is surrounded by one chloride ion. B. Each chloride ion is surrounded by two sodium ions. C. Each chloride ion is surrounded by four sodium ions. D.

At 40°c, the ion-product constant of water, kw, is 2.88*10-14. what is the ph of pure water at 40°c?

A unicellular organism has how many cells? O two O many O one O three

How many grams of ZnO would you need to produce 50 g of ZnCl2? (The atomic mass of Zn is 65.38 and of Cl is 35.45.) ZnO (s) + 2HCl (aq) → ZnCl2 (s) + H2O (l) 17.1 g 29.8 g 59.7 g 83.8 g

What is the mass of a box of nails

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A.

Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium. Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy

How many Joules are equivalent to 75 Calories?

How do you balance nuclear equations?