According to the law of conservation of mass, in a chemical reaction the total mass of reactants:

For the endothermic reaction A → B with ΔH = +125 kJ, which statement is TRUE?

Which compound is held together primarily by ionic bonds?

A compound with 40.0% C, 6.7% H, and 53.3% O has a molar mass of 120.1 g/mol. The molecular formula is:

In the reaction Fe + Cl₂ → FeCl₃, the balanced equation is:

Which of the following is a balanced equation?

A syringe contains gas at 760 mmHg in a 1.00 L chamber. If the plunger is pushed to 500. mL while the temperature remains constant, what is the new pressure?

The molar mass of a compound is 180 g/mol, and its empirical formula is CH₂O (30.0 g/mol). The molecular formula is:

The Lewis structure of N₂ contains:

A patient has the following blood gas results: pH=7.36, PaCO2= 50, PaO2 = 75, Hb = 13, FIO2 = .21, HCO3 = 29, SaO2 = 93%, PECO2 = 45, VT = 200 ml, f = 32. What is the patient’s VD/VT?