What is the percent composition by mass of nitrogen in NH4NO3 (gram-formula mass = 80.0 grams/mole) ?

(1) 17.5% (3) 52.5%

(2) 35.0% (4) 60.0%

Calculate the molar mass of K3PO4

What is the mass in grams of one mole of any substance know as

What does the oxidation state tell you about elements and the element valence electrons?

Write the balance equation for dehydration of cyclohexanol

0.249 g of a common diatomic gas occupies a volume of 250. ml at 120°c and 760 mmhg. using a periodic table, what is the identity of this element?

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.