A student has a sample of a white powdery substance. She needs to know if it is an ionic compound or a molecular compound. Describe a method she could use to determine what kind of compound the substance is.

The molar mass of lif is 25.94 g/mol. how many moles of lif are present in 10.37 g?

Which practice may be considered unethical To some but prevents unnecessary human harm

In terms of disorder and energy, systems in nature have a tendency to undergo changes toward less disorder and lower energy less disorder and higher energy greater disorder and lower energy greater disorder and higher energy

Compound A is an organic compound which contains Carbon, Hydrogen and Oxygen. When 0.240g of the vapour of A is slowly passed over a large quantity of heated Copper (II) oxide, CuO, the compound A is completely oxidized to carbon dioxide and water.

Which of the following is a constant for 1 mole of any ideal gas

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.