If it takes 450 J of energy to melt 5 g of a substance, how many joules would be needed to melt 15 g?

A. 9000 J

B. 6750 J

C. 2250 J

D. 1350 J

Identify the compound where the groups are axial and equatorial. trans-1,4-dibromocyclohexane cis-1,4-dibromocyclohexane cis-1,3-dibromocyclohexane trans-1,2-dibromocyclohexane none of them

Which of the following atoms should have the greatest polarizability? F Br Po Pb He

How do metals and nonmetals differ in terms of how they lose/gain electrons?

Determine the number of representative particles in each of the following. 0.264 mol silver 7.95 * 10^-3 mol sodium chloride 44.4 mol carbon dioxide 0.352 mol nitrogen (N2)

Which ion below is present in greatest concentration in a basic (alkaline) solution

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.