Chemistry, 17.12.2019 00:31 christinasmith9633
Changes in state are called phase changes. a phase change is a change from one physical state (gas, liquid, or solid) to another. the amount of energy necessary to melt 1 mole of any solid is called its enthalpy of fusion. the amount of energy necessary to vaporize 1 g of any substance is called its enthalpy of vaporization. the enthalpy of fusion of solid sodium is 2.60 kj/mol. calculate the energy required to melt 43.6 g of solid sodium.
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Chemistry, 21.06.2019 17:00
What were the success and failures that came to boyle’s excitements?
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Chemistry, 22.06.2019 13:00
One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.
Answers: 1
Chemistry, 22.06.2019 16:00
What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided
Answers: 2
Chemistry, 22.06.2019 18:00
Which three statements represent the benefits of performing experiments using computer simulations?
Answers: 2
Changes in state are called phase changes. a phase change is a change from one physical state (gas,...
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