If the bond enthalpy for a C-H bond is 413 kJ, what will happen when the C-H bond is broken

As a star gives off energy in a thermonuclear reaction, the mass of the star 1. decreases 2. increases 3. remains the same

Why is this reaction considered to be exothermic? a Because energy difference A is greater than energy difference C. b Because energy difference A and energy difference C are about equal.

Formed when chemicals in the air get into rain and up the acidity levels

For the reaction PCl5 (g) + heat PCl3 (g) + Cl2 (g), what will happen when the volume is increased? A. There will not be a shift in equilibrium. B. There will be a shift toward the products. C. There will be a shift toward the reactants. D.

In the reaction mg (s) + 2hcl (aq) →mgcl2 (aq) + h2 (g) + MgCl2 (aq) how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCI in an excess of Mg

When is alpha particle emission most likely to occur? A. When the nucleus has more than 83 protons. B. When the ratio of neutrons to protons in the nucleus is too high to be stable. C. When the nucleus has a mass of more than 83 amu. D.

Researchers used a combustion method to analyze a compound used as an antiknock additive in gasoline. A 9.394 mg sample of the compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in the combustion.

The formula for binary ionic compound formed between cesium and fluorine

If the mass of a material is 76 grams and the volume of the material is 16 cm3, what would the density of the material be? g/cm3

Calculate the specific heat of a metallic element if 50.0 g of the metal need 314 joules of heat energy to raise the temperature from 25°C to 50°C.