Can endothermic chemical reactions be spontaneous?

Describe at least two ways that carbon can get from seashells to the atmosphere

Gene therapy is a process whereby normal genes are injected to replace abnormal genes. T or F

Manganese dioxide (MnO2 (s), Hf = - 520.0 kJ) reacts with aluminum to form aluminum oxide (AI2O3 (s), Hf = - 1699.8 kJ/mol) and manganese according to the equation below. What is the enthalpy of the reaction?

A body, upon heating, becomes red first, then yellow, and then other colors. Why? A - Red light has the lowest frequency B - Yellow light has the lowest frequency C - Red light has the highest frequency D - None of the above

Manganese nodules are an example of A. Terrigenous sediment B. Biogenous sediment C. Hydrogenous sediment D. Oil products

State the relationship between the number of electrons in a carbon-nitrogen bond and carbon-nitrogen bond energy

What are the characteristics of bones?

If 294 grams of FeS2 is allowed ti react with 176 grams of O2 according to the following equation how many grams of Fe2O3 are produced? FeS2 + O2 = Fe2O3 + SO2

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?