What are all the different types of chemical change?

How many valence electrons does magnesium (Mg) have? (A) 12 (B) 6 (C) 3 (D) 2

Which statement is true for all minerals? A. They have a crystalline structure. B. They contain useful metals. C. They are made of silicon and oxygen. D. They are too hard to be scratched with a nail.

A ball has a volume of 9.0 liters and is subjected to a pressure of 3.5 atmospheres when its temperature is 74 °C. According to the ideal gas law, how many moles of gas are in the ball?

Which of the following reveals a pattern observed by scientists

Which of these is an example of plants depending on animals? A. Flowering plants are pollinated when bees and other insects move around in the flowers. B. Burrs are seeds from a plant that are dispersed by getting stuck to the fur of animals. C.

Given the molar specific heat cv of a gas at constant volume, you can determine the number of degrees of freedom s that are energetically accessible. for example, at room temperature cis-2-butene, c4h8, has molar specific heat cv=70.6jmol⋅k.

A 10.0-L rigid container holds 3.00 mol H2 gas at a pressure of 4.50 atm. What is the temperature of the gas?

Why do noble gases have the least amount of electronegativity?

In what layer of the skin is melanin found? What does melanin do for skin cells?

An exothermic reaction?