Distinguish a substance from a mixture. give two examples of each

At constant pressure, as the volume of a fixed mass of gas decreases, the temperature will

What is a physical property of toothpaste

What is the instrument which is commonly used to measure the intensity of radioactivity is called

What is the relationship between the direction of oscillation of an electromagnet wave and it's direction of travel?

12. The number of protons and neutrons tells us: | a. The principle quantum number b. The reactivity of the element e C. The atomic mass d. The atomic number . Both a and c

What is the ratio of Fe+3 ions to O2 - ions in a neutral compound? a. 1:2 b. 2:1 c. 2:3 d. 3:2

What is the specific heat capacity of a 17.5g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C?

How can equilibrium of a closed system chemical reaction be disturbed? Select all that apply. Adding or removing products or reactants. Keeping the concentration of products and reactants the same. Keeping the temperature of the system constant.

Why does an exothermic reaction need activation energy?

The temperature of 15 grams of water increases by 3.0 degress. how much heat was absorbed by water?