20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from

25° C to 20° C, how much heat energy (Q) moves from the water to the

surroundings?

418 Joules

4.18 J

209 J

83 J

Oxygen, nitrogen, and fluorine bond with hydrogen to form molecules. These molecules are attracted to each other by 1. ionic bonds 2. hydrogen bonds 3. electrovalent bonds 4 coordinate covalent bonds

A small block has a volume of 15 mL and a mass of 30g. What is its density?

At what ph did you see the highest activity of salivary amylase

The atomic mass of an element is equal to the number of: protons protons plus neutrons protons plus electrons neutrons

Who discovered Oxygen element

Determine the number of atoms in 1.75 ml of mercury. (the density of mercury is 13.5 g/ml.)

In the reaction A + B + C >> D, what are the products? A. C and D B. A and B C. A, B, C, and D D. A and C

Which of the following is true of a person with a high credit score?

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?