What is the preferred electrical charge of a Sodium ion? O a. + 1 O O O b. + 2 Oco O O d.-1 O e. 2 O

What is a chemical solution and what are the names of its components?

Which element is a metalloid? a. argon (ar) b. silicon (si) c. potassium (k) d. magnesium (mg) ?

A 10.0 g ice cube is placed into 250 g of water with an initial temperature of 20.0 C. If the water drops to a temperature of 16.8 C, has a specific heat of 4.18 J/g*K, what is the enthalpy of fusion of the ice.

5. How is a cell wall different from a cell membrane?

If both gases are at the same temperature, which one has the greater pressure? gas 1 because the particles are moving much faster gas 1 because it has fewer particles that are close together gas 2 because it has more particles that are colliding gas

What's the ratio of 80% hydrogen

Why is warmer near earth surface

A platinum wedding band contains 0.077 mol of platinum. How many atoms of platinum are in the 15-gram platinum wedding band?

In an ecosystem where 500,000 kcal of sunlight is available for producers, approximately how much chemical energy will be contained in secondary consumers?

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg