Calculate the number of moles of Zn (NO3) 2 in 131.50 g of this substance. Note that the formula weight of Zn (NO3) 2 is 189.40 amu.

What is the dependent variable for," does a covered pot boil faster with the lid on or off

Sam follows the directions on a box of pancake mix. The box says that it makes 10 pancakes, but he is able to make 8 pancakes from the ingredients. In this case, the number 10 represents which type of yield?

Why are older parts of the ocean floor no older than about 200 million years?

The enthalpy of a reaction is + 270 kJ/mol. What can you determine about the reaction? O A. It is spontaneous. O B. It is endothermic. O C. It is nonspontaneous. O D. It is exothermic.

The initial volume of a gas at a pressure of 3.2 atm is 2.9 L. What will the volume be if the pressure is increased to 4.0 atm?

The two forms of oxygen, O2 (g) and O3 (g), have (1) different molecular structures and identical properties (2) different molecular structures and different properties (3) identical molecular structures and identical properties (4) identical

What is the difference between a distraction and a reaction

if carbon which has an electrongavity of 2.5 bonds with hydrogen, which has an electrongavity of 2.1, the bond between the two atoms will be classified as a (n) covalent bond

If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products? A. 12 atoms of carbon (C) B. 6 atoms of carbon (C) C. 3 atoms of carbon (C) D. 2 atoms of carbon (C)

Car Q and z are put though an endurance test to see if they can travel at 120 km/h for 5.0 hours. Each car has a 45-L fuel tank. Car z must stop to refuel after traveling for 4.2 hours. Car Q, however, travels for 5.4 hours before running out of gas.