At the center of every atom lies a small, dense _ that is positively charged.

Given the partial equation? MnO4-+? SO32 - →? Mn2++? SO42 - what must the coefficients be so that the electrons are balanced? Enter the equation coefficients in order separated by commas (e. g.

Put the following molecules in order from least kinetic energy to greatest Cool water Frozen water Warm water Water vapor

Calculate the number of calories in a food product that has 14g of fat, 20g of carbohydrates and 4g of protein.

A substance has a density of 4.5gmL. What is this in kgL? Report your answer with two significant figures.

Ron wants to install an energy efficient and long lasting device for lighting in his new home. Which device should he use?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension

If a catalyst is used in a reaction: a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.