A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the normal force?

A. 480 N down

B. 480 N up

C. 2300 N down

D. 2300 N up

The change in enthalpy is the change in heat energy of a reaction and is calculated by (Hint: Hess' Law) : Group of answer choices a. Sum of reactant enthalpies plus the sum of product enthalpies b.

Pat pours cold, liquid cream into a cup of hot coffee. Which of the following describes how the hot coffee and cold cream will interact? A) The cold cream will drop to the bottom of the cup. When it warms, some of it will rise back to the surface.

Given 4.8 moles of a gas in a 1.8 L container, if the temperature is found to be 31 degrees Celsius, what is the pressure of the gas? (The ideal gas constant is 0.0821 L · atm/mol · K and 1 atm = 760 torr.) 6.79 torr 66.55 torr 6.79 x 100 atm 6.

If you spill 4.13 moles of water, H20, how many moles are in the puddle?

75 mL of water is added to a 360 mL solution of acetic acid with a concentration of 0.87 M. Determine the molarity of the new solution.

Which statement best describes the direction of heat flow by conduction between two samples of the same material? 1. Heat flows from faster molecules to slower molecules when they are near. 2.

Delta H equals 98.8 KJ, and Delta S equals 141.5 J/K. Is this reaction spontaneous or nonspontaneous at high and low pressure

Secondary consumers are eaten by?

What happens to atomic radius down a group?

The study of aquatic plants Oceanography or Biology?