For an object to remain at rest, which of the following must be true?

The forces on it are balanced

There is not friction

Gravity does not act on it

The onject has no mass

What volume does 43.5 g of n2 occupy at stp? (r = 0.08206 l⋅atm/mol⋅k) ?

Which of the following starts to break down as soon as they enter the mouth? carbohydrates proteins fats nucleic acids

What are the two general concepts involved in equilibrium? Check all that apply. 1 sameness 2 rate constant 3 mass difference 4 changelessness

Atoms that have a full outer level combine with other atoms. Is this true or false

A water sample tested positive for lead with a concentration of 35 ppm. The density of the solution is 1.00 g/mL Which of the following statements is correct? A. 100 g of the solution contains 35 g of lead B. there are 35 mg of lead in 1.

When an ionic bond forms, which part (s) of the atoms are directly involved?

When a 3.00 g 3.00 g sample of KBr KBr is dissolved in water in a calorimeter that has a total heat capacity of 1.36 kJ ⋅ K - 1, 1.36 kJ⋅K-1, the temperature decreases by 0.370 K. 0.370 K. Calculate the molar heat of solution of KBr. KBr.

How many moles of oxygen are required to fully react with 100 kg of lead sulfide?

Predict the electronegativity of the yet undiscovered element with Z = 119.

3.15 g of an unknown gas at 35 °C and 1.10 atm is stored in a 1.85-L flask. What is the density of the gas? what is the molar mass of the gas?