There us no sound in the vacuum of space Why?

Answer all that are correct

A) sound must travel through something that vibrates

B) there is no energy in space

C) there is no air to vibrate in the human eardrum

Potassium has four energy levels. how many energy levels do you predict calcium, iron, nickel, and zinc will have? answer

What is created when two different reactions come together

A car traveling at a constant speed goes around a sharp curve. Is the car accelerating? Explain. Question options: No the car is not accelerating because it didn't change speeds.

An acid-base indicator is used in what type of reaction?

If I have 9 moles of a gas at a pressure of 8.7 atm and a volume of 18 liters, what is the temperature?

A mixture of 0.438 M H2, 0.444 M I2, and 0.895 M HI is enclosed in a vessel and heated to 430 °C. H2 (g) + I2 (g) 2 HI (g) Kc = 54.3 at 430∘C Calculate the equilibrium concentrations of each gas at 430∘C.

Why is the atmospheric pressure lower on a high mountain peak than at sea level

What is the mole ratio of N2 + 3H2 Right arrow. 2NH3

In a second-order reaction (one that is second order in one reactant), cutting in half the concentration of that reactant will have what effect on the reaction rate? A) The reaction rate will remain the same. B) The reaction rate will double.

How many moles of nitrogen gas are in a 10.0 L container at STP? a. 0.45 moles b. 22.4 moles c. 10.0 moles d. 6.02 x 1023 moles