An atom had a mass of 43 and it also has has 21 electrons

General term for substances formed when metals and nonmetals combine

How long does it take me to travel 500 m E at a velocity of 50 m/s E? A. 15 s E B. 10 s E C. 10 s D. 15 s

how does the speed of visible light compare to the speed of gamma rays, when both speeds are measured in vacuum

What diagnostic test differentiates proteus and providencia species from other enterobacteriaceae?

2.15 g of an unknown gas at 71 degrees C and 1.10 atm is stored in a 1.75 L flask. Solve for the density and the molar mass of the gas.

Select the type of energy involved in each step. You turn on the burner of a gas stove. a) chemical b) thermal c) mechanical d) electrical The gas ignites. a) chemical b) thermal c) mechanical d) electrical The gas warms the water in the pan.

What volume of 0.500 M AgNO3 are needed to react with 100. mL of 0.400 M K2CrO4? 2 AgNO3 (aq) + K2CrO4 (aq) ➔ Ag2CrO4 (s) + 2 KNO3 (aq)

Why can gases and liquids both transmit heat by convection? a. Their particles are free to move away from each other b. They both have a fixed volume c. They both contain charged particles d. Their particles both vibrate around fixed positions

How many atoms of oxygen, O, are in 0.0595 moles of water?

Calcium chloride contains calcium and chloride ions. write the ground-state electron configuration for the chlorine ion.