An element has an atmomic number of 68. The number of protons and electron in a neutral atom of the element are?

A 0.3146-g sample of a mixture of nacl (s) and kbr (s) was dissolved in water. The resulting solution required 45.30 ml of 0.08765 m agno3 (aq) to precipitate the cl - (aq) and br - (aq) as agcl (s) and agbr (s).

What is true of all particles of gas enclosed within a container? They move at different speeds. They have the same kinetic energy. They never collide with each other.

The molar solubility of ba3 (po4) 2 is 8.89 x 10-9 m in pure water. calculate the ksp for ba3 (po4) 2. the molar solubility of ba3 (po4) 2 is 8.89 x 10-9 m in pure water. calculate the ksp for ba3 (po4) 2. 5.55 x 10-41 5.33 x 10-37 8.16 x 10-31 6.

Planet A has a tilt of five degrees. What seasonal changes would be expected on this planet? Extreme temperature changes between seasons Little to no change in temperatures between seasons Seasonal changes along the equator only Seasonal changes at

Explain how a chemical formula is used to represent a chemical compound.

What is hydrocarbon?

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m