Which statement describes a physical property of copper?
it reacts with strong acids.
it can be reshaped by a force.
it ignites at high temperatures.
it can combine with oxygen.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?