A saline solution with a mass of 400 g has 30g of NaCl dissolved in it what is the mass/mass percent concentration of the solution?

How many atoms of he gas are present in a 450 ml container at 35°c and 740 mmhg?

What should happen when a piece of copper is placed in 1m hcl? a. the copper is dissolved by the acid. b. the copper is dissolved by the acid with the release of hydrogen gas. c. the copper bursts into greenish flames. d. nothing happens?

A 6 l volume of ideal neon gas (monatomic) is at a pressure of 3.2 atmospheres and a temperature of 310 k. the atomic mass of neon is 20.2 g/mol. in this situation, the temperature of the gas is increased to 410 and the volume is increased to 8.0 l.

Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. what is the molar concentration of h3o + in a cola that has a ph of 2.670

Design an experiment to collect data that supports the claim that a 1.0M NaCl solution is a homogenous mixture.

What type of radiation wave from the Sun does this graphic display? answer choices: x rays microwave visible ray infrared ray

What is the charge associated with each side of the HCl molecule?

Neon is a gas made up of one type of atom. Which term best describes neon? A) molecule B) element C) compound D) mixture

When the liquid is poured through a fliter,

A student went to the dentist and found out that he had a cavity. He always brushes his teeth twice a day, so he didn't understand how he got a cavity.