What is the meaning of semipermeability?

What happens when you mix an aqueous solution of sodium nitrate with an aqueous solution of barium chloride?

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

You test the pH of the kiddie pools water. You discover thats its pH is 6.3. Is the water too acidic or too basic? how could this pH harm the kiddie pool and the people in it?

A sample of gas has a volume of 5.58 l at a pressure of 715 mm hg. what is the volume of the gas when the pressure of the gas is increased to 755 mm hg?

Mendeleev organized the elements a. alphabetically by name. b. by the number of electrons. c. by increasing the atomic number and similar properties. d. by increasing atomic weight and similar properties.

Balance the following chemical equation. Mg + N2 → Mg3N2 A. 3 Mg + N2 → Mg3N2 B. 3 Mg + 2 N2 → Mg3N2 C. 6 Mg + 2 N2 → 3 Mg3N2 D. Mg + N2 → Mg3N2

Which of the following correctly categorizes the following infectious agents? 1. Viruses-living; bacteria-living 2. Viruses-nonliving; bacteria-nonliving (this answer choice is wrong) 3. Bacteria-nonliving; viruses-living 4.

A student wants to compare how easily a metal and a plastic spoon of the same temperature can transfer thermal energy. Which of the following activities should the student perform? Measure the effort required to bend each spoon.

What is the molar mass of a compound?

an element has an isotope with a mass of 203.973 amu and and abundance of 1.40%. another isotope has a mass of 205.9745 amu with an abundance of 24.10%. a third isotope weighs 206.9745 amu and is 22.10%, and the fourth isotope weighs 207.