What are minerals called that carry a positive or negative charge and must be carefully balanced for the body to function in a healthy state?

Cells are not as large as this cause. Explain why in terms of a cells surface area to volume ratio.

What is the ph of an aqueous solution at 25.0 °c that contains 3.98 ⋅ 10-9 m hydronium ion? what is the ph of an aqueous solution at 25.0 °c that contains 3.98 10-9 m hydronium ion? 5.600 9.000 8.400 7.000 3.980?

Which of the following describe (s) the changes, on a molecular level, when a solid melts? Select one: a. The molecules become more widely separated. b. The molecules acquire greater freedom of motion. c.

Describe what the specific heat capacity (c) tells us about a substance. * Your answer

What is the most abundant gas in Earth's present day atmosphere? methane oxygen carbon dioxide nitrogen

Wasser and water are examples of cognates. True or False

Write the net ionic equation, including the phases. 2hbr (aq) + ba (oh) 2 (aq) - - - > 2h2o (l) + babr2 (aq)

A student needs to prepare 50.0 mL of a 1.30 M aqueous H2O2 solution. Calculate the volume of 5.0 M H2O2 stock solution that should be used to prepare the solution.

Which of the following is the best name for a compound made from nitrogen and oxygen? (N2O3) nitrogen oxide nitrogen II oxide nitrogen trioxide dinitrogen trioxide

Write the element symbol for the element with the abbreviated electron configuration [ne]3s23p2.