Is Mg+2 an atom or ion? + 2 and atom or an ion

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an integrating center? A. sensor B. effector C. stimulus D. response

Find the molarity of a 40.0 % by mass aqueous solution of sulphuric acid H2SO4 for which the density is 1.3057 g/ml

Will xenon react with nitrogen?

Assume that in each pair of compounds be - low the type of crystal structure is similar. Consider the strength of the attractive force bonding the ions together in each compound. In which case would the relative strengths be ranked correctly? 1.

Compare and contrast the sizes of protons neutrons and electrons.

How many sugar molecules are in a 3 M sugar solution (V=1L) ?

You have two solutions, both with a concentration of 0.1M. Solution A contains a weak acid with a pKa of 5. The pH of solution A is 3. Solution B contains a weak acid with a pKa of 9. The pH of solution B is:

You have 125 g of a certain seasoning and are told that it contains 92.0 g of salt. What is the percentage of salt by mass in this seasoning?

How do you describe how sugar dissolves in tea using the big idea of particles?

Independent variables are known quantities such as time or the amount of a starting substance. Is this true?