Select all of the answers that apply. what are the two main ingredients in air? oxygen carbon dioxide nitrogen helium hydrogen

A 92.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 46.0 ml of koh at 25 ∘c.

Find the pH of a solution whose H + concentration is 1.8 x 10-12

How many grams of sodium bromide must be dissolved in 400.0 g of water to produce a 0.500 molal solution? a. 20.6 g b. 20.0 g c. 52.1 g d. 2.00 g

A sample has a pH of - 0.248 (yes, it really is possible to have a negative pH). Find the pOH, [H] and [OH].

What volume of a 0.20-M K2SO4 solution contains 57 g of K2SO4?

A intramuscular medication is given at 5.00mg/kg of body weight. What is the dose in grams for a 180-lb patient?

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?