Calculate the pH of a buffer that is 0.205M in NaHCO3 and 0.285M in Na2CO3.

When 15 grams of copper (II) chloride (CuCl2) reacts with 20 grams of sodium nitrate (NaNO3), 11.3 grams of sodium chloride (NaCl) is obtained. What is the percent yield of this reaction? CuCl2 + 2NaNO3 Cu (NO3) 2 + 2NaCl

You place ice cubes into a glass of lemonade what happens to make the lemonade to get cold

If an atom's mass number is 210 and its atomic number is 85, how many neutrons does it have?

Which of the following Period 4 elements has the most metallic characteristics? A) Ca B) Ge C) As D) Br

Which is an example of making a quantitative observation?

For an experiment, a biology student makes 1 liter of a solution containing the following substances, which are shown in the table below.

If 1.0 mole of CH4 and 2.0 moles of Cl2 are used in the reaction CH4 + 4Cl2 = > CCl4 + 4HCl then which of these statements is TRUE? A. All of the CH4 will be used up. B. The theoretical yield of CCl4 is 1.0 mole. C. Some Cl2 will be left over. D.

Why do humans primarily form communities? A. To analyze group behavior B. To meet the needs of groups and individuals C. To preserve language and culture D. To make and follow codes of conduct

Which of the following is fact-based science rather than part of a belief system a. astrology b. paranormal investigation c. chemistry d. philosophy e. cultural rituals

Meanders form when a river flows across bedrock? true or false