How did early chemists determine which substances were elements?
a. by observing chemical re...
Chemistry, 24.08.2019 13:30, Janznznz4012
How did early chemists determine which substances were elements?
a. by observing chemical reactions
b. by finding the atomic mass
c. by counting neutrons
d. by counting protons
Answers: 2
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How have the greenhouse gasses increased from the year 2000 to 2018
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Which three statements represent the benefits of performing experiments using computer simulations?
Answers: 2
Chemistry, 22.06.2019 20:00, jalenevoyles
Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.
Answers: 3
Chemistry, 23.06.2019 01:30, elijahbebeastin
What are several ways to reduce the effect of friction
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