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Answers by Desorder

Answers by Desorder
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The half-life of uranium-235 is 700 million years. If a rock that formed in the early Precambrian era (about 2100 million years ago) originally contained 20 grams of uranium-235, about how much uranium-235
answered Dec 20, 2020
6 votes
178k views
Rewrite x2 − 6x + 7 = 0 in the form (x − a)2 = b, where a and b are integers, to determine the a and b values. Answer 1: a = 4 and b = 3 Answer 2: a = 3 and b = 2 Answer 3: a = 2 and b = 1 Anwser 4: a
answered Oct 1, 2020
7 votes
20.0k views
Which sentence contains a preposition
answered Aug 12, 2020
4 votes
46.5k views
Suppose 23.8 g of oxygen (O2) is heated at constant atmospheric pressure from 27.4°C to 149°C. (a) How many moles of oxygen are present? (Take the molar mass of oxygen to be 32.0 g/mol) (b) How much energy
answered Jul 21, 2020
4 votes
29.8k views
PLEASE HELP ASAP!!! If an unbalanced force pushes a toy car in the same direction it was already moving, what will happen? A. The toy car will speed up B. The toy car will change direction. C. The toy
answered Jun 12, 2020
5 votes
22.1k views
The alkaline earth metals have higher ionization energies than the alkali metals. true or false
answered Jan 20, 2020
7 votes
21.5k views
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