Answers by Renan Lopes
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Answers by Renan Lopes

Answers by Renan Lopes
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Radioactive carbon, or C-14, is used to date fossil remains. When C-14 decays, as seen in the nuclear equation, it produces what nuclide of nitrogen? A) N-7 B) N-13 C) N-14 D) N-15
answered Jul 10, 2019
3 votes
146k views
The mass of an atom is contained primarily in its _____. electron shell nucleus protons size
answered May 23, 2019
4 votes
171k views
Which of these communists nations is currently attempting to build nuclear weapons despite restrictions by the U.N? Russia, China, North Korea, or Cuba.
answered Apr 29, 2019
4 votes
41.7k views
Which of these can be used as a hook in the introduction of an informative essay? check all that apply.
answered Feb 17, 2019
6 votes
198k views
Which of the following is true about how science is used to solve a problem? A.It is affected by social concerns. B.It is unaffected by political concerns. C.It is not influenced by economic conditions.
answered Feb 3, 2019
2 votes
77.1k views
Charles washes his hands every time he passes either the bathroom or the kitchen sink. Before he goes to bed at night, he checks several times to make sure that the stove is turned off. According to this
answered Sep 26, 2018
4 votes
224k views
What does this question mean :Write the moral of the fragment or escribe la moraleja del fragmento
answered Sep 13, 2018
4 votes
153k views
Which of these is a concept that began in ancient Greece and influenced the development of American constitutional democracy?
answered Jul 20, 2018
1 vote
227k views
A program on television ran 30 minutes. The program ran seven minutes longer than three times the length of the commercials. Use the guess and check method to find the number of minutes the commercials
answered May 13, 2018
1 vote
77.1k views
In samuels memory which tone does the author most clearly use to tell samuels story
answered Mar 26, 2018
5 votes
114k views
the total cost of 4 pens and 7 mechanical pencils is $13.25 the cost of each pencil is $0.75 write an equation that could be used to find the cost of a pen
answered Mar 10, 2018
3 votes
48.2k views
The Battle of _____ was part of the Second Persian War. Wanting to avenge the Battle of Marathon loss, Xerxes of Persia sent an army to fight 300 Spartans, Helots, and northern city-state soldiers, defeating
answered Aug 11, 2017
6 votes
49.0k views
European Crusaders came from all the following countries except: a. Germany b. France c. Britain d. India
answered Mar 10, 2017
2 votes
183k views
Standard form, expand form what is the other form
answered Mar 1, 2017
0 votes
152k views
Lydia is mailing newsletters. Each newsletter is printed on two sheets of paper. An envelope weighs 6.672 g and one sheet of paper weighs 4.330 g. What is the total weight of five envelopes that each contain
answered Feb 24, 2017
0 votes
45.1k views
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