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Which of the following compounds is a covalent (i.e., molecular) compound? A. Na2CO3 B. NaOH C. C2H4O2 D. MgBr2
answered
Oct 27, 2018
Chemistry
high-school
7
votes
66.3k
views
The half-life of sodium-22 is 2.6 years. A sample contains 800 mg of this isotope. Which expression represents the mass of sodium remaining after h half-lives? A. S = 0.5(800)^h B. S = 800^(0.5)h C. S
answered
Oct 7, 2018
Mathematics
high-school
5
votes
182k
views
What is a base used in toothpaste sorbitol carrageenan magnesium hydroxide sodium lauryl sulfate
answered
Jul 5, 2018
Chemistry
high-school
2
votes
173k
views
Help me to find the answer
answered
May 26, 2018
Mathematics
middle-school
7
votes
119k
views
Most gaseous pollutants come from a group of chemicals called _____. a. oxides b. chlorofluorocarbons c. ozones d. hydrocarbons
answered
Apr 6, 2018
Biology
high-school
5
votes
144k
views
What effects can smoking lead to?
answered
Nov 21, 2017
Health
high-school
2
votes
134k
views
Find a cubic function with the given zeros. Square root of 6, - Square root of 6, -3
answered
May 24, 2017
Mathematics
high-school
6
votes
205k
views
Which of the following resulted in many emancipated slaves remaining on the plantations where they had been enslaved? the creation of a system of sharecropping the distribution of free land seized by the
answered
Nov 28, 2016
History
high-school
2
votes
130k
views
1.a part time job pays $237.50 for 25 hours of work how much money dose the job pay per hour?
answered
Jul 23, 2015
Mathematics
middle-school
2
votes
96.6k
views
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