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Answers by Doddy

Answers by Doddy
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What are the four observations that confirm that a chemical reaction is happening?
answered Jan 26, 2019
4 votes
113k views
The burning of 48.7 g of zns in the presence of oxygen gives 220.0 kj of heat. what is h for the reaction as written below?
answered Jan 12, 2019
7 votes
189k views
Which statements are true? Select each correct answer. Pick more then one 8x3−6x=2x3(4−3x3) 30x4−12x3=6x3(5x−2) 100x3+5=5x3(20x+1) 4x2+10x=2x(2x+5) Which expressions are completely factored? Select each
answered Dec 24, 2018
3 votes
220k views
What is the quotient (125 – 8x3) ÷ (25 + 10x + 4x2)? –2x + 5 2x – 5 –2x – 5 2x + 5
answered Jun 15, 2018
1 vote
166k views
Which ratio is equal to 15:20? ► 21 to 28 ► 5 to 10 ► 18:25 please guide me how to possible
answered May 12, 2018
4 votes
191k views
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