Chemistry, 02.08.2019 13:00 andybiersack154
Samantha & ryan are investigating an unknown substance. they make the following observations about the substance: 1. it is black 2. it has a dull luster 3. it weighs 6.50 g 4. it is solid 5. it is roughly 2 inches long 6. it does not conduct electricity 7. it takes up a volume of 2.00 ml 8. it has a density of 3.25 g/ml some of these properties will change if more sample were added to their observations. some will stay the same. which properties will change? choose the numbers a) 1,2,3,8 b) 3,5,7,8 c) 3,5,7 eliminate d) 3,6,8
Answers: 2
Chemistry, 21.06.2019 21:10
How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103
Answers: 1
Chemistry, 22.06.2019 13:30
1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6
Answers: 2
Chemistry, 22.06.2019 19:00
How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 → cu(no3)2 + 2 ag
Answers: 3
Samantha & ryan are investigating an unknown substance. they make the following observations ab...
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