Physics, 04.07.2019 09:00 thepantsgirl
24. most cleaning solutions like soap, with a ph of 8-9 are examples of a(n) a. acid b. base c. neutral substance 25. in a sample of 100 g of nitrogen, how much would be left after 20 minutes if the half life is 9.9 minutes? a. 75 g b. 50 g c. 25 g d. 12.5 g 26. what are the signs you can see that would show you a chemical reaction has occurred? a. color change, changing shape, and temperature change b. bubble formation, temperature change, and color change c. bubble formation, change in size, and color change d. change in state, color change, and bubble formation 27. which of the following is not a homogeneous mixture? a. italian salad dressing b. salt water c. chocolate pudding d. steel 28. if 6.25 grams of a sample of carbon is left after decaying over 22,920 years, how much of the sample did you start with? the half-life of carbon is 5,730 years. a. 100 grams b. 25 grams c. 50 grams d.75 grams 29. which of the following is not a property of an acid? a. tastes sour b. usually reacts with a metal c. changes the color of an indicator d. feels slippery 30. what atom would most likely form a covalent bond with carbon? a. sodium b. potassium c. chlorine d. gold
Answers: 1
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Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline
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There are 3 ways heat can be transferred: through solids, called , through liquids and gases , called , and through electromagnetic waves, called
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Physics, 23.06.2019 21:50
A500-watt vacuum cleaner is plugged into a 120-volt outlet and used for 30 minutes. how much current runs through the vacuum? 900,000 amps 60,000 amps 4.2 amps 0.24 amps
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24. most cleaning solutions like soap, with a ph of 8-9 are examples of a(n) a. acid b. base c. neut...
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