Chemistry, 31.07.2019 05:00 jasjoh39p0rp6i
Timed the helium used to fill birthday balloons doesn’t come out of the air, but fromout of the ground. some of the gas might escape from the ground into theatmosphere, but the majority of it is trapped in earth’s crust. based on whatyou have learned in today’s lab, give a reasonable explanation for thepresence of helium gas in earth’s crust.
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Chemistry, 22.06.2019 08:00
Match the mixture with the substance// i really need on this guys (it’s a pic btw)
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Chemistry, 22.06.2019 17:00
Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness
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Chemistry, 22.06.2019 22:00
The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?
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Chemistry, 23.06.2019 01:00
Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas
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Timed the helium used to fill birthday balloons doesn’t come out of the air, but fromout of the gro...
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