How many moles are in 7.90E24 atoms of Ca?
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Chemistry, 22.06.2019 15:00
Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ΒΊc and rises to an altitude where its volume is twenty times the original volume and its temperature is β 50.0ΒΊc ?
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Chemistry, 23.06.2019 14:00
Ineed in question 5and6 in science the subject is science
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Chemistry, 23.06.2019 16:30
Boron has an average atomic mass of 10.81. one isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent . the other isotope has a relative abundance of 80.20 percent what is the mass of that isotope? report two decimal places
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Chemistry, 23.06.2019 16:30
An is a pure substance that canβt be broken down into simpler substances by chemical or physical means
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