Chemistry

Chemistry, 26.06.2019 12:00, dinapearce6078

What is the mass of 12.3 moles of helium (he)?

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Chemistry, 03.07.2019 14:50, taylorruiz16

Mole-atom conversions 1. how many moles are 1.55 x 1027 atoms of zinc (zn)? 2. how many atoms are in 25.0 moles of calcium (ca)? 3. how many atoms are in 0.35 moles of carbon (c)? 4. how many moles are 7.6 x 1024 atoms of helium? mole-mass conversions how many moles in 28.o grams of oxygen? what is the mass of 5.0 moles of iron? find the number of moles of argon in 452 g of argon. find the grams in 16.5 mol of hydrogen.

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Chemistry, 30.07.2019 22:00, tonimgreen17p6vqjq

Alarge weather balloon requires plenty of helium gas in order to ascend into the atmosphere to take measurements. if the balloon has a volume of 100,000 liters, about how many moles of helium gas would be required to fill the balloon to a pressure of 1 atm and a temperature of 27 degrees c? a. 531 moles b. 1394 moles c. 4063 moles d. 5280 moles

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Chemistry, 02.09.2019 17:50, em387p3s1zr

How many moles of helium are in a balloon filled with 6.02 x 1025 atoms of helium? 10.0 moles 1.00 mole 100 moles 6.02 moles

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Chemistry, 28.09.2019 03:30, shinyelish6

A3.5 liter tank contains 7.3 moles of nitrogen, 5.2 moles of oxygen, 1.5 moles of helium, and 8.1 moles of carbon dioxide at 197°c. calculate the partial pressure of each gas in the mixture

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