Chemistry, 27.10.2020 05:50 jebjeb6124
Air is approximately 21 percent oxygen gas (O2) and 78 percent nitrogen gas (N2). Can you tell from the information in the periodic table why helium balloons float in air?
Answers: 3
Chemistry, 21.06.2019 18:10
The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?
Answers: 1
Chemistry, 22.06.2019 11:50
Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?
Answers: 3
Chemistry, 22.06.2019 12:00
Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.
Answers: 1
Air is approximately 21 percent oxygen gas (O2) and 78 percent nitrogen gas (N2). Can you tell from...
Mathematics, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00
Social Studies, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00
Social Studies, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00
English, 09.04.2021 18:00
Mathematics, 09.04.2021 18:00