Chemistry, 24.05.2021 14:00 harleyguerrieri
Period 3 contains the elements sodium to argon. This question asks about the chemistry of
each of the Period 3 elements or their compounds.
Sodium nitrate is a white crystalline solid. When heated it melts and the following reaction
occurs.
2NaNO3(l) → 2NaNO2(l) + O2(g)
A 3.40g sample of sodium nitrate is heated.
Calculate the
• number of moles of NaNO3 used, mol
Answers: 2
Chemistry, 22.06.2019 08:30
Joan writes four numbers on the board in standard form, and then she writes their scientific notation
Answers: 1
Chemistry, 22.06.2019 12:00
A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?
Answers: 1
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
Period 3 contains the elements sodium to argon. This question asks about the chemistry of
each of t...
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