Chemistry, 03.03.2021 01:30 pablogonzaleztellez
What happens to the atomic mass of the elements moving from left to right within a period?
A. The atomic mass stays the same within a period.
B. The atomic mass fluctuates throughout the period.
C. The atomic mass decreases.
D. The atomic mass increases.
Answers: 2
Chemistry, 21.06.2019 15:30
How to solve 4 nh3(g) + 5 o2(g) > 4 no(g) + 6 h2o(g) in chemistry
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Chemistry, 21.06.2019 20:30
12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]
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Chemistry, 22.06.2019 03:40
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
Chemistry, 22.06.2019 05:40
Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3
Answers: 3
What happens to the atomic mass of the elements moving from left to right within a period?
A. The a...
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