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Balance the following equation: | Balanseer die volgende vergelyking:
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_ NH3(g) + _ O2(g) → _ NO(g) + _ H2O(g)
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Name the following compound: | Benoem die volgende verbinding: |
TiHPO4 | |
The correct name for the following compound is: | Die korrekte naam vir die volgende verbinding is: |
Mg(ClO4)2 | |
The name for the following compound is | Die naam vir die volgende molekule is: |
N2O | |
The name for the following compound is: | Die naam vir die volgende molekule is: |
NF3
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Name the following compound: | Benoem die volgende verbinding: |
CoSO4
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Name the following compound: | Benoem die volgende verbinding: |
(NH4)3PO4 | |
Copper exists as a mixture of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu. Copper-65 is 30.83% abundant and it has a mass of 64.9278 amu. Calculate the atomic mass of copper and chose the correct answer. | Koper kom voor as a mengsel van twee isotope. Koper-63 se voorkoms is 69.17% met 'n massa van 62.9296 amu. Koper-65 se voorkoms is 30.83% met 'n massa van 64.9278 amu. Bereken die atoommassa van koper en kies die korrekte antwoord. |
Which species has 54 electrons? | Watter ioon besit 54 elektrone? |
Bromine has two stable isotopes (79Br and 81Br) with masses of 78.918338 u and 80.916291 u. The average molar mass of Br is 79.90 u. What is the percent abundance of 81Br? (Give your answer to two decimal figures.) | Broom het twee stabiele isotope (79Br en 81Br) met massas van 78.918338 u en 80.916291 u. Die gemiddelde molêre massa van Br is 79.90 u. Wat is die persentasie voorkoms van 81Br? (Gee jou antwoord tot twee desimale syfers.) |