Chemistry, 25.11.2021 14:00 tynitenaire
22 2021
Block:
1. A sample of high purity silicon is prepared by strongly heating a mixture of hydrogen and
silicon tetrachloride in a sealed tube:
SiCl4 + 2 H2 → Si + 4 HCI
If exactly 1.00g of silicon is required, what mass of Sicla and H2 must react?
Answers: 3
Chemistry, 22.06.2019 17:30, llamasking
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Chemistry, 23.06.2019 00:00, alisonsolis155
Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3
Answers: 3
22 2021
Block:
1. A sample of high purity silicon is prepared by strongly heating a mixture...
1. A sample of high purity silicon is prepared by strongly heating a mixture...
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