Questions by Brian Weinreich

Questions by Brian Weinreich

The 30.6-g sample of the compound X2O3 contains 14.4 g of oxygen atoms. What is the molar mass of element X?

asked Sep 26, 2018

2 answers

2 votes

152k views

What is the next number in the sequence? 7, 16, 8, 27, 9,

asked Sep 12, 2018

1 answer

2 votes

57.6k views

In a food chain 90% of the energy is lost in the transfer at each trophic level, and only 10% passes as usable biological energy. What will happen if secondary consumers are removed from a food chain?

asked Mar 9, 2018

2 answers

1 vote

103k views

14x − 2y = 46 −7x + y = −23 Use substitution. How do you solve this? Please help and thank you! :)

asked Jan 26, 2018

1 answer

4 votes

122k views

Does softball, weightlifting, basketball, or bowling best improve cardiovascular endurance?

asked Jun 11, 2017

1 answer

0 votes

195k views

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