Questions by Shirin Niki

Questions by Shirin Niki

Which of the following aqueous solutions are good buffer systems? 0.25 M ammonium nitrate + 0.40 M ammonia 0.23 M nitric acid + 0.20 M sodium nitrate 0.16 M potassium hydroxide + 0.22 M potassium chloride

asked Jun 25, 2020

1 answer

1 vote

93.7k views

Whats a census taker

asked Apr 4, 2020

2 answers

1 vote

91.4k views

the height of an ostrich is 20 more than four times the height of a kiwi if the ostrich is 108 in tall how tall is a kiwi

asked Sep 15, 2019

2 answers

1 vote

108k views

Please help me out with number 7 and please explain

asked Mar 15, 2019

1 answer

1 vote

98.2k views

The graph represents a person's heart rate in beats per minute during 30 minutes of exercise. Which statement best describes the relationship between heart rate and time during exercise?

asked Oct 24, 2018

2 answers

0 votes

140k views

Which one of the following statements about essential nutrients is most accurate? A. They’re made by the body. B. They can be supplied adequately only through dietary supplementation. C. They must be obtained

asked Jun 21, 2018

1 answer

0 votes

27.2k views

Which conditions explain why there were so many working poor in the Industrial Age? 1. Many workers faced high wages and low rents. 2. Many workers faced low wages and high rents. 3. Many workers faced

asked Jun 11, 2018

2 answers

2 votes

42.3k views

ASAP!!!!!!!! According to classification, if two organisms are in the same class, then they must be in the same kingdom and A) family B) order C) phlyum D) species

asked May 19, 2018

2 answers

5 votes

203k views

Find the length of the indicated side of each triangle

asked Jan 14, 2018

1 answer

4 votes

78.1k views

Which statement accurately describes how identification of individuals through the use of genetic engineering is possible? a. The Y chromosome doesn't experience crossing-over. b. The X chromosome can

asked Jul 28, 2017

1 answer

3 votes

68.4k views

Which is the change in size of a group of organisms of the same species over time? A.population growth B.death rate C.birth rate D.immigration and emigration

asked May 21, 2017

2 answers

5 votes

159k views

“Genetic power is far more potent than atomic power. And it will be in everyone's hands. It will be in kits for backyard gardeners. Experiments for schoolchildren. Cheap labs for terrorists and dictators.

asked Apr 11, 2016

1 answer

0 votes

81.8k views

Six friends share 4 pears

asked Mar 28, 2016

2 answers

1 vote

108k views

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