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Question 1 (1 point)
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Avogadro's number 6.02 X 10^23 is us...
Biology, 22.05.2020 12:58 wanderlay29
PLEASE HELP
Question 1 (1 point)
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Avogadro's number 6.02 X 10^23 is used in chemistry to measure something like electrons, atoms, elements etc.
Question 1 options:
True
False
Question 2 (1 point)
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If you have 2 moles of marbles how many marbles do you have?
Question 2 options:
3.01 X 10^24
12.04 x 10^23
6.022 x 10^23
2.0 x 10^23
Question 3 (1 point)
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Which value approximately represents the number of atoms in one mole of gold?
Question 3 options:
2.30×10^6
3.26×10^6
6.02×10^23
12.04×10^24
Question 4 (1 point)
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How many hydrogen molecules are in 1.2 moles of hydrogen?
Question 4 options:
7.2 x 10^23
0.19 x 10^23
1.9 x 10^24
4.8 x 10^23
Question 5 (1 point)
How many water molecules are in 2.1 moles of water?
Question 5 options:
2.86 x 10^23
3.4 x 10^23
0.34 x 10^23
1.264 x 10^23
Answers: 3
Biology, 21.06.2019 19:50
Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?
Answers: 3
Biology, 22.06.2019 01:50
Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?
Answers: 1
Biology, 22.06.2019 10:30
Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.
Answers: 2
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