Chemistry, 17.09.2019 00:40, joleerector113
1. what are si unit and number for mass in the following statement? an 85-pound boy throws a 5 kilogram ball 8 meters ahead of him. it takes the ball 6 seconds to fall to the ground.
a- 8 meters
b- 85 pounds
c- 5 kilograms
d- 6 seconds
2. which of the following are areas of physical science?
a- biology and chemistry
b- chemistry and physics
c- physics and astronomy
d- all of the above
3. two variables are indirectly proportional. this
a- one variable increases, which causes the other variable to increase.
b- one variable increases, which causes the other variable to decrease.
c- both variables are constant
d- none of the above
4. true or false: science and technology are not related.
true
false
5. which of these units is the longest?
a- centimeter
b- kilometer
c- millimeter
d- meter
6. when metal is heated, it can be molded into different shapes. metal is
a- viscous
b- flammable
c-malleable
d- hard
7. all pure
a- contain only one type of atom
b- can be broken down into simpler substances
c- cannot be broken down into simpler compositions
d- have a fixed composition
8. charles's law
a- when temperature increases volume increases.
b- when temperature decreases, volume increases.
c- when pressure decreases, volume increases.
d- when pressure decreases, volume decreases.
9. all of the following are elements
a- sugar
b- aluminum
c- hydrogen
d- iron
10. what is the atomic number of arsenic?
a-200
b-33
c-205
d-75
Answers: 1
Chemistry, 21.06.2019 18:30, ElizabethF
Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)
Answers: 3
Chemistry, 21.06.2019 23:30, huangjianhe135
Start an single atom tab. observe the decay of polonium-211. after each decay, press the reset nucleus button to watch the process again. write a description of alpha decay for po-211
Answers: 2
Chemistry, 22.06.2019 00:00, lilyclairehutson
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
Answers: 1
1. what are si unit and number for mass in the following statement? an 85-pound boy throws a 5 kilo...
Mathematics, 22.02.2021 15:10
Biology, 22.02.2021 15:10
Social Studies, 22.02.2021 15:10
Mathematics, 22.02.2021 15:10