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algol13
2 years ago
12

Which of the following statements is true regarding both theories and laws?

Chemistry
1 answer:
Mariana [72]2 years ago
6 0

Answer:

D. Supported by observations

Explanation:

Because theories change over time, they both need to be proven, they do not go off of consensus, but they do need to be supported by observations.

HOPE IT HELPS❣️

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Name this alkane.
Mama L [17]

Answer:

propylcyclopentane

Explanation:

The rest Are swiggly lines and more than 5 sides

7 0
3 years ago
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Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25
alekssr [168]

Answer: 25.5°C

Explanation: take the average of the reading i.e (25 + 26)/2= 25.5

5 0
3 years ago
1. Calculate the momentum of a 1,500 kg car traveling at 6 m/s.
ziro4ka [17]

Answer:

1.9000kgm/s

2.258,000kgm/s

Explanation:

1.Momentum is given as the product of mass by velocity of an object.

Momentum,p=mv

m=1,500kh, v=6m/s

p=1500*6\\p=9000kgm/s

2.Momentum,p=mv

m=7800kg, v=30m/s

p_1=7800*30\\p_1=234,000kgm/s\\

new mass=7800+800=8600

As mass is increased, so does the resultant velocity as mass is directly proportional to velocity.

p_2=8600*30\\p_2=258,000kgm/s

8 0
3 years ago
Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decreas
Shtirlitz [24]
Riley can either change the surface area of the object or can change the slipperiness of the material.
5 0
3 years ago
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Isn’t urgent the first 3 will be marked BRAINIEST
bearhunter [10]

Answer:

Al2(SO4)3 and Mg(OH)2

Explanation:

1. Al has a charge of 3-, and SO4 of 2-

when you cross multiply the charges you get

Al2 and (SO4)3

*the reason theres a bracket around the sulfate ion is that the charge 3 is not for oxygen only, but the entire sulphate ion*

Hence, Al2(SO4)3

2. Mg has a charge of 2- and OH of 1-

again cross multiply

Mg (you dont need to add the 1) and (OH)2

again, the bracket around OH means the charge appiles to Oxygen AND hydrogen

hence, Mg(OH)2

7 0
3 years ago
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