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lesya692 [45]
3 years ago
13

What is a sign that a chemical change has happened?

Chemistry
1 answer:
KonstantinChe [14]3 years ago
8 0
I believe D is the answer.
You might be interested in
Question 1 of 10
max2010maxim [7]

Answer:

D. The stronger the forces, the more heat that must be added to boil

the liquid

Explanation:

The intermolecular forces hold the molecules together and so require energy to break them. When a substance changes states, it's not the atoms that separate from other atoms, it's molecules separating from molecules. The stronger the intermolecular forces, the more energy is required to break the intermolecular forces

4 0
3 years ago
Natural gas is primarily composed of ________. natural gas is primarily composed of ________. methane sulfur dioxide nitrogen ox
umka21 [38]
Natural  gas  is primarily composed of   methane (CH4)

 N
atural  gas  is a naturally  occurring  hydrocarbon  mixture  which  is  primarily  composed of Methane(CH4),  but it  also  contains ethane,propane and  heavier hydrocarbon. In addition  it  contain small amount  of nitrogen, carbon dioxide,hydrogen sulfide and traces amount of water.

7 0
3 years ago
Perform the following conversion: 6.1 × 103 K (the surface temperature of the Sun) to °F and °C. Pay attention to the number of
Keith_Richards [23]

Answer:

\°C=5.8x10^3\°C

\°F=1.1x10^4\°F

Explanation:

Hello,

In this case, for the calculation of the temperature in degree Celsius we subtract 273.15 to the given temperature in kelvins:

\°C=6100-273.15\\\\\°C=5.8x10^3\°C

Next, by applying the following equation we compute it in degree Fahrenheit:

\°F=(5.8x10^{3}*9/5) + 32\\\\\°F=1.1x10^4\°F

Clearly, since the initial unit has two significant figures the computed units also show two significant figures.

Regards.

5 0
3 years ago
-
Varvara68 [4.7K]
170km/h this probs right i think
7 0
4 years ago
Models are used to predict behaviors in the real world.<br> True<br> False
swat32
True
It’s true because models are based on real world problems to help grasp a understanding of the problem
7 0
3 years ago
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