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beks73 [17]
3 years ago
9

Jason noticed that his flashlight stopped working. He solved the problem by using the scientific method. Arrange the steps he fo

llowed in the correct order in the flowchart.
1.He suspects that the batteries could be dead.


2.He notices that his flashlight stopped working.


3.He replaces the batteries in the flashlight with new batteries.


4.His flashlight works again.He writes a note to himself to buy extra batteries.
Chemistry
2 answers:
Alika [10]3 years ago
5 0

Answer:the answer is 2. he noticed that his flashlight stopped working

1. he suspected that the batteries could be dead

3. he replaces the batteries in the flashlight with new batteries

4.his flashlight works again. he writes a note to himself to buy extra batteries

Explanation:

gulaghasi [49]3 years ago
4 0
The first part of the scientific method is the observation. Therefore, 2. is the first step.

The second step is the hypothesis. Therefore, 1. is next.

The third step is the experiment. Therefore, 3. is next.

The final step is the conclusion. Therefore, 4. is last.

The order is:
2.
1.
3.
4.
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Answer:

32(molecular mass has no unit )

Explanation:

(16)(o2)

16×2

=32

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2 years ago
Pls helppp ASAP I’ll brainlest
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Answer:

The answer is B

Explanation:

Hope that helps

4 0
2 years ago
Read 2 more answers
True or false
sweet-ann [11.9K]

Answer:

True.

But it only changes in physical change.

How?

Explanation:

The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance.

In a physical change, a substance's physical properties may change.

A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

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8 0
2 years ago
Determine the amount of heat(in Joules) needed to boil 5.25 grams of ice. (Assume standard conditions - the ice exists at zero d
Yuki888 [10]
Following are important constant that used in present calculations
Heat of fusion of H2O = 334 J/g 
<span>Heat of vaporization of H2O = 2257 J/g </span>
<span>Heat capacity of H2O = 4.18 J/gK 
</span>
Now, energy required for melting of ICE = <span>  334 X 5.25 = 1753.5 J .......(1)
Energy required for raising </span><span>the temperature water from 0 oC to 100 oC =  4.18 X 5.25 X 100 = 2195.18 J .............. (2)
</span>Lastly, energy required for boiling water = <span>  2257X 5.25 = 11849.25 J ......(3)
</span><span>
Thus, total heat energy required for entire process = (1) + (2)  + (3)
                                                                        = 1753.5 + 2195.18 + 11849.25
                                                                        = </span><span>15797.93 J 
</span><span>                                                                        = 15.8 kJ
</span><span>Thus, 15797.93 J of energy is needed to boil 5.25 grams of ice.</span>
7 0
3 years ago
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