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prohojiy [21]
2 years ago
10

Select the correct answer from each drop-down menu.

Chemistry
1 answer:
shtirl [24]2 years ago
7 0

Answer:

A (Hypothesis) is scientific knowledge published through direct observation and remains constant scientific knowledge can change when scientists (generate hypothesis)

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Which of the following is a chemical change? Explain your reasoning: (a) boiling canned soup; (b) toasting a slice of bread; (c)
schepotkina [342]

Answer:

(d) burning a log.

(b) toasting a slice of bread;

Explanation:

Chemical change -

A chemical change refers to , the change in which a new compound is formed .

From the question ,

  • boiling canned soup ,

Its is not a chemical process , since no new compound is formed , these is only change in state as the liquid is turning to gaseous sate .

  • Chopping a log ,

It is not a chemical process , as no new substance is formed .

  • toasting a slice of bread

It is a chemical change , in which bread surface is deposited by a brown coat via the process of heating , even this process is a irreversible in nature .

  • burning of log ,

It is a chemical change , as with the help of heating , the wood is turning to ashes .

6 0
3 years ago
A car travels 10km in 10 min so what is the average
ipn [44]
Average speed in km/h:

S = D/T

T = 10/60 hrs
   =  0.1667

S = 10 / 0.1667
   =  59.988 km/h
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3 years ago
T or F: The mass of an answer is so small it is rounded to 0 amu
Nutka1998 [239]
True because it doesn’t count as a full number
6 0
2 years ago
WILL MARK BRAINLIST
Free_Kalibri [48]

Answer:

The average speed must be 30mph so this means the car traveled for 2hrs 60/30

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How many moles of water are produced from 13.35 mol of oxygen?
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<span>2H2 + O2 mc015-1.jpg 2H2O

</span><span>26.70 moles</span>
3 0
2 years ago
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