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lilavasa [31]
3 years ago
12

What are characteristics of a chemical equation?

Chemistry
1 answer:
N76 [4]3 years ago
8 0
Answer: e. Number 1 and 3
Reasoning: Correct formulas are necessary to get the correct outcome. No matter is created or destroyed, the equation must be balanced.
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3) In the Hydrolysis of Disaccharides and Polysaccharides portion of the lab, starch should give one positive iodine test and on
AfilCa [17]

Answer: potassium iodide is the basic test for starch,and the positive test is blue-black coloration, any other test substance which is not starch will give a negative results.

Explanation:

Starch is an example of  polysaccharide  and since the standard test for it is potassium iodide solution, it gives a positive test.

Diasaccharides e.g maltose are reducing sugars.their standard test is BENEDICT test .

Therefore, in the hydrolysis;  starch should give a positve test, while Diasaccharides should give negative rest.

3 0
3 years ago
In the past earths sea level has sometimes been lower at that time which of the following would have been a major difference in
valina [46]
The answer which would have been a major difference in the ocean basins is the following one:
<span>B. Mid-ocean ridges would have been chains of mountains.

Given that the waters were lower in the past, those ridges would no longer be just mid-ocean ridges, but complete mountains due to the low levels of water around them.</span>
8 0
2 years ago
Read 2 more answers
Calculate the amount of heat needed to evaporate 235.0 grams of water from 25.0°C to 100.0°C.
steposvetlana [31]
I hope this helps answer your question. :)

These problems are very hard to do digitally so I would recommend trying to practice these types of problems on paper :)

6 0
3 years ago
How do scientists design roller coasters without using an engine?
NemiM [27]

Answer:

Before a rollercoaster ride begins, an electric winch winds the cars to the top of the first hill. That can take a while, because some rollercoasters start off nearly 100m (330ft) in the air!

The winch has to use energy to pull the rollercoasters up the hill, but that energy doesn't simply disappear. The rollercoaster cars store it just by being up in the air—and the higher up they are, the more energy they store. They'll use the same energy to race back down the hill when the ride begins. Because they have the ability (or potential) to use in the future energy that was stored in the past, we call the energy they're storing potential energy.

Explanation:

mark me brainliest

4 0
3 years ago
What source provides most of the energy consumed in the United States?
umka2103 [35]

Answer:

Fossil fuels

Explanation:

Fossil fuels — natural gas, coal, and petroleum, and — provide most (63 %) of the energy consumed in the United States

The breakdown in 2019 was  

Natural gas 38 %

Coal             24 %

Petroleum      1 %

4 0
3 years ago
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