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Karolina [17]
3 years ago
15

What is the volume of a rectangular object whose dimensions are 5.54 cm, 10.6 cm, and 199 cm?

Chemistry
2 answers:
Brilliant_brown [7]3 years ago
7 0
The answer is D 11,700
iVinArrow [24]3 years ago
4 0

<u>Answer:</u> The correct answer is Option d.

<u>Explanation:</u>

To calculate the volume of cuboid, we use the equation:

V=lbh

where,

V = volume of cuboid

l = length of cuboid = 5.54 cm

b = breadth of cuboid = 10.6 cm

h = height of cuboid = 199 cm

Putting values in above equation, we get:

V=5.54\times 10.6\times 199=11686.076cm^3\approx 11,700cm^3

Hence, the correct answer is Option d.

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A 1.775g sample mixture of potassium hydrogen carbonate is decomposed by heating. if the mass loss is 0.275g what is the percent
Marina86 [1]

A 1.775g sample mixture of KHCO₃ is decomposed by heating. if the mass loss is 0.275g, the mass percentage of KHCO₃ is 70.4%.

<h3>What is a decomposition reaction?</h3>

A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products.

  • Step 1: Write the balanced equation for the decomposition of KHCO₃.

2 KHCO₃(s) → K₂CO₃(s) + CO₂(g) + H₂O(l)

The mass loss of 0.275 g is due to the gaseous CO₂ that escapes the sample.

  • Step 2: Calculate the mass of KHCO₃ that formed 0.275 g of CO₂.

In the balanced equation, the mass ratio of KHCO₃ to CO₂ is 200.24:44.01.

0.275 g CO₂ × 200.24 g KHCO₃/44.01 g CO₂ = 1.25 g KHCO₃

  • Step 3: Calculate the mass percentage of KHCO₃ in the sample.

There are 1.25 g of KHCO₃ in the 1.775 g sample.

%KHCO₃ = 1.25 g/1.775 g × 100% = 70.4%

A 1.775g sample mixture of KHCO₃ is decomposed by heating. if the mass loss is 0.275g, the mass percentage of KHCO₃ is 70.4%.

Learn more about decomposition reactions here: brainly.com/question/14219426

7 0
2 years ago
The radius of a circle is 7.31. How should the circle area be reported?
Alona [7]

I'm not sure but it should be 7.31 times 2 times 3.14 or pi

7.31 x 2 x 3.14 = 45.9068

If you need to round to the nearest tenth it will be 45.9

If you need to round to the nearest hundredth it will be 45.91

7 0
3 years ago
Explain how the use of CNG in automobile has reduced pollution in our cities.​
sertanlavr [38]

Answer:

I think by charging

Explanation:

With charger

3 0
3 years ago
Lakes can disappear due to *
lesya [120]

Answer:

Drought, resulting in a 65% reduction in water levels.

8 0
3 years ago
1.
Dahasolnce [82]

Answer:

22.5moles

Explanation:

using mole ratio,n(CO2)/n(o)=1/2

n(CO2)=1/2n(02)

n(CO2)=1/2×45

moles of carbon dioxide produced is 22.5moles

8 0
2 years ago
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