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3 years ago

Q3. A bridge is built without expansion gaps.

Chemistry

2 answers:

goldenfox [79]3 years ago

7 0

Are you learning about atoms?

marshall27 [118]3 years ago

5 0

Answer:

Q3. A bridge is built without expansion gaps.

Explain what could happen to the bridge if the temperature became:

a) much hotter than the day it was built.

b) much colder than the day it was built.

P.s. (this is not a select option question, explain each according to the question)

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H<img src="https://tex.z-dn.net/?f=H_%7B2%7D%20%2BO_%7B2%7D" id="TexFormula1" title="H_{2} +O_{2}" alt="H_{2} +O_{2}" align="abs

Snowcat [4.5K]

Explanation:

<h2>Hydrogen + Oxygen = Water....</h2>

(~‾▿‾)~(~‾▿‾)~(~‾▿‾)~(~‾▿‾)~(~‾▿‾)~(~‾▿‾)~(~‾▿‾)~

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2 years ago

What measurement of a liquid can you make with a graduated cylinder

Amanda [17]

Graduated cylinders have numbers on the side that help you determine the volume.

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2 years ago

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If you put a pencil in a cup of water, it looks as if it is broken and larger in the water. This is because light waves A) can r

tekilochka [14]

Your answer should be C. bend when passing from air to water. Hope this helps! =^-^= If you need an explanation, just let me know.

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3 years ago

Read 2 more answers

How should you measure the mass of a given powdered substance??

Lelu [443]

To measure the mass of a given powdered substance do the following:
1. Zero the weighing balance, that is, put the weigh balance at zero mark.
2. Put an empty weighing paper on the balance and take its reading. Record it as X1.
3. Use spatula to put the powder you want to measure on the weighing paper on the balance. Take your reading and record it as X2.
The mass of the powered is X2 - X1.

6 0

2 years ago

Limescale removers contain sulfamic acid, H3NSO3, which reacts with minerals in hard water

I am Lyosha [343]

Answer:

0.375 moles of CaCO₃ are required

Explanation:

Given data:

Number of moles of sulfamic acid = 0.75 mol

Number of moles of calcium carbonate required = ?

Solution:

Chemical equation:

2H₃NSO₃ + CaCO₃ → Ca(SO₃NH₂)₂ + CO₂ + H₂O

Now we will compare the moles of H₃NSO₃ and CaCO₃ .

H₃NSO₃ : CaCO₃

2 : 1

0.75 : 1/2×0.75 = 0.375 mol

Thus, 0.375 moles of CaCO₃ are required.

4 0

2 years ago