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3 years ago

Why is calcium carbonate used as a building material

2 answers:

7 0

Calcium Carbonate is very cheap to produce in bulk and has some properties that can be favorable for building a house. That being said, im guessing you got this question from the acid rain post with calcium carbonate. Many things will break down in contact with an acidic substance but it will take a very long time in the case of acid rain (because it is dilute)

VMariaS [17]3 years ago

3 0

Because it is used for building - making concrete and cement - and the manufacture of glass, steel and iron.

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PLEASE HELP NAME THIS CHEMICAL AsO3

Oksi-84 [34.3K]

Answer:

I believe it is "Arsenenate"

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3 years ago

The “fatal flaw” in Rutherford’s model of the atom was the idea that if the electrons were ________.

Wittaler [7]

The correct option is A. Rutherford model of the atom consider an atom to be made up of a central nucleus with electrons orbiting around it. The nucleus is considered to be tiny, heavy and its positively charged while the electrons are negatively charged. The shortcoming of this model is that it was not able to explain how the positive nucleus was not able to attract the negative electrons and pull them inside the nucleus.

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3 years ago

Which of the following compounds will produce H2O as one of the products when it decomposes?

aivan3 [116]

B) Cu(OH) 2 Is the resulting answer when H20 is decomposed.

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2 years ago

Read 2 more answers

Explain how the information given below could be used to determine the concentration of an unknown sample.

Vika [28.1K]

Answer:

See below

Explanation:Plot the known concentrations and adsorbance data. Draw a best fit line through thwe points. When the absorbance of a solution of unknown concentration (but same substance) is determined, find the concentration from the line at that absorption value. See attached graph.

E.g., an sample of the same substance had an absorbance of 0.35. Find that on the x scale and then determine the concentration that would be required to produce that level of absorbance. 0.483M in this case.

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1 year ago

An unknown compound contains only C, H, and O. Combustion of 8.50 g of this compound produced 20.0 g CO2 and 5.46 g H2O. What is

Galina-37 [17]

Answer:

The answer to your question is: C₃H₄O

Explanation:

Data

CxHyOz = 8.5 g

CO2 = 20 g

H2O = 5.46 g

Reaction

CxHyOz + O2 ⇒ CO2 + H2O

CO2

MW = 44g

44g CO2 ----------------- 12g of C

20g CO2 ---------------- x

x = (20 x 12) / 44

x = 5.45 g of C

# of moles = n = 5.45 / 12 = 0.454 mol of C

H2O

MW = 18 g

18 g H2O ------------------- 2g of H

5.46 g -------------------- x

x = (5.46 x 2) / 18 = 0.61 g of H

n = 0.61 / 1 = 0.61 moles of H2

Mass of O2

mass CxHyOz = mass CO2 + mass H2 + mass O2

mass O2 = 8.5 - 5.45 - 0.61

mass O2 = 2.44g

n = 2.44 / 16 = 0.153 mol of O2

Now, divide by the lowest number of moles

0.454 mol of C/ 0.153 = 2.97 ≈ 3

0.61 moles of H2/ 0.153 = 3.99 ≈ 4

0.153 mol of O2/ 0.153 = 1

Then, the empirical formula is: C₃H₄O

7 0

3 years ago