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mr Goodwill [35]
3 years ago
14

3. What should you do after an earthquake when you are in a building?

Chemistry
2 answers:
balu736 [363]3 years ago
7 0

Answer:

3. You should walk fast in moving out.

4. You should stay in the evacuation center. Avoid going back to your car, aftershocks may occur.

5. Do not run

ziro4ka [17]3 years ago
7 0

Answer:

3. B

4. D

5. A

Explanation:

You are welcome

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The molecular weight of table salt, NaCl, is 58.5 g/mol. A tablespoon of salt weighs 6.37 grams. Calculate the number of moles o
cestrela7 [59]

Answer:

The number of moles of salt in one tablespoon is = <u>0.11 mole</u>

<u>Grams </u>cancel each other.

Explanation:

<u>Moles</u> : It is the unit of quantity . It is the mass of the substance present in exactly 12g of C-12.

moles=\frac{given\ mass}{Molar\ mass}

<u>Moles Calculation:</u>

Given mass = 6.37  gram

Molar mass = 58.5 g/mol

moles=\frac{6.37}{58.5}

= 0.1088

= 0.11 mole

<u>Units calculation</u>

moles=\frac{given\ mass}{Molar\ mass}

moles=\frac{g}{g/mole}

moles=\frac{g}{g}\times mole

<u>g ang g cancels each other </u>

moles = moles

<u>Hence unit = gram (g ) cancel each other.</u>

3 0
3 years ago
Read 2 more answers
Refer to the following compounds.
goblinko [34]

Answer: The answer is D. This has a Carboxylic Acid group, and is acetic acid, or Ethanoic Acid.

ALWAYS LOOK for the Functional Group in question.

A. Would likely not stay in water, or at least not be acidic, for it is butane gas.

B. Is 1-propanol, and alcohols are not acidic as a rule. Certainly not in water.

C. This is an Ether. It will not give up an H+, it it not an acid.

E. This functional group is an amine, which is more “base” like, since the lone pairs of the Nitrogen atom would tend to attract a H+.

5 0
4 years ago
Mercury can be obtained by reacting mercury(II) sulfide with
givi [52]

Answer:

111.68 g

Explanation:

Given data:

Mass of HgS needed = ?

Mass of CaS produced = 26.0 g

Solution:

Chemical equation;

4HgS + 4CaO  →     4Hg + 3CaS + CaSO₄

Number of moles of CaS:

Number of moles = mass/molar mass

Number of moles = 26 g/ 72.143 g/mol

Number of moles = 0.36 mol

Now we will compare the moles of HgS with CaS.

                 CaS             :             HgS

                   3                :               4

                   0.36           :              4/3×0.36 = 0.48 mol

Mass of HgS:

Mass = number of moles × molar mass

Mass = 0.48 mol × 232.66 g/mol

Mass = 111.68 g

6 0
3 years ago
Which statement accurately describes renewable energy sources?
Nikolay [14]

Answer:

D they are quickly replenished. I get this question a good bit so i know the answer.

Explanation:

7 0
4 years ago
Read 2 more answers
Glucose, C6H12O6, is a good source of food energy. When it reacts with oxygen, carbon dioxide and water are formed. How many lit
Arte-miy333 [17]

Answer:b

Explanation:

From the question, the stoichiometry of the balanced reaction equation showed that 180gof glucose give 134.4L of CO2. Then we are given to find the volume of carbon IV oxide given off by 126g of glucose. This is done as shown in the image by relating what is given to the stoichiometry of the balanced reaction equation to obtain the answer as shown.

6 0
3 years ago
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