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2 years ago

If an object does Not explode, catch fire, or dissolve, how would you describe this object? (Three answers)

Chemistry

1 answer:

yaroslaw [1]2 years ago

3 0

Non-combustible

eg:-glass,water,stone, Portland cement etc ...

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All of the following are properties of bases except

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The answer is D slippery to the touch

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3 years ago

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22.99 on the element sodium means the combined numbers of electrons and protons?

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Answer:

The answer is 11 electron and 11 protons respectively

Explanation:

Since the sodium is in it neutral state, number of electron is the same as the number of proton, which is 11.

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3 years ago

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Calculate the number of grams contained in each of the following number of moles. Report your answer with the appropriate number

Debora [2.8K]

<u>Answers:</u>

a. 131.85 grams

b. 134.69 grams

To calculate the number of grams in the number of moles given for each compound, consider the formula:

<em>Moles = No. of grams / molar mass</em>

Therefore, to find the gram it will become:

<em>No. of grams = moles x molar mass</em>

a. 0.410 mol of NaCl (sodium chloride)

Molar mass of NaCl = (286.14 + 35.45) = 321.59

No. of grams = moles x molar mass

No. of grams = 0.410 x 321.59 = 131.85 grams

b. 4.80 mol of C2H4 (ethylene)

Molar mass of C2H4 = (12.01 x 2) + (1.01 x 4) = 28.06

No. of grams = moles x molar mass

No. of grams = 4.80 x 28.06 = 134.69 grams

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3 years ago

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You are the medical examiner at the scene of a murder at a restaurant. There is a

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The compound : C₄₀H₄₄N₄O

<h3>Further explanation</h3>

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

• Determine the mass ratio of the constituent elements of the compound.

• Determine the mole ratio by dividing the percentage by the atomic mass

The mol ratio of composition : C : H : N : O

$\tt \dfrac{80.66}{12}\div \dfrac{7.39}{1}\div \dfrac{9.39}{14}\div \dfrac{2.68}{16}\\\\6.722\div 7.39\div 0.671\div 0.1675\rightarrow divide~by~smallest(0.1675)\\\\40\div 44\div 4\div 1$

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3 years ago

Find the new pressure of 5 L of a gas at STP that is cooled to 250 K and expanded to 6L

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I’m so sorry i have to do this 5L 24

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3 years ago

If an object does Not explode, catch fire, or dissolve, how would you describe this object? (Three answers)​

If an object does Not explode, catch fire, or dissolve, how would you describe this object? (Three answers)