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4 years ago

A substance which contains various elements or compounds without bonding or in fixed proportions is a(n) _____.

1 answer:

5 0

The correct answer that would best complete the given statement above would be the word MIXTURE. A substance which contains various elements or compounds without bonding or in fixed proportions is a mixture. When a chemical union occurs, this is when a compound is being formed. Hope this answer helps.

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Determine which of the following contains the greatest mass of aluminium: 122 g of AlPO4, 266 g of A12C16, or 225 g of

pav-90 [236]

Answer : The $Al_2S_3$ contains the greatest mass of aluminum.

Explanation :

For $AlPO_4$ :

Molar mass of $AlPO_4$ = 122 g/mole

Molar mass of aluminium = 27 g/mole

As, 122 g of $AlPO_4$ contains 27 g of Al

So, 122 g of $AlPO_4$ contains $\frac{122}{122}\times 27=27g$ of Al

The mass of 'Al' in $AlPO_4$ is, 27 grams.

For $Al_2Cl_6$ :

Molar mass of $Al_2Cl_6$ = 266.7 g/mole

Molar mass of aluminium = 27 g/mole

As, 266.7 g of $Al_2Cl_6$ contains $2\times 27g$ of Al

So, 266 g of $Al_2Cl_6$ contains $\frac{266}{266.7}\times 2\times 27=54g$ of Al

The mass of 'Al' in $Al_2Cl_6$ is, 54 grams.

For $Al_2S_3$ :

Molar mass of $Al_2S_3$ = 150 g/mole

Molar mass of aluminium = 27 g/mole

As, 150 g of $Al_2S_3$ contains $2\times 27g$ of Al

So, 225 g of $Al_2S_3$ contains $\frac{225}{150}\times 2\times 27=81g$ of Al

The mass of 'Al' in $Al_2S_3$ is, 81 grams.

Hence, from this we conclude that $Al_2S_3$ contains the greatest mass of aluminum.

5 0

3 years ago

A ball rolls down a hill. It starts with velocity of 2 ms. After 2 seconds, the ball has a velocity of 12 ms. What is the accele

trapecia [35]

Answer:

5 ms2

Explanation:

8 0

3 years ago

Read 2 more answers

How to get the density of this unknown liquid?

scoray [572]

Answer:

Measure the volume of water poured into a graduated cylinder, then place the object in the water and remeasure the volume. The difference between the two volume measurements is the volume of the object. Now simply divide the mass by the volume to calculate the density of the object.

3 0

3 years ago

Why is it that when you have a strong acid and weak base your equivalence point is less than 7

yKpoI14uk [10]

Explanation:

When a strong acid, say $HCl$ reacts which a weak base, say $NH_3$ , the reaction is shown below as:-

$\text{NH}_3 (\text{aq}) + \text{HCl} (\text{aq}) \rightarrow {\text{NH}_4^+}(\text{aq}) + \text{Cl}^-(\text{aq})$

The salt further reacts with water as shown below:-

$\text{NH}_4^+ + \text{H}_2\text{O} \rightarrow \text{H}_3\text{O}^+ + \text{NH}_3$

Formation of $\text{H}_3\text{O}^+$ lowers the pH value of the solution as more hydrogen ions leads to less pH.

3 0

3 years ago

A 250-mL aqueous solution contains 1.56 mc025-1.jpg 10–5 g of methanol and has a density of 1.03 g/mL. What is the concentration

Elis [28]

The right answer for the question that is being asked and shown above is that: "B 1.5 X 1-^-5 ppm." A 250-mL aqueous solution contains 1.56 mc025-1.jpg 10–5 g of methanol and has a density of 1.03 g/mL. The concentration in ppm is that 1.5 X 1-^-5 ppm

4 0

4 years ago

Read 2 more answers