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Len [333]
2 years ago
13

Oxidation number ofAl2S12O7

Chemistry
1 answer:
Savatey [412]2 years ago
6 0

Answer:

-2? if wrong im sorry please tell me what I did that was incorrect ty  Explanation:

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why the total mass of the products would be less than the total weight of the reactant after a chemical reaction?
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The best explanation would be that Gases were released during the Chemical reaction, causing a loss of Mass. 
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3 years ago
Which is a property of barium (Ba)?
777dan777 [17]

Answer:

i think but i am not sure but according to me it mainly reacts yo non metals and i think its very reactive if my answer is wrong then comment below this question i will see it and i will get an opportunity to learn something new

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Which of the following statements holds true for a chemical change? In a chemical change, no new substance is formed. In a chemi
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<span>In a chemical change, the molecular structure of a substance changes. I think this is right. I hope this helps.</span>
8 0
3 years ago
Read 2 more answers
A solution is made containing 4.6 g of sodium chloride per 250g of water.
lozanna [386]

Answer:

\large \boxed{1.81 \, \%}

Explanation:

\text{Mass percent} = \dfrac{\text{mass of solute} }{\text{mass of solution}} \times 100 \, \%

Data:

Mass of NaCl =      4.6 g

Mass of water = 250    g

Calculations:

Mass of solution = mass of NaCl + mass of water = 4.6 g + 250 g = 254.6 g.

\text{\% m/m} = \dfrac{\text{4.6 g} }{\text{254.6 g}} \times 100 \, \% = \mathbf{1.81 \, \%}\\\\\text{The percent by mass of NaCl is $\large \boxed{\mathbf{1.81 \, \%}}$}

3 0
3 years ago
Which numerical setup can be used to calculate the<br> atomic mass of the element bromine?
Gekata [30.6K]

Answer:

From the numerical steps highlighted under explanation, the average atomic mass of bromine is 79.91 u

Explanation:

The steps to be taken will involve;

1) Find the number of isotopes of bromine.

2) Identify the atomic mass and relative abundance of each of the isotopes.

3) Multiply the atomic mass of each of the isotopes by their corresponding values relative abundance value.

4) Add the value in step 3 above to get the average atomic mass of bromine.

Now;

Bromine has 2 isotopes namely;

Isotope 1: Atomic mass = 78.92amu and a relative abundance of 50.69%.

Isotope 2: Atomic mass = 80.92amu and a relative abundance of 49.31%.

Using step 3 above, we have;

(78.92 × 50.69%)

And (80.92 × 49.31%)

Using step 4 above, we have;

(78.92 × 50.69%) + (80.92 × 49.31%) ≈ 79.91 u

6 0
3 years ago
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