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prisoha [69]
3 years ago
14

Magnesium metal a gray solid, is heated in a crucble in the presence of oxygen

Chemistry
1 answer:
Vesnalui [34]3 years ago
3 0

Answer:

powder

Explanation:

ok

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The mixture which contains elements only is (a) air (b) brass (c) mineral water (d) seawater
Sholpan [36]

Answer:

So yes! A mixture can contain just elements if those elements are not chemically reactive to one another. Air is a great example of an elemental mixture as it contains nitrogen, oxygen, and argon (along with some other compounds).

Explanation:

hope this helps you :)

4 0
3 years ago
Read 2 more answers
PLEASE HELP ME SOLVE THIS.Thank you so much!
Tju [1.3M]

Answer: The coefficients for the given reaction species are 1, 6, 2, 3.

Explanation:

The given reaction equation is as follows.

Cr_{2}O^{2-}_{7} + Cl^{-} \rightarrow Cr^{3+} + Cl_{2}

Now, the two half-reactions can be written as follows.

Reduction half-reaction: Cr_{2}O^{2-}_{7} + 3e^{-} \rightarrow Cr^{3+}

This will be balanced as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3+} + 7H_{2}O ... (1)

Oxidation half-reaction: Cl^{-} \rightarrow Cl_{2} + 1e^{-}

This will be balanced as follows.

6Cl^{-} \rightarrow 3Cl_{2} + 6e^{-} ... (2)

Adding both equation (1) and (2) we will get the resulting equation as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6Cl^{-} \rightarrow 2Cr^{3+} + 3Cl_{2} + 7H_{2}O

Thus, we can conclude that coefficients for the given reaction species are 1, 6, 2, 3.

6 0
3 years ago
A flask with a volume of 250.0 mL contains air with a density of 1.164 g/L. What is the mass of the air contained in the flask?
satela [25.4K]

Answer:

convert 250.0 mL in Liters :250. 0 / 1000 = 0,25 LDensity = 1.240 g/LMass

Explanation:

6 0
2 years ago
Children tend to resemble their parents in many ways; they may have like eye color, hair texture, height, or skin tone. This is
weeeeeb [17]

black would be BB .

dominant gene is B.

phenotyope is where it says white fur.

recessive gene is b.

white is bb

5 0
3 years ago
ANSWER FAST PLZ!!!!!!!!!
valina [46]
I think the answer is B
7 0
3 years ago
Read 2 more answers
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