3 years ago

Need help with these (This is how i got the DOC)

Chemistry

1 answer:

katen-ka-za [31]3 years ago

6 0

I don’t see a picture love

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A measurement 172.54 m rounded to three significant figures is

xxTIMURxx [149]

173.00m
Step by step explanation
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2 years ago

4. What is a homogeneous solution? Give an example.

Gennadij [26K]

Answer:

Homogeneous solutions are solutions with uniform composition and properties throughout the solution.

Explanation:

For example a cup of coffee, perfume, cough syrup, a solution of salt or sugar in water, etc. Heterogeneous solutions are solutions with non-uniform composition and properties throughout the solution.

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1 year ago

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If 14.5 g of MnO4- (permanganate) react with manganese (II) hydroxide how many grams of manganese (IV) oxide will be produced? T

Veronika [31]

Answer:

$m_{MnO_2}=21.2gMnO_2$

Explanation:

Hello,

In this case, given the balanced reaction:

$2MnO_4^-+2Mn(OH)_2\rightarrow 4MnO_2+2OH^-+H_2O$

We can see a 2:4 mole ration between permanganate ion (118.9 g/mol) and manganese (IV) oxide (86.9 g/mol), that is why the resulting mas of this last one turns out:

$m_{MnO_2}=14.5gMnO_4^-*\frac{1molMnO_4^-}{118.9gMnO_4^-}*\frac{4MnO_2}{2molMnO_4^-} *\frac{86.9gMnO_2}{1molMnO_2} \\\\m_{MnO_2}=21.2gMnO_2$

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3 years ago

What are all synthetic materials made from?

dolphi86 [110]

Answer:

Natural resources

Explanation:

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2 years ago

What is the mass of the question?

musickatia [10]

Answer: I do not know

Explanation:

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