2 years ago

20. Stoichiometry is based on

Chemistry

2 answers:

Mariana [72]2 years ago

5 0

Answer:

The correct option is (c)

natita [175]2 years ago

3 0

Answer:

the law of conservation of mass

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Convert 75 minutes to days

Lostsunrise [7]

Answer:

75 minutes=0.0520833 days

Explanation:

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2 years ago

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Henok is observing the reaction rate of a chemical reaction. He then adds a catalyst to the reaction.

tia_tia [17]

A catalyst will ALWAYS increase the reaction rate so C

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2 years ago

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:

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

Best regards.

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3 years ago

Which term best describes the type of bonding in magnesium chloride

max2010maxim [7]

Ionic would be the answer

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2 years ago

Question 1:

Alona [7]

Question 1:

(a) Sulfurous acid: H2SO3

Sulfuric acid: H2SO4

(b) Nitrous acid: H2NO2

Nitric acid: H2NO3

Question 2:

To calculate the pH, based on concentration of H+ ions, there is one formula:

$ph = - log_{10}(c(h + ))$

So the pH of this solution is

$- log_{10}( {10}^{ - 9} ) = 9$

(the solution is basic).

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2 years ago