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3 years ago

Please help me I’m not sure with that

Chemistry

2 answers:

Tems11 [23]3 years ago

8 0

Answer:

i cant see the picture sorry

Explanation:

Alex73 [517]3 years ago

5 0

What I can’t see the pic ?hhbc639l73773 ghcbhjbch

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How many moles of silver chloride are produced from 15.0 moles of silver nitrate

Ghella [55]

15.0 moles of silver chloride are produced.

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3 years ago

Half-life is always given in units of time

ad-work [718]

Yes, half life is always given in units of time, hope this helps

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3 years ago

If a given aqueous solution at 298 K contains [H+] = 1.0 × 10-9, what is the [OH-]?

Zinaida [17]

Answer:

Explanation:

$\frac{1x10}x^{-14} = 1x10^{-9} \\ x =1x10^{-5} \\\\[OH][H]= 1x10^{-14}$

The concetration can be found by dividing the water ph constant by the [H=] or [OH] to find the other

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3 years ago

How many moles of oxygen are needed to react with 100.0 grams of aluminum?

Tasya [4]

Answer:

Explanation:

8 0

3 years ago

A sample weighing 3.110 g is a mixture of Fe 2 O 3 (molar mass = 159.69 g/mol) and Al 2 O 3 (molar mass = 101.96 g/mol). When he

grandymaker [24]

Answer:

The mass fraction of ferric oxide in the original sample : $\frac{723}{3110}$

Explanation:

Mass of the mixture = 3.110 g

Mass of $Fe_2O_3=x$

Mass of $Al_2O_3=y$

After heating the mixture it allowed to react with hydrogen gas in which all the ferric oxide reacted to form metallic iron and water vapors where as aluminum oxide did not react.

$Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)$

Mass of mixture left after all the ferric oxide has reacted = 2.387 g

Mass of mixture left after all the ferric oxide has reacted = y

$x=3.110 g- y=3.110 g - 2.387 g = 0.723 g$

The mass fraction of ferric oxide in the original sample :

$\frac{0.723 g}{3.110 g}=\frac{723}{3110}$

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3 years ago