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3 years ago

9

Please help me with this question after I have help with my questions i will be giving away 50 points to 4 people to keep on the

look out on my page xxx

2 answers:

Masteriza [31]3 years ago

7 0

Answer:

I swear I would help if I knew what the hell was going on on that picture XD

pickupchik [31]3 years ago

4 0

Answer:

D

Explanation:

factors like heat on mcls work on a bell curve, meaning they peak and go down

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Na2S+2AgNO3 = Ag2S + NaNO3 If 2.86g of Ag2S are actually produced by a reaction between an excess of Na2S and 4.27g of AgNO3 the

Advocard [28]

Answer:

D. 91.0%

Explanation:

Hello,

In this case, for the given chemical reaction:

$Na_2S+2AgNO_3 \rightarrow Ag_2S + 2NaNO_3$

Next, since silver nitrate (molar mass 169.87 g/mol) is in a 2:1 molar ratio with silver sulfide (molar mass 247.8 g/mol), we compute its theoretical yield as shown below:

$m_{Ag_2S}^{theoretical}=4.27gAgNO_3*\frac{1molAgNO_3}{169.87gAgNO_3} *\frac{1molAg_2S}{2molAgNO_3}*\frac{247.8gAg_2S}{1molAg_2S}\\\\m_{Ag_2S}^{theoretical}=3.11gAg_2S$

Next, we compute the percent yield as:

$Y=\frac{m_{Ag_2S}^{actual}}{m_{Ag_2S}^{theoretical}}*100\% =\frac{2.86g}{3.11g} *100\%\\\\Y=91.0%$

Hence, answer is D. 91.0%.

Best regards.

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4 years ago

What is the amount of salt dissolved in a body of water?

Mars2501 [29]

The term is salinity, is that what you were looking for?

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4 years ago

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How many moles are there in 5.24 Liters of NH3 gas at STP?

igor_vitrenko [27]

Answer:

34.3

Explanation:

3 0

3 years ago

A<br> is often written as an if/then statement.<br> O prediction<br> O law<br> O theory<br> O guess

frosja888 [35]

The answer is theory because it says if and that means theory

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3 years ago

What is the molarity of 0.8 moles of KCL in 2L of solution

vivado [14]

Answer:

The molarity is 0,4M

Explanation:

The molartity is moles of compound (in this case KCl) in 1 liter of solution :

2 L----------0,8 moles KCl

1 L-----------x= (1L x0,8 moles KCl)/2L= 0,4 moles KCl--> 0,4M

6 0

3 years ago