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dusya [7]
3 years ago
15

The force that one surface exerts on another when the two rub against each other is called _

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

Answer:

friction

Explanation:

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erica [24]

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Explanation:

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3 years ago
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The proteins of all living things require<br> geometry of amino acids.
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As the building blocks of proteins , amino acids are linked to almost every life process, but they also have key roles as precursor compounds in many physiological processes.

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3 years ago
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When 125 mL of 0.150 M Pb(NO3)2 is mixed with 145 mL of 0.200 M KBr, 4.92 g of PbBr2 is collected. Calculate the percent yield.
Semenov [28]

Answer:

Y = 92.5 %

Explanation:

Hello there!

In this case, since the reaction between lead (II) nitrate and potassium bromide is:

Pb(NO_3)_2+2KBr\rightarrow PbBr_2+2KNO_3

Exhibits a 1:2 mole ratio of the former to the later, we can calculate the moles of lead (II) bromide product to figure out the limiting reactant:

0.125L*0.150\frac{molPb(NO_3)_2}{L} *\frac{1molPbBr_2}{1molPb(NO_3)_2} =0.01875molPbBr_2\\\\0.145L*0.200\frac{molKBr}{L} *\frac{1molPbBr_2}{2molKBr} =0.0145molPbBr_2

Thus, the limiting reactant is the KBr as it yields the fewest moles of PbBr2 product. Afterwards, we calculate the mass of product by using its molar mass:

0.0145molPbBr_2*\frac{367.01gPbBr_2}{1molPbBr_2} =5.32gPbBr_2

And the resulting percent yield:

Y=\frac{4.92g}{5.32g} *100\%\\\\Y=92.5\%

Regards!

4 0
3 years ago
I DARE YALL TO JOIN THIS MEET CODE IS cdabauer JOIN THEN HURRY UP AND LEAVE AND YOU WILL GET BRAINLY​
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Answer:

nah but ill take points tho

Explanation:

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2 years ago
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If a quadrilateral has three angels measuring 60, 45 and 100 find the measure of the fourth angel
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