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3 years ago

15

Mr X was accused of speeding along a highway. He was travelling at different speeds,but an average speed of 80 km/h. Based on th

r given information, is Mr X gulity or innocent?

1 answer:

vladimir1956 [14]3 years ago

7 0

Mr x is guilty
hope u got ur and

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How many grams of hydrogen gas would be needed to form 8.0 grams of water? H2+O2=H2O

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8 H2= 0.90 g , hope that helps
you with your work

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3 years ago

What is a big plants <br>In the world <br>who can say <br>I want a answer<br>

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Answer:

Jupiter

Explanation:

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2 years ago

A 51.24-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 liters of solution. How many mL of this solution must be d

g100num [7]

Answer:

0.40 L

Explanation:

Calculation of the moles of $Ba(OH)_2$ as:-

Mass = 51.24 g

Molar mass of $Ba(OH)_2$ = 171.34 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{51.24\ g}{171.34\ g/mol}$

$Moles= 0.2991\ mol$

Volume = 1.20 L

The expression for the molarity is:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

$Molarity=\frac{0.2991\ mol}{1.20\ L}=0.24925\ M$

Thus,

Considering

$Molarity_{working\ solution}\times Volume_{working\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}$

Given that:

$Molarity_{working\ solution}=0.100\ M$

$Volume_{working\ solution}=1\ L$

$Volume_{stock\ solution}=?$

$Molarity_{stock\ solution}=0.24925\ M$

So,

$0.100\ M\times 1\ L=0.24925\ M\times Volume_{stock\ solution}$

$Volume_{stock\ solution}=\frac{0.100\times 1}{0.24925}\ L=0.40\ L$

<u>The volume of 0.24925M stock solution added = 0.40 L </u>

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2 years ago

the development and use of the ______ a common and important piece of laboratory equipment, led scientist to the discovery of se

Liula [17]

The answer is the Microscope.

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3 years ago

How many moles are in 5g of Al?<br><br>A.0.185<br>B.18.5<br>C.5.4<br>D.135

Lapatulllka [165]

I got 134.91 but if you round it you’ll get 135

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2 years ago

Read 2 more answers