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2 years ago

The fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?

Chemistry

1 answer:

matrenka [14]2 years ago

3 0

Answer:

s= 3.20 mph

Explanation:

s=t/d

s=380miles/5hours

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Which solution whose POH is 12

lesya692 [45]

Answer:

Explanation:

H3O =1×10_12=12 ooh is 12

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3 years ago

How do i find the mass of oxygen in 250 grams of sulfuric acid?

Mashutka [201]

<span> <span> 250g H2SO4 x 1moleH2SO4/ 98g mole H2SO4 x 4moles Oxygen/1moleH2SO4 x 1moleOxgen/16g Oxygen
= 163.27g Oxygen

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4 years ago

A reaction of 41.9 g of Na and 30.3 g of Br2 yields 36.4 g of NaBr . What is the percent yield?

Licemer1 [7]

Answer: The percent yield is, 93.4%

Explanation:

First we have to calculate the moles of Na.

$\text{Moles of Na}=\frac{\text{Mass of Na}}{\text{Molar mass of Na}}=\frac{41.9g}{23g/mole}=1.82moles$

Now we have to calculate the moles of $Br_2$

${\text{Moles of}Br_2} = \frac{\text{Mass of }Br_2 }{\text{Molar mass of} Br_2} =\frac{30.3g}{160g/mole}=0.189moles$

${\text{Moles of } NaBr} = \frac{\text{Mass of } NaBr }{\text{Molar mass of } NaBr} =\frac{36.4g}{103g/mole}=0.353moles$

The balanced chemical reaction is,

$2Na(s)+Br_2(g)\rightarrow 2NaBr$

As, 1 mole of bromine react with = 2 moles of Sodium

So, 0.189 moles of bromine react with = $\frac{2}{1}\times 0.189=0.378$ moles of Sodium

Thus bromine is the limiting reagent as it limits the formation of product and Na is the excess reagent.

As, 1 mole of bromine give = 2 moles of Sodium bromide

So, 0.189 moles of bromine give = $\frac{2}{1}\times 0.189=0.378$ moles of Sodium bromide

Now we have to calculate the percent yield of reaction

$\%\text{ yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100=\frac{0.353 mol}{0.378}\times 100=93.4\%$

Therefore, the percent yield is, 93.4%

3 0

3 years ago

33 protons 36 electrons 45 neutrons

Artist 52 [7]

As has an atomic number of 33, so it has 33 protons.

It has a charge of 3-, so there are three more electrons than protons. Thus, there are 36 electrons.

It has a mass of 75, which is the sum of neutrons and protons.

33+n=75 ---> n = 75 - 33 = 42 neutrons

The answer is e) 33 protons, 42 neutrons and 36 electrons.

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4 years ago

What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen?

makkiz [27]

8.0g's of water is your answer

4 0

3 years ago

Read 2 more answers

The fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?​

The fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?