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lukranit [14]
3 years ago
12

A substance is 35.7% carbon by mass. How much carbon could be recovered from 769g of substance?

Chemistry
2 answers:
vlabodo [156]3 years ago
7 0

Answer : The mass of carbon recovered from 769 grams of substance is 274.5 grams.

Explanation :

As we are given 35.7 % carbon by mass that means 35.7 grams of carbon present in 100 grams of substance.

Now we have to calculate the mass of carbon recovered from 769 grams of substance.

As, 100 grams of substance recovered 35.7 grams of carbon

So, 769 grams of substance recovered \frac{769}{100}\times 35.7=274.5 grams of carbon

Therefore, the mass of carbon recovered from 769 grams of substance is 274.5 grams.

ella [17]3 years ago
4 0
Below are the choice that can be found from other sources:

..22.9 
<span>2..274 </span>
<span>3..180 </span>
<span>4..2290 </span>
<span>5.1.80 </span>
<span>6..258 </span>
<span>7..Not Enough Info
</span>
Below is the solution:

0.357 * 769g = 274.533g 
i.e. the answer is 2) 274 grams

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
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A sample of carbon dioxide gas is reduced to 1/3 of its original volume while the pressure is observed to doubleplaced in a cont
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Answer:

The temperature will change and become 2/3 of its original.

Explanation:

Using Ideal gas equation for same mole of gas as

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

Given ,  

The volume of the sample gets reduced 1/3 of the original. So,

V₂ = 1/3V₁

The pressure of the sample is doubled of the original. So,

P₂ = 2P₁

Using above equation as:

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

\frac {{P_1}\times {V_1}}{T_1}=\frac {{2\times P_1}\times {\frac{1}{3}\times V_1}}{T_2}

T_2=\frac{2}{3}\times T_1

<u>The temperature will change and become 2/3 of its original.</u>

5 0
3 years ago
Can we used glass beaker instead of plastic cup for the calorimeter experiments?
Mice21 [21]
No, because plastic cups can be dissolved by organic compounds. Moreover, they are easily melted so a highly exothermic reaction can not be studied using them. 
4 0
4 years ago
If you are cooking bread, and you weigh the dough before baking and weigh the bread after baking, but they weigh 2 different amo
Nana76 [90]

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3 0
3 years ago
A liquid of density 1290 kg/m 3 flows steadily through a pipe of varying diameter and height. At Location 1 along the pipe, the
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Answer:

114 kPa

Explanation:

By Bernoulli's equation when a fluid flows steadily through a pipe:

P + ρ*g*y + v² = constant in the pipe, where P is the pressure, ρ is the density of the fluid, g is the gravity acceleration (9.8 m/s²), y is the high, and v the velocity.

By the continuity equation, the liquid flow must be constant in the pipe, and then:

A1*v1 = A2*v2

Where A is the area, v is the velocity, 1 is the point 1, and 2 the point 2 in the pipe. The are is the circle area: π*(d/2)². So:

π*(0.105/2)²*9.91 = π*(0.167/2)²*v2

0.007v2 = 0.027

v2 = 3.9 m/s

Then:

P1 + ρ*g*y1 + v1² = P2 + ρ*g*y2 + v2²

ρ*g*y1 - ρ*g*y2 + v1² - v2² = P2 - P1

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3 years ago
What type of bonds do inorganic compound make
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Inorganic compounds make ionic bonds.

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