2 years ago

What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.

Chemistry

1 answer:

mina [271]2 years ago

8 0

Answer:

46.8% should be. correct, I'm not fully sure though. : )

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A simple machine produces 25 joules of output work for every 50 joules of input work . What is the efficiency of this machine ?

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2:1, output is half the input

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3 years ago

If the ratio of the length of a rectangle to its width is 3 to 2, what is the

borishaifa [10]

Answer:

Length of a rectangle whose width is 4 inches is

<u>6 inches</u>

Explanation:

Ratio of length to its width is 3 to 2

Let length = L

Let Width = B

L: B = 3 : 2 (given)

$\frac{L}{B} =\frac{3}{2}$

Width ,B = 4

Insert B in above equation

$\frac{L}{B} =\frac{3}{2}$

$\frac{L}{4} =\frac{3}{2}$

cross multiply,

$L = \frac{3}{2}\times4$

L = 6 inches

Conversion(if required) ,

1 inch = 2.54 cm

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3 years ago

1. A contour line represents a single equal elevation: that is, all points on the same contour line have the same elevation.

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The answer is hard to give without any information.

3 0

1 year ago

When solutions of silver nitrate and sodium chloride are mixed, silver chloride precipitates out of the solution according to th

kipiarov [429]

The concentration of the sodium chloride would be 0.082 M

<h3>Stoichiometric calculations</h3>

From the equation of the reaction, the ratio of AgCl produced to NaCl required is 1:1.

Mole of 46.6 g AgCl produced = 46.6/143.32 = 0.325 moles

Equivalent mole of NaCl = 0.325 moles.

Molarity of 0.325 moles, 3.95 L NaCl = mole/volume = 0.325/3.95 = 0.082 M

More on stoichiometric calculations can be found here: brainly.com/question/27287858

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2 years ago

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Well you would think yeah because it’s a liquid but the answer is no

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3 years ago