2 years ago

1.(03.02 LC) Which of the following best defines weather? (3 points)

Chemistry

1 answer:

Monica [59]2 years ago

8 0

The atmospheric conditions at a particular time.

i did the test.

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Coke is an impure form of carbon that is often used in the in- dustrial production of metals from their oxides. If a sample of c

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Answer:

The mass of coke needed to react completely with 1.0 ton of copper(II) oxide is 0.794 Ton.

Explanation:

$2CuO+C\rightarrow 2Cu+CO_2$

1 Ton = 907185 grams

Mass of copper oxide = 1.0 Ton = 907185 grams

Moles of copper oxide = $\frac{907185 g}{79.55 g/mol}=11,403.95 moles$

According to reaction, 2 moles of copper oxide reacts with 1 mole of carbon.

Then 11403.95 moles of copper oxide will react with:

$\frac{1}{2}\times 11403.95 mol=5,701.98 mol$ of carbon

Mass of 5,701.98 moles of carbon:

$5,701.98 mol\times 12 g/mol=68,423.75 g$

Mass of coke = x

Mass of carbon = 68,423.75 g

Percentage of carbon in coke = 95%

$95\%=\frac{68,423.75 g}{x}\times 100$

$x=720,250.09 g=0.794 Ton$

The mass of coke needed to react completely with 1.0 ton of copper(II) oxide is 0.794 Ton.

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Describe the relationship between the light-dependent and the light-independent reactions.

Slav-nsk [51]

The products of the light-dependent reactions are used to help 'fuel' the light-independent reactions.

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NADPH and ATP are produced during the light-dependent reaction for use in the light-independent reaction (the Calvin Cycle).

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Which pair of elements is MOST likely to chemically combine and form ionic bonds?

dsp73

The right answer for the question that is being asked and shown above is that: "C. carbon and hydrogen." The pair of elements is MOST likely to chemically combine and form ionic bonds are carbon and hydrogen

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A car moves at a speed of 50 kilometers/hour. Its kinetic energy is 400 joules. If the same car moves at a speed of 100 kilomete

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ke prop to v^2

ke1/v1^2=ke2/v2^2

400/50x50=joules/100x100

400x2x2

1600j

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There is 3800 mmHg in 5 atm

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