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3 years ago

How would you combine reactions A–C, shown below, to obtain the overall reaction: $$ Please select all that apply.

Chemistry

1 answer:

snow_lady [41]3 years ago

4 0

Answer:

By eating a sandwich

Explanation:

your welcome nigel

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Atoms of a substance are rearranged _______.

Yanka [14]

Atoms are never rearranged

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3 years ago

Identifying the Reddish-Brown Substance (continued)

antiseptic1488 [7]

Here's link to the answer:

tinyurl.com/wpazsebu

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3 years ago

A bucket of water contains 5.45 L of water, how many mL of water is this ?

nalin [4]

Answer: It is 5450 mL

Explanation: There are 1000 mL in every L and then there is an extra 450 so just add that at the end

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4 years ago

A gas has a pressure of 5.7 atm at 100.0°C. What is its pressure at20.0°C (Assume volume is unchanged)

son4ous [18]

Answer:

$\large \boxed{\text{4.5 atm}}$

Explanation:

The volume and amount of gas are constant, so we can use Gay-Lussac’s Law:

At constant volume, the pressure exerted by a gas is directly proportional to its temperature.

$\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}$

Data:

p₁ =5.7 atm; T₁ = 100.0 °C

p₂ = ?; T₂ = 20.0 °C

Calculations:

1. Convert the temperatures to kelvins

T₁ = (100.0 + 273.15) K = 373.15

T₂ = (20.0 + 273.15) K = 293.15

2. Calculate the new pressure

$\begin{array}{rcl}\dfrac{5.7}{373.15} & = & \dfrac{p_{2}}{293.15}\\\\0.0153 & = & \dfrac{p_{2}}{293.15}\\\\0.0153\times 293.15 &=&p_{2}\\p_{2} & = & \textbf{4.5 atm}\end{array}\\\text{The new pressure will be $\large \boxed{\textbf{4.5 atm}}$}$

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3 years ago

73.4 km to m then answer in correct number of significant numbers

Fittoniya [83]

Answer:

To determine the number of significant figures in a number use the following 3 rules:

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.Any zeros between two significant digits are significant.

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.Any zeros between two significant digits are significant.A final zero or trailing zeros in the decimal portion ONLY are significant.

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2 years ago