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2 years ago

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A 2.0 L flask contains nitrogen and oxygen gases at 25°C. The total pressure is 0.91 atm and contains 0.050 mol of nitrogen. Cal

culate the partial pressure of oxygen and moles of oxygen present

1 answer:

iVinArrow [24]2 years ago

7 0

Answer:

.025 ml 02

Explanation:

I made a pdf and pasted it in and etc

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How is a nonrenewable source different from a renewable one

Lady bird [3.3K]

A Nonrewnewable source is hard to get back from its source, while a renewable source is easy to get back from its source.

Example:

Nonrenewable: crude oil, oil, coal, fossil fuels, etc.

Renewable: sunlight, wind, biomass, rain, tides, waves and geothermal heat, etc.

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2 years ago

Water has a heat capacity of 4.184J/g C. If 50 g of water has a temperature of 30°C and as added to the water causing the

Irina-Kira [14]

Answer is 3 so correct answer is 3

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2 years ago

Why might the presence of kudzu make it difficult for other plants to compete for resources?

Bingel [31]

Answer:

Kudzu kills trees and other plants by smothering and choking them with its fast-growing vines, and as the heavy vines engulf trees or shrubs their weight can actually break or uproot trees. A kudzu vine can grow as much as a foot per day and sixty feet during a growing season.

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2 years ago

How many molecules are in 100. l of potassium hydroxide solution at stp?

sleet_krkn [62]

Answer : There are $2.68\times 10^{24} molecules$ in 100 Lof potassium hydroxide(KOH) solution at stp.

Explanation : To calculate the molecules we first need to find out the moles.

One mole of an ideal gas will occupy a volume of 22.4 liters at STP (Standard Temperature and Pressure, 0°C and one atmosphere pressure).

1 mole = 22.4 L

100 L = $(100 L)\times \frac{(1mole)}{(22.4 L)}$

100 L = $(100)\times \frac{(1mole)}{(22.4)}$

100 L = 4.46 mole potassium hydroxide(KOH)

Now , we need to convert 4.46 mole to molecules of KOH.

$1 mole = 6.02\times 10^{23} molecules$

4.46 moles = $(4.46 mole)\times \frac{(6.02\times 10^{23}molecules)}{(1 mole)}$

4.46 moles = $(4.46)\times \frac{(6.02\times 10^{23}molecules)}{(1 )}$

4.46 moles = $2.68\times 10^{24} molecules$

There are $2.68\times 10^{24} molecules$ in 100 Lof potassium hydroxide(KOH) solution at STP.

7 0

2 years ago

What is the mass number of an atom that has 19 protons, 19 electrons, and 20 neutrons?

kolezko [41]

Answer:

$\boxed {\boxed {\sf 39}}$

Explanation:

The mass number of an atom can be found by adding the number of protons and neutrons.

$mass \ number =protons + neutrons$

There are 19 protons and 20 neutrons.

$protons=19 \\neutrons=20$

$mass \ number= 19+20$

$mass \ number =39$

The mass number of this atom is <u>39</u>

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2 years ago