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2 years ago

Does science support the idea that humans have influenced global warming? Provide

Chemistry

1 answer:

Blizzard [7]2 years ago

4 0

Answer:Science has established that human activity is to blame for global warming.

The extensive combustion of fuels by humans contributed to the ozone layer's depletion by producing greenhouse gases.

An illustration of how two people with opposing viewpoints could argue while compiling information and reports on climate change

With the increase in carbon dioxide, the greenhouse effect may be contested.

Someone else will counterargue that a volcanic explosion caused the climatic change.

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What is the mass of 61.9 L of oxygen gas collected at STP?

Tcecarenko [31]

Answer:

D. 44.2 g O₂

General Formulas and Concepts:
Gas Laws

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Stoichiometry

Dimensional Analysis
Mole Ratio

Explanation:

Step 1: Define

Identify given.

61.9 L O₂ at STP

Step 2: Convert

We know that the oxygen gas is at STP. Therefore, we can set up and solve for how many moles of O₂ is present:

$\displaystyle 61.9 \ \text{L} \ \text{O}_2 \bigg( \frac{1 \ \text{mol} \ \text{O}_2}{22.4 \ \text{L} \ \text{O}_2} \bigg) = 2.76339 \ \text{mol} \ \text{O}_2$

Recall the Periodic Table (Refer to attachments). Oxygen's atomic mass is roughly 16.00 grams per mole (g/mol). We can use a mole ratio to convert from moles to grams:

$\displaystyle 2.76339 \ \text{mol} \ \text{O}_2 \bigg( \frac{16.00 \ \text{g} \ \text{O}_2}{1 \ \text{mol} \ \text{O}_2} \bigg) = 44.2143 \ \text{g} \ \text{O}_2$

Now we deal with sig figs. From the original problem, we are given 3 significant figures. Round your answer to the exact same number of sig figs:

$\displaystyle 44.2143 \ \text{g} \ \text{O} \approx \boxed{ 44.2 \ \text{g} \ \text{O}_2 }$

∴ our answer is letter choice D.

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Topic: AP Chemistry

Unit: Stoichiometry

6 0

2 years ago

Two chemist are trying to determine if their water sample is a mixture or pure substance. In their investigation they first filt

Effectus [21]

The correct answer is option B. Dirty water is a mixture of solid particles and liquid. It is both a mixture and pure substance.

The dirty water sample has both gravel and liquid water in it. After filtration the gravel is removed so the water sample looks clearer than before filtration. Liquid water is a pure substance because it is a compound that is made up of elements hydrogen and oxygen. Now the gravel is only physically combined with the liquid water, thus giving the water sample properties of a mixture. And like any mixture, gravel is physically separated through filtration from the liquid water.

Thus the water sample of the chemists is both a mixture and pure substance.

8 0

4 years ago

Which substance would cool down faster concrete or iron

Olin [163]

Personal experience from Ag Mech classes-Concrete cools faster than metal.

7 0

3 years ago

Polllination refers to the ___________

Alchen [17]

Explanation:

from internet

the act of transferring pollen grains from the male anther of a flower to the female stigma

3 0

3 years ago

Read 2 more answers

What could be done to increase the acceleration of a dog sled? List two possibilities

snow_lady [41]

To increase the acceleration of the dog sled, increase the applied force on the sled and reduce the mass on the sled.

According to Newton's second law of motion, the force applied to an object is directly proportional to product of mass and acceleration of the object.

F = ma

where;

a is the acceleration of the dog sled

$a = \frac{F}{m} \\\\$

To increase the acceleration of the dog sled:

Increase the applied force on the sled.
Reduce the mass on the sled.

Learn more about Newton's second law here: brainly.com/question/3999427

3 0

3 years ago