I need somebody to help me with my homework pls i dont get it .

Answers

Answer 1

Answer: 26. B
27. D
28. C
Hope this helped ☺️

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The greenhouse effect A. is caused by pollution released into the atmosphere
B. does not occur naturally
C. is a naturally occurring process
D. needs to be reversed to save the planet

Answers

The greenhouse effect C. is a naturally occurring process. What many people fail to realize is that the greenhouse effect is what keeps our Earth warm and habitable for us to live on. Without the greenhouse effect, the Earth would be colder and would not be able to sustain life.

How many atoms of hydrogen are in 24.4 g of methane?

Answers

Answer:

The number of atom is 3.67*10^24 atoms

Explanation:

Molar mass of methane CH4 is 16.0g/mol

Using this to divide the mass

24.4g/16.0 = 1.525mol

1 mol CH4 contains 1 mol of Carbon C and 4 mol of hydrogen H, so 1.525mol contains 4(1.525)=6.1 molH

Using avogadro number : (6.1mol)(6.02*10^23)

= 3.67*10^24 atoms

Final answer:

There are 3.66 × 10^24 hydrogen atoms in 24.4 g of methane (CH4). This is calculated by first finding the number of moles of CH4 and then using Avogadro's number to determine the total number of molecules, which is finally multiplied by 4 (the number of hydrogen atoms per CH4 molecule).

Explanation:

The question asks how many atoms of hydrogen are in 24.4 g of methane (CH4). Methane has a molecular formula of CH4, indicating that each molecule contains 4 hydrogen atoms. The molar mass of methane is 16.04 g/mol (12.01 g for carbon + 4 × 1.008 g for hydrogen).

First, calculate the number of moles of methane:

24.4 g CH4 × (1 mol CH4 / 16.04 g CH4) = 1.52 mol CH4

Then, multiply by Avogadro's number to find the total number of methane molecules:

1.52 mol CH4 × (6.022 × 1023 molecules/mol) = 9.15 × 1023 molecules of CH4

Since each molecule of methane has 4 hydrogen atoms, we get:

9.15 × 1023 molecules CH4 × (4 H atoms/molecule) = 3.66 × 1024 hydrogen atoms.

.A diorama is a type of model. Marcy built a diorama of a forest. She put small models of trees, birds, and deer in the diorama. She also put rocks and moss on the bottom of her diorama. What does her diorama represent?

a museum display
an ecosystem
an animal
distances across Earth's surface

Answers

The diorama represents an ecosystem

Answer:

C I took this test yesterday

Explanation:

The density of gold is 19.3 g /cm cubed The density of iron pyrite is 5.0 g /cm cubed. Is a nugget of iron pyrite and a nugget of gold each have a mass of 50 g what can you conclude about the volume of each nugget

Answers

If you clear volume in the density equation:

$\rho = (m)/(V)\ \to\ V = (m)/(\rho)$

The greater the density the lower the volume. This means, the volume of gold nugget will be smaller than the volume of iron pyrite nugget.

$V_(gold) = (m)/(\rho) = (50\ g)/(19.3\ g/cm^3) = \bf 2.59\ cm^3$

$V_(iron) = (m)/(\rho) = (50\ g)/(5.0\ g/cm^3) = \bf 10\ cm^3$

Flooding,wildfire,landslides and climate change would lead to

Answers

World destruction because wildfire and not good you grass and trees landslides bring all the dirt and trees from forests to the ocean flooding destroys houses

world destruction,
because if a lot of this happens, poor earth, it will die.
hope that this helps you!!

How hot or cold something is

Answers

How hot or cold something is the temperature and its measured by a thermometer

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You have been given an orange liquid and told to describe its properties. What methods would you use to observe, measure, and describe the physical properties of this orange liquid without changing it?

Which of the following is true for a reliable scientific source