CHEMISTRY MIDDLE SCHOOL

1. What is the maximum amount of NaCl that can dissolve in200 g of water? (The solubility of NaCl is 35 g/100 g H20 at
20°C.) *

Answers

Answer 1

Answer:

Answer:

70g

Explanation:

Rate = 35g of NaCl can dissolve in 100g of H2O

Use proportions for 200g of H2O:

$(35)/(100) = (x)/(200)$

Since 200 is double of 100, x needs to be double of 35.

$(35)/(100) = (70)/(200)$

Therefore the maximum amount of NaCl that can dissolve in 200g of water is 70g.

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I’m which of the following kingdoms are prokaryotes found?i need help ASAP please help

Answers

Don’t Put this as your answer

Which statement best explains the relationship between an area's geography and the temperature of its surface water?A.) Areas at low latitudes have the warmest water because they have the least change in temperature throughout the year.

B.) Areas at low latitudes have the warmest water because they receive the most direct sunlight.

C.) Areas at high latitudes have the warmest water because they have the longest seasons.

D.) Areas at high latitudes have the warmest water because their days are the longest.

Answers

Areas at low latitudes have the warmest water because they have the least change in temperature throughout the year. Therefore, option A is correct about the relationship between a geographical area and surface water temperature.

What is temperature change with altitudes ?

Ocean temperatures typically range from -2o to 30o C. (28-86o F). Surface water in low latitude regions tends to be the warmest, whereas surface water at the poles is obviously much colder It is worth noting that water on the eastern side of the ocean basins is colder than water on the western side at equivalent latitudes.

Despite the fact that surface water can be quite warm, the majority of the water in the oceans is deeper, colder water, so the average temperature of the entire ocean is around 4° C, which is roughly the temperature inside your refrigerator.

Therefore, the lower altitudes is having warmest water than that at higher altitudes.

Find more on altitudes:

brainly.com/question/4390102

#SPJ2

Answer:

Explanation:

Low Latitudes get the most sunlight, sunlight causes the water to warm up.

If 112 g of iron (Fe) combines with 24 g of oxygen (o2) how much iron oxide is formed

Answers

There are three different oxides of iron: FeO, Fe2O3 (hematite), and Fe3O4 (magnetite). Assuming that the iron oxide formed in this problem is Fe2O3, which is the most common form of iron oxide, the calculations are as follows:

Balanced chemical equation:
4Fe + 3O2 --> 2Fe2O3
i 2 0.75 0
c 1 0.75 0.5
e 1 0 0.5

Moles Fe = 112g /55.845 = 2
Moles O2 = 24/32 = 0.75

The reaction, with an excess of 1 mol Fe, produced 0.5 moles or 0.5 moles(159.69g/mol) = 79.845 grams of Fe2O3.

An easy way to understand:

136 g Fe2O3

Why are the surface temperature on the moon more extreme than the surface temperature on earth

Answers

Because The moon doesn't have an atmosphere unlike Earth.

The surface temperature on the moon more extreme than the surface temperature on earth because the moon doesn't have an atmosphere.

Help ASAP This diagram shows a step in a reaction where one kind of amino acid is converted into another king of amino acid. Which statement best describes what occurs during this step.

A. ATP transfers a phosphate group to the original amino acid molecule and becomes ADP.

B. An ATP molecule and an amino acid molecule fit into separate holding spot on the same enzyme.

C. The addition of the new molecule to the original amino acid molecule transforms the original amino acid into a new amino acid

D. The original molecule amino acid, which is now unstable, reacts easily with another molecule and releases the attached phosphate.

Answers

The answer is; A

This process shown in the diagram is called phosphorylation. Phosphorylation is a significant biochemical process in the body since it is able to activate or deactivate molecules by influencing their chemical properties. An example of a significant phosphorylation process is that of the p53 tumor suppressor protein which is activated by the phosphorylation process.

Answer:

The original amino acid molecule, which is now unstable, reacts easily with another molecule and releases the attached phosphate.

Explanation:

i took the quiz

and i used the other persons but it was wrong it's this :)

Hope it helps :D

How do some deep-water bacteria in the ocean make food?

Answers

Answer:

They make food by using chemosynthesis.

Explanation:

Final answer:

Deep-water bacteria, known as chemoautotrophs, make their own food through a process called chemosynthesis, using chemicals like hydrogen sulfide from hydrothermal vents instead of sunlight.

Explanation:

Some deep-water bacteria in the ocean are known as chemoautotrophs, which can produce their own food by using chemical energy from hydrothermal vents. Unlike plants, they do not use sunlight for photosynthesis. Instead, they rely on chemosynthesis for their energy supply. In this process, bacteria convert chemicals from the vents into usable energy or food. For example, some bacteria use hydrogen sulfide, a chemical abundant in the deep ocean, for chemosynthesis. This biological process allows these deep-water bacteria to thrive in environments where sunlight is not available.