CHEMISTRY MIDDLE SCHOOL

Which generally occurs as temperature increases?

Answers

Answer 1
Answer:

Solubility increases.
Answer 2
Answer:

Answer:

solubility increases

Explanation:

For example with gases dissolved in liquids, a rise in temp would decrease solubility. There are even some solid in liquid soln where increasing temps decreases solubility.

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Which volume is the smallest?A. One milliliterB. One deciliterC. One literD. One microliter

What is the charge on an electron?

Answers

The Charge is negative= 1.6 x 10^-19C

What is the formula mass of calcium sulfate dihydrate [CaSO4⋅2H2O]?Be sure to add the water of hydration, which is the 2H2O part (water surrounding the calcium sulfate).


136 g/mol


154 g/mol


164 g/mol


172 g/mol


172 is correct

Answers

Answer:

Option d = 172 g/mol

Explanation:

Formula mass of [CaSO₄.2H₂O]

Formula mass = 40.078 + 32.065 + 4×16 + 4 + 16×2

Formula mass = 40.078 + 32.065 + 64 + 4 + 32

Formula mass = 172.143 g/mol

so, 172 g/mol is the correct answer.

The formula mass of compound calcium sulfate dihydrate is 172 g/mole.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

The formula mass of compound = 40+32+16×4+4+32=172 g/mole.

Learn more about compound,here:

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What can natural selection accomplish? prove Darwin's idea of "survival of the fittest" change relative number of inhabitants within a community favor a particular variety (color or size) of a species change one kind of organism into another in order to surviv

Answers

A classic example of natural selection is the origin of giraffes long necks. The ancestors of modern giraffes were similar to deer with necks of ordinary length. Here natural selection accomplish  Darwin's idea of "survival of the fittest". The correct option is A.

What is natural selection?

The mechanism through which living creature populations adapt and change is defined as the natural selection. The genes which are responsible for the survival of an organism are passed on to the successive generations.

Natural selection states that the organisms which are able to survive and reproduce with the changing environmental conditions are selected by the nature whereas the ones which cannot survive are eliminated.

So the survival of fittest means that the organisms which are suited to the environment will survive. Survival of the fittest is an expression developed from Darwin's theory of evolution.

Thus the correct option is A.

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Natural selection makes it so that an organism from a species has a better chance of surviving than an organism in the same species, but with different traits. Survival of the fittest proves that certain traits can help an organisms survive better than its peers. For example, say there was an allele that made bears have thicker fur than others. The year-round climate is extremely cold. The bears with thicker fur are more likely to survive due to the warmth their fur provides and will have more offspring. The bears with thinner fur will die more often and not produce healthy offspring due to the frigid temperature. Eventually, the allele for thin fur will die out because the bears with these alleles cannot survive in their habitat.

I’m general,what was would a scientist do after forming a testable question

Answers

Develop a hypothesis.

How are evaporation and condensation alike

Answers

well,condensation is more like gas becoming liquid or solid while evaporation is liquid becoming gas.

the thing those two have in common is that they have been gas or are gas.
Condensation changes gas to solid/liquid. Evaporation turns liquid into gas

What color is Uranus

Answers

Blue. I just did a project of Uranus. So I hope it helps
Blue due to the gases and the lack of oxygen, due to it being a gas planet. 
Also, the fact that it is so far away from the sun means that it's not gonna be red! :D 
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