CHEMISTRY MIDDLE SCHOOL

Write number then solution!!!!!!!!!!!

Answers

Answer 1

Answer:

Answer:

1- waxing gibbous

2- third quarter

3- waxing crescent

4- full moon

5- waning crescent

6- new moon

7- first quarter

8- waning gibbous

Explanation:

hope that helps

Answer 2

Answer: Pain and suffering

Pain and suffering

Pain and suffering

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Which of these statements explains the relationship among elements, compounds, and mixtures? A. Elements are made of compounds and mixtures. B. Both compounds and mixtures are made up of elements. C. Mixtures are made of elements, and elements are made of compounds. D. Compounds are made of mixtures, and mixtures are made of elements.

Answers

the answer is answer D

Answer:

Its B, both compounds and mixtures are made up of elements.

1) What is the mass of 5.24 moles of Fe504-7H2O?

Answers

Answer:

Ok; first of all, you must correct the Molecular Formula; FeSO4•7H20

So, work out the Molar Mass;,

(4x18)O+ 55.? Iron + 32 Sulphur, PLUS

(7x 18) H2O = 1 molar mass.

Now, take that times 5.24, show your work & check the Mol. Weights, I am going by memory.

Oxygen

Explanation:

Convert 43.0 grams of SiH4 to moles

Answers

The number of moles in the 4.30 g of SiH₄ is 1.338 moles.

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

To calculate the moles

The molar mass of SiH₄ is 32.12 g

The mass of SiH₄ is 43.0 g

$\rm Number\;of \;moles= (mass)/(molar\;mass)\n\n\rm Number\;of \;moles= (43.0)/(32.12) = 1.338\; mol$

Thus, the number of moles in the 4.30 g of SiH₄ is 1.338 moles.

Learn more about moles

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43.0 grams of SiH4 converts to 1.338 moles.

What is the layer of the earths atmosphere that we live in

Answers

The layer that we live in is the Troposphere.
Hope this answer is correct.

The ______ parts of organisms are most likely to become fossils.

Answers

The hard parts of an organism, such as shells and bones.

hard parts of organisms are mist likely to become fossils

Most covalent compounds are very ______ electrolytes in solutions. A. Strong
B. Weak
C. Acidic
D. Flammable

Answers

i think the answer is A but im not 100% sure.