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2 years ago

Record 4 concepts you learned from Matter, properties and Phases. It’s due today!!!

1 answer:

3 0

Answer: Four concepts I’ve learned from Matter,properties, and phases is that matter is made up of 3 things solid,liquid, and gas and is what the earth is made up of. Properties are the characteristics of an object (characteristics of matter). Phases are something that things can go through such as a chemical change or a caterpillar turning to a butterfly, they are all phases.

Explanation: <3 I really hope this helped!

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Which statement best describes scientific laws? Scientific laws are facts that describe natural events. Scientific laws are theo

Fiesta28 [93]

Well scientific laws are really laws! You can't change a scientific law and laws can be facts as well. Hope this helps!

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3 years ago

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What is the mass in grams of 5.50 mol of sodium?

Zolol [24]

Answer:

126.5g

Explanation:

n=m

where n is moles

m is mass of substance

M is molar mass

molar mass of sodium is 23g/mol

m=nM

m=5.5(23)

m=126.5

8 0

3 years ago

Cavendish’s name for hydrogen gas was "inflammable air." The word inflammable means "to burn. "Why did Cavendish use this name?

saul85 [17]

He used that name because if you lit hydrogen on fire it would catch. therefore, it was dangerous to be around. think of it as a kind of warning. :) hope that helps.

8 0

3 years ago

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The equilibrium constant has been estimated to be 0.12 at 25 °C. If you had originally placed 0.069 mol of cyclohexane in a 2.8

scZoUnD [109]

Answer: Concentrations of cyclohexane and methylcyclopentane at equilibrium are 0.0223 M and 0.0027 M respectively

Explanation:

Moles of cyclohexane = 0.069 mole

Volume of solution = 2.8 L

Initial concentration of cyclohexane = $\frac{moles}{Volume}=\frac{0.069}{2.8}=0.025M$

The given balanced equilibrium reaction is,

cyclohexane ⇔ methylcyclopentane

Initial conc. 0.025 M 0

At eqm. conc. (0.025-x)M (x) M

The expression for equilibrium constant for this reaction will be,

K= methylcyclopentane / cyclohexane

Now put all the given values in this expression, we get :

$0.12=\frac{(x)}{(0.025-x)}$

By solving the term 'x', we get :

x = 0.0027

Concentration of cyclohexane at equilibrium = (0.025-x ) M = (0.025-0.0027) M = 0.0223 M

Concentration of methylcyclopentane at equilibrium = (x ) M = (0.0027) M

4 0

3 years ago

Please help me with this thank you <3

butalik [34]

Answer:

C and D

Explanation:

Claims based on science are claims that can be backed up by data and evidence. In the sentence "Data from ice cores show that global temperatures are rising dramatically.", the part "Data from" inclines that there is factually proof backing up the claim. Part of the sentence "Satellite imagery shows.." inclines that there is also proof/evidence backing this claim. The other two sentences are opinions based on science. Instead, they should give some sort of data/evidence that would support that claim.

4 0

2 years ago

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