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Elden [556K]
3 years ago
11

2) Write a hypothesis for the Observation and question below. Be sure to use the proper “If…, then…” format in your answer. Iden

tify the independent and dependent variables in this situation.
Observation: Two astronauts push off their spaceship in space. One astronaut is moving away from ship faster than the other one. (Don’t worry, there is a rescue vehicle on the way!)
Question: What is the relationship between force and speed?
(1pts) Hypothesis: If______________, then____________.


(1pt) Independent Variable:

(1pt) Dependent Variable:

30 points for you to answer this question with the RIGHT answer
Chemistry
1 answer:
Anna [14]3 years ago
4 0

Answer:

If one astronaut used more force, then that one would be faster than the other. The independent variable is force. The dependent variable is speed.

Explanation:

Force is what is to be changed. Speed is what is being measured.

IV = Changed/factor DV=Measured/Changes by factor

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One of the hydrates of MnSO4 is manganese(II) sulfate tetrahydrate . A 71.6 gram sample of MnSO4 4 H2O was heated thoroughly in
Dennis_Churaev [7]

Answer:

48.32 g of anhydrous MnSO4.

Explanation:

Equation of dehydration reaction:

MnSO4 •4H2O --> MnSO4 + 4H2O

Molar mass = 55 + 32 + (4*16) + 4((1*2) + 16)

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Mass of MnSO4 • 4H2O = 71.6 g

Number of moles = mass/molar mass

= 71.6/223

= 0.32 mol.

By stoichiometry, since 1 mole of MnSO4 •4H2O is dehydrated to give 1 mole of anhydrous MnSO4

Number of moles of MnSO4 = 0.32 mol.

Molar mass = 55 + 32 + (4*16)

= 151 g/mol.

Mass = 151 * 0.32

= 48.32 g of anhydrous MnSO4.

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