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HACTEHA [7]
3 years ago
11

Scientific experiments must be able to be repeated by multiple scientists to verify the results that are obtained. Which of the

following is an example of a scientific question that could be used to create an easily reproducible experiment?
Chemistry
1 answer:
solmaris [256]3 years ago
5 0
Hi,

You didn't mention what "the following" were - please add additional information so the problem can be solved.


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If you dissolve 3.5 moles of cacl2 in solution how many moles of ca2+ ions and cl- ions will there be in the solution
Wittaler [7]
Balanced chemical reaction (dissociation) : CaCl₂(aq)  → Ca²⁺(aq) + 2Cl⁻(aq).
n(CaCl₂) = 3,5 mol.
From chemical reaction: n(CaCl₂) : n(Ca²⁺) = 1 : 1.
n(Ca²⁺) = 3,5 mol.
From chemical reaction: n(CaCl₂) : n(Cl⁻) = 1 : 2.
n(Cl⁻) = 2 · 3,5 mol.
n(Cl⁻) =  7 mol.
Calcium chloride is salt that completely dissociate in water on calcium cations and chlorine anions.
8 0
3 years ago
Which substance is a mixture<br><br> Table salt<br> Gasoline<br> Aluminum<br> Carbon Dioxide
NNADVOKAT [17]

Answer:

carbon dioxide

Explanation:

its 2 or more things

8 0
3 years ago
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A Pitot-static probe is used to measure the speed of an aircraft flying at 3000 m. If the differential pressure reading is 3100
inessss [21]

Answer:

82.59 m/s or 297.324 km/h

Explanation:

From the question,

Applying

V = √[2(P'/ρ)].................. Equation 1 ( From

Where V = Speed of the aircraft, Differential Pressure of the air craft, ρ = Density of air at an altitude of 3000 m.

Given: P' = 3100 N/m², ρ = 0.909 kg/m³

Substitute into equation 1

V = √[2(3100/0.909)]

V = √(2×3410.34)

V = √(6820.68)

V = 82.59 m/s

V = 297.324 km/h

Hence the speed of the aircraft is  82.59 m/s or 297.324 km/h

3 0
3 years ago
Identify the type of energy involved in each step:
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Radiant energy or electrical energy
6 0
3 years ago
Compare the diameter of the moon to the diameter of the Earth
hichkok12 [17]

Answer:

Ok Hold up. I will answer after I think of question

Explanation:

6 0
3 years ago
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