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natta225 [31]
4 years ago
14

Pre-lab questions 1. a concentration gradient affects the direction that solutes diffuse. describe how molecules move with respe

ct to the concentration.
Chemistry
1 answer:
VLD [36.1K]4 years ago
7 0

Just like how heat moves from a region of higher temperature to a region of lower temperature, molecules also tend to move from a region of higher concentration to a region of lower concentration. This is called natural diffusion and is naturally happening to reach stability.

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A g[dsoflghdfkjlghskdjfhgkjhsdfgsjkhgkjfhsgkjgsdkfjhgsdjfhgsdfhgsdfjhgsdf
Setler79 [48]

Answer:

same

Explanation:

7 0
3 years ago
Suppose 650.mmol of electrons must be transported from one side of an electrochemical cell to another in 10.0 minutes. Calculate
Alina [70]

Answer:

The size of electric current must 104.5 Ampere.

Explanation:

Moles of electrons = 650 mmol = 650\times 0.001 mol

mmol = 0.001 mol

1 mol =N_A=6.022\times 10^{23} atoms/ions

Number of electrons = N

N = 650\times 0.001\times 6.022\times 10^{23}=3.9143\times 10^{23}

Charge on an electron = 1.602\times 10^{-19} C

Total charge on N electrons = Q

Q=3.9143\times 10^{23}\times 1.602\times 10^{-19} C=62,707.086 C

Duration of time = T = 10 min = 10 × 60 s

1 minute = 60 seconds

Current(I)=\frac{Charge(Q)}{Time(T)}

I=\frac{62,707.086 C}{10\times 60 s}=104.5 A

The size of electric current must 104.5 Ampere.

8 0
3 years ago
What is the [oh−] of a solution with ph 5.75
Gekata [30.6K]
[ H₃O⁺] = 10 ^- pH

[ H₃O⁺] = 10 ^ (- 5.75 )

[H₃O⁺] = 1.778x10⁻⁶ M

Kw = [ H₃O⁺] x [ OH⁻]

1x10⁻¹⁴ = 1.778x10⁻⁶ x [OH⁻]

[OH⁻] = 1x10⁻¹⁴ / 1.778x10⁻⁶

[OH⁻] = 5.62x10⁻⁹ M

hope this helps!
5 0
3 years ago
Read 2 more answers
True or false. The center of gravity and center of mass of an object need to be in the same spot?
stellarik [79]

Answer:

True................

4 0
3 years ago
Read 2 more answers
What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?
ad-work [718]
The breakdown of mass percentage of the elements is determined by dividing molar masses to the total molar mass of the compound (246.37 g/mol). There are four elements: for Mg: 9.87%, S:13.01%, H:5.69%, 71.44%. 
5 0
3 years ago
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