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kiruha [24]
2 years ago
13

To determine molecular mass

Chemistry
1 answer:
Jet001 [13]2 years ago
5 0
I think the best answer is D
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What is the speed of sound in dry air at 20°C?
Lubov Fominskaja [6]
343 meters per second
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3 years ago
What is the ph of a 0.0055 m ha (weak acid) solution that is 8.2% ionized?
Trava [24]
Answer is: pH value of weak is 3.35.
Chemical reaction (dissociation): HA(aq) → H⁺(aq) + A⁻(aq).
c(HA) = 0.0055 M.
α = 8.2% ÷ 100% = 0.082.
[H⁺] = c(HA) · α.
[H⁺] = 0.0055 M · 0.082.
[H⁺] = 0.000451 M.
pH = -log[H⁺].
pH = -log(0.000451 M).
pH = 3.35.
pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity <span>an aqueous solution.</span>
3 0
3 years ago
What evidence from the experiment shows that conduction occurred? In your answer, be sure to include the materials involved in t
velikii [3]

Answer:

Explanation:

The melting of the chocolate pieces one by one showed that it was caused by heat flowing through the foil bridge. The transfer of heat happened between the foil bridge and the chocolate pieces because they were touching each other.

5 0
3 years ago
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Match the element with number of valence electrons
Alla [95]

Answer:

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Explanation:

6 0
2 years ago
What is the formula for weight ?
Oxana [17]

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W=F=mg or W=mg

Explanation:

6 0
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