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ELEN [110]
3 years ago
15

Is sodium hydroxide dissolving in water a physical change?

Chemistry
1 answer:
kipiarov [429]3 years ago
5 0
No it is a chemical change.
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11111nata11111 [884]
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3 years ago
What is the mass of 1.71 ✕ 1023 molecules of h2so4?
Anuta_ua [19.1K]
The equation for calculating a mass is as follows:

m=n×M

Molar mass (M) we can determine from Ar that can read in a periodical table, and a number of moles we can calculate from the available date for N:

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n(H2SO4)= 1.7×10²³ / 6 × 10²³

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m(H2SO4) = n×M = 0.3 × 98 = 27.8 g



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7 0
4 years ago
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During inhalation, View Available Hint(s) During inhalation, oxygen molecules move into the lungs, and carbon dioxide molecules
bekas [8.4K]

Answer:

the diaphragm and rib muscles contract

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5 0
4 years ago
PLEASE ANSWER IF YOU KNOW
Lerok [7]

Answer:

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