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Galina-37 [17]
3 years ago
7

Question 4 of 10

Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
8 0

Answer:

The answer is 7

Explanation:

Guessed it

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He henry's law constant of oxygen in water at 25 °c is 773 atm mol-1kg h2o. calculate the molality of oxygen in water under a p
motikmotik
Henry law:

P = KC
P = solvent vapour pressure
K = Henry constant 
C = conc of solute

So,   0.2 = 773 C
so, C =  0.2 / 773 =   2.5 x 10^{-4} molal
4 0
3 years ago
Which of the following elements is the largest? :
Troyanec [42]

Answer: oxygen

Explanation: as you go across period on the periodic table, the elements get larger. Their atomic masses also increase meaning it gets heavier and thus larger.

7 0
3 years ago
Read 2 more answers
Water contrasts on freezing ?
Airida [17]

No. When water first begins to cool down, it contracts. However, as it gets colder and eventually freezes, it begins to expand.

You can test this by freezing water in a water bottle: when you take it out of the freezer, the cap might have popped off or cracks may have formed in the sides of the bottle.

Answer: Water expands when frozen, not contracts.

8 0
4 years ago
If MnSO4 → Mno+ SO3 is not a synthesis reaction, then what type of reaction is it?
9966 [12]
<h2>Decomposition</h2>

Explanation:

A synthesis reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product.

Since there is only one reactant and it is broken into smaller components,

it is not a synthesis reaction.

A decomposition reaction is a type of chemical reaction in which one reactant yields two or more products.

Since in our question,there is one reactant and it is broken to yield two products,it is a decomposition reaction.

6 0
3 years ago
Of the substances xe, ch3cl, hf, which has: (a) the smallest dipole–dipole forces? (b) the largest hydrogen bond forces? (c) the
frosja888 [35]
A) <span>he smallest dipole–dipole forces have xenon (Xe), because xenon is a noble gas and have stable electron configuration and do not form dipole.
b) t</span><span>he largest hydrogen bond forces have HF because hydrogen bonds are formed between hydrogen and F, O and N.
</span>c) the largest dispersion forces have CH₃Cl because he has strongest <span>induced temporary dipoles.</span>
6 0
3 years ago
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