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3 years ago

5

Why does halite cause ice water to get colder?

1 answer:

tatyana61 [14]3 years ago

6 0

Because the salt<span> lowers the temp of the water thereby making the water </span>colder<span>so the </span>ice<span> takes longer to melt</span>

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a metal forms two oxides. The higher oxide contains 80% metal. 0.72g of the lower oxide gave 0.8g of the higher oxide when oxidi

zzz [600]

Answer:

0.72 g of the lower oxide gave 0.8 g of higher oxide when oxidised. ... Thus, 90g of lower oxide contains as much metal as 100g of higher oxide, i.e., 80g (given). Hence, 80g of metal combines with 10g of oxygen in the lower oxide and 20g of oxygen in the higher oxide.

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2 years ago

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Can anyone draw a diagram of a liebigs condenser

MrMuchimi

I googled it, here it is lol

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2 years ago

What is the formula for weight ?

Oxana [17]

Answer:

W=F=mg or W=mg

Explanation:

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3 years ago

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1. A sample of polystyrene is found to have a number-average molar mass of 89,440 g mol−1 . Neglecting contributions from end gr

Snowcat [4.5K]

Answer:

The weight-average molar mass of polystyrene is 134,160 g/mol.

Explanation:

Molar mass of the monomer styrene , $C_8H_8$ , M=104 g/mol

Given , number average molar mass of the polymer , M'= 89,440 g/mol

Degree of polymerization = n

$n=\frac{M'}{M}=\frac{89,440 g/mol}{104 g/mol}=860$

The weight-average molar mass = $M_{avg}=?$

Molar mass dispersity is ratio of weight-average molar mass to the number average molar mass of the polymer.

$\text{Molar mass dispersity}=\frac{M_{avg}}{M'}$

$1.5=\frac{M_{avg}}{89,440 g/mol}$

$M_{avg}=89,440 g/mol\times 1.5 = 134,160 g/mol$

The weight-average molar mass of polystyrene is 134,160 g/mol.

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2 years ago

How many primary,secondary and Tertiary carbons are in the compound. 2,3-dimethyl pentane. And

r-ruslan [8.4K]

Answer:

5 primary carbon atoms

3 secondary carbon atoms

4 tertiary carbon atoms

6 hydrogen atoms

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3 years ago