3 years ago

Hey I'm a newbie any help please with this

Chemistry

1 answer:

solniwko [45]3 years ago

4 0

6 A
7 A
8 B
9 B
10 A
11 C

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Can someone please help me

Vanyuwa [196]

Answer:

1.7

Explanation:

Density = M/V

When you divide 4.52 by 2.6, you get 1.738461538, which can be simplified to 1.7.

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2 years ago

What is the correct way to write .00095 in scientific notation

EastWind [94]

9.5 x 10^-4 is the answerZ

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Why does a solid have a definite shape and volume?

erica [24]

Answer:

Explanation:

The particles are bound to each other and they vibrate at an almost undetectable rate.

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2 years ago

A sodium hydroxide solution is made by mixing 8.70 g NaOH with 100 g of water. The resulting solution has a density of 1.087 g/m

Ahat [919]

Answer:

Mass fraction = 0.08004

Mole fraction = 0.0377

Explanation:

Given, Mass of NaOH = 8.70 g

Mass of solution = 8.70 + 100 g = 108.70 g

$Mass\ fraction\ of\ NaOH=\frac {8.70}{108.70}$ = 0.08004

Molar mass of NaOH = 39.997 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{8.70\ g}{39.997\ g/mol}$

$Moles\ of\ NaOH= 0.2175\ mol$

Given, Mass of water = 100 g

Molar mass of water = 18.0153 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{100\ g}{18.0153\ g/mol}$

$Moles\ of\ water= 5.5508\ mol$

So, according to definition of mole fraction:

$Mole\ fraction\ of\ NaOH=\frac {n_{NaOH}}{n_{NaOH}+n_{water}}$

$Mole\ fraction\ of\ NaOH=\frac {0.2175}{0.2175+5.5508}=0.0377$

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2 years ago

How many molecules are in 100 g of C6H1206?

rjkz [21]

Answer: 100 grams of glucose represents 0.55 moles .

Explanation:

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3 years ago