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3 years ago

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Question:

1 answer:

anzhelika [568]3 years ago

7 0

Answer:

A. Chemical

B. physical

Explanation:

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a sample of the hydrate of sodium carbonate has a mass of 8.85 g. it loses 1.28 g when heated. find the molar ratio of this comp

xenn [34]

Answer:

Molar ratio of the compound is 1:1 and the type of hydrate is Mono hydrate.

Explanation:

From the given,

Mass of sodium carbonate $Na_{2}CO_{3}.XH_{2}O$ = 8.85 g

Loss mass $H_{2}O$ = 1.28 g

Actual weight of sodium carbonate = 8.85 g - 1.28 g = 7.57 g

$7.57 g Na_{2}CO_{3} \times \frac{1mol}{106 g} =\frac{0.0714}{0.0714}=1$

$1.28g H_{2}O \times \frac{1mol}{18 g} =\frac{0.0711}{0.0714}=1$

Therefore, the compound has only one water molecule.

Molecular formula of the compound is $Na_{2}CO_{3}.H_{2}O$ an name of the compound is <u>sodium carbonate mono hydrate.</u>

Hence, the type of the compound is Mono hydrate.

8 0

3 years ago

Perform the following conversions:

jek_recluse [69]

Answer :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=\frac{5}{9}\times (^oF-32)$

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=^oC+273$

(a) $1.06^oF$

$^oC=\frac{5}{9}\times (^oF-32)$

$^oC=\frac{5}{9}\times (1.06^oF-32)$

$^oC=-17.188$

The temperature in degree Celsius is, $-17.188^oC$

$K=^oC+273$

$K=-17.188+273$

$K=255.812$

The temperature in Kelvin is, 255.812 K

(b) $3410^oC$

$^oC=\frac{5}{9}\times (^oF-32)$

$3410^oC=\frac{5}{9}\times (^oF-32)$

$^oF=6106$

The temperature in degree Fahrenheit is, $6106^oF$

$K=^oC+273$

$K=3410+273$

$K=3683$

The temperature in Kelvin is, 3683 K

(c) $6.1\times 10^3K$

$K=^oC+273$

$6.1\times 10^3K=^oC+273$

$^oC=5827$

The temperature in degree Celsius is, $5827^oC$

$^oC=\frac{5}{9}\times (^oF-32)$

$5827^oC=\frac{5}{9}\times (^oF-32)$

$^oF=10456.6$

The temperature in degree Fahrenheit is, $10456.6^oF$

8 0

3 years ago

cestrela7 [59]

D hope it helps you I'm stuck on science

3 0

3 years ago

Which does your digestive system use to break down food molecules? Bases or Acids

Harman [31]

Answer:

acid

Explanation:

4 0

3 years ago

Reese put gravel, sand, and clay in a bottle. She added some water, shook the bottle, and left it for an hour. What did she see

quester [9]

<span>Gravel settled at the bottom and clay settled at the top.</span>

3 0

3 years ago

Read 2 more answers