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3 years ago

Using the correct number of significant figures 52.733 multiplied by 48.21

Chemistry

1 answer:

Romashka-Z-Leto [24]3 years ago

4 0

Answer:

2542

Rule for multiplying Significant Figures:

The product is limited to the number of sig figs equal to the least number of sig figs in the problem

Explanation:

52.733 has 5 significant figures and 48.21 has 4 significant figures. Therefore, the answer given must have 4 significant figures.

52.733(48.21) = 2542.25793

This answer round to have 4 significant figures is 2542.

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45. most abundant metal in the earth's crust<br> 46. first discovered in light coming from the sun

Yanka [14]

Answer:

45. Aluminum

46. helium

Explanation:

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3 years ago

The graph below shows how solubility changes with temperature.

Otrada [13]

The two solutions that have similar solubilities at 40°C will be Na₂HAsO₄ and Na₂SO₄.

<h3>What is solubity ?</h3>

It is the ability of a solute to be dissolved, especially in water.

As the temperature increases the solubility of the gas generally decreases"

According to given information and graph attached as reference ;

Solubility of NaCl (sodium chloride) at 40°C is 36.3 grams.
Solubility of Na₂SO₄ (sodium sulfate) at 40°C is 48.8 grams.
Solubility of Na₂HAsO₄ (sodium arsenate dibasic) at 40°C is 48.9
grams.
Solubility of Ba(NO₃)₂ (barium nitrate) at 40°C is 14.1 grams.
Solubility of Ce₂(SO₄)₃·9H₂O (ceasium sulfate nonahydrate) at 40°C is 6.2 grams.

Lear more about solubility here ;

brainly.com/question/19221092

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2 years ago

Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette sm

vladimir2022 [97]

Answer:

pH = 9.29

Explanation:

C5H5N + H2O ↔ C5H5NH+ + OH-

∴ pKb = 8.75 = - Log Kb

⇒ Kb = 1.7783 E-9 = [OH-][C5H5NH+]/[C5H5N]

mass balance:

⇒ <em>C</em> C5H5N = 0.215 M = [ C5H5N ] + [C5H5NH+]

charge balance:

⇒ [OH-] = [C5H5NH+]

⇒ Kb = 1.7783 E-9 = [OH-]² / ( 0.215 - [OH-] )

⇒ [ OH-]² + 1.7783 E-9[OH-] - 3.8233 E-10 = 0

⇒ [OH-] = 1.9552 E-5 M

⇒ pOH = 4.708

∴ 14 = pH + pOH

⇒ pH = 9.29

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3 years ago

Colin decided to investigate soil erosion by water. He measured rates of erosion on

anygoal [31]

Answer:

i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...

the steepness of the models hillside

the rate of erosion on the hills

so the answer is either...

the amount of water sprayed on the hills

the type of material used to construct the model hills

but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)

Explanation:

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3 years ago

Calculate the molar mass lead(ll) nitrate,Pb(NO3)2

SVETLANKA909090 [29]

Refer periodic table
Pb= 207.2
N=14
O= 16
$207.2 \: + (14 \times 2) + (16 \times 6)$
=331.2gmol

6 0

4 years ago