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zloy xaker [14]
3 years ago
7

*WILL GIVE BRAINLIEST IF SOMEONE ANSWERS THIS CORRECTLY ASAP!!!!*

Chemistry
2 answers:
natima [27]3 years ago
6 0

Answer:

Best answer choice is "<u>Mass of the graduated cylinder with the liquid in </u><u>it</u> "

Explanation:

if they want to determine density of liquid they'll use D= m/v

  • they already have the volume (v)
  • now they just need the mass (m) of the liquid (BUT NOT OF THE CYLINDER) You'll want the LIQUID'S mass (m) ONLY
  • So <em>"</em><em>Mass of the graduated cylinder with the liquid in it</em><em>"</em> = Liquid's mass WITH the cylinder's mass ALSO, let's get rid of the cylinder's mass
  • now you get the liquid's mass by itself
  1. mass of graduated cylinder with liquid in it subtracted by the <em>Mass</em><em> </em><em>of</em><em> </em><em>empty</em><em> </em><em>graduated</em><em> </em><em>cylinder</em><em> </em><em>=</em><em> </em><em>(</em><em>m</em><em>)</em><em> </em>mass of liquid
  2. (m) mass of liquid ÷ (v) volume of liquid in the graduated cylinder = (D) Density
  3. So your answer will be "Mass of the graduated cylinder with the liquid in it"
My name is Ann [436]3 years ago
6 0

Answer:

the answer is C

Explanation:

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Express the following in standard exponential format <br> 3,186
Colt1911 [192]

3.19 x 10³

Explanation:

The exponential format of the a figure is used to simplify the expression of big numbers to make them easier to work with.

The number is simply raised to the power of tens.

    3,186

This is number three thousand one hundred and eighty six

The highest number here is a thousand

A thousand is 10³

  So we simply take the rest of the values and express it this way;

             3.186 x 10³ or 3.19 x 10³ on rounding up

learn more:

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3 years ago
Which equation represents a spontaneous transmutation
Ilya [14]
 The correct answer is:
<span>37/20Ca --> 37/19K + 0/+1e

Explanation:

</span>Transmutation, conversion of 1 element<span> into another. A transmutation entails an </span>amendment within the<span> structure of atomic nuclei and </span>thus is also <span>induced </span><span>by an </span>action<span> (q.v.), </span>like nucleon<span> capture, or occur </span>ad libitum<span> by </span>decay<span>, </span>like disintegration<span> and </span>disintegration<span>(qq.v.)</span>
8 0
3 years ago
What generates ocean tides on Earth?
Alla [95]

alignment of the Earth with the Moon and Sun

This is the answer.

<em>Tides </em><em>are </em><em>formed </em><em>by </em><em>gravitational</em><em> force</em><em> of</em><em> </em><em>Sun </em><em>and </em><em>Moon.</em><em> </em>

3 0
3 years ago
Read 2 more answers
If 16.9 kg of Al2O3(s), 57.4 kg of NaOH(l), and 57.4 kg of HF(g) react completely, how many kilograms of cryolite will be produc
hodyreva [135]

Answer: 69.72 kg of cryolite will be produced.

Explanation:

The balanced chemical equation is:

Al_2O_3(s)+6NaOH(l)+12HF(g)\rightarrow 2Na_3AlF_6+9H_2O

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of Al_2O_3 = \frac{16.9\times 1000g}{102g/mol}=165.7moles

moles of NaOH = \frac{57.4\times 1000g}{40g/mol}=1435moles

moles of HF = \frac{57.4\times 1000g}{20g/mol}=2870moles

As 1 mole of Al_2O_3 reacts with 6 moles of NaOH

166 moles of  Al_2O_3 reacts with = \frac{6}{1}\times 166=996 moles of NaOH

As 1 mole of Al_2O_3 reacts with 12 moles of HF

166 moles of  Al_2O_3 reacts with = \frac{12}{1}\times 166=1992 moles of HF

Thus Al_2O_3 is the limiting reagent.

As 1 mole of Al_2O_3 produces = 2 moles of cryolite

166 moles of  Al_2O_3 reacts with = \frac{2}{1}\times 166=332 moles of cryolite

Mass of cryolite (Na_3AlF_6) = moles\times {\text {molar mass}}=332mol\times 210g/mol=69720g=69.72kg

Thus 69.72 kg of cryolite will be produced.

8 0
3 years ago
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