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wolverine [178]
3 years ago
13

PLZ ANSWER IN THE NEXT 24 HOURS MANY POINTS!!!!!!!!

Chemistry
2 answers:
kupik [55]3 years ago
8 0

Answer B

Explanation:

hereI wpould put it on t

Katen [24]3 years ago
3 0

Answer:

Ununennium.

Explanation:

Ununennium, also known as <em>eka-francium</em> or <em>element 119</em>, is the hypothetical chemical element with symbol <em>Uue</em> <em>and atomic number 119. </em> It's Mass number is [315] (predicted), as we as it is existing on the periodic table hence its symbol: <em>Uue</em>

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What mass of calcium chloride is needed to prepare 2.657 L of a 1.56 M solution?
inna [77]

Answer:

459.126 grams of calcium chloride is needed to prepare 2.657 L of a 1.56 M solution

Explanation:

Molarity is a measure of the concentration of a solute in a solution that indicates the amount of moles of solute that appear dissolved in one liter of the mixture. In other words, molarity is the number of moles of solute that are dissolved in a given volume.

The Molarity of a solution is determined by the following expression:

Molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units \frac{moles}{liter}

In this case:

  • Molarity: 1.56 M= 1.56 \frac{moles}{liter}
  • Number of moles of calcium chlorine= ?
  • Volume= 2.657 liters

Replacing:

1.56 M=\frac{Number of moles of calcium chlorine}{2.657 liters}

Solving:

Number of moles of calcium chlorine= 1.56 M* 2.657 liters

Number of moles of calcium chlorine= 4.14 moles

In other side, you know:

  • Ca: 40 g/mole
  • Cl: 35.45 g/mole

Then the molar mass of the calcium chloride CaCl₂ is:

CaCl₂= 40 g/mole + 2* 35.45 g/mole= 110.9 g/mole

Now it is possible to apply the following rule of three: if in 1 mole there is 110.9 g of CaCl₂, in 4.14 moles of the compound how much mass is there?

mass=\frac{4.14 moles*110.9g}{1 mole}

mass= 459.126 g

<u><em>459.126 grams of calcium chloride is needed to prepare 2.657 L of a 1.56 M solution</em></u>

3 0
3 years ago
The diagram below shows three types of earthquake waves, labeled A, B, and C at different time intervals.
77julia77 [94]
The diagram below shows three types of earthquake waves, labeled A, B, and C at different time intervals. The statement that is correct about the three waves is <span>Wave A and Wave B are absorbed by liquid medium. The answer is letter B.</span>
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3 years ago
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The greatest problem facing the use of nuclear power plants is _____.
FinnZ [79.3K]

Answer:

disposal of radioactive waste

Explanation:

if too much is released, it can wipe out large parts of the country

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3 years ago
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ILL GIVE U 100 POINTS!!!!
Alexxx [7]

✿<em>I'll </em><em>take</em><em> </em><em>that</em><em> </em><em>5</em><em>0</em><em> </em><em>pts</em><em> </em>✿

<em>✨</em><em>Refer</em><em> </em><em>these</em><em> </em><em>attachments</em><em>,</em><em> </em><em>for</em><em> </em><em>your</em><em> </em><em>answer</em><em> </em><em>✨</em>

<em>hope it helps</em> ❤~

✨luv, Snowflake✨

6 0
2 years ago
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50 points!! Brainliest if correct!!
Luda [366]

The answer is C. The answer is C because if u increase the surface area, the more reactants u will get. and if u get more The reactants will move faster. Hoped that Helped!:-)

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