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stira [4]
3 years ago
12

What the first questions answer? Anyone know if so plz help a siesta out

Chemistry
1 answer:
Marysya12 [62]3 years ago
8 0

Answer:

hi

Explanation:

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100 ml of a 2.4 m solution is diluted to a final volume of 250 ml what is the new molarity
HACTEHA [7]

Answer:

The new molarity is 0,96 M.

Explanation:

A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).

We use the formula for dilutions:

C1 x V1 = C2 x V2

2,4 M x 100ml = C2 x 250 ml

C2= (2,4 M x 100ml)/250 ml

<em>C2= 0,96 M</em>

8 0
3 years ago
Students are designing an experiment to test the law of conservation of mass using the following materials: 10 g baking soda, 30
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Answer:

1. Students need to measure masses of the items.

2. Put baking soda and vinegar in a plastic bag and close it.

3. Mix the two, allowing for a reaction to occur.

4. Figure the mass of the plastic bag while the two components are inside.

5. The combined mass should be equal to what each weighed on their own.

Explanation:

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18. When a chemical reaction takes place in an open system, matter_____.
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A) can enter from the surroundings, but cannot escape to the surroundings
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What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?
steposvetlana [31]
STP condition mean we have P=1 atm. T=273K. R=ideal gas constant, but make sure you use the one that has the same units of pressure, temperature that you are using. In this case R=0.0821 L*atm K^-1mol^1. You are provided with n=2.1 moles.
V=nRTP
Input your values and solve.
3 0
3 years ago
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