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ruslelena [56]
3 years ago
8

Please help meee 1st question​

Chemistry
1 answer:
spayn [35]3 years ago
5 0
360 seconds?

i’m guessing that is the answer as the question is unreasonable
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15.0 mL of an unknown clear liquid is added to a 50 mL graduated cylinder. The mass of the liquid is determined to be 12.7 grams
sveticcg [70]

Answer:

\boxed {\tt A. \ d=0.85 \ g/mL}

Explanation:

Density is found by dividing the mass by the volume.

d=\frac{m}{v}

The mass of the liquid is 12.7 grams.

We know that 15 mL of this liquid was added to a 50 mL graduated cylinder. Therefore, the volume is 15 mL. The 50 mL is not relevant, it only tells us about the graduated cylinder.

m= 12.7 \ g\\v= 15 \ mL

Substitute the values into the formula.

d=\frac{12.7 \ g}{ 15 mL}

Divide.

d=0.846666667 \ g/mL

Round to the nearest hundredth. The 6 in the tenth place tells us to round the 4 to a 5.

d \approx 0.85 \ g/mL

The density of the liquid is about 0.85 grams per milliliter and choice A is correct.

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3 years ago
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I think is 1 and a half km
7 0
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How many molecules of H2O are equivalent to 98.2 g of H2O
GREYUIT [131]

Answer:

Demo Mole Quantities

58.5g NaCl(mol/58.5g)(6.02 x 1023/mol) = 6.02 x 1023 Na

+

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63.5g Cu( mol/ 63.5g)(6.02 x 1023/mol) = 6.02 x 1023 Cu

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Explanation:

3 0
3 years ago
C.<br> Calculate the number of moles in 62g of CO2
worty [1.4K]

Answer:

32÷5

I'm just tryna get points I'm sorry

goodluck tho❤

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Someone has left a shiny metal bowl outside in the sun. Which may have the potential to damage your eyes: looking at the outside
STatiana [176]

Answer:

Looking at the inside of the bowl

Explanation:

The curvature of the bowl would likely focus the light to a single point or area above it. This higher intensity area would be more dangerous to look at.

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