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ziro4ka [17]
3 years ago
10

Select all actions below that you must take to ensure laboratory safety during the experiment. Check all that apply

Chemistry
1 answer:
Lapatulllka [165]3 years ago
8 0

Answer:

using test tube tongs to handle the hot test tubes

checking the beaker for chips prior to heating on the hot plate

turning off the hot plate after use

Explanation:

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100 ml is drawn from 0.1 M solution of KCl and added to 900 ml of water. What is the
grandymaker [24]

Answer:

The new concentration will be 0.01 M.

Explanation:

To determine the new concentration we use the following formula.

concentration (1) × volume (1) = concentration (2) × volume (2)

concentration (1) = 0.1 M

volume (1) = 100 mL

concentration (2) = unknown

volume (2) = 100 mL + 900 mL = 1000 mL

concentration (2) = [concentration (1) × volume (1)] / volume (2)

concentration (2) = (0.1 × 100) / 1000 = 0.01 M

3 0
3 years ago
If you had 1.50 g of ZnSO4.7H20, zinc sulfate septahydrate, how many grams of water will there be?
MariettaO [177]

Answer:

There will be 1.50 gram of water

5 0
3 years ago
What is the density of a cube of water measuring 2cmX4cmX1cm, with a mass of<br> 8g?
Vinil7 [7]

The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

7 0
2 years ago
How many grams of potassium nitrate (KNO3) are required to prepare 0.250L of a 0.700 M
CaHeK987 [17]

Answer:

17.78g

Explanation:

m/M = C×V

m/101.102= 0.7× 0.25

m= 101.102×0.7×0.25= 17.78g

6 0
3 years ago
What is the mass in grams of 17.46 mL m L of acetone?
Crazy boy [7]

Answer:

17,46gram

Explanation:

because 1l is egal to kg

4 0
3 years ago
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