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1 year ago

John is carefully pouring a chemical into a beaker when the beaker slips and breaks

1 answer:

5 0

Following laboratory safety protocols such as wearing personal protective equipment will protect John when the accident occurred.

<h3>What are laboratory safety protocols?</h3>

Laboratory safety protocols are the protocols put in place to ensure safety in the laboratory.

Laboratory safety protocols include the following:

always wear personal protective equipment in the laboratory
do not play in the laboratory
do not eat in the laboratory

Following laboratory safety protocols will help protect us from accidents which occur in the laboratory.

What happened when john was carefully pouring a chemical into a beaker when the beaker slips and breaks is an example of laboratory accident.

Wearing personal protective equipment will protect John.

In conclusion, following laboratory safety protocols will protect us when accidents occur in the laboratory.

Learn more about laboratory safety protocols at: brainly.com/question/17994387

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Note that the complete question is given as follows:

John is carefully pouring a chemical into a beaker when the beaker slips and breaks. How would laboratory safety protocols help John?

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Two ice skaters push off against one another starting from a stationary position. The 45.0-kg skater acquires a speed of 0.375 m

zalisa [80]

Answer:

The speed of the 60.0 kg skater should be 0.281 m/s

Explanation:

<u>Step 1: </u>Data given

Mass of skater 1 = 45.0 kg

speed of skater 1 = 0.375 m/s

Mass of skater 2 = 60.0 kg

<u>Step 2:</u> Calculate the speed of skater 2

To solve this problem, we will use 'Conservation of momenton'. This means the momentum before the push equals the momentum after.

momentum p = m*v

Momentum p(before) = momentum p(after)

m1*v1 = m2 * v2

⇒ with m1 = mass of skater 1 = 45.0 kg

⇒ with v1 = the velocity of skater 1 = 0.375 m/s

⇒ with m2 = the mass of skater 2 = 60.0 kg

⇒ with v2 = the velocity of skater 2 = TO BE DETERMINED

45.0 * 0.375 = 60.0 * v2

v2 = (45.0*0.375)/60

v2 = 0.281 m/s

The speed of the 60.0 kg skater should be 0.281 m/s

6 0

3 years ago

Which quantity of heat is equal to 200. joules?<br> (1) 20.0 kJ (3) 0.200 kJ

AveGali [126]

The answer is (3) 0.200 kJ
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4 0

3 years ago

A sulfuric acid solution containing 571.6 g of H2SO4 per liter of aqueous solution has a density of 1.329 g/cm^3.Calculate:a. Ma

12345 [234]

Given :

Mass of $H_2SO_4$ is 571.6 g per liter .

Density of solution , $\rho=1.329\ g/cm^3$ .

To Find :

a. Mass percentage

b. Mole fraction

c. Molality

d. molarity of H2SO4 in this solution.

Solution :

Molar mass of $H_2SO_4$ , m = 1329 g/mol .

a ) Mass of $H_2SO_4$ contain in 1 liter is 1329 g .

$mass \ \%=\dfrac{571.6}{1329}\times 100=43.01 \%$

b ) Moles of $H_2SO_4$ = $\dfrac{571.6\ g}{98\g/mol}=5.83\ mol$ .

Moles of $H_2O$ = $\dfrac{1329-571.6\ g}{18\ g/mol}=42.08\ mol$ .

Mole fraction $=\dfrac{5.83}{5.83+42.08}=0.12$ .

c ) Molarity of $H_2SO_4$ $=\dfrac{5.83\ mol}{1 \ L}=5.83\ M$ .

Hence , this is the required solution .

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3 years ago

The difference in the direction is caused by the ______________.Please help!

dem82 [27]

What don’t understand question

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3 years ago

The liquid is being heated.

spayn [35]

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3 years ago