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nikdorinn [45]
3 years ago
12

Which of the following is the best explanation for why it is important to follow lab safety guidelines?

Chemistry
1 answer:
I am Lyosha [343]3 years ago
8 0

Answer:

Following laboratory safety guidelines minimizes the chance of lab accidents.

Explanation:

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Vitamin K is involved in normal blood clotting. When 0.802 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point
xenn [34]

Answer:

Molar mass of vitamin K = 450.56\frac{g}{mol}[/tex]

Explanation:

The freezing point of camphor = 178.4 ⁰C

the Kf of camphor =  37.7°C/m

where : m = molality

the relation between freezing point depression and molality is

Depression in freezing point = Kf X molality

Where

Kf = cryoscopic constant of camphor

molality = moles of solute dissolved per kg of solvent.

putting values

2.69°C = 37.7°C/m X molality

molality = 0.0714 mol /kg

molality=\frac{molesofvitaminK}{massofcamphor(kg)}=\frac{moles}{0.025}

moles of vitamin K = 0.0714X0.025 = 0.00178 mol

we know that moles are related to mass and molar mass of a substance as:

moles=\frac{mass}{molarmass}

For vitamin K the mass is given = 0.802 grams

therefore molar mass = \frac{mass}{moles}=\frac{0.802}{0.00178}=450.56\frac{g}{mol}

7 0
3 years ago
An electrolytic cell Group of answer choices consumes electrical current to drive a nonspontaneous chemical reaction. produces e
Rzqust [24]

Answer:

produces electrical current from electricity. produces electrical current from a nonspontaneous chemical reaction.

Explanation:

An electrolytic cell converts electrical energy into chemical energy. Here, the redox reaction is spontaneous and is responsible for the production of electrical energy. The reaction at the anode is oxidation and that at the cathode is reduction. Here, the anode is positive and the cathode is the negative electrode.

3 0
4 years ago
Look at the chemical equation shown below. A, B, X, and Y represent different elements or polyatomic ions.
VLD [36.1K]

Answer:

The answer to your question is an acid base reaction

Explanation:

A single replacement reaction  is a reaction in which one metal replaces the cation of a compound. The reaction of this problem is not of this type because here the reactants are compounds no single elements.

A decomposition reaction  is a reaction in which one compound decomposes into two or more products. This is not the answer to this question because in this reaction there are two reactants not only one.

A synthesis reaction  is a reaction in which two reactants form only one product. The reaction of this problem is not of this type because there are two products not only one.

An acid-base reaction is a kind of double replacement reaction. In some acid-base reactions, there is an interchange of cations and anions like is shown in this reaction.

8 0
3 years ago
Complete the following equations
hoa [83]
The answer is NaCl

-Hope this helps
5 0
3 years ago
Bruh Im 4th on the leaderboard How is this possible
forsale [732]

Answer:

I guess you just answered a lot of questions

Explanation:

Thanks for the points btw :)

4 0
3 years ago
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