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3 years ago

Explain why heat is often used in a laboratory experiment. a. To warm up the laboratory, b. To speed up a reaction

Chemistry

1 answer:

uysha [10]3 years ago

3 0

Answer:

To speed up a reaction

Explanation:

Heat, as well as catalysts, increase the reaction rate of some chemical reactions since they cause the enzymes or reagents in charge of carrying out the transformation to products to act faster and increase their kinetic energy of reaction.

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A 2 mole sample of F2(g) reacts with excess NaOH(aq) according to the equation above. If the reaction is repeated with excess Na

77julia77 [94]

Answer:

The amount of NaF produced is doubled.

(d) is correct option.

Explanation:

Given that,

A 2 mole sample of F₂ reacts with excess NaOH according to the equation.

The balance equation is

$2F_{2}+2NaOH\Rightarrow 2NaF +H_{2}O+OF_{2}$

If the reaction is repeated with excess NaOH but with 1 mole of F₂

The balance equation is

$F_{2}+2NaOH\Rightarrow 2NaF +2OH$

Hence, The amount of NaF produced is doubled.

(d) is correct option.

6 0

3 years ago

Which contains more molecules: a mole of hydrogen or a mole of chlorine

Maurinko [17]

b is answer good luck.

3 0

3 years ago

Read 2 more answers

How many moles are in 6.777 x 1023 atoms of CO2. Watch your significant figures. Question 2 options: 1 atoms CO2 1.125 moles CO2

Archy [21]

Answer:

1.13moles

Explanation:

Given parameters:

Number of atoms = 6.777 x 10²³ atoms

Unknown:

Number of moles = ?

Solution:

A mole of a substance contains the avogadro's number of particles

6.02 x 10²³ particles = 1 mole

6.777 x 10²³ atoms will contain $\frac{ 6.777 x 10^{23} }{6.02 x 10^{23} }$ = 1.13moles

6 0

3 years ago

Eriq, a chemist, is running tests with four unknown elements. He has found that they all bond the same way, so he knows that the

Reil [10]

Answer:

in group 17

Explanation:

just took the quiz

4 0

3 years ago

Read 2 more answers

Analysis of a compound of sulfur, oxygen and fluorine showed that it is 31.42% S and 31.35% O, with F accounting for the remaind

Leya [2.2K]

Answer:

The molecular formula is SO2F2

Explanation:

Step 1: Data given

Suppose the mass of compound = 100 grams

The compound contains:

31.42 % S = 31.42 grams S

31.35 % O = 31.35 grams O

100 - 31.42 - 31.35 = 37.23 F

Molar mass of S = 32.065 g/mol

Molar mass F = 19.00 g/mol

Molar mass O = 16.00 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles S = 31.42 grams / 32.065 g/mol

Moles S = 0.9799 moles

Moles 0 = 31.35 grams / 16.00 g/mol

Moles 0 = 1.959 moles

Moles F = 37.23 grams / 19.00 g/mol

Moles F = 1.959 moles

Step 3: Calculate mol ratio

We divide by the smallest amount of moles

S: 0.9799 / 0.9799 = 1

F: 1.959/ 0.9799 = 2

O : 1.959 / 0.9799 = 2

The empirical formula is SO2F2

This formula has a molecular mass of 102.06 g/mol

This means the empirical formula is also the molecular formula : SO2F2

3 0

3 years ago