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Firlakuza [10]
3 years ago
12

Please help! will mark brainliest

Chemistry
1 answer:
Step2247 [10]3 years ago
3 0

Answer:

add me!!!

Explanation:

my insta is: becomewhatyouwant2inlife

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How many grams of water in 8.22 grams of cuso4*5h2o?
S_A_V [24]
Molar mass of CuSO4 * 5 H2O 
= 63.546 + 32 + 16*4 + 5*18 
= 249.546 g/mol
 Mass of water in that formula: 5 * 18 = 90 g/mol
Percent by mass of water = 90 / 249.546 = 36%
<span>So, 36% of your 8.22 g is water. 0.36 * 8.22= 2.95 g of water
</span>
8 0
3 years ago
34. 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases
Digiron [165]

Answer:

ΔH = 2.68kJ/mol

Explanation:

The ΔH of dissolution of a reaction is defined as the heat produced per mole of reaction. We have 3.15 moles of the solid, to find the heat produced we need to use the equation:

q = m*S*ΔT

<em>Where q is heat of reaction in J,</em>

<em>m is the mass of the solution in g,</em>

<em>S is specific heat of the solution = 4.184J/g°C</em>

<em>ΔT is change in temperature = 11.21°C</em>

The mass of the solution is obtained from the volume and the density as follows:

150.0mL * (1.20g/mL) = 180.0g

Replacing:

q = 180.0g*4.184J/g°C*11.21°C

q = 8442J

q = 8.44kJ when 3.15 moles of the solid react.

The ΔH of the reaction is:

8.44kJ/3.15 mol

= 2.68kJ/mol

5 0
3 years ago
To calculate the density of a sample of matter,you must divide it_____ by its______.
Ymorist [56]
I think it is voulume and total mass
8 0
3 years ago
The conductance of the electric current through the electrolytic solution increases with
katrin2010 [14]

The conductance of the electric current through the electrolytic solution increases with increase in concentration.

<h3>What is electrolysis?</h3>

The term electrolysis has to do with a situation in which liquids conduct electricity by the movement of ions.

The conductivity of the solution depends on the ions present in the solution. Thus, the conductance of the electric current through the electrolytic solution increases with increase in concentration.

Learn more about electrolysis:brainly.com/question/12054569

#SPJ1

3 0
2 years ago
Which of the following methods correctly describes the preparation of 1.00 L of an aqueous solution of 0.500 M NaOH?
djyliett [7]

Answer:

Place 20.0 g NaOH(s) in a flask and dilute to 1.00 L with water.

Explanation:

7 0
2 years ago
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