1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
musickatia [10]
3 years ago
8

In preparing your soap, you dissolved 12.5 g of sodium hydroxide in 32.0 mL of de-ionized water. Your product was a solid cake o

f soap. What happened to the water you added when preparing your soap during the course of the experiment?
Chemistry
1 answer:
Aleksandr [31]3 years ago
4 0

Explanation:

The generated Na+ and OH-ions are immediately surrounded by molecules of water (typically 6, each). There is the development of the exothermic hydration sphere for each ion. It seems as though there is negative overall energy of dissolving solid NaOH.

Now, since this dissolution is exothermic the temperature of the mixture rises.

You might be interested in
En que epoca aprendieron a trabaja el cobre y otros metales?
g100num [7]
Maybe if you put it in english i’ll answer.. nahh jp i’m fluent
6 0
2 years ago
Match the theory to the statement that best describes it. 1. big bang it's like an inflating and deflating balloon that never st
otez555 [7]
1. big bang-the most accepted theory on the origin of the universe <span>
2. steady state-</span>all is the same and will always stay the same <span>
3. oscillating universe-</span>agrees with the big bang theory, but insists the universe expanded much quicker <span>
4. inflation-</span>it's like an inflating and deflating balloon that never stops 
3 0
3 years ago
Read 2 more answers
William adds two values , following the rules for using significant figures in computations. He should write the sum of these tw
yuradex [85]

Answer:

when it comes to adding or subtracting numbers, his final answer should have the same number of decimal places as the least precise value.

For example if you add 2 numbers; 10.443 + 3.5 , 10.443 has 3 decimal places and 3.5 has only one decimal place.

Therefore 3.5 is the less precise value.

So when adding these 2 values the final answer should have only one decimal place.

after adding we get 13.943 but it can have upto one decimal place. then the second decimal place is less than 5 so the answer should be rounded off to 13.9.

the answer is the same number of decimal places as the least precise value

Explanation:

I think this is the answer I'm not sure

7 0
2 years ago
Calculate the density of a substance for which 4.78 x 106 L of the substance has a mass of 1.50 x 107 kg. Express your answer us
valentinak56 [21]
7.89 is the correct answer I believe
4 0
3 years ago
Assuming an efficiency of 30.80%, calculate the actual yield of magnesium nitrate formed from 147.4g of magnesium and excess cop
Reil [10]

Answer:

The answer to your question is 280 g of Mg(NO₃)₂

Explanation:

Data

Efficiency = 30.80 %

Mg(NO₃)₂ = ?

Magnesium = 147.4 g

Copper (II) nitrate = excess

Balanced Reaction

                     Mg  +   Cu(NO₃)₂    ⇒    Mg(NO₃)₂   +   Cu

                  Reactants           Elements            Products

                         1                          Mg                     1

                         1                          Cu                      1

                         2                          N                       2

                         6                          O                       6

Process

1.- Calculate the theoretical yield

Molecular weight Mg = 24

Molecular weight Mg(NO₃)₂ = 24 + (14 x 2) + (16 x 6)

                                              = 24 + 28 + 96

                                              = 148 g

                           24 g of Mg  --------------------  148 g of Mg(NO₃)₂

                          147.4 g of Mg -------------------   x

                            x = (147.4 x 148) / 24

                            x = 908.96 g of Mg(NO₃)₂

2.- Calculate the Actual yield

yield percent = \frac{actual yield}{theoretical yield}

Solve for actual yield

Actual yield = Yield percent x Theoretical yield

Substitution

Actual yield = \frac{30.8}{100} x 908.96

Actual yield = 279.95 ≈ 280g

                     

4 0
3 years ago
Other questions:
  • Help me please somebody ??
    11·1 answer
  • How do you know if a reaction is exothermic? Enter your answer in the space provided
    9·1 answer
  • Please answer this, <br>Determine the weight of CaO produced by heating 70 g of CaCO3
    7·1 answer
  • Calculate the hfg and sfg of steam at 120oC from the Clapeyron equation, and compare them to the tabulated values.
    6·1 answer
  • Changes that occur during a chemical reaction are represented by a(n) _?_.
    9·1 answer
  • In what ways is the reaction between calcium and water different than the reactions between sodium and water, and potassium and
    7·1 answer
  • Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will____
    9·1 answer
  • 5. What mass of the following solutes will dissolve in 100 ml of water?
    10·2 answers
  • How many moles are 2.54 x 10^29 molecues of H2O
    5·1 answer
  • If a naturally occurring sample of an unidentified element is found to contain three isotopes (A, B, and C) and consists of 90.5
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!