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
Mama L [17]
3 years ago
12

What is the minimum number of kilojoules needed to change 40.0 grams of water at 100 degree celsius to steam at the same tempera

ture and pressure?
Chemistry
1 answer:
Lelechka [254]3 years ago
7 0
100 kilo-joules are needed to change.<span />
You might be interested in
A 25.0 mL sample of a saturated C a ( O H ) 2 solution is titrated with 0.029 M H C l , and the equivalence point is reached aft
Gnesinka [82]

Answer:

0.043 M

Explanation:

The reaction that takes place is:

  • Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

First we <u>calculate how many HCl moles reacted</u>, using the <em>given concentration and volume required to reach the equivalence point</em>:

  • 0.029 M HCl * 37.3 mL = 1.0817 mmol HCl = 1.0817 mmol H⁺

As 1 mol of H⁺ reacts with 1 mol of OH⁻, in the 25.0 mL of the Ca(OH)₂ sample there are 1.0817 mmoles of OH⁻.

With that in mind we can <u>calculate the hydroxide ion concentration in the original sample solution</u>, using <em>the calculated number of moles and given volume</em>:

  • 1.0817 mmol OH⁻ / 25.0 mL = 0.043 M
3 0
3 years ago
(20 POINTS) Easy Chemistry Question
koban [17]
The correct name for the hydrocarbon would be option 2. 2 - methyl - 2 - pentene.
6 0
3 years ago
Read 2 more answers
A barium hydroxide solution is prepared by dissolving 2.06 g of Ba(OH)2 in water to make 32.9 mL of solution. What is the concen
navik [9.2K]

Answer:  1.36 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

To calculate the moles, we use the equation:

moles of solute= \frac{\text {given mass}}{\text {molar mass}}=\frac{2.06g}{171g/mol}=0.0120moles

Molarity=\frac{0.0120\times 1000}{32.9}=0.364M

The balanced reaction between barium hydroxide and perchloric acid:

2HCIO_4+Ba(OH_)2\rightarrow BaCIO_4+2H_2O

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HClO_4

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is Ba(OH)_2

We are given:

n_1=1\\M_1=?\\V_1=8.50mL\\n_2=2\\M_2=0.364M\\V_2=15.9mL

Putting values in above equation, we get:

1\times M_1\times 8.50=2\times 0.364\times 15.9\\\\M_1=1.36M

Thus the concentration of the acid is 1.36 M

4 0
3 years ago
What happens to the molarity of bleach when you prepare a solution using 1 gallon of water and 5 table spoons of bleach (sodium
son4ous [18]

Answer:

Due to the presence of caustic soda in sodium hypo chlorite, the pH of the water is increased. When sodium hypo chlorite dissolves in water, two substances form, which play a role in for oxidation and disinfection. These are hypochlorous acid (HOCl) and the less active hypochlorite ion (OCl-).

Explanation:

6 0
3 years ago
Is it possible to see the tiny particles that make up a grain of sand
77julia77 [94]
Technically speaking, yes you can. Using a microscope though.
6 0
3 years ago
Read 2 more answers
Other questions:
  • When you weigh yourself on good old terra firma (solid ground), your weight is 151 lb . in an elevator your apparent weight is 1
    14·1 answer
  • sam bought 2 1/4 pounds of swiss cheese 1 1/2 pounds of cheddar at the deli how many pounds of cheese did sam buy altogether
    8·2 answers
  • Argon, which comprises almost 1 percent of the atmosphere, is approximately 27 times more abundant than CO2, but does not contri
    11·1 answer
  • Rank the following compounds in order of reactivity toward nitration with HNO3:_______. thiophene, benzene, 3-methylthiophene, a
    9·1 answer
  • What is the surface of Venus mainly composed of
    11·1 answer
  • Which of the following explains how all compounds are created?
    8·2 answers
  • Energy is used to combine amino acid building blocks in order to build a large protein. What type of reaction is this?
    13·1 answer
  • Please answer correctly nobody answers questions like this on brainly. BTW ITS STEM.
    8·1 answer
  • What was the hiker's average velocity during part C of the hike?
    8·1 answer
  • 1.The table below lists some of the common ingredients in toothpaste.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!