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
MissTica
2 years ago
10

Will give brainliest

Chemistry
1 answer:
Dafna1 [17]2 years ago
3 0

sorry i know this:

4. 2 methyl 2 heptene

You might be interested in
Positron emission of technetium-95
NNADVOKAT [17]
Idk it’s making me answer a question in order to get help on my own
5 0
3 years ago
How many moles of HNO3 are present if 4.90×10−2 mol of Ba(OH)2 was needed to neutralize the acid solution?
Amiraneli [1.4K]

Answer:

0.098 moles

Explanation:

Let y represent the number of moles present

1 mole of Ba(OH)₂ contains 2 moles of OH- ions.

Hence, 0.049 moles of Ba(OH)2 contains y moles of OH- ions.

To get the y moles, we then do cross multiplication

1 mole *  y mole = 2 moles * 0.049 mole

y mole = 2 * 0.049 / 1

y mole =  0.098 moles of OH- ions.

1 mole of OH- can neutralize 1 mole of H+

Therefore, 0.098 moles of HNO₃ are present.

3 0
3 years ago
How does the freezing point of water from the ocean compare to distilled water one buys at the store?
Lelechka [254]
Due to prescence of any impurity, there will be change in physical properties of any liquid. 
8 0
3 years ago
Read 2 more answers
PLEASE HELP NO LINKS OR FILES
podryga [215]

Answer:

Rise surface fall surface rise

Explanation:

Hope this helps!

5 0
3 years ago
A 1.50 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 0.100 moles
alexgriva [62]

Answer : The pH of the solution is, 3.41

Explanation :

First we have to calculate the moles of HF.

\text{Moles of HF}=\text{Concentration of HF}\times \text{Volume of solution}

\text{Moles of HF}=0.250M\times 1.50L=0.375mol

Now we have to calculate the value of pK_a.

The expression used for the calculation of pK_a is,

pK_a=-\log (K_a)

Now put the value of K_a in this expression, we get:

pK_a=-\log (6.8\times 10^{-4})

pK_a=4-\log (6.8)

pK_a=3.17

The reaction will be:

                             HF+OH^-\rightleftharpoons F^-+H_2O

Initial moles     0.375     0.100   0.375

At eqm.   (0.375-0.100)      0     (0.375+0.100)

                     = 0.275                    = 0.475

Now we have to calculate the pH of solution.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[F^-]}{[HF]}

Now put all the given values in this expression, we get:

pH=3.17+\log [\frac{(\frac{0.475}{1.50})}{(\frac{0.275}{1.50})}]

pH=3.41

Thus, the pH of the solution is, 3.41

8 0
3 years ago
Other questions:
  • How many grams of sodium nitrate<br>are needed to make 3L of 9.05<br>Solution?​
    6·1 answer
  • What is the initial rate when the initial concentrations of both reactants are 0.16M ? The initial rates listed in the following
    15·1 answer
  • The density of solid fe is 7.87 g/cm3. how many atoms are present per cubic centimeter of fe?
    7·2 answers
  • An ideal gas (C}R), flowing at 4 kmol/h, expands isothermally at 475 Kfrom 100 to 50 kPa through a rigid device. If the power pr
    11·1 answer
  • Arrange the following foods in order of increasing acidity : beets. PH=5.9;Camembert cheese,PH=7.4;egg white,pH=8.0;sauerkraut,P
    15·1 answer
  • Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that t
    14·2 answers
  • If Li loses an electron to another atom, why is it written Li^+1 (with a +1)
    11·1 answer
  • Which of the following statements is true?
    7·2 answers
  • How does an object in motion stay in motion unless acted upon by an unbalanced force
    10·1 answer
  • Glycerol (molar mass 92.09 g/mol) has been suggested for use as an alternative fuel. The enthalpy of combustion, Δ
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!