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
Katena32 [7]
3 years ago
15

Which expression represents this word phrase?

Chemistry
2 answers:
ZanzabumX [31]3 years ago
6 0
Answer: B


The quotient is what you get when you divide two numbers by each other so therefore x divided by 9. And then 7 less than that number
Allushta [10]3 years ago
5 0

Answer:

B. (x÷9)-7

Explanation:

The quotient is the answer of division, therefore we know that x is divided by 9. We know which is divided by which because of the order the phrase is written. So far we have:

x ÷ 9

Now we subtract seven because the phrase states that it is seven less then the quotient. Therfore our answer is:

(x ÷ 9) - 7

You might be interested in
As the ph approaches 0, what happens to the concentration of h3o+ ions?
natta225 [31]

We know that

pH = -log[H+]

the pH value falls in between 0- 7 for acids

As the pH value increases the concentration of [H+] increases.

similarly as the value of pH approaches 0, the concentration of H+ increases

The solution said to become more acidic

Also

[H+] X [OH-] = 10^-14

Thus pH + pOH = 14

hence the concentration of OH- decreases as the pH approaches zero

6 0
3 years ago
Fill in the coefficients that will balance the following reaction:
Alex17521 [72]

Answer:

To balance a reaction, the amount of reactants must be equal to the amount of products, as stated by the Law of Conservation of Matter. It may help you to keep track of  the number of each element in a list as you try to balance. It's not able to be balanced.

3 0
2 years ago
Read 2 more answers
Hello! Can you please help me do this question? I have to pick two but I’m not really sure what to pick..
In-s [12.5K]

Answer:

B and D

Explanation:

it is B and D because in no gravity  if you change the size of the ball it does not change anything. and if you swing fast it does not change anything but the speed. if you change the angle it is just the same modle but different angle

7 0
3 years ago
Read 2 more answers
What is the mass of silver (107.87 g/mol) produced by the reaction of 3.00 moles of copper with 3.00 moles of silver nitrate?Cu
vladimir2022 [97]

Answer: 323.61 g of Ag will be produced

Explanation:

The given balanced chemical reaction is :

Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag

According to stoichiometry :

2 moles of AgNO_3 require 1 mole of Cu

Thus 3.00 moles of  AgNO_3 will require=\frac{1}{2}\times 3.00=1.50moles  of Cu

Thus AgNO_3 is the limiting reagent as it limits the formation of product.

As 2 moles of AgNO_3 give =  2 moles of Ag

Thus 3.00 moles of AgNO_3 give =\frac{2}{2}\times 3.00=3.00moles  of Ag

Mass of Ag=moles\times {\text {Molar mass}}=3.00moles\times 107.87g/mol=323.61g

Thus 323.61 g of Ag will be produced from the given moles of both reactants.

3 0
3 years ago
The pka of hco3 - (or pka2 of h2co3) is 10.33. what is the ph of a solution that has 0.1 m na2co3 and 1.0 m nahco3?
Margarita [4]

The given solution is a mixture of NaHCO_{3}and Na_{2}CO_{3}. It acts as a buffer as it is a combination of the weak acid HCO_{3}^{-}and it's conjugate base CO_{3}^{2-}.

[Acid] = [HCO_{3}^{-}]=1.0 M

[Base] =[CO_{3}^{2-}]=0.1 M

pH of the buffer solution can be calculated from Hendersen-Hasselbalch equation as below:

pH=pK_{a}+log\frac{[CO_{3}^{2-}]}{[HCO_{3}^{-}]}

pH=10.33+log\frac{0.1}{1.0}

pH = 10.33+(-1)

     = 9.33


4 0
3 years ago
Other questions:
  • Write the electron configuration for each atom<br><br> A. Carbon<br> B. Argon<br> C. Nickel
    8·1 answer
  • How many kilograms of the rock must be processed to obtain 2.0 kg of Pb ?
    8·1 answer
  • Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. suppose that the volume of a parti
    9·2 answers
  • How does transcription work
    10·1 answer
  • What is the Molarity of a solution of HNO3 if it contains 12.6 moles in a<br> 0.75 L solution? *
    11·2 answers
  • You have an atom with 3 protons ,4 neutrons ,and 3 electrons .adding a neutron will ...
    7·2 answers
  • Directions: Show all of your work for each of the following problems.
    9·1 answer
  • Helppp mehhh thanks:))
    14·1 answer
  • Air trapped in a cylinder fitted with a piston occupies 142.8 mL at 0.97 kPa pressure.
    15·1 answer
  • 2C2H2 + 502 = 4CO2 + 2H20<br>when 20000g of 2C2H2 + 5O2 = how much 4CO2?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!