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
Anna007 [38]
4 years ago
13

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. Which equation models t

he concentration of hydrogen ions (H+) of a solution whose pH is 7.2?
A. [H+] = log7.2
B. [H+] = -log7.2
C. [H+] = 10^-7.2
D.[H+] = 10^7.2
Mathematics
2 answers:
masya89 [10]4 years ago
5 0
PH is a parameter that tests the acidity or basicity of a substance or a solution. In this case, the formula to be followed is pH = –log[H+]. To get the H+ concentration from the pH, we manipulate the equation by raising both sides by the base of 10. Thus, 10^ -pH = H+. with pH of 7.2, thus the answer to this problem is C<span>[H+] = 10^-7.2</span>
Evgesh-ka [11]4 years ago
5 0

Answer:

c

Step-by-step explanation:

You might be interested in
Help! Please!
fomenos

Answer:

is the board game to BOARD for Neal so you have 1.54

Step-by-step explanation:

its ligit 5.5

6 0
3 years ago
What are the zeros of f(x) = x2 - x - 20?
sattari [20]

Answer:

(-4,0) and (5,0)

Step-by-step explanation:

Factor.

f(x) = x^2 -x - 20

Factors of -20 that when are added they equal -1

-5 and 4

(x-5) (x+4)

x=5 and x=-4

5 0
3 years ago
How many minuteds does it take to make one balloon sculpture? How many balloons are used in one sculpture
konstantin123 [22]

Answer:

It will take 5 minutes to make one balloon structure. 7 balloons are used in 1 sculpture For part b the answer would be: Tom's unit rate for balloons used per minute would be 1.4

Step-by-step explanation:

5 0
3 years ago
An analyst in Bank of America, Santa Clara University Branch, believes that on Mondays customers arrive at the bank with rate 50
Aleksandr-060686 [28]

Answer:

0.0821

Step-by-step explanation:

If the arrival rate is 50 customers per hour (60 minutes), then the expected number of customers in 3 minutes is:

\lambda=\frac{50}{60}*3\\ \lambda=2.5\ customers/3\ minutes

Assuming a Poisson distribution with 2.5 customers per 3 minutes, the probability that zero customers arrive for 3 minutes is:

P(x=k)=\frac{\lambda^k*e^{-\lambda}}{k!}\\P(x=0)=\frac{2.5^0*e^{-2.5}}{0!}\\ P(x=0)=0.0821

The probability that the bank stays empty for three minutes is 0.0821.

6 0
4 years ago
Please help I’m stuck!!
jolli1 [7]

Answer:

130 milliliters.

Step-by-step explanation:

a drug has a ratio of 115mg:5ml. This is equivalent to 23mg:1ml. 3g=3000mg, so we divide 3000 by 23 to get 130.434783. That is how many milliliters are needed. We round it to get 130 mL.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Simplify 8 over the quantity of 2 plus 2i.
    9·1 answer
  • What is the slope of the line that passes through the pair of points? (1, 7), (10, 1)
    10·2 answers
  • From 65 to 144 find each percent increase round to the nearest percent.
    14·2 answers
  • 14 is 70% of what number
    11·2 answers
  • Which point is closest to 7 on the number line?<br> ET<br> C0
    14·1 answer
  • Two sides of a right triangle have lengths of 26 units and 10 units. There are two possible lengths for the third side. What is
    15·1 answer
  • Vita has a piece of ribbon that is 5 meters long. She cuts the ribbon into pieces that are each 1/3 meter long. How many pieces
    13·1 answer
  • Help i dont know how to do the rest of this homework
    13·1 answer
  • Can someone pls help me??
    15·1 answer
  • Given P equals $11260, T equals six years, and R equals 7.5% compounded weekly. Use the correct compound interest formula to cal
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!