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
makkiz [27]
3 years ago
12

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

pH of a solution whose hydrogen ion concentration is 2*10^-9
A. 1.0
B. 2.9
C. 8.7
D. 9.3
Mathematics
2 answers:
wariber [46]3 years ago
6 0

Answer:

ANSWWER IS C.8.7

Step-by-step explanation:

I JUST TOOK THE TEST

Korolek [52]3 years ago
5 0
PH = -log[H+]
= -log(2*10^-9)
= -(log(2) +log(10^-9))
= -(0.3 -9)
= 8.7

The appropriate choice is
  C. 8.7
You might be interested in
The ratio of males to females at a party is 3 : 5
EastWind [94]
If there are 12 more females and the ratio is two up in favour of females that means that 1 equals to 6, so there are 30 females and 18 males. (30 + 18 = 48)
6 0
3 years ago
Read 2 more answers
What's the slope and intercept of y=4x-7
zalisa [80]

Answer:

the slope is 4 and the y-intercept is -7

Step-by-step explanation:

3 0
3 years ago
A ​$310 suit is marked down by 20​%. Find the sale price.
loris [4]

Answer:

the answer is 62!

Step-by-step explanation:

multiply

5 0
2 years ago
Read 2 more answers
A truck can be rented from Company A for ​$70 a day plus ​$0.50 per mile. Company B charges ​$20 a day plus ​$0.60 per mile to r
r-ruslan [8.4K]

Answer:

The rental cost for Company A and Company B will be the same after 500 miles

Step-by-step explanation:

The total cost of renting a truck from Company A can be expressed as;

Total rental cost(Company A)=Cost per day+Total rate

where;

Cost per day=70

Total rate=rate per mile×number of miles (m)=(0.5×m)=0.5 m

replacing;

Total rental cost(Company A)=70+0.5 m...equation 1

2. The total cost of renting a truck from Company B can be expressed as;

Total rental cost(Company B)=Cost per day+Total rate

where;

Cost per day=20

Total rate=rate per mile×number of miles (m)=(0.6×m)=0.6 m

replacing;

Total rental cost(Company B)=20+0.6 m...equation 2

Equating equation 1 to equation 2

70+0.5 m=20+0.6 m

0.6 m-0.5 m=70-20

0.1 m=50

m=50/0.1

m=500 miles

The rental cost for Company A and Company B will be the same after 500 miles

7 0
3 years ago
1/3 divide by 1/15 I need this answer
11111nata11111 [884]

Answer:

5

Step-by-step explanation:

Hope this helps :)

4 0
2 years ago
Other questions:
  • Flip a coin 10 times and record the observed number of heads and tails. For example, with 10 flips one might get 6 heads and 4 t
    5·1 answer
  • Which triangles could not be similar to triangle ABC ? triangle a b c where angle b is a right angle. side a b is 15 cm. side b
    5·1 answer
  • What does 2.975 round to?
    9·2 answers
  • My uncle had 12 pieces of pizza in his refrigerator. My brother ate two-thirds of the pizza. I ate 1/12 of the pizza. What fract
    12·1 answer
  • The first four terms of a sequence are shown below. 2, 9, 40.5, 182.25 . . . What is the next number in the sequence?
    8·1 answer
  • Add the following with conversion.
    13·1 answer
  • Can I get some help on this please:/
    6·1 answer
  • Is this right?? if not help please!!
    14·1 answer
  • Tyler also wants to leave a tip for the server. How much do you think he should pay in all? Explain your reasoning.
    9·1 answer
  • Work out 5 x 10^6 / 4 x 10^4<br> Give your answer as an ordinary number.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!