Answer:
[tex]pH = 13[/tex] --- Oven Cleaner
[tex]pH = 6.2[/tex] --- Water
[tex]pH =7.4[/tex] --- Blood
[tex]pH = 2.2[/tex] --- Vinegar
Step-by-step explanation:
The given molar concentration are:[Missing from the question]
Oven Cleaner: [h+] = [tex]10^{-13}[/tex]
Water: [h+] = [tex]0.0000007[/tex]
Blood: [h+] = [tex]0.00000004[/tex]
Vinegar: [h+] = [tex]0.0063[/tex]
Required
Determine the pH
pH is calculated using:
[tex]pH = -\log(h+)[/tex]
So, we have:
Oven Cleaner:
[tex]pH = -\log(10^{-13})[/tex]
Using a calculator, we have:
[tex]pH = 13[/tex]
Water:
[tex]pH = -\log(0.0000007)[/tex]
Using a calculator, we have:
[tex]pH = -1*-6.2[/tex]
[tex]pH = 6.2[/tex]
Blood:
[tex]pH = -\log(0.00000004)[/tex]
Using a calculator, we have:
[tex]pH = -1 * -7.4[/tex]
[tex]pH =7.4[/tex]
Vinegar:
[tex]pH = -\log(0.0063 )[/tex]
Using a calculator, we have:
[tex]pH = -1 * -2.2[/tex]
[tex]pH = 2.2[/tex]
Which comparison is not correct?
-2 > -7
1 < -9
-3 > -8
6 > 5
HEEEEELLLLLPPPPPPPPP!!!!!!!!!!
Answer:
C would be correct go six from the decimal point and 8 should be there because its negative
Step-by-step explanation:
can you pls give me the circumferance and area of the circle pls. its due today. thx. will give brainliest to the first on to give me the answers. links and bots will get reported.
Answer:4=213.52
5=3631.68
Step-by-step explanation:i used a calculator so i dont know if i got it right
If 3 inches equals 20 miles on map,
how
many inches is 72 miles?
Answer:
10.8 inches
Step-by-step explanation:
72/20=3.6
3.6*3=10.8
Which expression has the same value as the one below?
10+(3)
Answer:
The answer is B: 10 + 3 = 7
Solve each system of equations.
1. 2x - 4y = 20
x = 4
2. y = 6x + 11
2x - 3y = 7
A wise man once said, "500 reduced by 4 times my age is 188." What is his age?
Answer:
125
Step-by-step explanation:
Answer:
He Is 78 Years Old.
Step-by-step explanation:
a = age
Solve for a in 500 - 4a = 188.
Simplify 500−4a=188.
500−4a=188
500+−4a=188
−4a+500=188
Subtract 500 from both sides.
−4a+500−500=188−500
-4a = -312
Divide both sides by -4.
[tex]\frac{-4a}{-4} =\frac{-312}{-4}[/tex]
a = 78
Answer:
He Is 78 Years Old.
- 5x^2-6y^2, when x = 1 and y=2
Answer:
-29
Step-by-step explanation:
-5x^2-6y^2
substitute the x and y values
-5(1)^2-6(2)^2
-5-6*4
-5-24
-29
cos²x - sin²x = 0,66
x = 24.35°
Step-by-step explanation:
Recall that
cos²x - sin²x = cos 2x
which means that
cos 2x = 0.66 ---> 2x = cos^-1 (0.66) = 48.7°
or x = 24.35°
Answer:
x = 24.35, 155.65, 204.35, 335.65 degrees ( for 0 < x < 360 degrees).
Step-by-step explanation:
cos²x - sin²x = 0.66
cos^2 x = 1 - sin^2 x so
1 - sin^2 x - sin^2 x = 0.66
1 - 2sin^2 x = 0.66
2sin^2 x = 1 - 0.66
sin^2x = 0.34/2 = 0.17
sin x = +/- √0.17
= +/- 0.41231
x = 24.35 degrees ( in first quadrant)
and 180 + 24.35 = 204.35 degrees in third quadrant.
Mika is a local farmer who is interested in how often residents in her town go to a farmer's market each month. She surveys 124
families and finds that, on average, those families visit a farmers' market 4.2
times per month with a sample standard deviation of 1.3
. If Mika wants to be 99%
confident (z=2.58
) using this sample, what should her margin of error be and what does it mean?
Answer:
its B because of the transmission and the forms put together in the same place bio log
TEST! PLEASE HELP! 40 points!
A cylindrical metal pipe has a diameter of 20 millimeters and a height of 21 millimeters. A cylindrical hole cut out of the center has a radius of 6 millimeters.
A cylinder is shown. A smaller cylinder is cut out of the middle of the larger cylinder. Both have a height of 21 millimeters. The diameter of the larger cylinder is 20 millimeters, and the the radius of the smaller cylinder is 6 millimeters.
Which expressions represent the volume of metal needed, in cubic millimeters, to make the pipe? Select two options.
21π(10)2 – 21π(6)2
π(20)2(21) – π(6)2
2,100π – 756π
7,644π
1,344
Answer:
Options A and C are correct choices.
Hope helps
:3
Answer:
A, C or 1, 3
Step-by-step explanation:
Trust the process
edge 2021
There is a bag of marbles that contains 4 blue marbles, 3 red marbles, 2 green marbles, and 1 brown marble. If one was picked at random, not replaced, and another was picked, what is the probability of both marbles selected to be blue?
Answer:
2/15
Step-by-step explanation:
P(B,B) = 4/10 x 3/9
= 2/5 x 1/3 or 2/15
help me please thank you
Answer: exponential
Step-by-step explanation:
its exponential
count the squares in each one
first is 2 squares
second is 4 squares
third is 8 squares
this is going up exponentially because the first one would be 2^1 the second would be 2^2 and the third would be 2^3
Suppose you brought 8 oranges and 1 grapefruit for a total price of $4.60. Later that day, you brought 6 oranges and 3 grapefruits for a total price of $4.80.What's the price of each type of fruit.
Answer:
assuming the prices did not change during the day,
8o+g=460
6o+3g=480
18o=900
o=50
g=60
so, oranges cost $0.50, grapefruit cost $0.60
Step-by-step explanation:
do good !
Answer:
oranges $0.5 grapefruit 0.6
Step-by-step explanation:
o = oranges
g= grapefruit
8o +1 g = 4.60
6o+3g= 4.80
Multiply the first by -3
-24o -3g = -13.80
6o +3g = 4.80
ADD BOTH (3g will be cancelled)
-18o = -9.00
o = 9/18 = 0.5
8(0.5) +1g= 4.60
4.00 +g = 4.60
g = 0.60
Help me solve this, for 15 points, I need it for my homework teehee.
Answer:
its wrong because verticle angles would need to be opposite of each other, not right next to each other. ACB and FCE would be correct
Step-by-step explanation:
im not too sure how to explain it, verticle angles are across from each other
A. Diameter
B. Tangent
C. Chord
D. Secant
Can someone help me out my grads are bad
Answer:
50 cm^2
Step-by-step explanation:
In this scale 4 cm = 10 m
and 2 cm = 5 m
10 m x 5 m = 50 m^2
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
-2, -10,-50, -250 what is the ninth term, the fifth term and what is the common ratio? What is a rule for this sequence
PLEASE HELP ME!
What are the coordinates of this point?
PLEASE HELP
Answer:
(-5, -1)
Step-by-step explanation:
The rest are incorrect.
If no mechanical energy were lost, a skateboarder descending a straight 40 meter slope would arrive at its foot with speed of 15 m/s.Calculate the angle the slope makes with the horizontal
Answer:
Answer
Step-by-step explanation:
Step-by-step explanation
Can SOMEONE PLz help meeee...
i really need help on this one!!
Answer:
it should be 137 bc its across from it....
Step-by-step explanation:
help, what's the range?
Answer:
[3,∞)
3 ≤y<∞
Step-by-step explanation:
The range is the values the output takes
The y value goes from 3 ( includes 3) to positive infinity
[3,∞)
3 ≤y<∞
PLEASE HELP ASAP BEST ANSWER WILL GET BRAINILEST
Answer:
the answer is c) 9 pounds 7 ounces
Step-by-step explanation:
Because he is gaining 5 ounces a week for 4 weeks
5 times 4= 20 ounces or 1.25 pounds
9 pounds+20 ounces= 9 pounds 7 ounces
Answer:c
Step-by-step explanation:
8lb 3 ounces + 20 ounces (16 ounces=1lb)
Because 20 is greater than 16 we know he should be at least 9 pounds so C
solve (200 + 200) √100
Answer:
4000
Step-by-step explanation:
200 + 200 {100
400 × 10
4000
Answer:
4000
Step-by-step explanation:
because the 200+200 are in parenthesis that shows that you will need to do it first.
so.. 200+200=400
and now the second part is asking for the square root of 100. We know that 10 times 10 is 100. This means that 10 is the square root of 100.
And for our last step they ask to multiply our two answers.
so 400 x 10= 4000
please help me pleaseeeeee
Answer: c=35
D=90
E=55
Step-by-step explanation:
Since d is a right angle it is 90. Take 90 and subtract it from 180 to get 90.Set them equal to 90 so 3x+11+5x+15=90
Simplify
8x+26=90
8x=64
X=8
Now take x and plug it in for each equation
3(8)+11=35
5(8)+15=55
So measured of c is 35
Measure of e is 55
And d is 90
hope this helps
Please help me thanks
Answer:
5
Step-by-step explanation:
If you multiply the square root of any number by the square root of the same number you get that number.
The graph shows the results of tossing two coins 20 times. The two sides of the coin show heads (H) and tails (T). Based on the results, what is the probability that both coins will show heads the next time the coins are tossed? 17 20 Two Coin Toss 8 CON Frequency ONWAY 3 20 HT TH HH IT 3 10
You forgot the picture
The probability that both coins will show heads the next time the coins are tossed is 3/20.
What is probability?Probability is the likelihood that an event will occur and is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
From the graph, Total number of outcomes= 7+6+4+3=20
Outcomes for both head =6
Then, P(HH)= 6/20
=3/10
Hence, probability that both coins will show heads is 3/20.
Learn more about probability here:
brainly.com/question/11234923
#SPJ2
Can yall pleas help me with this!!!!!!!
Answer:
5. Obtuse 6. Right 7. Straight 8. Acute 9. Acute 10. Right
so quick explanation acute is smaller than 90 degrees right angle is exactly 90 degrees an obtuse angle is over 90 degrees and a straight angle is 180 degrees also straight
Which expression is equivalent to (2^−1⋅2^3) ^−1 ?
a) 16
b) 1/16
c) 1/2
d) 1/4
Answer:
d for sure jsjeieoeoeooeiekekejej answer is not being send because of less typing so .