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Rasek [7]
2 years ago
10

How many molecules of H20 are in 1 mole of H20?​

Mathematics
1 answer:
likoan [24]2 years ago
6 0

one mole of water contains 6.02 x 1023 MOLECULES of water. But each molecule of water contains 2 H and 1 O atom = 3 atoms, so there are approximately 1.8 x 1024 atoms in a mole of water.

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13[6^2 divided by( 5^2 - 4^2)+9]<br><br> A. 169<br> B. 585 <br> C.181<br> D. 26
seraphim [82]

the answer is 585 im sure of it


7 0
3 years ago
Help me pleaseeeee :((
Sever21 [200]

Answer:

i believe the awnser is 0.5

4 0
2 years ago
Read 2 more answers
I will give BRAINLIEST to whoever is correct.
maw [93]
Remember, you can do anything to an equation as long as you do it to both sides

we hates fractions
times both sides by 3
(we could have added 1/3b to both sides but I'm lazy)


4b+6=12-b
add b to both sides
5b+6=12
minus 6 both sides
5b=6
divide both sides by 5
b=\frac{6}{5}
8 0
3 years ago
A certain brand of flood lamps has a lifetime that is normally distributed with a mean of 3,750 hours and a standard deviation o
vesna_86 [32]
Given that mean=3750 hours and standard deviation is 300:
Then:
<span>a. The probability that a lamp will last for more than 4,000 hours?
P(x>4000)=1-P(x<4000)
but
P(x<4000)=P(z<Z)
where:
z=(x-</span>μ)/σ
z=(4000-3750)/300
z=0.833333
thus
P(x<4000)=P(z<0.8333)=0.7967
thus
P(x>4000)=1-0.7967=0.2033

<span>b.What is the probability that a lamp will last less than 3,000 hours?
P(x<3000)=P(z<Z)
Z=(3000-3750)/300
z=-2.5
thus
P(x<3000)=P(z<-2.5)=0.0062

c. </span><span>.What lifetime should the manufacturer advertise for these lamps in order that only 4% of the lamps will burn out before the advertised lifetime?
the life time will be found as follows:
let the value be x
the value of z corresponding to 0.04 is z=-2.65
thus
using the formula for z-score:
-2.65=(x-3750)/300
solving for x we get:
-750=x-3750
x=-750+3750
x=3000</span>
7 0
3 years ago
35 less than seven times a certain number is fifty-three more than 3 times that number. What is the number?
Dovator [93]

Answer:

70

Step-by-step explanation:

6 0
3 years ago
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