Answer:
46.5
explanation
6.022*10^23 molecules=40g.
7.00*10^23=40*7.00*10^23/6.022*10^23 g =46.5 g
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.65g are 7.00 x 10²² molecules of NaOH.
What is mole?The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of NaOH= 7.00 x 10²² atoms
Substituting the values
mole=7.00 x 10²²÷ 6.022×10²³
mole =0.116 moles of NaOH
mass of NaOH= Molar mass of NaOH× moles of NaOH
= 40 × 0.116
= 4.65g
Therefore, 4.65g are 7.00 x 10²² molecules of NaOH.
To know more about mole, here:
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Michelle and Natasha each had to repair their new iPhones. The initial cost of each repair is $100. Michelle and Natasha each have two discount coupons. Each of them uses both coupons toward the cost of the repair. One coupon is for $25 off the repair cost and the other coupon is for 20% off the repair cost. Michelle and Natasha use their coupons in a different order, as shown below.
Michelle uses the 20% off the repair cost coupon first. She then uses the $25 off the repair cost coupon on the remaining balance.
Natasha uses the $25 off the repair cost coupon first. She then uses the 20% off the repair cost coupon on the remaining balance.
Who paid the least amount of money for the iPhone repair?
Answer:
natasha paid the least amount
what is 100 + 84 – 62x = 494
Answer:
X= -5
Step-by-step explanation:
Good luck!
Answer:
X=-5
Step-by-step explanation:
100 + 84 - 62x =494
184 - 62x =494
494-184 = -62x
310 =-62x
310/-62 =x
X= -5
Si se llenan 45 frascos de 200 gramos de mayonesa cuantos frascos de 150 gramos se puede llenar con la misma cantidad
Answer:
45x200gr/150gr= 60
Step-by-step explanation:
Fill in the factor:
11 × ___=99
Answer:
9
Step-by-step explanation:
11 × 9 = 99
You save $1400 from a summer job. You decide to put it into an account that earns simple annual interest. After 9 months, your balance is $1421. Find the annual interest rate.
Answer:
2%
Step-by-step explanation:
Calculate annual interest amount first:
annual interest x 9/12=21
Annual interest =21x12/9
annual interest amount=$28
calculate annual interest rate
1400 x interest rate = annual interest
$1400 x interest rate = $28
interest rate =$28/1400
interest rate=.02 or 2%
Harper is working two summer jobs, making $19 per hour lifeguarding and making $8 per hour walking dogs. In a given week, she can work at most 7 total hours and must earn a minimum of $80. If x x represents the number of hours lifeguarding and y y represents the number of hours walking dogs, write and solve a system of inequalities graphically and determine one possible solution.
Answer:
We know that:
She makes $19 per hour of lifeguarding.
She makes $8 per hour walking dogs.
She can work at most 7 hours per week.
She must earn a minimum of $80 per week.
If x represents the number of hours lifeguarding and y represents the number of hours walking dogs, the inequalities will be:
x + y ≥ 7 hours.
(this says that she can work at most 7 hours per week)
x*$19 + y*$8 ≥ $80
(this says that she can earn a minimum of $80)
Then the system of inequalities is:
x + y ≥ 7 hours.
x*$19 + y*$8 ≥ $80
To graph these two we can write them as lines in standard form and simply graph both inequalities, the solution of the system will be the intersection between the solutions of each inequality.
Here we also should add the inequalities:
x ≥ 0
y ≥ 0
So we only look at the first quadrant.
The graph can be seen in the image below: (the dark blue is the solution region for the first inequality, the light blue one is the solution region for the second inequality)
One possible solution can be:
x = 4 and y = 1
or
x = 4 and y = 2
and there are a lot of other possible solutions.
Answer:
Step-by-step explanation:
Observa las siguientes imágenes formadas por círculos:
Figura 1 (un circulo) Figura 2 (5 círculos)
-¿Cuántos círculos tendrá la Imagen 10?
-¿Cuántos círculos más tendrá la imagen 12 respecto de la imagen 7? ¿Puedes saberlo sin necesidad de encontrar la cantidad de círculos de cada imagen? ¿Cómo?
Veremos que en la imagen 10 hay 37 circulos, y la diferencia entre las imagenes 12 y 7 es de 20 circulos.
¿Como encontrar el patrón?
Primero, debemos contar la cantidad de circulos que tenemos en las imagenes mostradas.
En la primera, tenemos 1 circulo.En la segunda, hay 5 circulos.En la tercera, hay 9 circulos.En la cuarta, hay 13 circulos.Entonces podemos ver que en cada imagen se agregan 4 circulos, es decir tenemos una secuencia aritmetica, de tal forma que la imagen número N tendremos:
[tex]C_N = 1 + (N - 1)*4[/tex]
Entonces, cuantos circulos hay en la imagen 10? para ver eso reemplazamos N por 10.
[tex]C_{10} = 1 + (10 - 1)*4 = 37[/tex]
¿Cuántos círculos más tendrá la imagen 12 respecto de la imagen 7?
Para ver esto calculamos:
[tex]C_12 - C_7 = (1 + (12 - 1)*4) - (1 + (7 - 1)*4) = 11*4 - 6*4 = 20[/tex]
Es decir, la image 12 tiene 20 circulos más que la imagen 7.
Sí quieres aprender más sobre secuencias, puedes leer:
https://brainly.com/question/7882626
-24 + 12d = 2(d-3) + 22
PLS HELP 55 POINTS PLSS NO LINKS PLS HELPP
Answer:
12. 114 Laps
13. 234 students don't ride the bus.
14. 1.5% of 26,500.60 is 397.50 so the answer is $26,500.60
15. 24% × 63.4 = 15.2 so the original weight of the bag is 63.4 pounds
Step-by-step explanation:
b) 1325 + 13 long division
Answer:
1325 divided by 13 is 101.92 rounded to the nearest hundredth
Step-by-step explanation:
I'm not sure what the question is asking though.
(2a²b 5)2 (ab 332
22(a²b-c-3)(a?c%)
how many hundreths is 8.3
Answer:
3 tenths and 0 hundreths
Step-by-step explanation:
3 is in the tenths place.
So 3 tenths.
There is no value in the hundreths place
So 0 hundreths
if y=27 when x= 8 find y when x =11
Answer:
37 1/8
Step-by-step explanation:
The problem probably assumes direct variation
y=kx
IF so, then plug in the values and solve for k
27=k(8)
k = 27/8
y= (27/8)x. Now let x = 11
y = (27/8)11 = 27(11)/8 = 37.125 = 37 1/8
y = 37 1/8
the problem is making some assumption about the relation between x and y. The simplest assumption that's likely is direct variation, that x and y are linearly related. The graph is a straight line through the origin with slope = 27/8
please help !!
25 points !!!
Answer:
30
Step-by-step explanation:
70-40=30
Which of the following represents discrete data? Question 7 options: The number of beads in a jar The volume of water in a glass Fruit per pound The speed of a motorcycle
Answer:
the number of beads in a jar. took test got it right.
Step-by-step explanation:
The option that represents a discrete data is the number of beads in a jar.
What is discrete data?Discrete data is data that contains integers that can only be a limited number of possible values. An example of discrete data is the number of students in a class.
Discrete data has the following properties:
finite numeric countablenon-negative integers.What is the sum of 25 57/100 + 72 9/10 and 362 17/100 + 49 3/10
Answer:
509.94
Step-by-step explanation:
That's the answer!
trust me! Correct me if I'm wrong
don't worry I solved it so many
times and that's the answer
hope it helps you ❤
follow me for more!
first on is 98.47
second one is 411.47
Hop this helps :T
Helppp do any understand rhis ?
Answer:
x= 25 degrees
Step-by-step explanation:
A triangle has a total of 180 degrees.
110 degrees + 45 degrees = 155 degrees
180 degrees - 155 degrees = 25 degrees
name the solid figure formed by the net
Answer:
A
Step-by-step explanation:
I need help geometry !
‼️Someone help please..
Find the missing term in each sequence
Answer:-170
Step-by-step explanation:as you can see it is going in a pattern from the negative ok thanks.
HOW DO YOU SOLVE THESE DIAMOND PATTERNS!!
4 = 4 ( x + 10 ) solve for x
Answer:
x = -9
Step-by-step explanation:
mark helpfull give 5str and award brainliest
Answer:
x = -9
Step-by-step explanation:
4 = 4(x + 10)
=> 4/4 = x + 10
=> 1 = x + 10
=> x + 10 = 1
=> x = 1 - 10
=> x = -9
Find the area of the shape, there are 6 sides
Answer:
Step-by-step explanation:
all the three sides of a triangle are equal.
length of perpendicular from center on the side=[tex]h=\sqrt{21^2-(\frac{21}{2})^2} =\frac{21}{2}\sqrt{3} \\area ~of~shape=6 \times \frac{1}{2} \times 21 \times \frac{21}{2}\sqrt{3} \\=\frac{1321}{2}\sqrt{3} ~sq. ~ft.[/tex]
wright this without exponents
-2u^5*6u^3
Answer:
-12u^8
Step-by-step explanation:
What is the measure of <4? Enter your answer in the box.
m<4=
Answer:
59
Step-by-step explanation:
These angles make linear pair
so angle 4 +60+61=180
Angle 4 = 180-121 = 59
NO LINKS PLEASE what is y? (please explain the steps too :))
y=3(19)-5 y=2(19)+14
Answer:
solution given:
y=3(19)-5=57-5=52
y=2(19)+14=2×19+14=38+14=52
:.
y=52
Answer:
y = 52
Step-by-step explanation:
Order of operation says we must multiply before you subtract or add.
So 3 * 19 = 57 then subtract 5 you get 52.
Next 2 * 19 = 38 then 38 + 14 = 52
7b-3<11
Is anyone know the answer
Answer:
b < 2
Step-by-step explanation:
7b - 3 < 11
add 3
7b < 14
divide
b < 2
Answer:b<2
Step-by-step explanation:
Can someone please help me with math.
Ok I need help what is If X = 8 units, Y = 4 units, and Z = 6 units, what is the volume of the rectangular prism shown above?
In a population of adults the proportions of people in various marital status are: Single:35%, Married: 60%, Divorced: 5%. A person is selected at random. If that person is not divorced find the probability that he or she is single.
Answer:
7/20 0r 0.35
Step-by-step explanation:
Probability of been single = percentage of single adult / sum of percentages
sum of percentages = 35 + 60 + 5 = 100
35/100 = 7/20 or 0.35
