Answer:
The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.
Step-by-step explanation:
Avogadro's Number or Avogadro's Constant is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and it applies to any substance.
Then you can apply the following rule of three: if 6.023*10²³ molecules are present in 1 mole, 3.13*10²³ molecules are present in how many moles?
[tex]moles=\frac{3.13*10^{23}molecules*1 mole }{6.023*10^{23}molecules}[/tex]
moles= 0.52
Since the molar mass of carbon dioxide is 44 g / mole, then the following rule of three can be applied: if there are 44 g in 1 mole, how much mass is there in 0.52 moles?
[tex]mass=\frac{0.52 moles*44 g}{1 mole}[/tex]
mass= 22.88 g
The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.
At Creekland Middle School, there are 5 art classes with 24 students in each class. How many students altogether are in the art classes?
Answer:
120
Step-by-step explanation:
Okay you take the 24 students in each class
Then you take the 5 art classes in the school
Then you take the 5 and 24 and multiply them
And the sum of that is 120 and there
Pretend you are living five hundred years in the future. Write a one-page diary entry describing what you encounter in a typical day. Do you enjoy your life? What kind of friends do you have? What type of activities are you involved in? What kind of problems, if any, do you experience?
Step-by-step explanation:
Imagining living a life for five hundred years in the future, can have two perspectives considering the reality of today's society.
Let us suppose that we currently overcome all challenges related to preserving the environment, sustainable consumption, violence, and racial discrimination. Well, considering that point of view, a typical day five hundred years from now would be a lot of fun, I imagine that we would have great biodiversity preservation centers, people would be more cordial with others, everyone would have access to education and essential rights, and we would use more bicycles as a means of transport, because even if they had already managed to invent teleportation, the bicycle would still be a good option for the practice of physical exercises.
84.695 to 1 significant factor
Answer:
___
= 80
I hope this helps you, and i hope you have a nice day.
Write an equation for the line parallel to the given line that contains C.
C(3,8); y = - 2x + 3
y =
(Type your answer in slope-intercept form.)
Answer:
?
Step-by-step explanation:
Answer:
your doing the same thing i just did but the answer is slope is 2x and intercept is 3
Solve inequality 5x+3>48
Answer:
x>9
Step-by-step explanation:
Answer:
x > 9
Step-by-step explanation:
Simply solve for x.
What we have to do is subtract 3 from both sides, then divide by 5 to both sides.
5x > 45
x > 9
x is greater than 9.
#teamtrees #WAP (Water And Plant)
Jackie has a maximum of $450 to spend on shirts and jeans. The shirts she wants to buy are $12 each, including tax. The jeans she wants to buy are $27 each, including tax. What is an inequality that represents all possible combinations of s, the number of shirts, and j, pairs of jeans, Jackie can buy
Answer: 12s+27j≤450
Step-by-step explanation:
From the question, we are informed that Jackie has a maximum of $450 to spend on shirts and jeans and that the shirts she wants to buy are $12 each, including tax while the jeans she wants to buy are $27 each, including tax.
The inequality that represents all possible combinations of s, the number of shirts, and j, pairs of jeans, Jackie can buy will be:
= 12s+27j≤450
2. A tree casts a shadow 25m long. At the same time, a signpost next
to the tree casts a shadow 6m long. The signpost is 3.5m tall. How
tall is the tree?
(10 pts.)
Answer:
The height of the tree is 14.85[tex]\bar 3[/tex] m
Step-by-step explanation:
The length of the shadow cast by the tree = 25 m
The length of the shadow cast by the signpost = 6 m
The height of the signpost = 3.5 m
Therefore, by similar triangles, we have;
Let θ, represent the angle formed by the line extending a line from the tip of the shadow, to the tip of the object and let x represent the height of the tree, we have
Tan(θ) = Opposite/Adjacent = Height of the object/(The length of the shadow)
∴ Tan(θ) = 3.5/6 = x/25
x = 25 × 3.5/6 = 14.58[tex]\bar 3[/tex]
The height of the tree = x = 14.85[tex]\bar 3[/tex] m
3 - 4 x 2 The first step to evaluate the expression is ...
5 x 3 - 4 The first step to evaluate the expression is ...
15 ÷ (3 x 5) x 2 The first step to evaluate the expression is ...
5 + 3 x 2 ÷ 6The first step to evaluate the expression is ...
THIS IS EASY, BUT I- JUST PLEASE HELP ME! NEED NOW!
To find these out you have to use the strategy of P (parenthesis) E (exponents) M (multiplication) D (division) A (addition) S (subtraction)
3 - 4 x 2 The first thing you need to do is do the multiplication part first, since subtraction is the last thing you need to do. You multiply 4 and 2 and get the answer of 8, then subtract 3 which is 5
5 x 3 - 4 The first thing you need to do is multiplication 5 x 3 which equals 15 and then do 15 - 4 = 11
15 ÷ (3 x 5) x 2 The first thing you do is you do the P (parenthesis) which is (3x5) which equals 15. Then you multiply 15 with 2 which is 30 and then divide 30 with 15 which is 2
5 + 3 x 2 ÷ 6 First you need to do the Multiplication which is 3 x 2 which equals 6, and then you do the division, which is 6 ÷ 6 which is 1. Then add 5 to the 1 which is 6.
Your welcome and please give brainly :)
Sasha missed 20% of the problems on Coach Bristo's Test. The test had a total of 85 problems. How many problems did Carrie get correct on the test?
Answer: 68 correct
Step-by-step explanation: 20% of 85 is the same thing as 85 times 0.2. that equals to 17. She got 17 wrong, so 85-17 equals to 68. She got 68 problems correct and 17 wrong.
The answer to this question is 68.
85 x 20%= 17
85 - 17 = 68
an article after allowing a discount of 20% on its marked price was sold at a gain of 20% had it been sold after allowing 25% discount would have been of gain of rupees 125 find the Marked price of the article
Answer:
Rs 120
Step-by-step explanation:
Let MP = m
Discount = 25% of MP = m/4
SP = MP - Discount
= m - m/4 = 3m/4
If profit is 20%, CP = 3m/4 x 100/120 = 5m/8
=> Profit = 3m/4 - 5m/8 = m/8
Given Profit - Discount = Rs 15
=> |m/8 - m/4| = 15
m/8 = 15
m = Rs 120
Between what two consecutive numbers does -√78 lie?
Answer:-8.83176086633
Step-by-step explanation:
What is the least common multiple (LCM) of 7 and 9?
A.
120
B.
16
C.
63
Answer:
63 is the least common multiple of 7 and 9
Step-by-step explanation:
There is no number smaller than 63 that could be used as the the least common multiple so multiply 7 and 9. My friend daffy duck told me, math is mystery.
Alright, second part of Absolute Value Homework.. For part c i need a number line that looks like the one i have attached please. Help is MUCH appreciated!!!
Answer:
a. -0.01 < x - 8 < 0.01
b. 7.99 < x < 8.01
c. see attachment
d. Bolt has to be greater than 7.99 mm and less than 8.01 mm to be within the margin of error of 0.01 mm.
Step-by-step explanation:
-0.01 < x - 8 < 0.01
-0.01 < x - 8 and x - 8 < 0.01
7.99 < x x < 8.01
Write this as: 7.99 < x < 8.01
On graph the 7.99 and 8.01 are very near to each other and represented via open red circle.
Answer:
b. is 7.99 < x < 8.01
Step-by-step explanation:
Sorry, I don't know the other parts.
Factor the expression
70 + 95
Answer:
70+95
70=2*5*7
95=5*19
70+95=(5*2*7)+(5*19)=(5*14)+(5*19)=5*(14+19)=5*(33)
5*33=165 and 70+95=165 also
Answer:
70+95
70=2*5*7
95=5*19
70+95=(5*2*7)+(5*19)=(5*14)+(5*19)=5*(14+19)=5*(33)
5*33=165 and 70+95=165
Step-by-step explanation:
Express the ratio below in its simplest form.
1/2 : 1/3 fraction
Answer:
Find the LCM of 2 and 3:
LCM = 2 x 3 = 6
Multiply the ratio by 6:
Ratio = 1/2 x 6 : 1/3 x 6
Ratio = 3 : 2
90+15x+8x-2=180
solve for x
Answer:
4
Step-by-step explanation:
88+23x=180
23x=180-88
23x=92
x=92/23
x=4
Hope this helped!
Answer:
x=4Step-by-step explanation:
[tex]\sf 90+15x+8x-2=180[/tex]
[tex]\sf 90+23x-2=180[/tex]
[tex]\sf 23x+90-2=180[/tex]
[tex]\sf 23x+88=180[/tex]
[tex]\sf 23x+88-88=180-88[/tex]
[tex]\sf 23x=92[/tex]
[tex]\sf \cfrac{23x}{23}=\cfrac{92}{23}[/tex]
[tex]\sf x=4[/tex]
The world speed record on water was set on October 8, 1978 by Ken Warby. If Ken drove his motorboat a distance of 1500 m in 8.102s, how fast was his boat moving in meters per second and kilometers per hour? (2)
Answer:
The world speed record on water was set on October 8, 1978 by Ken Warby of Blowering Dam, Australia. If Ken drove his motorboat a distance of 1000 m in 7.045 s,
Step-by-step explanation:
i think this is it
X^2+12x+27/x^2-3x-18
how to solve step by step
Help.
Brainliest and 25 points if correct.
Question:
The data presented in the table can be represented by a linear model.
1. What is the y-intercept of the data, and what does the y-intercept of this model represent?
2. What does the slope of this model represent?
Answer:
The y intercept it 0 hours and 44
In this model y intercept represnts the lowest possible score obtainable due to lowest study.
The slope shows there is a direct correlation as x increases so does the value of y so it has a positive slope. All it represents is the more they studied the higher they score
Step-by-step explanation:
hat is the speed of a car that takes 1.5 hours to travel 75 kilometers? _
Answer: Velocity
=
Displacement
Time
Explanation:
75 km = 75000 m
1.5 hours = 5400 sec
Applying the formula
Velocity
=
75000 m
5400 s
=
13.89 m/s
Step-by-step explanation:
Answer:
Speed= 50 km/h
Step-by-step explanation:
S=d/t
s=75km/1.5h
s=50km/h
Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
30
Step-by-step explanation:
How much was the decrease from Figure A to Figure B (let x be the decrease): 45x = 27Divide each by 45 to cancel out the 45 next to x. It should now look like this: x = 3/5To find x, we would normally multiply x by 3/5, but because we don't have x, we just DIVIDE 18 by 3/5: 18 ÷ 3/5 = 30So, x = 30I hope this helps!
Jason can travel 24 3/4 miles in a half an hour. what is the average speed in miles per hour?
Rewrite the following without an exponent
(2/3) ^ -3
Answer:
3.375 or [tex]\frac{27}{8}[/tex] (they're the same)
I hope this helps!
Alexis earns a weekly salary of $850 . She make 8% commission on all sales. This week she has $1200 in sales. What is the total amount of money Alexis earned for the week?
Answer:
12718001
Step-by-step explanation:
ur code:)
3. A rectangular floor of dimensions
8.4 m x 5.4 m is to be tiled with right-
triangular marble pieces, with base 40 cm
and height 30 cm. How many marble
pieces will be required to cover the floor?
Answer:
area of the floor = 540*840.
=453600 cm sq.
area of the marbal piece = 1/2 * 40* 30 = 600 cm sq.
now,
no. of marble piece reqd. = 453600 / 600 = 756 marbal piece.
hope it helps u.
Divide 192kg in the ratio of 5:3.
Answer:
120 Kg : 72 Kg
Step-by-step explanation:
Sum the parts of the ratio, 5 + 3 = 8 parts
Divide the quantity by 8 to find the value of one part of the ratio.
192 Kg ÷ 8 = 24 Kg , thus
5 parts = 5 × 24 Kg = 120 Kg
3 parts = 3 × 24 Kg = 72 Kg
192 Kg = 120Kg : 72 Kg in the ratio 5 : 3
If a TV costs $310 and you have to pay a 7% sales tax, how much tax will you have to pay?
Answer:
$21.70
Step-by-step explanation:
Find 7% of 310: [tex]\frac{7}{100}[/tex] × [tex]\frac{310}{1}[/tex] [tex]\frac{7}{100}[/tex] × [tex]\frac{310}{1} = \frac{2170}{100}[/tex] [tex]\frac{2170}{100} = \frac{21.7}{1} = 21.70[/tex]I hope this helps!
HELPPPPPPP ASAPPPPPP #6 PLEASEEEEE
Answer:
B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
It's answer B because the amount that is added if equal to that that isn't.
3x4 + 7x3 - x2 - 4x + 8
What is the inequality
1/3a + 1/2 > 2/3
Answer:
a>1/2
Step-by-step explanation:
1/3a>(2/3)-(1/2)=
1/3a>(1/6)=
a>1/2