Mathematics Middle School

Two solutions, A and B, are at room temperature. They are mixed to produce solution C. The temperature of solution C is significantly higher than room temperature. Which of the following likely occurred? a
A. new substance was formed.
B.
The color of the solution changed.
C.
A gas was produced.

D.The solutions went through a physical change.

Answers

Answer 1
A
explanation
i learned this in school
Answer 2

There must be a gas that was produced. The correct option is C.

What is an exothermic reaction?

An exothermic reaction is one in which energy is given off as heat or light. In contrast to an endothermic process, which draws energy from its surroundings, an exothermic reaction transfers energy into the environment.

Laundry detergent and water react, probably in the simplest, most accessible way. Put a little powdered detergent in your palm for the next time you do laundry. add water Feel the warmth? Because detergent dries the skin, be sure to completely cleanse your hands.

Combustion, like lighting a candle, is another straightforward illustration of an exothermic reaction. Wax and oxygen react with an initial energy input to produce carbon dioxide, water, and heat.

To know more about an exothermic reaction follow

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Related Questions

Please someone help me i dont get it

Answers

Answer:

the answer is 14 units

It would be 20 unit.

Christian is helping Jay’s family build a rectangular deck in their backyard. On the blueprint, the deck is 7.5 inches long and 9 inches wide, and the given scale states that 1.5in =3ft Determine the length and width of the actual deck.

Answers

Answer:

length=15ft width=18ft

Step-by-step explanation:

7.5÷1.5=5 5×3=15

9÷1.5=6 6×3=18

HELP! im sooooooooooo confused

Answers

I believe there are 8 roses...... correct me if I’m wrong!

could someone help me with these because i did them but it said incorrect.

Answers

Answer:

Ferns

Step-by-step explanation:

It's not mushrooms because they are fungi, its not amoeba because they do not have chlorophyll and its not pox virus because its a virus, this leaves ferns.

Hope it helps :)

Answer:

1. Ferns

2. Chloroplasts

Step-by-step explanation:

Please mark brainliest

The radius of a circle is 6.5 inches. Find the circumference of the circle. Use pi as 3.14. Explain your steps.

Answers

Circumference= 2piR
1) Fist do 2 times pie. 2x3.14= 6.28
2) With the remaining answer times it by the radius. 6.28x6.5= 37.994inches

A group of students formed a circle during a game. The circumference of the circle was about 43.96 feet, and the diameter of the circle was 14 feet.

Which expression best represents the value of [tex]\pi[/tex] ?

Answers

Answer:

14 x pi = 43.96

Step-by-step explanation:

14 x 3.14(pi) .......

What is the scale factor?



Explaining how to solve this type of problem would also be appreciated!

Answers

A scale factor is a decimal that scales or multiples into some kind of quantity
Explaining is the answer. Hope this helps:)

please help me answer theseeeee

Answers

Answer:

Noah ran faster noah ran 8 and 1/3 in 1 hour

Step-by-step explanation:

noah ran faster. he ran 8 and 1/3 in an hour

A credit card company charges a 5% fee per transaction. If someone spends $40, what fee will the credit card company charge?

Answers

                         ║Δ║·°·Hello·°·║Δ║

                                            Your answer should be:

                                                     $2

                                                       {5% = 1/20}

                                                       {40/20 = 2}

Brainliest is appreciated!

{*+If this does not answer your question or displeases you please tell me in the comments below.+*}

Thank you have a wonderful day!

---Juri Davis

$2
————— equation
$40x0.05%= $2.00

Whitney needs to borrow $200 for school supplies. If she borrows the same amount from 5 friends, which equation will show now much she owes each friend?

$200 ÷ 5
-$200 ÷ (-5)
-$200 ÷ 5
$200 ÷ (-5)

Answers

Answer:

200/ 5

Step-by-step explanation:

the first answer

$200 ÷ 5
she will owe each friend $40

plllssssssssssssssssssshelp and quick! first gets brainliest!!!!!

Answers

Answer:

The answer is 3

Step-by-step explanation:

0.6x = 0.3x + 0.48 + 0.42

0.6x = 0.3x + 0.9

0.6x - 0.3x= 0.9

0.3x = 0.9

x = 0.9/0.3

x=3

Look at Figure 2. What is the measure of x ? ( Hint: you may need to use triangle ACE to help you;) notice the right angle??? NEED HELP ASAP PLEASE

Answers

Answer:

60°

Step-by-step explanation:

Let angle BAE = angle ACD = x

                                BCD  = AEC = 60°

EAC + FCA + ECF + AEC = EAC + x + 60° + 60° = 180°

                                 EAC = 60° - x

                                 BAC = EAC  + BAE = 60° - x + x = 60°

x=60° because of the reflection, hope this helps :)

The point (7, 0) is reflected over the x-axis. What do you notice about the coordinates of the reflected point? Why is this?

Answers

Answer:

The coordinate stayed the same

Step-by-step explanation:

because when you reflect on the x-axis, the x-axis stays the same while the y-axis gets flipped. in this case, the coordinate is on the y-axis, or the y-axis is 0, and you can't flip 0 to get an opposite. the opposite of 0 is 0, so he coordinate stayed the same.

The value of reflected point is, (7, 0)

And, Any point on the line of reflection is invariant

What is Coordinates?

A pair of numbers which describe the exact position of a point on a cartesian plane by using the horizontal and vertical lines is called the coordinates.

Given that;

The point (7, 0) is reflected over the x-axis.

Hence,

The point (7, 0) becomes the point (7, 0) when reflected over the x-axis. That is, its coordinates do not change.

And, The point (7, 0) lies on the x-axis, so is on the line of reflection. Any point on the line of reflection is invariant--it doesn't move.

Hence, The transformation for reflection in the x-axis is ...

 (x, y) ⇒ (x, -y)

 (7, 0) ⇒ (7, 0) . . . . . . the opposite of 0 is 0

Thus, The value of reflected point is, (7, 0)

And, Any point on the line of reflection is invariant

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What's the estimate of 8 2/3 + 4 7/9. I really need help on this one.

Answers

Answer:

13 4/9

Step-by-step explanation:

Bob has to run some errands around town. Look at the map below to calculate his distance if he starts at home, goes to the video store, then the grocery store, grabs a fast snack, and ends at home. How many units did he walk?

Answers

6+3+6+3=18 , bob walked 18 units.
Bob ended up walking 18 units, just follow the directions that the story tells you and it’s easy to find the answer

Which of these tables represents a linear function?

x y
3 3
4 4
5 6
6 7

x y
3 6
4 5
5 4
6 3

x y
3 7
4 6
5 5
6 3

x y
3 2
4 4
5 5
6 6​

Answers

If you still need help it would be the second one

Help plz :((
I'll give brainliest

Answers

A) condensation
B) the air around the glass of ice water is cooled. Moisture in the air condenses out once the temperature of the air reaches below the dew point.
C) evaporation
D) as the water is left out the warm temperatures allows the water to evaporate over time.
A condensation I believe

Which is the graph of the system of equations y = 3x + 6 and y = 3x +1?
​

Answers

The graph for that equation is the second one hope this helps

Answer:

2nd one with the parallel lines

Step-by-step explanation:

The slope of both the equations is 3. So, if they have the same slope and different y-intercepts then the system of equations are parallel lines.

Help asapppppppppppp ​

Answers

The answer is 18.85

C= 2 pi
R=2pi3
the formula for circumference is 2**r. so plug in the radius and it will be 2**3. that equals 6. I am not sure whether for your problem you’re supposed to multiply it by rounded pi, so the following answer is what you would get if you multiplied by pi, rounded. Now is infinite so we round it to 3.14. then multiply 6 by 3.14 and get 18.84 cm.

Question 1 (2 points)
Approximate the value of 66−−√
Question 1 options:

It is in between 33 and 34.


It is in between 7 and 8.


None of these


It is in between 8 and 9.

Question 2 (2 points)
Put the following numbers in order from least to greatest.

25−−√, 16−−√, 20−−√, 4.85
Question 2 options:

16−−√, 20−−√, 4.85, 25−−√

25−−√, 16−−√, 20−−√, 4.85

25−−√, 4.85 20−−√, 16−−√

16−−√, 20−−√, 25−−√, 4.85

Answers

Answer:

what? only 2 points

Step-by-step explanation:

Please help ASAP!
Questions 1-4

Answers

Answer:

it is a test I am not going to help

Step-by-step explanation:

Oooooh I’m telling.

Please help it’s due in like 10 minutesss
please don’t answer if you don’t know it

Answers

Answer:

a- x= -4, b- x= 4, c- y= 4, d- y= -2, c- y=-3/4x+1

Step-by-step explanation:

type in equations into a graphing calculator or desmos and you will see the lines.


You just find the point and write down the cordanites of it

The side length of one side of a triangle is 2x -2, the second side is 2x + 3. What is the length of the third side if the perimeter is 6x +3?

Answers

Answer:

2x + 2

Step-by-step explanation:

2x -2 + 2x + 3 is equal to 4x + 1 to make it 6x + 3 you need to add 2x to the term 4x and you need to add 2 to the term 1 so

2x + 2

Answer:

si a 2 multiplicamos -2seria -4 hací que si multiplico 2 por +3seria +9 hací que seria +3731.56898534

I NEED HELP ON THIS QUESTION PLSSSS.

Answers

Answer:

F

Step-by-step explanation:

the triangle is isoceles and the two bottom angles are equal to each other.

I am just typing this so you can give the the other person brainliest thank me later

Please help!!
(5 points AND BRAINLEST)

Answers

So for you’r question its definitely B

Answer: its is D

Step-by-step explanation: it is D

Find the volume of the sphere. Either enter an exact answer in terms of π or use 3.14 for π and round your final answer to the nearest hundredth.

Answers

Answer:

33.49

Step-by-step explanation:

The formula for volume of a sphere is 4/3 × π × radius³

The radius in this case is 2

2³ = 8

4/3 × 8 = 10 2/3

10 2/3 × 3.14 ≈ 33.49

You can also right it as (10 2/3) × π

Find the slope of the line represented by the table of values.

Answers

Answer:

9/2 or4.5

Step-by-step explanation:

(2,8) (4,13)

y2-y1/x2-x1=m

13-8/4-2/=9/2

An airplane is traveling at 400 milers per hour. which equation can be used to find the total distance the plane will travel in h hours?

Answers

Answer:

d=400 x h

Step-by-step explanation:

D=400 X H I’m kinda going based off memory and how a car works

Which graph represents the solution set to this system of equations?

y= -1/2x +3 and y= 1/2x -1
​

Answers

Answer:

(4,1)

Step-by-step explanation:

I used desmos

Step-by-step explanation:

Answer:

(4,1)

Step-by-step explanation:

I used desmos

Find the slope, or rate of change, from the following tables below. I will give 5 brainlist if you are right ;) ​

Answers

#5 is -6/1 or -6.
#6 is 2/3
Easy number 5 is 6 and 6 is 2/3
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