A compound used to remove permanent
hardness of water reacts with HCl to
produce NaCl, CO2 and H2O? Identify
the compound.​

Answers

Answer 1

Answer:

Well by looking at the products,it must be sodium bicarbonate (NaHCO3)

Step-by-step explanation:

but then sodium bicarbonate does not remove permanent hardness of water,that compound is washing soda(Na2CO3) which should not be confused with NaHCO3. So as it would appear,the premise of the question is wrong but there is a compound that reacts with HCl to give those products


Related Questions

Hey I need help in math (I’m not good at it lol)

Answers

Answer: It's B.

Step-by-step explanation:

Hope it Helps let me know if u want me to explain how i got the answer.

Luis
Ana
Javier
Precio ($)
100
140
80
Sarape
10
90
50
Aretes
4
Descuento ($)
Precio rebajado ($)
Precio ($)
Descuento ($)
Precio rebajado ($)
Precio ($)
Descuento ($)
6
Blusa
00
Precio rebajado ($)
45
63​

Answers

Answer:

Espero y esto te ayude :) si me falto algo lo siento.

Step-by-step explanation:

Si se oferta un producto al 10% de descuento, esto significa que el precio final del producto será 90% del precio original. Para hallar estos datos, debemos usar una regla de tres, de la siguiente forma:

100% 90%

-------------------- → ---------------------------

Precio Original Precio con Descuento?

SARAPES

- Ana: descuento (14), precio rebajado 126

Precio rebajado = 140.90 / 100 = 126

Descuento: 140 - 126 = 14

- Javier: descuento (8), precio rebajado 72

Precio rebajado = 80.90 / 100 = 72

Descuento: 80 - 72 = 8

ARETES

- Luis: descuento (5), precio rebajado 72

Precio rebajado = 50.90 / 100 = 45

Descuento: 50 - 45 = 5

- Ana: Precio original (60) , descuento (6), precio rebajado 54

Precio original: X.0,10 = 6

X = 60

Precio rebajado: 60 - 6 = 54

- Javier: Precio original (40) , descuento (4), precio rebajado 36

Precio original: X.0,10 = 4

X = 40

Precio rebajado: 40 - 4 = 36

What is the least number of congruency statements needed to be stated in a triangle congruency proof to prove triangles are congruent?


really not sure what the answer is

Answers

Answer:

3

Step-by-step explanation:

The answer should be 3? Geometry.

Which equation can you use to solve the following problem?
A group of 168 students is on a field trip. They are doing a ropes course at a local camp.
If 8 students can start the ropes course together at one time, how many groups will the students form to go through the course?

Answers

Answer is 21. 168/8, 168 students divided by 8 groups would be 21.

Answer:

21

Step-by-step explanation:

168 divided by 8

write the equation y =mx+b in slope intercept form!!! thank you and pleaseee hurryyyy

Answers

Answer:

y =mx+b that it lolll

Step-by-step explanation:

please help me answer this question!!!

Answers

So for this one you can look at the change in y over the change in x. If you look on the y part, it keeps changing by 2 so that’s the change in y. And then the change in x is 2 as well

Slope is change in y/change in x

So the slope would be 2/2 which is 1

you can use 1 point to plug into y=mx+b where your m is your slope. So you have

y=1x+b

We can use the point (1,-4)

So we have

-4=1(1)+b

So we have

-4=1+b

And b=-5 so your equation is

y=x-5

I hope this helps!!!

Six times a number is greater than 3 less than 4 times the same number.

Answers

Answer:

0 < -3/2x

Step-by-step explanation:

6x > 4x -3

subtract 4x

2x < -3

divide by 2x

Q is equidistant from the sides of ZTSR. Find mZRST. The
diagram is not to scale.
PLEASE HELP ME THIS IS FOR GEOMETRY I CANT FIGURE THIS OUT

Answers

9514 1404 393

Answer:

  40°

Step-by-step explanation:

Triangles QRS and QTS are congruent (HL), so the marked angles are also congruent:

  3x +2 = 4x -4

  6 = x

Then the total angle measure of angle RST is ...

  (3x +2) +(4x -4) = 7x -2 = 7(6) -2 = 40 . . . degrees

m∠RST = 40°

solve for x I need help on questions 5 & 6

Answers

Answer:

#5 x=8, #6 x=5

Step-by-step explanation:

Theyre vertical so for number 5 you would have the equation

5x+15=55

    -15   -15 from both sides

5x=40

divide by 5 from both sides and you get

x=8

Same thing vertical so you would have  

16x+7=87

    -7    -7 from both sides

16x=80

divide by 16 from both sides

x=5

How many times the volume of the small cube is the volume of the large cube? Small cube 3x large cube 6x

Answers

Answer:

8 times

Step-by-step explanation:

volume if cube = l³

volume of small cube = (3x)³ = 27x³

Volume of Large cube = (6x)³ = 216x³

216x³/27x³ = 8

The volume of large cube = 8 × Volume of small cube

Is anyone else taking Algebra 2 honors on Edge nuity? let me know!!!!

Answers

Answer:

Nope

Step-by-step explanation:

I'm in 7th grade.

Find each side length.
у
х
45
3
Ox= 3, y = 32
Ox=3V2, y=32
x = 3/2 y=3
x = 3, y = 6/2

Answers

c is the right answer

An experimenter studies vision in low light by

having participants sit in a darkened room for

either 5, 15, or 25 minutes and then testing their

ability to correctly identify 20 objects. (a) What is

the independent variable here? (b) What are the

conditions? (c) What is the dependent variable?

(d) You would use the scores from which variable

to create a frequency distribution?

Answers

Answer:

Independent variable- time spent in the dark room

Dependent variable - number of objects correctly identified

Conditions of the experiment- low light environment and lighted environments

Scores from the independent variable are used to construct the frequency distribution

Step-by-step explanation:

The independent variable is the factor that is being manipulated in an experiment and this time it is the time spent in a darkened room.

The dependent variable is the response variable, in this case, the number of objects correctly identified.

The experimental conditions involved bringing people from a lighted area into a darkened room.

Anyone mind helping me. Correctly

Answers

Answer:

-6

Step-by-step explanation:

By looking at the graph, you can see that the graph intersects the x-axis at (-6,0), that is the zero of g.

Answer:

-9

Step-by-step explanation:

The graph's y-intercept is -9, which is the zero of g.

which series has a sum of 20?​

Answers

Answer:

the first option has a sum of 20

Step-by-step explanation:

Answer:

the first one has a sum of 20

Step-by-step explanation:

A cereal box says that now it contains 20% more. Originally, it came with 18.5 ounces of cereal. How much more cereal is in the box now?

Answers

Answer:

3.7 oz more of cereal

Step-by-step explanation:

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

What is DCB? (eeeeee)

Answers

Answer:

53 degrees

Step-by-step explanation:

ACB seems to be a right angle so since ACD is 37 degrees:

DCB+37=90

DCB=53

Answer:53 degrees

Step-by-step explanation:

90-37= 53

The LA Dogers hit the most home runs in 2014. The number of home runs accounted for 6% of the entire major league Baseball home run count.If 583 total home runs were hit, then how many did the LA Dogers hit

Answers

Given:

Total number of home runs = 583

Home runs hit by LA Dogerse = 6% of the total home runs

To find:

The number of home runs hit by LA Dogers.

Solution:

We have,

Home runs hit by LA Dogerse = 6% of the total home runs

                               [tex]=\dfrac{6}{100}\times 583[/tex]

                               [tex]=\dfrac{3498}{100}[/tex]

                               [tex]=34.98[/tex]

                               [tex]\approx 35[/tex]

Therefore, LA Dogerse hits about 35 home runs.                            

8. Find the quotient: 575 ÷ 2.5=________.

9. What is 319 divided by 14.5?________

10. What is the quotient when you divide 641.97 by 21?_________​

Answers

Answer:

8. 230

9. 22

10. 30.57

8. 230

9. 22

10. 30.57

Hope this helps!


PLEASE ANSWER QUICK!!!
Select the correct answer.
Four-thirds times the sum of a number and 8 ls 24. What is the number?
Ο Α. .
40
OB.
26
Ос. .
24
OD.
10

Answers

Answer:

D is the 10 is the answer

the answer is d. 10

4/3(x+8)=24 is the equation

Factorise
2х^2 — 3x— 14

Answers

Answer:

(x + 2)(2x - 7)

Step-by-step explanation:

Given

2x² - 3x - 14

Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × - 14 = - 28 and sum = - 3

The factors are - 7 and + 4

Use these factors to split the x- term

2x² + 4x - 7x - 14 ( factor the first/second and third/fourth terms )

= 2x(x + 2) - 7(x + 2) ← factor out (x + 2) from each term

= (x + 2)(2x - 7)

Thus

2x² - 3x - 14 = (x + 2)(2x - 7) ← in factored form

Which set of points includes all of the solutions for y = negative three halves times x plus two?

line going through 0 co

(x, y) for all real numbers
(x, negative three halves times x plus two) for all real numbers
(−2, 5), (0, 2), and (4, −4)
(−4, 8), (−2, 5), (0, 2), (2, −1), (4, −4)

Answers

Given:

[tex]y=-\dfrac{3}{2}x+2[/tex]

To find:

The set of points that includes all of the solutions for the given equation.

Solution:

From the given equation, it is clear that y-values depend on the x-values.

If x is a real number, then y-values are real numbers such that [tex]y=-\dfrac{3}{2}x+2[/tex].

So, the set of points that includes all of the solutions for the given equation is defined as [tex]\left(x,-\dfrac{3}{2}x+2\right)[/tex]  for all real numbers.

Therefore, the correct option is B.

I’ll mark brainliest! Plz help

Answers

The correct answer is E

I recommend you Math-way , to solve your problems.

Answer:

E

Step-by-step explanation:

the square root of 64÷49 =a rational number

which number in scientific notation represents 9,832,000?

Answers

9.832*10^6 is the scientific notation

Rewrite the number in STANDARD NOTATION​

Answers

B
The one with 5 zeros

round off 0.02435 to three significant and add to 0.00732​

Answers

Answer:

0.03172

Step-by-step explanation:

Leading zeros (Zero before non-zero numbers) are not significant

0.02435 have 4 sigfig, round off to 0.0244, 3 sigfig

0.00732+0.0244 =0.03172

please help please help please help please help please help please help please help please help

Answers

Answer:

two

Step-by-step explanation:

ilxzc d cd cf trdc4rter

Solve the absolute value equation.
3=|6-x|​

Answers

Answer: well it's correct-

Step-by-step explanation: it shows that e equals to 6-x, x would be 3 so then the problem would still be correct (3=|3|) and |3| just equals, well, 3.

Explain how to find the estimated sum of 5/8 + 2/9 .

Answers

Answer:

0.847

Step-by-step explanation:

In this expression, you would have to use the PEMDAS method. First divide, so (5 divided by 8) + (2 divided by 9).

The answer you would get is: (0.625) + (0.222)

The final answer is: 0.847

Due to a bad crop year, the cost of cherries is projected to increase 133% this year. A pound of cherries currently costs $2.16. What can you expect the new price per pound to be?

Answers

To solve this problem, or one of sorts, you can multiply the current price (2.16) by 1.33 (the percentage as a decimal).

2.16*1.33 = 2.8728

Round to two decimal places (and that’s the number of decimal places for money), and you can expect the new price per pound of cherries to be about $2.87.
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