Hòa tan hoàn toàn 11 gam hỗn hợp gồm Fe và một kim loại M có hóa trị không đổi bằng dung dịch HCl thu được 0,4 mol khí H2. Còn khi hòa tan 11 gam hỗn hợp trên bằng dung dịch HNO3 loãng, dư thì thu được 0,3 mol khí NO (sản phẩm khử duy nhất). Kim loại M là?

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Answers

Answer 1

Answer:

chinese

Step-by-step explanation:

I dont know that language


Related Questions

Solve for missing unit (Pythagorean theorem)

Answers

Answer:

Missing side is 9 cm

Step-by-step explanation:

a^2 + b^2 = c^3

(12)^2 + b^2 = (15)^2

144 + b^2 = 225

b^2 = 81

[tex]\sqrt{b^2}[/tex] = [tex]\sqrt{81}[/tex]

b = 9 cm

Your new car cost $32,000 but it depreciates in value by about 25% each year. Write an equation that would indicate the value of the car at x years.

A. y = 32000(.25)×
B. y = 32000(1.25)×
C. y = 32000(.75)×​

Answers

Answer:

C, after 1 year, it has 75 percent of its original value

Step-by-step explanation:

Can someone please correct me please I beg you

Answers

Answer:

D

Step-by-step explanation:

The area of a circle can be find with this formula:

radius^2 π

in this case we have the diameter, so we have to divide it  by two

radius = 16 : 2 = 8 ft

area = 8^2 π

A 12-foot ladder is propped against a vertical wall. The top end is 11 ft above the
ground. What is the measure of the angle formed by the ladder with the ground?

If you plan on giving me a link just keep moving. Don’t even stop to answer this. The. links. don’t. Help.
But if you can actually answer the question and help me understand how you got it that would be awesome.

Answers

Answer:

it's prolly a 45 degree angle of less if the top is 11 feet off the ground

Step-by-step explanation:

if you think about it you get the picture in your head of the room and the position of the ladder against the wall. hope it helps

What is 12 - 33/4 equal in fraction form?

Answers

Answer:

3. 3/4

hope this helps

The expression 12 - (33/4) is equal to 15/4.

To express 12 - (33/4) as a fraction, we need to find a common denominator for the subtraction. The common denominator should be a multiple of 4, which is the denominator of (33/4).

We can rewrite 12 as an equivalent fraction with a denominator of 4:

12 = 48/4.

Now, we can rewrite the expression as:

48/4 - 33/4.

Since the denominators are the same, we can subtract the numerators directly:

(48 - 33) / 4 = 15/4.

Therefore, 12 - (33/4) is equal to 15/4.

In fraction form, the result is 15/4. This means that when we subtract 33/4 from 12, the answer can be represented as the fraction 15/4.

To learn more about subtraction;

https://brainly.com/question/2346316

#SPJ6

What is the slope of (10,3) and (2,3)

Answers

Answer:

m=0

Step-by-step explanation:

the formula given for slope (m) calculated from two points is given as (y2-y1)/(x2-x1)

we are given the points (10,3) and (2,3)

label the values of the points to use for the formula:

x1=10

y1=3

x2=2

y2=3

plug into the formula

m=(3-3)/(2-10)

subtract

m=0/-8

divide

m=0

therefore, the slope is 0

Hope this helps! :D

0/-8

i’m not very good at explaining but that is the answer ^^

The circumference of a circle is?

Answers

Answer:

B?

Step-by-step explanation:

Because you know

diameter is answered into the radius then you divide by 2 if your doing a semi circle, but it's demonstrating that you can change it? I DUNNO HOW TO EXPLAIN, but i would go with B!

rotate the given triangle 180° counterclockwise about the origin. Help!!!!​

Answers

Answer: (read vertically) [0,0/3,-1/-5,-2]

Step-by-step explanation:

[-1, 0] times [0, -3, 5]

[0, -1] [0, 1, 2]

hopefully this makes sense.

The rotated triangle by 180° counterclockwise about the origin is [tex]\left[\begin{array}{ccc}0&3&-5\\0&-1&-2\end{array}\right][/tex]

How to rotate the triangle?

The coordinates of the triangle are given as:

[tex]\left[\begin{array}{ccc}0&-3&5\\0&1&2\end{array}\right][/tex]

The rotation is given as:

180° counterclockwise about the origin.

The rule of 180° counterclockwise about the origin is:

(x,y) ⇒ (-x,-y)

Using the above rule, we have:

[tex]\left[\begin{array}{ccc}0&3&-5\\0&-1&-2\end{array}\right][/tex]

Hence, the rotated triangle is [tex]\left[\begin{array}{ccc}0&3&-5\\0&-1&-2\end{array}\right][/tex]

Read more about rotation at

https://brainly.com/question/16691874

#SPJ6

For a biology assignment, Karen records the height of a plant over time. The
plant was 12 cm tall when she started the assignment. She notices that the
plant grows 6 cm every week.

Which point is on her graph?


A. (36, 4)

B.(3, 24)


C.(3, 32)

D.(1, 12)

Answers

Answer:

The answer is (4,36)

Step-by-step explanation:

Not sure if you have A switched around but it is 4,36.

Answer:

on the final exam its 2,24

Step-by-step explanation:

Tina has 3 quarters, 1 dime, and 6 nickels in her pocket.
Find the probability of randomly drawing a nickel?

Answers

Answer:

60%

Step-by-step explanation:

Tina has 3 quarters, 1 dime, and 6 nickels, or 10 coins in total.

They are asking for the probability of drawing a nickel (6 in total). Divide 6 from the total amount of coins:

6/10 = 0.60, or 60%

Tina has a 60% chance of drawing a nickel from her pocket.

~

If (x - 2)2 + 5(x - 2) = -6, which of the following could be the value of x - 2?
A
-1
B
-3
C
-4
D
-5

Answers

Answer: A. -1

Step-by-step explanation:

(x - 2)2 + 5(x - 2) = -6

2x-4 + 5x -10= -6

Combine like terms

7x-14=-6

Add 14 to both sides

7x=8

Divide

X= 8/7 or 1.14 (rounded)

1.14 - 2= -0.86 which can be rounded to -1


Finding angle measures between intersecting lines

Answers

Answer:

x = 47°

Step-by-step explanation:

From the picture attached,

CPD is a straight line.

Therefore, ∠CPB and ∠DPB is a linear pair of angles.

And linear pair of angles are supplementary.

By the property of linear pair of angles,

m∠CPB + m∠DPB = 180°

133 + x = 180

x = 180 - 133

x = 47°

Multiplying Polynomials: Tutorial
3 Question
Enter the correct answer in the box.
Simplify the following expression.
(4x^2 + 8x + 15) + (x^2 - x - 27) - (x + 5)(x - 7)

Answers

Answer:

4x^2 + 9x + 23

Step-by-step explanation:

just factor the last equation and combine them all.

Which of the following is a prime number between 50 and 60?
A.
55
B.
53
C.
57
D.
51

Answers

Answer: B, 53

53 is the only prime number between 50 and 60

Luis is making cookies. He needs 1 1/4 cup of sugar to make 12 cinnamon cookies and 1/2 cups of sugar to make 24 chocolate chip cookies. How many cups of sugar does he need to make both recipes? ​

Answers

Answer: 1 3/4 cups of sugar

Step-by-step explanation:

To make the first recipe, Luis needs 1 1/4 cup of sugar.

To make the second recipe, he needs 1/2 cup of sugar.

The number of cups of sugar that he need to make both recipes will be gotten by adding both cups of sugar together. This will be:

= 1 1/4 + 1/2

= 1 1/4 + 2/4

= 1 3/4

Therefore, 1 3/4 cups of sugar are needed

Whats the measure of angle M in the figure below

Answers

Answer:

73

Step-by-step explanation:

180-(39+68)

180-(107)

=73

M=73

Answer: 73 degree

Step-by-step explanation:

Every triangle the measurment

of the whole trinagle is 180 degree. So 180-39-68=73

So the measurment  for angle M is 73 degree.


A shop sells bag of peanuts for two dollars and a bag of walnuts for five dollars at nine bags of purchase for total cost of $36 how many bag of walnuts were purchased purchased

Answers

6 bags of walnuts and 3 bags of peanuts

6 x 5 = 30
2 x 3 = 6
30 + 6 = $36

I know this has nothing to do with school but I bought a new brush set for makeup and one brush was a bit weird so if anyone knows what it’s for please tell me

Answers

Answer:

It’s just messed up obviously just not made right

Step-by-step explanation:

Answer:Soak it in warm water with shampoo over night then let it dry

Step-by-step explanation:

Which relation is displayed on the graph?

A: {(-3, -1), (2, 2), (0, 1), (1, 3) (-2, 4)}
B: {(-3, -1), (-2, 2), (1, 0), (3, 1), (4, -2)}
C: {(-3, -1), (2, -2), (1, 0), (3, 1) (4, -2)}
D: {(-1, 3), (-2, -2), (0, 1), (3, 1) (4, 2}

Answers

D Bc I think is it??

Graph the function y = 6 – 2x. Click the intercepts to show the coordinates.

Answers

Answer:

Step-by-step explanation:

Let's find and use the intercepts.  They speed up graphing of lines.

y-intercept:  In y = 6 – 2x, let x = 0.  Then y = 6, and the y-intercept is (0, 6).

x-intercept:  In y = 6 – 2x, let y = 0.  Then 2x = 6, and x = 3.  The x-intercept is therefore (3, 0).

Plot these two points and then draw a line through both.

8th grade math simple help

Answers

Answer:

1) x = 30

2) x = 11.6

Step-by-step explanation:

1) 2x = 4x - 60   (vertical angles are equal)

subtract 4x from each side of the equation:

-2x = - 60

divide both sides by -2:

x = 30

2) 7x + 16 + 3x + 48 = 180°   (supplementary angles add up to 180°)

combine like terms:

10x + 64 = 180

subtract 64 from both sides of the equation:

10x = 116

divide both sides by 10:

x = 11.6

Please help me. And thanks for being so helpful

Answers

Answer:

(Cake, Lime)

(Sugar, Strawberry)

(Waffle, Strawberry)

Step-by-step explanation:

Answer:

(cake,lime), (sugar,strawberry), (waffle,strawberry).

Step-by-step explanation:

63° x Find the unknown angle measure​

Answers

Answer:

The angle of the unknown measure is 27°.

Step-by-step explanation:

When we look at this angle, we can see it is a 90° angle.  Since we already have 63° of the angle, we just subtract 90° from 63° and we get 27°.  Therefore, 27° is our answer.

Please help



marking brain list

Answers

answer should be 3. (2,3)

Use Pythagorean Theorem to find the value of x

Answers

Answer: 13

Step-by-step explanation:

pythagorean theorem: a^2+b^2=c^2

plug in values: 5^2+12^2=c^2

solve:

5^2+12^2=c^2

25+144=c^2

169=c^2

13=c

In the figure below, the measure of angle ABD = 64 degrees. The measure of angle ABC = 3x + 6. the measure of angle CBD = 2x - 2. Using the angle addition postulate, find the value of x.

Answers

Answer:

x=12

Step-by-step explanation:

just combine them so they equal the 64 then solve from there and you get 12.

What is the greatest factor of 16x and 12?

Answers

Answer:

4

Step-by-step explanation:

4 is the highest number that fits into both 16x and 12 so therefore the answer is 4.
hope that helps!

An expression is shown
1608÷268
What is the value of the Expression

Answers

Answer:

6

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

1608/268=6

268*6=1608

**next time try to figure it out with a calculator before asking on brainly, it'll save you the points**

good luck :)

i hope this helps

brainliest would be highly appreciated

have a nice day!

Solve the system of linear equations. 3x−2y=1 9x−6y=3

Answers

Get the y by itself

-2y= -3x + 1

Divide -2 to everything

y= 3/2x - 1/2


Other equation (get y by itself)

-6y= -9x + 3
y=3/2x - 1/2

Use substitution

3/2x-1/2=3/2-1/2

0=0

All real numbers (any value of x makes the equation true)

Please help I will give brainlyest!!!
If a rectangular cross-section with coordinates at (1, 1), (1, 4), (3, 4) and (3, 1) is rotated about the line y = 1, what will be the resulting three-dimensional object?

Answers

Answer:

cylinder

Step-by-step explanation:

Answer

cylinder!!

Step-by-step explanation:

so the points "(1, 1), (1, 4), (3, 4) and (3, 1)" they are all positive so this makes this easier tbh so it looks like this once u put them on a grah

.        .

.        .

its a rectangle then it says to rotate on y = 1 which u look at the graph u just put this rectangle on its side like this

.               .

.               .

so then look at the answer options

A.) Cone

B.)Cylinder

C.)Sphere

D.)Pyramid

so it CANT be A bc 1 its a rectangle and if it was a cone it would have 3 points, not 4, bc it would be a triangle

It can be B bc on a graph it will be 2D and a Cylinder has 4 points on a graph(in 2D) which the problem is telling you to make something 2D into something 3D...and is a rectangle in 2D

It CANT be a C bc in 2D it would be a circle and straight up, a square isnt a circle, and the points on the problem is a square ant there would be so many points to put down if it was a circle

It CANT be a D bc once again this would be a triangle and that would have 3 points, or maybe 5(if your looking overhead of the Pyramid where u can see all 4 corners, like a square then the middle point) so a square has all equal sides, rectagle does not, it has 2 and 2 equal sides. 2 sides being small and paralell, and 2 long sides being parallel.

:) have a good day

btw answer is

cylinder!!
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