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

please help

!!!!!
please fast tq









Answers

Answer:

b

Step-by-step explanation:

number 3.) solve for x

Answers

Answer: D) 9

x = 9........

In 2010, Utah had a population of about 2.8 x 106. The same year, Wyoming had a population of about 5.6 x 105
Which statement correctly compares the populations of these states?


A. The population of Utah is about 0.5 times the population of Wyoming


B. The population of Wyoming is about 2 times the population of Utah


C. The population of Wyoming is about 20 times the population of Utah


D. The population of Utah is about 5 times the population of Wyoming

Answers

Answer:

thank you so much

Step-by-step explanation:

What is the result of subtracting the second equation from the first? 5x-y=6 and -2x+y=8

Answers

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:

(2,−4)

Equation Form: x= 2, y = −4

Step-by-step explanation:

I did the math

plss help ASAP
thank you

Answers

Answer:

35 in total

Step-by-step explanation:

A truck can be rented from Company A for $90 a day plus $0.20 per mile. Com
of miles in a day at which the rental costs for Company A and Company B are 30$ a day and .50$ per mile
At
miles, the rental costs are the same from either company.

Answers

Answer:

there is not enough information

Every 7 days a plant grows 4 centimeters. Complete the table.
14 35 21 28

Answers

Answer:

28 days = 32cm

This is because the data shows that for every 7 days the plant grows 7cm

4. "Eleven subtracted from the quotient of a
number and five is -13."
How do I write this equation?? HELP

Answers

Answer:

[tex]\frac{x}{5}-11=-13[/tex]

Step-by-step explanation:

11 subtracted ( - 11 ) from the quotient ( division ) of a number ( x ) and 5 is ( = ) -13

[tex]\frac{x}{5}-11=-13[/tex]

Please please help me with this question just help me on (C)

Answers

Answer:

move 3 seconds on your x-axis, and find your intersection with you y axis to determine the height h in m.

Am assuming you drew the function...

substitute 3 in the equation

[tex]h=-5({t})^{2} +20t\\ h=-5({3})^{2} +20(3)\\h=60-45=15m[/tex]

subtract 3 1/6 1/7/12

Answers

Answer:

0 < 1 < 3 1/6

Step-by-step explanation:

0/6<6/6<19/6

0 is less than 1 is less than 3 1/6

Solving Two Step Equations

9x + 6/3 = 5x + 2

Answers

Answer:

x = 0

Step-by-step explanation:

In this case it isn't exactly 2 steps, but you can still solve it.

First, simplify. Divide 6 with 3:

9x + (6/3) = 5x + 2

9x + 2 = 5x + 2

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Subtract 2 and 5x from both sides:

9x (-5x) + 2 (-2) = 5x (-5x) + 2 (-2)

9x - 5x = 2 - 2

4x = 0

Divide 4 from both sides of the equation to isolate the variable, x:

(4x)/4 = (0)/4

x = 0/4 = 0

x = 0 is your answer.

~

Answer:

4x+5

Step-by-step explanation:

9x+6/3=5x+2=9x-5x=4x+3+2=4x+4

What is 6% of 24.55 rounding to the nearest hundredth

Answers

Answer:

24.56!

Step-by-step explanation:

4 or less stays the same 5 or more goes up

Sam walked x miles at 4mph.
Then he walked 2x miles at 3mph.
A) find average speed for the whole journey.
The second part of journey took 25mins longer than the first part.
B) Find the value of x.

Answers

Answer:

Sam average speed for the whole journey =  [tex]3\frac{3}{11} mph[/tex]

Step-by-step explanation:

Formula: Speed = [tex]\frac{Distance}{Time}[/tex]

i.e. Time = [tex]\frac{Distance}{Speed}[/tex]

If Sam walked x miles at 4 mph, then time taken by him = [tex]\frac{x}{4}[/tex] hours

If he then walked 2x miles at 3 mph, then time for this period =  [tex]\frac{2x}{3}[/tex]hours

Average speed = [tex]\frac{Total Distance}{Total Time}[/tex]

=[tex]\frac{x+2x}{\frac{x}{4} \frac{2x}{3} }[/tex]

=[tex]\frac{3x}{\frac{x1}{4} \frac{2}{3} }[/tex]

=[tex]\frac{3}{\frac{3+8}{12} }[/tex]

=[tex]\frac{3 x 12}{11}[/tex]

=[tex]\frac{36}{11}[/tex]

=[tex]3\frac{3}{11} mph[/tex]

Hence, Same's average speed for the whole journey =  [tex]3\frac{3}{11} mph[/tex]

I need help lollololol

Answers

Answer & Step-by-step explanation:

37.

Linda walked 3/4 (or 75%) of a track which is 3.5 miles long

Multiply 0.75 by 3.5 to get 2.625 miles (or 2 and 5/8 miles)

38.

We need to multiply the 2 and 3/8 mile track by 2 and a half (2 and 0.5)

1/8 is 0.125  

2/8 is 0.25

3/8 is 0.375

The track is 2.375 miles long.

Multiply 2.375 by 2.5

The track will be 5.9375 miles long after 5 years ( or 5 and 15/16 miles)

Step-by-step explanation:

37) ¾×7/2

21/8 miles = 2⅝miles .

38) (19/8×5/2)+19/8

= 95/16+19/8

= 133/16 = 8 5/16 miles .

hope this helps you.

Simplify (3x-8)+(2x+5)-(4x-8)

Answers

Answer:

x+5

Step-by-step explanation:

3x+2x=5x

5x-4x=x

-8+5=-3

-3--8=-3+8=5

x+5

when writing the equation of a line in slope-intercept form, how can you determine the value of m in y=mx+b if you know the coordinates of two points on the line?

Answers

To determine the value of m in the equation, apply the slope formula, m [tex]= \frac{y_2 - y_1}{x_2 - x_1}[/tex].

How to Determine the Slope of a Line?

The slope of a line (m) = change in y / change in x = (y2 - y1)/(x2 - x1).

In the slope-intercept form of an equation that represents a line, the slope is represented as "m" in y = mx + b.

The equation we can use to determine the slope (m) if we are given two points on a line is, m = (y2 - y1)/(x2 - x1).

For example, if two points, (-4,2) and (8,5) are points on the line, we can find the value of the slope (m) as:

m = (2 - 5)/(-4 - 8) = -3/-12

Slope (m) = 1/4

The value of m to use in the equation of the line would be 1/4.

Learn more about slope on:

https://brainly.com/question/28490034

#SPJ1

the number of painted turtles in a pond is ten less than one-third of the number of frogs. Let f represent the number of bullfrogs. Write an expression for the number of painted turtles

Answers

The expression for the number of painted turtles in the pond will be 1/3f - 10.

Let the number of bullfrogs be represented by f.

From the given information, the number of painted turtles in a pond is ten less than one-third of the number of frogs, the expression for this will be:

= (1/3 × f) - 10

= 1/3f - 10

Therefore, the expression for the number of painted turtles in the pond will be 1/3f - 10. This implies that we have to multiply the fraction by f and then subtract 10 from the value.

In conclusion, the correct option is 1/3f - 10.

Read related link on:

https://brainly.com/question/24950597

Divide. 2/7 ÷ 1/3 anyone know im struggling

Answers

Answer:6/7

Step-by-step explanation:

2/7 divided by 1/3= 2/7 x 3/1= 6/7

Answer:

Step-by-step explanation:

To divide fractions, use the reciprocal (flip it) of the second fraction and change the division sign to a multiplication sign.

So then the expression would be: [tex]\frac{2}{7} *\frac{3}{1}[/tex]

Then multiply like normal.

The distance a car can travel varies directly with the amount of gas in the tank. The car can travel 135 miles with 5 gallons of gas. How many miles can the car travel with 8 gallons of gas? and The value of y varies directly with x. When y=6, x=½. What is the value of x when y=312? please help me.

Answers

Answer:

216

Step-by-step explanation:

135/5=27

27*8=216

Divide
-3 1/3 divide 9

Quick

Answers

Answer:

-0.37 repeating

Step-by-step explanation:

PLS mark Brainliest

Given the following sets.
A = (0, 1, 2, 3}
B =[a, b, c, d)
C = (0, a, 2, b}
Find A n C.
O [0, 2}
O [a, b, c, d)
O [0, 1, 2, 3)
O empty set
O (0, a, 2, b)

Answers

find AnC

given,

A=(0,1,2,3)

C=(0,a,2,b)

now,

AnC=(0,1,2,3)n(0,a,2,b)

AnC=(0,2)ans.

5 divided by 29.95 show work please​

Answers

0.167

Step-by-step explanation:

5 ÷ 29.95

= 5 ÷ 2995/100

= 5 × 100/2995

= 500/2995

≈ 0.167

5 divided by 29.95 is 0.167

Plz help me due tonight

Answers

Answer: Angle RTQ or QTR

If the radius of one circle is 4cm and the diameter of another circle is 12cm, what is the ratio
of circumferences for the small circle to the bigger circle?

Answers

Answer:

2 cm/3 cm

Step-by-step explanation:

Diameter of smaller circle = 8cm

Diameter of bigger circle = 12 cm

8cm/12cm = 2/3

When solved for x, which inequality represents the number line?
A) 12x − 8 > 8 + 4x
B) 12x − 8 > 8 − 4x
C) 12x + 8 > 8 + 4x
D) 12x + 8 > 8 − 4x

Answers

I think its C, i could be wrong but im pretty sure its C

Hhhhhhhhhtuubvyjjjnnbhjjjjj

How do you write a number to the power of something ?
( ex : 125 to the power of 5 )

Answers

Answer:

How do you write a number to the power of something ?

( ex : 125 to the power of 5 )

125⁵

thats it easy as much

true or false, two figures are mathematically similar if the angles change by the same scale factor.

Answers

Answer:

true

Step-by-step explanation:

when a figure is changed by a scale factor, it is similar. The angles and shape stay the same, but the size changes.

The sum of thirty and a number is equal to seventy less than a number times three

Answers

Answer:

30 +x = 3(y-70)

Step-by-step explanation:

Jackson’s mom limits the amount of time he is allowed to play video games. After Jackson plays for 9minutes, his mom tells him that he has used up 30% of his time. How many more minutes can Jackson play before he uses all of his time?

Answers

Answer:

21 minutes

Step-by-step explanation:

30%=9

10%=3

100%-30%=70%

7×10%=70%

3x7=21

=21minutes

Donna is collecting stamps. On the first day, she collects 5. On the second day, she collects 9. Each day, she collects 4 more stamps than the day before. How many total stamps will she have after 20 days?

Answers

Answer:

81 stamps

Step-by-step explanation:

Here we will use the AP formula

We know that

a_n = a + (n - 1)d

a = first term = 5

n = number of terms = 20

d = common difference = 9 - 5 = 4

On putting values

=> a_20 = 5 + (20 - 1)4

=> a_20 = 5 + (19)4

=> a_20 = 5 + 76

=> a_20 = 81

Therefore,

She will have 81 stamps after 20 days

[tex]\huge{\purple{\underline{\underline{\sf{\pink{ANSWER:-}}}}}}[/tex]

Here we have,

first term (a) = 5

no. of terms (n) = 20

common difference (d) = 9 - 5 = 4

[tex]\implies\tt{a_n = a + (n - 1) \times d} \\ \\ \implies\tt{a_20 = 5 + (20 - 1) \times 4} \\ \\ \implies\tt{a_20 = 5 + 19 \times 4} \\ \\ \implies\tt{a_20 = 5 + 76} \\ \\ \implies\tt{a_20 = 81}[/tex]

Hence, there will be 81 stamps after 20 days.
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