All categories

3 years ago

Which of the following are correctly balanced reactions?Check all that apply.

2 answers:

7 0

To determine whether the given chemical reaction is indeed balanced, we just have to do elemental balance in which we determine if there are equal number of the same elements in both sides of the equation. From the choices, the balanced chemical equation are letters B and C.

Fynjy0 [20]3 years ago

6 0

Answer:

B and C

Step-by-step explanation:

We are given that

A. $Mg+FeO \rightarrow 2Fe+MgO$

On left side

Number of atoms of Fe =1

Number of atoms of O=1

Number of atoms of Mg=1

On right side

Number of atoms of Fe=2

Number of atoms of O=1

Number of atoms of Mg=1

Therefore ,the balance reaction is

$2Mg+2 FeO\rightarrow 2 Fe +2MgO$

Given reaction is not balanced reaction

B. $2H_2+O_2\rightarrow 2H_2O$

Number of atoms of oxygen and hydrogen are equal on both sides .

Hence, the given reaction is balanced .

C. $2K+Br_2\rightarrow 2KBr$

The number of atoms of potassium and bromine are equal on both sides.

Therefore, the given reaction is balanced .

D. $C+Cl_2\rightarrow CCl_4$

Number of atoms of Chlorine are not equal on both sides therefore, the given reaction is not balanced.

Hence,option B and C are true.

You might be interested in

Write an equation in point-slope form of the line having the given slope that contains the given point. m=34m=34, (36,24)

Basile [38]

All we have to do is input the x, y, and m value into the equation. It'd look like tihs:

y - 24 = 34(x -36)

3 0

3 years ago

What times what equals 375

xz_007 [3.2K]

75 * 5 = 375

Hope I helped! :)

4 0

3 years ago

Read 2 more answers

The sum of Jim's weight and Bob's weight is 180 pounds. If you subtract Jim's weight from Bob's weight, you get half of Bob's we

Furkat [3]

Answer:

120 pounds

Step-by-step explanation:

We can use systems of equations to solve this problem. Assuming j is Jim's weight and b is Bob's weight, the equations are:

j + b = 180

b - j = 1/2b

Let's get b - j = 1/2b into standard form (b, then j, then the equal sign, then the constant.)

$b - j = \frac{b}{2}\\\frac{b}{2} - j = 0$

Now we can solve using the process of elimination.

$b + j = 180\\\\\frac{b}{2} - j = 0\\\\b + \frac{b}{2} = 180\\\\b + b \cdot 2 = 180\cdot 2\\3b = 360\\b = 120$

Now we know how much Bob weighs, for fun, let's find Jim's weight by substituting into the equation.

$120 + j = 180\\j = 180-120\\j = 60$

So Bob weighs 120 pounds and Jim weight 60 pounds.

Hope this helped!

4 0

2 years ago

Read 2 more answers

X+y=120 5.25x+3.0y=517.2

Sauron [17]

I will try to solve your system of equations.
x+y=120;5.25x+3y=517.2
Step: Solvex+y=120for x:
x+y+−y=120+−y(Add -y to both sides)x=−y+120
Step: Substitute−y+120forxin5.25x+3y=517.2:
5.25x+3y=517.25.25(−y+120)+3y=517.2−2.25y+630=517.2(Simplify both sides of the equation)−2.25y+630+−630=517.2+−630(Add -630 to both sides)−2.25y=−112.8−2.25y−2.25=−112.8−2.25(Divide both sides by -2.25)y=50.133333
Step: Substitute50.133333foryinx=−y+120:
x=−y+120x=−50.133333+120x=69.866667(Simplify both sides of the equation)
Answer:
x=69.866667 and y=50.133333

4 0

2 years ago

Ten tiles numbered 1 through 10 are placed in a bag. You randomly choose one tile. Without replacing the first tile, you randoml

ruslelena [56]

You would have one tenths (1/10) of a chance to get a 4 on the first go. you would have four ninths (4/9) of a chance to get a number less than 5 out of the bag on the second go.

the overall probability would be two forty-fifths (2/45)

7 0

2 years ago