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Greeley [361]
3 years ago
8

na2s + hcl _____ nacl + h2s Which of these would represent the coefficients needed to balance this equation? A) 1, 1, 1, 1 B) 1,

2, 2, 1 C) 2, 1, 1, 2 D) 2, 2, 2, 2
Mathematics
1 answer:
USPshnik [31]3 years ago
5 0

Answer:

B) 1, 2, 2, 1

Step-by-step explanation:

In given equation:

Left side:                                Right Side:

  2 Na                                          1 Na

  1 S                                              1 S

  1 H                                             2 H

  1 Cl                                             1 Cl

To equal the number of Na and H atoms on both sides, HCl and NaCl will have a coefficient of 2 to balance the equation while Na₂S and H₂S will have a coefficient of 1.

1 Na₂S + 2 HCl ⇒ 2 NaCl + 1 H₂S

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Express each percent as a fraction or mixed number in simplest form.
kari74 [83]

Answer:

120/100

Step-by-step explanation:

120÷20= 6

100÷20=5

6/5 = 1⅕

6 0
3 years ago
The length of a room is 23 1/2 feet. When using a 1/8 inch = 1 foot scale, find the length of
LuckyWell [14K]

Answer:

2.9375 inches or 2 15/16"

Step-by-step explanation:

23 1/2 feet equals 282 inches

(1/8 ÷ 12) = (x ÷ 282)

cross-multiply:

35.25 = 12x

x = 2.9375 or 2 15/16 inches

4 0
3 years ago
Please help me!!!! Due in 1 hour, whoever helps me will get a brainliest!
ira [324]

Answer:

1.) The ratio of peaches to oranges 5 : 4

2.) 3 : 12

3.) I have 8 fruits in total, but 2 blueberries. The ratio using numbers would be: 8 : 4

4.)

- 11 : 14

- 14 : 25

- 25 : 11

- 14 : 11

5.) a. False

b. True

c. False

d. True

e. True

Alice is correct. The ratio is 6 : 9 because the question asks what the ratio is of students playing volleyball (6) TO basketball (9).  

Hope this helped and I answered on time :)

Step-by-step explanation:

5 0
3 years ago
Plz I need help on this question
Alina [70]

Answer:

11.33

Step-by-step explanation:

First find the markup

8.80 * 25%

8.8 *.25 = 2.20

The new price is 8.80+2.20 = 11

Now find the tax

11*.03

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Add the tax to the new price

11+.33

11.33

3 0
3 years ago
Read 2 more answers
Simplify. [6.6 ÷ (–5 + 3)] • (–1)
eimsori [14]
Hi there, we use PEMDAS to solve this problem, PEMDAS is parenthesis, Exponents, Multiply, Divide, Add, and Subtract. In this case, we have [6.6÷(-5+3)]*(-1), 6.6/-5+3(-1)=6.6/-2(-1)=(-3.3)(-1)=3.3. So, your answer is 3.3
8 0
3 years ago
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