To find this out:
Turn the percent into a fraction and cross multiply!
5%=5/100
5 39
_ × ____
100
Multiply 39 × 100 (3,900)
Then divide by 5!
3900/5=780
39 is 5% of 780!
It is is y = -3
Good luck!!
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
