Answer:
25%
Step-by-step explanation:
40-30=10
10/40*100
25%
Answer:
4Na + 1O2 > 2Na2O
SF6 > 1S + 3F2
2FE2O3 > 4FE + 3O2
Step-by-step explanation:
1. Identify the Products and Reactants(always do O2 last)
2. determine how many atoms of each element are present on each side of the equation
3. Add Coefficients and never change the subscripts. If there's a coefficient in front of any compound, it is distributed to both elements.
4. find the total number of atoms on both sides of the equation and make sure they equal with each other
Answer:
Point C
Step-by-step explanation:
6/5 = 1 1/5, and point C looks the closest to 1 1/5
Answer:
= 8g + 12h + 14
Step-by-step explanation:
2( 4g+6h+7)
= 8g + 12h + 14
Answer:
7, -7
Step-by-step explanation:
x^2-6.5= 42.5 add 6.5 to both sides
x^2= 49
The square root of 49 is 7 and -7.
