Answer:
1.D) CH4 + 2O2 → CO2 + 2H2O
2C)2,1,2
3.D)SIO2 + 4HF → SIF4 + 2H2O
4.D)2As + 6NaOH → 2Na3AsO3 + 3H2
5.C)SiCI4 + 2H2O → SiO2 + 4HCI
Explanation:
equal number of atoms of each elements in both the sides of the chemical equation is required to have an equation in balanced state.
A chemical reaction (signs)
- rusting
- change in base of chemical
- for example lets say u mix two chemicals, and then it becomes a different new chemical (it changed from the inside)
a physical
- a physical reaction is outer looks not inside.
- it changes on the outside, like changing a color
Answer:
See below in bold.
Explanation:
a) Yes because it is an ionic compound. Forms ions in water solution.
b) This is an alcohol with covalent bonds it does not ionise in water - no.
c) Yes this forms ions in water solution.
d) This is a sugar and does not ionise so No.
Answer:
37.9%
Explanation:
x/100 × 16.9 = 10.5
16.9x/100=10.5
16.9x=1050. (÷ b.s by 16.9)
x=62.1%
100%-62.1%=37.9%
