Answer:
a,d,e
Explanation:
its a,d, and e because clean air keeps us alive and other organisms need it to stay alive
When gas molecules condence they become a liquid and if the liquid molecules condence they turn into a solid but the solid molecules cannot condence
Answer:
Chemical formula of Oxygen is O2.
We know ,
1 mole of a substance contains 6.022×10^23, Avogadro’s Constat.
Here, Molar mass of O = 16u
And molar mass of O2 = 32u
And 32g of O2 = 1 mole of O2
It means that,
32g of O2 = 6.022×10^23 molecules
Answer:
a. HI(aq)+NaOH(aq) → H2O(l)+NaI(aq)
b. HBr(aq) +KOH(aq) → H2O(l)+KBr(aq)
c. HNO3(aq)+Ba(OH)2(aq) → BaNO3(aq)+H2O(aq)
D. HClO4(aq)+Sr(OH)2(aq) → SrClO4(aq)+H2O(aq)
Explanation:
In a neutralization reaction, an acid and a base react to form water and salt and involves the combination of H+ ions and OH- ions to generate water.
In this case, the atoms have charge positive and negative, the only thing we have to do is to change in the products taking account that positive with negative an vice-versa.
H+I-(aq)+Na+OH-(aq) → H+2O-(l)+Na+I-(aq)
Answer:
CH4 + 2O2 -> CO2 + 2H2O
Explanation:
This reaction involves the combustion of methane (CH4)
General form of balancing reactions involving combustion of hydrocarbons is
CxHy + [x+(y/4)]O2 -> xCO2 + (y/2)H2O
x= the number of carbon atoms in the compound = 1
y= the number of hydrogen atoms in the compound = 4
CH4 + [(1+(4/4)]O2 -> CO2 + (4/2)H20
CH4 + (1+1)O2 -> CO2 + 2H2O
CH4 + 2O2 -> CO2 + 2H2O
