Answer:
Its a chemical change.
Explanation:
When baking soda and vinegar are mixed bubbles formed and new product is formed by both reactant. So its a chemical change because in a chemical change new substances are formed.
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible
These changes occur due to chemical reactions
These may not be observed with naked eye
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood
Boiling of egg: that change the chemical composition of protein in the egg .
The reaction of Hydrogen and oxygen:
H 2 (g) + O 2 (g) -------------------------------------> 2H 2O (l)
Answer:
i try to solve it for you, and i aplode a similer question for you
Explanation:
I think it is b. Ga, Ge, As, Se
Halogens have seven valence electrons and reqires one more electron to complete its octet
Answer:
V = 96.61 L
Explanation:
Given data:
Number of moles = 4.0 mol
Pressure = 780 torr (780/760 = 1.03 atm)
Temperature = 30°C
Volume of gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
30+273 = 303 K
1.03 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K × 303 K
V = 99.505 atm.L / 1.03 atm
V = 96.61 L
