The statement that is not true about an acid is B. can accept a proton (H+) from some other substance. This is because acid itself is a proton donor, thus there is no way it will also be an acceptor. A base is the proton acceptor. All the other choices are correct about an acid.
Answer:
The area of parallelogram can be found by product of its base and height. The calculations are shown below:
Explanation:
We know that,
Area of parallelogram = base × height
assume base to be 21 cm.
Then,
sin 79° =
∴ height = 13 × 0.98 = 12.74
Area of parallelogram = 21 × 12.74
= 267.54
The area of parallelogram is calculated as 267.54 .
Answer:
6.72 g
Explanation:
Given data:
Mass of calcium chlorate = 13.8 g
Mass of oxygen produced = ?
Solution:
Chemical equation:
Ca(ClO₃)₂ → CaCl₂ + 3O₂
Number of moles of calcium chlorate:
Number of moles = mass / molar mass
Number of moles = 13.8 g/ 206.98 g/mol
Number of moles = 0.07 mol
Now we will compare the moles of oxygen and calcium chlorate.
Ca(ClO₃)₂ : O₂
1 : 3
0.07 : 3×0.07=0.21 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.21 mol × 32 g/mol
Mass = 6.72 g
Answer: there is not any correct answer but the law of conservation of matter states that the sum of the mass of the reactants should be equal to that of the product