Answer:
Mass of chlorine = 47.22 g
Explanation:
Given data:
Mass of sodium = 30.5 g
Mass of chlorine= ?
Solution:
Chemical equation:
2Na + Cl₂ → 2NaCl
Number of moles of Na:
Number of moles = mass/molar mass
Number of moles = 30.5g/ 23 g/mol
Number of moles = 1.33 mol
Now we will compare the moles of Cl
₂ with Na from balance chemical equation.
Na : Cl
₂
2 : 1
1.33 : 1/2×1.33 = 0.665 mol
Mass of chlorine gas:
Mass = number of moles × molar mass
Mass = 0.665 mol × 71 g/mol
Mass = 47.22 g
Answer:
C option is the correct answer
Temp. of Beaker A = 68°C, Temp. of Beaker B = 57°C
I think this is right srry if its not :]
Answer:
D is correct. Atoms of the same element are the same
Explanation:
6. Which of the following statements is one of the postulates in Dalton's atomic theory?
A) All atoms are all the same.
B) Only some elements are composed of atoms.
C) Atoms of the same element are different.
D Atoms of the same element are identical.
D is correct. Atoms of the same element are the same
Atoms of different elements are different
when different atoms combine, they do this in simple ratios and form molecues which are the building block of compounds
Answer:
Explanation:The pH scale ranges from 0 to 14. The pH of a solution is a measure of its acidity or alkalinity (base). ... A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, a change in two units represents a change in the concentration of hydrogen ions by a factor of 100.
