<span>He used the patterns he found in properties of known elements to predict the properties of unknown elements.</span>
the element is Ca with atomic number 20
Number 2 is correct answers
Answer: they can combine to form water or hydrogen peroxide.
Explanation:
sorry if it wrong i just looked it up lol. hope this helps tho
a. 2683.168 g
b. 2683.168 g
c. 663.468 g
<h3>Further explanation</h3>
Given
Compounds
Required
The mass
Solution
Mass = mol x MW
a) P4010
(MW=283.9 g mol−1)
mass = 6.15 x 283.9 g mol−1
mass = 1745.985 g
b) AgC2H302
(MW=436.2875 g/mol)
mass = 6.15 x 436.2875 g/mol
mass = 2683.168 g
c) Fe(CN)2 (MW=107.881 g/mol)
mass = 6.15 x 107.881 g/mol
mass = 663.468 g