Answer:
0.3382 kg
Explanation:
From the illustration:
<em>100g of the ore would contain 20.7 g of nickel by mass</em>. In order to obtain 70.0 g of nickel, the amount of the ore needed would be:
100 x 70.0/20.7 = 338.16 g
According to conversion units:
<em>1 g = 0.001 kg</em>
Hence,
338.16 g = 338.16 x 0.001 = 0.3382 kg
<em>Therefore, </em><em>0.3382 kg</em><em> of the ore would be required in order to obtain 70.0 g of nickel.</em>
Explanation:
Covalent bond -
This type of bonding takes place between the atoms of same or similar electronegativity , is referred to as covalent bonding .
Ionic bonding -
This type of bonding takes place between the atoms of different electronegativity , is referred to as Ionic bonding .
From the question ,
( a ) F₂ - Covalent bonding ( same atom , hence , same the electronegativity )
( b ) LiBr - Ionic bonding ( the electronegativity difference between Li and Br is high )
( c ) NaNH₂ - Ionic bonding ( the electronegativity difference between sodium and Nitrogen is high )
( d )CH₃CH₃ - Covalent bonding ( since , the electronegativity difference between carbon and hydrogen is similar )
Answer:
yes it is a chemical change
Explanation:
because first it was in liquid and turned into gas
it never will, it will pop
Answer:
1,2,5
Explanation:
Hydrogen can't really be classified into any group in the periodic table because it doesn't have properties that match that of any group exactly. However it exhibits a property of group 1A (formation of a univalent positive ion) and that of group 7A (formation if a univalent negative ion). It contains only one electron, hence this outermost electron is not shielded at all from the nucleus.
