It is A , each sodium ion is surrounded by one chloride ion . the explanation is because Chlorine needs one more electron to have a full outer most shell , and sodium has one electron in its outer most shell .
Answer:
Mass, gravitational force and height
Explanation:
Potential energy of body is the energy at rest in a body and it depends on the mass, acceleration due to gravity and height of a body;
Potential energy = mass x gravity x height = mgh
The more the mass, gravity and height of a body, the higher the potential energy a body will posses. This is why a stone at a height has more potential energy than one on the ground.
Answer:
13.5g of AgNO3 will be needed
Explanation:
Silver nitrate, AgNO3 contains 1 mole of silver, Ag, per mole of nitrate. To solve this problem we need to convert the mass of Ag to moles. Thee moles = Moles of AgNO3 we need. With the molar mass of AgNO3 we can find the needed mass:
<em>Moles Ag-Molar mass: 107.8682g/mol-</em>
8.6g * (1mol / 107.8682g) = 0.0797 moles Ag = Moles AgNO3
<em>Mass AgNO3 -Molar mass: 169.87g/mol-</em>
0.0797 moles Ag * (169.87g/mol) =
<h3>13.5g of AgNO3 will be needed</h3>
Answer:
(3) 34.5grammes of C2H6O
(4) 5.56 x 10^22 Formula units
(5) 0.5 moles of CaCO3
Explanation:
(3) molar mass of C2H6O = 24 + 6 + 16 = 46 g/mol
mass of C2H6O =0.75 mole x 46 g/mole = 34.5 grammes
(4) Formula units of NaCl = (5.4/ 58.5) x 6.022x10^23 = 5.56 x 10^22
(4) moles = mass / molar mass
molar mass of CaCO3 = 40 + 12 + 48 = 100 g/mol
moles of CaCO3 = 50/100 = 0.5 moles
