Answer:
0.0286 moles
Explanation:
Given mass,
Molar mass of boron, M = 10.811 g/mol
Hence, there are 0.0286 moles in given mass of boron.
Answer:
C
Explanation:
All others include a chemical change of some sort
Answer:
Electrons would easily move through the person if there was no rubber around the wire.
Explanation:
The black rubber material is an insulator and will not allow the conduction of heat or electrical current through it. Electrical currents are generated by the movement of electrons through materials.
<em>Hence, if there was no rubber covering around the power cord, the person that plugged-in the power cord would have experienced electric shock because electrons would easily move through him/her from the wire. </em>
The separation of molecules. I wouldn't put that if i were you.
Answer:
17.3 g
Explanation:
<u>Given the following data;</u>
- Quantity of heat, Q = 0.507 J
- Temperature = 0.007°C
- Specific heat capacity of water = 4.2 J/g°C
Mathematically, Heat capacity is given by the formula;
Where;
- Q represents the heat capacity or quantity of heat.
- M represents the mass of an object.
- C represents the specific heat capacity of water.
- T represents the temperature.
Making "M" the subject of formula, we have;
Substituting the values into the formula, we have;
<em>Mass, m = 17.3 grams</em>