Answer:
Metal is copper.
Explanation:
Mass of a metal, m = 54 g
Heat energy required, Q = 773 J
The temperature changes from 63.0 °C to 100.0 °C.
We need to identify the metal. Heat required to raise the temperature is given by :
c is specific heat of the metal
We can identify the metal by finding its specific heat.
The metal is copper. Its specific heat is 
.
Answer: The correct answer is Option B.
Explanation:
To calculate the number of moles, we use the formula:
Molar mass of iron = 55.8 g/mol
Given mass of iron = 558.8
Putting values in above equation, we get:
For the given chemical equation:
By Stoichiometry,
4 moles of Iron produces 2 moles of Iron(III) oxide
So, 1 mole of Ion will produce = 
= 0.5 mole of Iron (III) oxide.
Hence, the correct answer is Option B.
Answer:
Lightbublb: electric to radiant
2nd image (can't tell what it is): chemical to electrical
windmill: motion to electric
fan: electric to motion
guitar: electric to sound.
Answer:
See explanation
Explanation:
The equation of the reaction is;
C3H8 + 5O2 ----> 3CO2 + 4H2O
Number of moles of C3H8 = 132.33g/44g/mol = 3 moles
1 mole of C3H8 yields 3 moles of CO2
3 moles of C3H8 yields 3 × 3/1 = 9 moles of CO2
Number of moles of oxygen = 384.00 g/32 g/mol = 12 moles
5 moles of oxygen yields 3 moles of CO2
12 moles of oxygen yields 12 × 3/5 = 7.2 moles of CO2
Hence C3H8 is the limiting reactant.
Mass of CO2 produced = 9 moles of CO2 × 44 g/mol = 396 g of CO2
1 moles of C3H8 yields 4 moles of water
3 moles of C3H8 yields 3 × 4/1 = 12 moles of water
Mass of water = 12 moles of water × 18 g/mol = 216 g of water
b) Actual yield = 269.34 g
Theoretical yield = 396 g
% yield = actual yield/theoretical yield × 100/1
% yield = 269.34 g /396 g × 100
% yield = 68%
Answer:
Nuclear fission
Explanation:
Because the little particles are being spread out and the two elements are broken apart
