Answer:
C. Candles
Explanation:
It cannot be as it is made of wax. Polythene is used in the manufacture of plastic products like containers, pipes, toys, etc.
Answer:
Aufbau Principle: Electrons occupy orbitals of lower energy first.
Pauli Exclusion Principle: An orbital can hold only two electrons and they must have opposite spin.
Hund's Rule: Electrons fill each orbital singly before any orbital gets a second electron.
Answer:
There are 10 atoms of oxygen in the reactants.
Explanation:
![4P + 5O_2\rightarrow P_4O_ {10}](https://tex.z-dn.net/?f=4P%20%2B%205O_2%5Crightarrow%20P_4O_%20%7B10%7D)
According to reaction , 4 atoms of phosphorus recatswith 5 molecules of oxygen to give 1 mole of phosphorus pentoxide.
Number of phosphorus atom on the reactant side = 4
Number of oxygen gas molecules on the reactant side = 5
1 molecule of oxygen has 2 atoms of oxygen.
So,number of oxygen atom on the reactant side = 5 × 2 = 10
Number of phosphorus atom on the product side = 4
Number of oxygen atom on the product side = 10
Answer:
The kinetic energy of the car is 566 kJ
Explanation:
The kinetic energy is calculated using this equation:
E = 1/2 m*v²
where:
E = kinetic energy
m = mass of the object
v = speed of the object
First, let´s convert the units of the speed:
96.6 km/h *(1 h / 3600s) * (1000 m / 1 km) =26.8 m/s
The kinetic energy will be:
E = 1/2 1577 kg * (26.8 m/s)² = 5.66 x 10⁵ kg m²/s² = 5.66 x 10⁵ J
E = 5.66 x 10⁵ J * (1 kJ /1000 J ) = <u>566 kJ</u>
Answer:−329.4 calorie
Explanation:Heat released by metal = q=m_mc_m(T_2-T1)q=m
m
c
m
(T
2
−T1)
m_m=50\ g\\c_m=0.108\ cal\ g^{-1}\ \degree C^{-1}\\q=50\times0.108(17-78)=-329.4\ caloriem
m
=50 g
c
m
=0.108 cal g
−1
°C
−1
q=50×0.108(17−78)=−329.4 calorie
Here minus sign indicate that heat is released