Answer : The correct option is A.
Explanation :
Law of conservation of mass : In the chemical reaction, the mass of reactant must be equal to the mass of product.
A. 
The mass of reactant side = ![2C_4H_{10}+2Cl_2+12O_2=[8(12)+20(1)]+4(35.5)+24(16)=642g](https://tex.z-dn.net/?f=2C_4H_%7B10%7D%2B2Cl_2%2B12O_2%3D%5B8%2812%29%2B20%281%29%5D%2B4%2835.5%29%2B24%2816%29%3D642g)
The mass of product side = 
This means, the mass of product is equal to the mass of reactant. The mass remains conserved and obeys the law of conservation of mass.
The reaction B, C, D, E does not obey the law of conservation of mass.
Therefore, Only reaction A obey the law of conservation of mass.
Answer:23.976
Explanation:830j = 197.6 cal. 197.6/100g=1.976 degrees. plus 22 degrees =23.976
Answer:
The answer is the second picture.
Explanation:
<u>Answer:</u>
<em>Here the given material is taken and mixed with water.</em>
<u>Explanation:</u>
The amount of material and water taken are same. Hence if it is not soluble in water it should make a dense and flowy paste like material and if it is soluble in water it should this and thicker density of water should remain.
If the amount of water that we are taking is more than the material will float in water if it is not soluble and lighter than water or would sink if it is heavier than water.
Answer: electron–negative, neutron–neutral, proton–positive
Explanation:
Atom is made up of three subatomic particles named protons, neutrons and electrons. Both protons and neutrons are found inside the nucleus of the atom, while electrons are found outside the nucleus of the atom. The charge distribution are as follows:
- The proton carry a positive charge
- The neutron carry no electric charge (i.e electrically neutral)
- The electron carry a negative charge
