Explanation:
An equation that consists of same number of atoms on both reactant and product side is known as a balanced chemical equation.
For example, 
Number of atoms on reactant side are as follows.
C = 7
H = 6
O = 3
Number of atoms on product side are as follows.
C = 1
H = 2
O = 3
Therefore, to balance this chemical equation we multiply 
by 8 on reactant side. Whereas we multiply 
by 7 and 
by 3 on product side.
Therefore, the balanced chemical equation will be as follows.
Answer:
the answer is C. The money time and resources used on the model
Option d: copper.
Because copper is an element, not a mixture.
I believe the correct answers from the choices listed above are the second and the last option. At constant pressure, the systems 2A(g) + B(g) ---> 4C(g) and 2C(g) A(s) + B(s) ---> C(g) produces work to the surroundings. <span>When a gas is evolved during a chemical reaction, the gas can be imagined as displacing the atmosphere - pushing it back against the atmospheric pressure. The work done is therefore V*P where V is the volume of gas evolved, and P is the atmospheric pressure. </span>
Answer:
10 neutron
Explanation:
No.of neutron=Mass no. -- atm no.(or no.of p)
No of neutron=19 -- 9
=10
