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Mn + HI → H₂ + MnI₃
Balance I.
1 on the left, 3 on the right. Add a coefficient of 3 in front of HI.
Mn + 3HI → H₂ + MnI₃
Balance H.
3 on the left, 2 on the right. Multiply everything else by 2.
2Mn + 6HI → H₂ + 2MnI₃
Now we have 6 on the left and 2 on the right. Add a coefficient of 3 in front fo H₂.
2Mn + 6HI → 3H₂ + 2MnI₃
Balance Mn.
2 on the left, 2 on the right. Already balanced.
Our final balanced equation:
2Mn + 6HI → 3H₂ + 2MnI₃
Hope this helps!
Evaporation happens<span> when atoms or </span>molecules<span> escape from the liquid and turn into a vapor. Not all of the </span>molecules in a liquid have the same energy. <span>Sometimes a </span>liquid<span> can be sitting in one place (maybe a puddle) and its molecules will become a </span>gas<span>. That's the process called </span>evaporation<span>. It can happen when liquids are cold or when they are warm. It happens more often with warmer liquids. You probably remember that when matter has a higher temperature, the molecules have a higher </span>energy<span>. When the energy in specific molecules reaches a certain level, they can have a </span>phase change<span>. Evaporation is all about the energy in individual molecules, not about the average energy of a system. The average energy can be low and the evaporation still continues. </span>
AgNO3(aq) + NaCl(aq) = AgCl(s) + NaNO3
MWt AgNO3 = 169.87; AgCl = 143.32
From the eqn 169.87 g of AgNO3 yield 143.32 g of AgCl
1.000g of AgNO3 yield 143.32/169.87 g of AgCl
Hence 4.27 g will yield (143.32/169.87)×4.27 g of AgCl
= 3.60 g of AgCl which is the theoretical yield.
% yield = (2.56/3.60)× 100 = 71.1%
A skilled chemist (e.g., Marie Curie) would get close to 100%.
Upper N upper H subscript 4 upper C l (s) right and left arrows stacked above each other upper N upper H subscript 3 (g) plus upper H upper C l (g)
Explanation:
The given equation is;
NH₄Cl ⇄ NH₃ + HCl
This equation is clearly different from the other ones.
- In the reactant going forward, there is a right and left arrows stacked above each other.
- The symbol is ⇄ and it is used to show reversibility of chemical reactions.
learn more:
Chemical reactions brainly.com/question/3953793
#learnwithBrainly
Coulomb's law mathematically is:
F = kQ₁Q₂/r²
we integrate this with respect to distance to obtain the expression for energy:
E = kQ₁Q₂/r; where k is the Coulomb's constant = 9 x 10⁹; Q are the charges, r is the seperation
Charge on proton = charge on electron = 1.6 x 10⁻¹⁹ C
E = (9 x 10⁹ x 1.6 x 10⁻¹⁹ x 1.6 x 10⁻¹⁹) / (185 x 10⁻¹²)
E = 1.24 x 10⁻¹⁸ Joules per proton/electron pair
Number of pairs in one mole = 6.02 x 10²³
Energy = 6.02 x 10²³ x 1.24 x 10⁻¹⁸
= 746.5 kJ