Answer:
Using dimensional analysis, we have....
4.515x1024 atoms x 1 mole/6.022x1023 atoms = 7.4975 moles = 7.498 moles of PD
So the official answer is 7.5
Explanation:
"Purellium Distinkamide" is a silly joke name for a made-up compound. The idea of this question is that no matter what the substance we are talking about is - water (H2O), hydrogen gas (H2), or even "Purellium Distinkamide" - a mole is always the same number of molecules, 6.022 x 1023. This is Avogadro's number and you have probably seen it around class a lot!
Explanation:
The given data is as follows.
Magnetic field (B) = 0.30 T
Current (I) = 24 A
n =
charge on electron (e) = C
Formula to calculate the potential difference is as follows.
V =
=
= V
Therefore, we can conclude that value of potential difference is V.
Answer:
5.67 g OF WATER WILL BE FORMED WHEN 13.7 g OF MnO2 REACTS WITH HCl GAS.
Explanation:
EQUATION FOR THE REACTION
Mn02 + 4HCl --------> MnCl2 + Cl2 + 2H2O
From the balanced reaction between manganese oxide and hydrogen chloride gas;
1 mole of MnO2 reacts to form 2 mole of water
At STP, the molecular mass of the sample is equal to the mole of the substance. So therefore:
(55 + 16 * 2) g of MnO2 reacts to form 2 * ( 1 *2 + 16) g of water
(55 + 32) g of MnO2 reacts to form 2 * 18 g of water
87 g of MnO2 reacts to form 36 g of water
If 13.7 g of MnO2 were to be used?
87 g of MnO2 = 36 g of H2O
13.7 g of MnO2 = ( 13.7 * 36 / 87) g of water
= 493.2 / 87 g of water
Mass of water = 5.669 g of water
Approximately 5.67 g of water will be formed when 13.7 g of manganese oxide reacts with excess hydrogen chloride gas.