sand and ammonium chloride are insoluble in water but sodium chloride is soluble in water .ammonium chloride sublimates. so you first heat the mixture in a beaker covered with a watch glass then the ammonium chloride will accumulate on the watch glass leaving a mixture of sodium chloride and sand you then dissolve the mixture then filter using a beaker and a filter paper the filtrate is salt solution while the residue is sand you then evaporate the salt solution to remain with salt
Answer: The 234.74 grams of sample should be ordered.
Explanation:
Let the gram of 114 Ag to ordered be ![N_o](https://tex.z-dn.net/?f=N_o)
The amount required for the beginning of experiment = 0.0575 g
Time requires to ship the sample = 4.2hour = 252 min(1 hr = 60 min)
Half life of the sample =
= 21 min
![\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{21 min}=0.033 min^{-1}](https://tex.z-dn.net/?f=%5Clambda%20%3D%5Cfrac%7B0.693%7D%7Bt_%7B%5Cfrac%7B1%7D%7B2%7D%7D%7D%3D%5Cfrac%7B0.693%7D%7B21%20min%7D%3D0.033%20min%5E%7B-1%7D)
![\log[N]=\log[N_o]-\frac{\lambda t}{2.303}](https://tex.z-dn.net/?f=%5Clog%5BN%5D%3D%5Clog%5BN_o%5D-%5Cfrac%7B%5Clambda%20t%7D%7B2.303%7D)
![\log[0.0575 g]=\log[N_o]-\frac{0.033 min^{-1}\times 252 min}{2.303}](https://tex.z-dn.net/?f=%5Clog%5B0.0575%20g%5D%3D%5Clog%5BN_o%5D-%5Cfrac%7B0.033%20min%5E%7B-1%7D%5Ctimes%20252%20min%7D%7B2.303%7D)
![N_o=234.74 grams](https://tex.z-dn.net/?f=N_o%3D234.74%20grams)
The 234.74 grams of sample should be ordered.
Answer:
Everything in the universe has mass.
Explanation:
Based on the data provided, the total energy of the reaction is 1066 kJ and the reaction is endothermic
<h3>What is the total energy of a reaction?</h3>
The total energy change of a reaction is the difference between the total bond energy of the reactants and the total bond energy of the products.
- If the total change in bond energy is positive, the reaction is endothermic.
- If the total change in bond energy is negative, the reaction is exothermic.
- The total energy change of a reaction = bond energy of reactants - bond energy of products
Bond energy of reactants = 2000 kJ
Bond energy products = 934 kJ
Total energy of reaction = (2000 - 934) kJ = 1066 kJ
The total energy of the reaction is 1066 kJ and the reaction is endothermic.
Learn more about bond energy at: brainly.com/question/16997325