Answer:
1. Cu(s) + 2AgNO₃(aq) ⟶ Cu(NO₃)₂(aq) + 2Ag(s)
2. 50.92 g
3. $8.09
Step-by-step explanation:
1. Balanced equation
Cu(s) + 2AgNO₃(aq) ⟶ Cu(NO₃)₂(aq) + 2Ag(s)
===============
2. Mass of Ag
We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 63.55 107.87
Cu + 2AgNO₃ ⟶ Cu(NO₃)₂ + 2Ag
m/g: 15.00
(a) Calculate the moles of Cu
Moles Cu = 15.00 × 1/63.55
Moles Cu = 0.2360 mol Cu
=====
(b) Calculate the moles of Ag
The molar ratio is 2 mol Ag:1 mol H₂O
Moles of Ag = 0.2360 × 2/1
Moles of Ag = 0.4721 mol Ag
======
(c) Calculate the mass of Ag
Mass of Ag = 0.4721 × 107.87
Mass of Ag = 50.92 g Ag
===============
3. Value of Ag
Mass of Ag = 50.92 × 0.0353/1
Mass of Ag = 1.797 oz
Value of Ag = 1.797 ×4.50/1
Value of Ag = $8.09
The element used to paint the skin to prevent infection from cuts and scratches is iodine.
Answer: false
Explanation: Reason being A substance cannot be a gas or a mixture, only can a pure substance that occurs in nature may
At STP, P = 1 atm, and T = 0 C
Thus, PV = nRT => V = nR(273). We will use this later...
if you have 35.4 Ca, and the molar mass of Ca is 40.08, you get .883 moles Ca. Thus, since it takes 2 moles of Ca to form a reaction, you only need half the moles of Ca of O2. Thus, n(O2) = .883/2
Tie this back to the first equation and you get
V = .442 * <span>0.082057(which is R) * 273 = 9.9 L</span>
Answer:
The attractive forces between them is very weak
Explanation:
