NA = 6.022*10^23
number of atoms = number of moles * avogadros number
number of atoms = <span>6.022*10^23 * 1.4 moles * 4 atoms / molecules of PCl3
Number of atoms = 3.37*10^23 atoms.</span>
Answer:
Caesium-133 is composed of...
- 55 protons
- 78 neutrons
- 55 electrons.
Answer:
100. mL
Explanation:
Step 1: Write the balanced equation for the double displacement reaction
CaCl₂ + Na₂CO₃ ⇒ 2 NaCl + CaCO₃
Step 2: Calculate the moles corresponding to 1.00 g of CaCO₃
The molar mass of CaCO₃ is 100.09 g/mol.
1.00 g × 1 mol/100.09 g = 0.0100 mol
Step 3: Calculate the moles of CaCl₂ required to produce 0.0100 moles of CaCO₃
The molar ratio of CaCl₂ to CaCO₃ is 1:1. The moles of CaCl₂ required are 1/1 × 0.0100 mol = 0.0100 mol.
Step 4: Calculate the volume of 0.100 M CaCl₂ that contains 0.0100 mol
0.0100 mol × 1 L/0.100 mol × 1000 mL/1 L = 100. mL
Answer:The answer is definatly not D, mainly for the reason that Acceleration is moving forward and adding speed. That said best option would be (B) a car traveling south with its cruise control set.
Explanation:The Cruise control will continue the Vehical speed that it is set to. The bus would work but it is traveling north at 25m/s or Meters Per second which usually with speed and move ment of vehicals it goes by Miles per hour. I Hope it is correct and this helps. Good luck :)
