Answer:
Option d. 6.95 g
Explanation:
First of all, we state the reaction:
2NaCl + Pb(NO₃)₂ → PbCl₂ + 2NaNO₃
We determine the moles of each reactant, to state the limiting
Firstly we convert volume frm mL to L
0.200 L . 0.250M = 0.05 moles of NaCl
0.200L . 0.250M = 0.05 moles of Pb(NO₃)₂
Acording to stoichiometry we know that relation is 1:2, so the limiting reagent is the NaCl.
For 1 mol of Pb(NO₃)₂ I need 2 moles of NaCl
For 0.05 moles of Pb(NO₃)₂ I would need, the double → 0.1 moles
(We only have, 0.05 moles of NaCl)
Stoichiometry to the formed product is 2:1
From 2 moles of NaCl I produce 1 mol of PbCl₂
From 0.05 moles I would produce, the half → 0.025 moles
Let's convert the moles to mass → 0.025 mol . 278.1 g / 1mol = 6.95 g
Answer:
space between particles
Explanation:
Properties of gases:
Molecule of gases randomly move everywhere and occupy all available space.
Gases don't have definite volume and shape and take the shape and volume of container in which it present.
Their densities are very low as compared to the liquid and solids.
Gas molecules are at long distance from each other therefore by applying pressure gases can be compressed.
The very weak inter molecular forces are present between gas molecules.
Properties of Liquid:
Liquid have definite volume but don,t have definite shape.
Their densities are high as compared to the gases but low as compared to the solids.
In liquid, molecules are close to each other and have greater inter molecular forces as compared to the gas molecules.
Properties of solids:
Solids have definite volume and shape.
In solids molecules are tightly pack and very close to each other.
Their melting and boiling point are every high.
The densities of solids are also very high as compared to the liquid and gas.
There are very strong inter molecular forces are present between solid molecules.
(2C+2+N-X-H)/2
(2*7+2+0-0-8)/2
4
Answer:
85.6 g
Explanation:
Step 1: Write the balanced combustion equation
C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O
Step 2: Calculate the moles corresponding to 140 g of H₂O
The molar mass of H₂O is 18.02 g/mol.
140 g × 1 mol/18.02 g = 7.77 mol
Step 3: Calculate the moles of C₃H₈ needed to produce 7.77 moles of H₂O
The molar ratio of C₃H₈ to H₂O is 1:4. The moles of C₃H₈ needed are 1/4 × 7.77 mol = 1.94 mol.
Step 4: Calculate the mass corresponding to 1.94 moles of C₃H₈
The molar mass of C₃H₈ is 44.10 g/mol.
1.94 mol × 44.10 g/mol = 85.6 g
The answer is a, alpha radiation
