Answer:
Molarity of the solution = 3.000 M
Volume of the solution = 250.0 mL = 0.25 L
moles in 250.0 mL = molarity x volume of the solution
= 3.000 M x 0.25 L
= 0.75 mol
Hence, 0.75 mol of NaCl is needed to prepare 250.0 mL of 3.000 M NaCl solution.
Moles (mol) = mass (g) / molar mass (g/mol)
Moles of NaCl in 250.0 mL = 0.75 mol
Molar mass of NaCl = 58.44 g/mol
Mass of NaCl in 250.0 mL = Moles x Molar mass
= 0.75 mol x 58.44 g/mol
= 43.83 g
Hence, 43.83 g of NaCl is needed to prepare 250.0 mL of 3.000 M solution.
Explanation:
<span>The answer is "D" where the number of collisions per unit area is reduced by one-half. Drawing back on the piston means the volume is increased. The pressure is reduced. There are fewer collisions when the pressure is reduced.</span>
Answer:
The bonds that exist between their atoms and molecules differ on an atomic scale.
Explanation:
The three basic states of matter are solid, liquid, and gas. The major difference between them is the strength of the bonds that hold their molecules together. This affects the way that the molecules interact with each other.
The intermolecular forces binding solids together are very strong. This makes solids rigid and not able to move about freely, but rather, only able to vibrate about a mean position.
The intermolecular forces binding liquid atoms together are a lot weaker than that of solids. This makes liquids able to flow.
The intermolecular forces binding gas molecules together are the weakest. As a result, the gases can move about freely and occupy no definite volume.
No, because the valance of boron is 3 and its satisfied by 3
Explanation:
Density = 1.60 g/mL
Initial Temperature T1 = 218.0°C + 273 = 491 K (Upon converting to kelvin temperature)
Final Temperature T2 = 750.0°C + 273 = 1023 K (Upon converting to kelvin temperature)
Mass of gas = 1.00 lb = 453.592 g (Upon converting to g)
Final Volume V2 = ?
Initial volume can be obtained from;
Density = Mass / Volume
Volume = Mass / Density
Volume = 453.592 / 1.60 = 283.495 ml
Initial Volume V1 = 283.495 ml
Using charles law;
V1 / T1 = V2 / T2
V2 = V1 * T2 / T1
V2 = 283.495 * 1023 / 491
V2 = 590.66 ml
