Answer:
Explanation:
Mᵣ: 58.44 278.11
Pb(NO₃)₂ + 2NaCl ⟶ PbCl₂ + 2NaNO₃
m/g: 26.3
1. Moles of NaCl
(b) Moles of PbCl₂
(c) Theoretical yield of PbCl₂
(d) Percent yield
Explanation:
(a) As per the mole concept, one mole of any atom contains atoms or molecules, that is, Avogadro's number of atoms.
Therefore, 1 mole of = molecules
= molecules
1 mole of = molecules
= molecules
1 mole of = molecules
= molecules
Hence, there are equal number of molecules present in the given atoms.
(b) Mass of each given atom will be calculated as follows.
Mass = no. of moles × molar mass
As one molecule of contains 2 atoms of hydrogen.
So, mass of 1 mole of =
= 2.016 g
mass of 1 mole of =
= 31.996 g
mass of 1 mole of =
= 37.996 g
Thus, we can conclude that has the greatest mass.
1) State the balanced chemical reaction
H2SO4 + 2NaOH -> Na2SO4 + 2H2O
2) State the molar ratios:
1 mol H2SO4 : 2 mol NaOH
3) Set the proportions using the number of moles of one rectant and x for the unknown one>
1 mol H2SO4 / 2 mol NaOH = x mol H2SO4 / 0.75 mol NaOH
=> x = 0.75 mol NaOH * [1 mol H2SO4 / 2 mol NaOH]
x = 0.375 mol H2SO4
4) Calculate the mass using the molar mass of H2SO4, MM.
MM = 2*1g/mol + 32.1 g/mol + 4*16 g/mol = 98.1 g/mol
mass = # of moles * molar mass = 0.375 mol * 98.1 g/mol = 36.79 g.
Answer: 36.8 grams
A conductor is a object that allows an electrical current to pass through it. An insulator does not let electrical currents pass through it but protect other objects from the electrical current. Conductors work to move currents to other spaces and Insulators work to minimize the transfer of heat energy.
Answer:
A. She can run the same distance in a shorter amount of time.
Explanation:
Speed can be computed with the formula:
Where:
v = speed
d = distance
t = time
So if you look at the formula, distance there tells you how far an object has traveled, and the time tells us how long it took to cover that distance. As you can see, speed and time are <u>inversely proportional. </u>This means that as one goes up, the other goes down. So if we reduce time travelling a certain distance, the speed increases.