The senate only allows two senates from each state.
Answer: 43.3 l
Explanation:
1) Chemical equation:
2 Li(s) + 2 H₂O (l) → 2LiOH(aq) + H₂ (g)
2) Mole ratios:
2 mol Li : 2 mol H₂O : 2 mol LiOH : 1 mol H₂
3) Number of moles of Li that react
n = mass in grams / atomic mass = 24.6g / 6.941 g/mol = 3.54 moles
4) Yield
Proportion:
2 mol Li / 1 mol H₂ = 3.54 mol Li/ x
⇒ x = 3.54 mol Li × 1 mol H / 2 mol Li = 1.77 mol H₂
4) Ideal gas equation
PV = nRT ⇒ V = nRT / P
V = 1.77 mol × 0.0821 [atm×l / (mol×K)] × 301 K / 1.01 atm = 43.3 l
V = 43.3 l ← answer
Answer:
The sodium has more moles.
n(Na)=2.09 mole
n(O)=0.999 mole
Answer:
1 M
Explanation:
Step 1:
Data obtained from the question. This includes the following:
Volume of base (Vb) = 100mL
Volume of ac(Va) = 20mL
Molarity of acid (Ma) = 5M
Molarity of base (Mb) =...?
Step 2:
The balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H2O
From the above equation, the following were obtained:
Mole ratio of the acid (nA) = 1
Mole ratio of the base (nB) = 1
Step 3:
Determination of the molarity of the base.
The molarity of the base can be obtained as follow:
MaVa/MbVb = nA/nB
5 x 20 / Mb x 100 = 1
Cross multiply to express in linear form
Mb x 100 = 5 x 20
Divide both side by 100
Mb = (5 x 20)/100
Mb = 1 M
Therefore, the molarity of the base is 1 M
Answer:
i think its false because heat is defined as the sum of kinetic enegry present in the molecules of substances.
