Answer:
121.5 L will be the new volume
Explanation:
To solve this we can use the Ideal Gases Law
P . V = n . R . T for the two situations. But the moles of gas in the balloon are always the same so:
P . V / R .T = P . V / R. T
R is a universal constant, we can reject it. So:
P₁ . V₁ / T₁ = P₂ . V₂ / T₂
We also need to convert T° C to T°K → T°C + 273
30°C + 273 = 303 K and -48°C + 273 = 225K
Let's replace → (50.4L . 100 kPa) / 303K = (30.8 kPa . V₂) / 225K
((50.4L . 100 kPa) / 303K ) . 225K = 30.8 kPa . V₂
3742.5 kPa . L = 30.8 kPa . V₂
3742.5 kPa . L / 30.8 kPa = V₂ → 121.5 L
Answer:
D
Explanation:
The answer is D. I'm not sure that it is a solid. I don't think it is a ppte, which is the only way it can be a true solid. It is ionic if the reaction is taking place in water and there is someway to start the reaction. Be that as it may, the internal balace numbers of the chemical produced is the only possible answer. The balanced eq;uatioon is
2Al + 3Br2 ==> 2AlBr3
Let's start with the amount given in percent. Let our basis be 100 grams of compound. So, that means that in this amount, 57.1 g is oxygen and 100-57.1=42.9 g is carbon. Since there is 1:1 atom ratio, it also means that moles oxygen = moles carbon.
Moles = Mass/Relative Mass
Let x be the relative mass of oxygen
57.1/16 = 42.9/x
Solving for x,
<em>x = 12.02 amu</em>
Answer:
Li2S>Na2S>K2S>Rb2S>Cs2S
Explanation:
Lattice Energy is a type of potential energy which may be defined in as, energy that is required to break apart an ionic solid and convert its component atoms into gaseous ions. More technically, it is a measure of the energy contained in the crystal lattice of a compound, equal to the energy that would be released if the component ions were brought together from infinity.
Lattice energy of ionic compounds decreases with increasing ionic sizes. Since the anion is the same, we consider increase in cation sizes. We discover that for gtoi 1 cations; Li+<Na+<K+<Rb+<Cs+. The ionic lattice energy decreases in the reverse order. Li2S will show the largest lattice energy since it contains the smallest cation in the list.
Compound monthly is correct