Answer:
0.336 J/g/C
Explanation:
Recall the equation for specific heat:
q = mcΔT
1250 = 25 x c x 149
c = 0.336
Answer:
ΔEN CO = 1.0
Explanation:
To calculate the electronegativity difference, we have to substract the element which has the highest EN to the other, that has a low value.
For this case EN from O - EN from C
Electronegativity is a property of the periodic table that increases diagonally, where Fr and Rb are the elements of less EN while F is the most electronegative element, with a value of 4. This is because F is an element with a high ionization energy and a negative electronic affinity.
ΔEN CO = 3.5 - 2.5 = 1.0
Electronegativity (EN) describes the ability of an atom to compete for
electrons with other atoms to which it is attached.
<span>2<span>N2</span>+3<span>H2</span>→2N<span>H3
That's the balanced equation. As shown, 4 molecules of N2 would react with 12 molecules of H2. Since not that much H2 molecules exist, then it would serve as the limiting reactant. Therefore:
9 mol H2 * (2NH3 / 3H2) = 6 molecules of ammonia
</span></span>
It is given that the charge on potassium is +1 i.e. Potassium is a cation, K⁺
The charge on selenium is given as -2, i.e. selenium is an anion, Se²⁻
The two ions are shown to combine to form a molecule: KXSeY where X and Y correspond to the proportions in which the two atoms combine.
Since the molecule is neutral, the positive and negative charges need to be balanced. This is possible only if 2 units of K⁺ combines with 1 unit of Se²⁻.
Therefore, the formula would be K₂Se
X = 2 and Y = 1
