Answer:
B
Explanation:
Atom consists of proton and neutron in center (often referred as nucleus) and electrons circling those things.
Answer:
2.98 g CO2
Explanation:
1. Balance the chemical equation
1 Fe2O3 + 3CO -> 2Fe + 3CO2
2. Use periodic table to find mass from each CO2 and Fe2O3
3. Calculate
3.60 g Fe2O3 x 
x
= 2.98 g CO2
The relation between activation energy, rate constant and temperature is given by Arrhenius equation
Arrhenius equation is
ln (K2/ K1) = Ea / R (1/T1- 1/T2)
K2 = 1×10−3s−1 T2 = 525 ∘C = 798 K
K1 = 1×10−4s−1 T1 = 485 ∘c = 758 K
Ea = ?
R = gas constant = 8.314 J / mol K
ln (K2/ K1) = ln (10^-3 / 10^-4) = 2.303 = Ea /8 .314 (1/758 - 1 / 798)
2.303 = Ea / 8.314 (0.00132 - 0.00125)
Ea = 2.303 X 8.314 / (0.00132 - 0.00125) = 273530.6 J / mole
Ea = activation energy = 273.531 kJ / mole
Answer:
So, in general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.
Explanation:
Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons.
Have a happy day! <3Miss Hawaii
Answer:
95.3 grams.
Explanation:
Relative atomic mass data from a modern periodic table:
How many moles of Na are consumed?
.
.
How many moles of 
formula units will be produced?
Consider the ratio between the coefficient of and that of 
in the equation:
.
As a result,
.
What will be the mass of that many ?
Formula mass of :
.
.
