Answer:
180 g Ca
General Formulas and Concepts:
<u>Chemistry - Atomic Structure</u>
Explanation:
<u>Step 1: Define</u>
4.4 mol Ca
<u>Step 2: Identify Conversions</u>
Molar Mass of Ca - 40.08 g/mol
<u>Step 3: Convert</u>
<u /> = 176.352 g Ca
<u />
<u>Step 4: Check</u>
<em>We are given 2 sig figs. Follow sig fig rules and round.</em>
176.352 g Ca ≈ 180 g Ca
Answer:
The correct option is <em>b) SO₃(g) + NO(g) ⇌ SO₂(g) + NO₂(g)</em>
Explanation:
The relation between Kc and Kp is given by the following equation:
where R is the gas constant (0,082 L.atm/K.mol), T is the temperature (in K) and dn is the change in moles.
The change in moles (dn) is calculated as:
dn = moles of products - moles reactants
If dn=0, RT= 1 ⇒ Kc=Kp
We calculate dn for each reaction from the estequiometrial coefficients of products and reactants as follows:
a) 4 NH₃(g) + 3 O₂(g) ⇌ 2 N₂(g) + 6 H₂O(g)
dn= (2+6) - (4+3) = 1 ⇒ Kc ≠ Kp
b) SO₃(g) + NO(g) ⇌ SO₂(g) + NO₂(g)
dn = (1+1) - (1+1)= 0 ⇒ Kc = Kp
c) 2 N₂(g) + O₂(g) ⇌ 2 N₂O(g)
dn= 2 - (2+1) = -1 ⇒ Kc ≠ Kp
d) 2 SO₂(g) + O₂(g) ⇌ 2 SO₃(g)
dn = 2 - (2+1) = -1 ⇒ Kc ≠ Kp
The reaction in which Kc=Kp is b), because reactants and products have the same number of moles.
ATOMIC NUMBER: It is the number of protons present in the nucleus of every atom
MASS NUMBER: It is the number of nucleon. Nucleon are the number of proton and neutrons present in the nucleus.
PROTON NUMBER: Proton number equal to the atomic number.
ELECTRON NUMBER: Electron Number is equal to the atomic number.
NEUTRON NUMBER: It is Mass Number - Atomic Number.
CHARGE: It is due to the addition or removal of the electron. + charge when electron removed and - charge when electron is added.
SYMBOL: It is represented as,
Z is Mass Number
A is Atomic Number
<h2>_____________________________________</h2><h2>Worksheet:</h2>(I) ATOMIC NUMBER: 17
MASS NUMBER: 35.5
PROTON NUMBER: 17
ELECTRON NUMBER: 17
NEUTRON NUMBER: 18.5
CHARGE: 0
<h2>_____________________________________</h2>(II) ATOMIC NUMBER: 71
MASS NUMBER: 180
PROTON NUMBER: 71
ELECTRON NUMBER: 71
NEUTRON NUMBER: 109
CHARGE: 0
<h2>_____________________________________</h2>(III) ATOMIC NUMBER: 40
MASS NUMBER: 86
PROTON NUMBER: 40
ELECTRON NUMBER: 38
NEUTRON NUMBER: 46
CHARGE: +2
<h2>_____________________________________</h2>(IV) ATOMIC NUMBER: 92
MASS NUMBER: 238
PROTON NUMBER: 92
ELECTRON NUMBER: 86
NEUTRON NUMBER: 146
CHARGE: +6
<h2>_____________________________________</h2>(V) ATOMIC NUMBER: 82
MASS NUMBER: 206
PROTON NUMBER: 82
ELECTRON NUMBER: 78
NEUTRON NUMBER: 124
CHARGE: +4
<h2>_____________________________________</h2>(VI) ATOMIC NUMBER: 34
MASS NUMBER: 79
PROTON NUMBER: 34
ELECTRON NUMBER: 36
NEUTRON NUMBER: 45
CHARGE: -2
<h2>_____________________________________</h2>(VII) ATOMIC NUMBER: 48
MASS NUMBER: 113
PROTON NUMBER: 48
ELECTRON NUMBER: 49
NEUTRON NUMBER: 65
CHARGE: -1
<h2>_____________________________________</h2>(VIII) ATOMIC NUMBER: 21
MASS NUMBER: 42
PROTON NUMBER: 21
ELECTRON NUMBER: 21
NEUTRON NUMBER: 21
CHARGE: 0
<h2>_____________________________________</h2>(IX) ATOMIC NUMBER:
MASS NUMBER:
PROTON NUMBER:
ELECTRON NUMBER:
NEUTRON NUMBER:
CHARGE:
<h2>_____________________________________</h2>(X) ATOMIC NUMBER: 83
MASS NUMBER: 209
PROTON NUMBER: 83
ELECTRON NUMBER: 80
NEUTRON NUMBER: 126
CHARGE: +3
<h2>_____________________________________</h2>(XI) ATOMIC NUMBER: 47
MASS NUMBER: 108
PROTON NUMBER: 47
ELECTRON NUMBER: 47
NEUTRON NUMBER: 61
CHARGE: 0
<h2>_____________________________________</h2>(XII) ATOMIC NUMBER: 49
MASS NUMBER: 116
PROTON NUMBER: 49
ELECTRON NUMBER: 46
NEUTRON NUMBER: 67
CHARGE: +3
<h2>_____________________________________</h2>(XIII) ATOMIC NUMBER: 53
MASS NUMBER: 128
PROTON NUMBER: 53
ELECTRON NUMBER: 54
NEUTRON NUMBER: 75
CHARGE: -1
<h2>_____________________________________</h2>(XIV) ATOMIC NUMBER: 76
MASS NUMBER: 188
PROTON NUMBER: 76
ELECTRON NUMBER: 72
NEUTRON NUMBER: 112
CHARGE: +4
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />