Answer:
11.9 g S
General Formulas and Concepts:
<u>Chem</u>
- Reading a Periodic Table
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
- Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
2.23 × 10²³ atoms S
<u>Step 2: Define conversions</u>
Avogadro's Number
Molar Mass of S - 32.07 g/mol
<u>Step 3: Dimensional Analysis</u>
<u />
= 11.8758 g S
<u>Step 4: Check</u>
<em>We are given 3 sig figs. Follow sig fig rules.</em>
11.8758 g S ≈ 11.9 g S
Answer:
Explanation:
Hello there!
In this case, according to this titration problem, it is possible to note there is a 1:3 mole ratio of CuFeS2 to CuCl2; it means that we can use the following equation:
Thus, by introducing the mass and molar mass of the former and the volume and concentration of the latter, we write:
Regards!
Answer:
1) represented by a lower case letter
2) always masked by dominant genes
3) only expressed in the absence of a dominant gene
Explanation:
So if I take a black and a yellow marker- and tried drawing the yellow over the black- or the other way around- you'd still only see the black marker. The recessive trait is like the yellow marker. Now if I drew the yellow marker with another yellow marker you would see the yellow. I hope this helps!
Answer: (a) K *[A][B]^2
(b) The answer is B
Explanation:
A)
Step1:A+B<--> C (fast)
Step2: B+C→D(slow)
Rate depends on slowest step.
so,
rate = k' [B][C] ...eqn 1
But C is intermediate.so use step 1
Since 1st step is an equilibrium,
Kc = [C] /[A][B]
so,
[C] = Kc [A][B] ...eqn 2
put eqn 2 in eqn 1
rate = k' *[B] * Kc [A][B]
= k'Kc*[A][B]^2
= K *[A][B]^2 {writing k'Kc = K}
Answer: K *[A][B]^2
B)
Answer is B
Since rate depends on slowest step.
if slowest step is:
X2Y2+Z2→X2Y2Z+Z
then only,
rate= k[X2Y2][Z2]
Answer: B
Answer:
46
Explanation:
Sodium metal has a molar mass of
22.99
