Answer:
It represents the <em>number of atoms</em> of that particular element present in the compound. In C₂H₄O₂ there are 2 Carbon atoms, 4 Hydrogen atoms and 2 Oxygen atoms.
Answer:
Characteristics of the genetic code. The genetic code consists of 64 triplets of nucleotides. These triplets are called codons.With three exceptions, each codon encodes for one of the 20 amino acids used in the synthesis of proteins.
Explanation:
This should help :)
Example 1: A 36.0 g sample of water is initially at 10.0 °C.
How much energy is required to turn it into steam at 200.0 °C? (This
example starts with a temperature change, then a phase change followed
by another temperature change.)
Solution:
<span>q = (36.0 g) (90.0 °C) (4.184 J g¯1 °C¯1) = 13,556 J = 13.556 kJ
q = (40.7 kJ/mol) (36.0 g / 18.0 g/mol) = 81.4 kJ
q = (36.0 g) (100.0 °C) (2.02 J g¯1 °C¯1) = 7272 J = 7.272 kJ
q = 102 kJ (rounded to the appropriate number of significant figures)
</span>
Answer:
The answer to your question is: 0.02
Explanation:
Data
Mass = 5.3 g of CaCl₂
Volume = 2.5 l
Molarity = ?
Formula
Molarity =
Process
1.- Calculate the molecular mass of CaCl₂
Molecular mass = mass of Calcium + mass of chlorine
Molecular mass = 40 + 2(35.5)
= 40 + 71
= 111 g
2.- Calculate the mles of CaCl₂
111 g of CaCl₂ ------------------ 1 mol
5.3 g ------------------- x
x = (5.3 x 1) / 111
x = 0.048 moles
3.- Calculate molarity
Molarity = 0.048 / 2.5
Molarity = 0.02
It is c I hope I helped out with this question!.