The molal concentration of the solution is 0.67 mol/kg.
The formula for molal concentration (<em>b</em>) is
<em>b</em> = moles of solute/kilograms of solvent.
Moles of solute = 8.0 g × (1 mol/24 g) = 0.333 mol
b = 0.333 mol/0.50 kg = 0.67 mol/kg
Answer:
<h3>The answer is 3.0 g/mL</h3>
Explanation:
The density of a substance can be found by using the formula
From the question
mass = 15 g
volume = 5 mL
We have
We have the final answer as
<h3>3.0 g/mL</h3>
Hope this helps you
Answer:
160m/s
Explanation:
To find V Use the following formula V= F*W
V= Velocity F= Frequency W= Wavelength
V=20*8
=160m/s
<h2>
Question</h2>
I think the actual question should say "What is true of most body cells except skin cells?" I found this on another source.
Answer:
B
Explanation:
A is false for all cell types. In every cell, genes are organised into chromosomes in the same way. However, the way they are expressed is different between different cells.
C - is false for all cell types - all cells contain the same chromosomes with the same genes.
D - is false. All cells contain the same chromosomes and genes, it is the expression patterns of the genes that direct cell identity.
B is true, each body cell contains the same genes and chromosomes. The only exception is the sex chromosomes, which are haploid and genetically unique. This means that when fertilisation occurs following sexual reproduction, the diploid state is restored and a genetically unique organism is created.