Answer:
65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large
deposit of dust that contained substances only found in asteroids, What most likely killed off the dinosaurs?
Explanation:
Answer : The concentration of the 
is, 0.115 M
Explanation :
Using dilution law,
where,
= basicity of an acid = 1
= acidity of a base = 1
= concentration of 
= 0.125 M
= concentration of KOH = ?
= volume of = 25 ml
= volume of NaOH = 27.07 ml
Now put all the given values in the above law, we get the concentration of the .
Therefore, the concentration of the is, 0.115 M
Answer:
I believe your answer is B) make a prediction
Explanation:
The difference between all three Magnesium, Mg isotopes is in; the number of neutrons.
<h3>What is
isotopy?</h3>
Isotopy is a property of elements in which case the element has two or more types of atoms that have the same atomic number and hence, same position in the periodic table, but differ in nucleon numbers due to different numbers of neutrons in their nuclei.
- Ultimately, the distinctive feature between the three isotopes is in their number of neutrons
Read more on isotopes;
brainly.com/question/14220416
According to the boiling point elevation formula:
ΔTb = i * Kb * m
- when i is the van't Hoff factor for sucrose = 1
as the sucrose is an organic molecule so, there is no dissociation in water so i = 1
- Kb is the ebullioscopic constant of the solvent (water) = 0.512°C Kg mol-1
- and when m is the molality = moles sucrose / Kg water
so, we need first to get moles sucrose = mass/molar mass
= 759 g / 342.3 g/mol
= 2.22 moles
∴ m = 2.22 moles / 0.3 Kg
= 7.4 mol/kg
by substitution on ΔTb:
∴ΔTb = 1 * 0.512 * 7.4
= 3.8
∴Tb = 100 °C + 3.8 = 103.8 °C
