Answer: Most matter increases in volume when it gets hotter. ... This happens because the mass of the rod stays the same, but its volume increases. The increase in the volume of matter with increasing temperature is called expansion. When cooled down, most matter decreases in volume and increases in density.
Answer:
0.3097 moles of an nonionizing solute would need to be added.
Explanation:
Molal elevation constant =
Normal boiling point of ethanol =
Boiling of solution =
Moles of nonionizing solute = n
Mass of ethanol (solvent) = 47.84 g
Elevation boiling point:
n = 0.3097 mol
0.3097 moles of an nonionizing solute would need to be added.
Answer:
Boiling water breaks intermolecular attractions and electrolysis breaks covalent bonds.
Explanation:
When water boils, hydrogen bonds are broken between adjacent water molecules. The hydrogen bond is an intermolecular bond between adjacent oxygen and hydrogen atoms of water molecules.
During electrolysis, water dissociates in the presence of electric current. Here, ions are formed in the process. Therefore, covalent bonds are broken here.
Answer:
a. angiotensin II
Explanation:
Angiotensins are a set of peptide hormones that cause vasoconstriction and a subsequent increase in blood pressure, its main objective is to lower blood pressure.
Aldosterone is a hormone produced by the adrenal cortex that inhibits the level of sodium excreted in the urine, maintaining volume and blood pressure.
Nitric acid is a viscous and corrosive liquid that can cause severe burns in living things. It is used as a laboratory reagent and to make explosives such as nitroglycerin and trinitrotoluene, as well as fertilizers such as ammonium nitrate.
The atrial natriuretic peptide is a polypeptide and is related to the homeostatic control of body water, sodium, potassium and adipose tissue.
Answer:
958 g is the mass of LiOH that can react with all the CO₂
Explanation:
CO₂(g) + 2 LiOH(s) → Li₂CO₃(aq) + H₂O
We think in the reaction:
1 mol of carbon dioxide can react with 2 moles of lithium hydroxide.
First of all, we convert the mass of our reactant to mol:
880 g . 1mol /44g = 20 moles
As ratio is 1:2, 20 moles of CO₂ will react with 40 moles of LiOH.
Let's determine the mass:
40 mol . 23.95 g /1mol = 958 g