Answer:
Atoms is the smallest unit of a chemical element and consist of three main components protons, neutrons, and electrons.
The number of a neutron is based on the difference between the mass number of the atom (M) and the atomic number (Z). every isotope of an element has a different number of neutron.
But in a neutral atom or average atom, the number of neutrons is equal to the number of protons and the number of electron.
Example of the number of neutrons in an average atom: In Nitrogen-14, the atomic number and the number of protons is 7, it means the number of neutrons will also 7.
<span>choices are:
Zirconium metal plus hydrogen chloride yields zirconium chloride solution and hydrogen gas
Xenon solid plus hydrochloric acid yields xenon chloride and hydrogen gas
Zinc metal plus hydrogen chloride yields zinc dichloride plus hydrogen gas
Zinc metal plus an aqueous solution of hydrochloric acid yields an aqueous solution of zinc chloride plus hydrogen gas
right ans is:
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Zinc metal plus an aqueous solution of hydrochloric acid yields an aqueous solution of zinc chloride plus hydrogen gas<span>
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A solute adds particles to a solution, such as:
NaCl-> Na+ + Cl- This puts 2 particles in the solution for every 1 formula unit of table salt. Any particle that gets added to a liquid interferes with the liquids ability to form crystals (ice), it interferes with the liquids ability to break surface tension ( boiling), and since less liquid molecules can escape there is less vapor pressure.
Addition of a solute means:
To freeze the solution you would have to slow the molecules down more than normal to encourage crystal growth, so the temp must be lowered.
To boil the solution you would have to speed the molecules up more than normal to encourage the molecules to leave the liquid, so the temp must be increased.
To increase the vapor pressure of the solvent has the same explanation as boiling.
Answer: 25g/ml
Explanation:
Density = 100.0g/ 4.0mL = 25g/mL
The balanced combustion reaction of octane ( which is a component of gasoline) can be written as:
C₈H₈ + O₂→ 8 CO₂ + 9 H₂O.
(a) For combustion of one mole of butane, moles of oxygen is required. So, for combustion of 1.60 mole of butane, Oxygen required is mole= 20 moles.
(b) On combustion of one mole of butane 8 moles of carbon dioxide (CO₂) is produced. Hence when 0.19 moles of butane is burnt, carbon dioxide produced is= 0.19 X 8 moles= 1.52 moles.
(c) Molar mass of butane is= (8 X12)+ (8 X 1)= 104 g/mol and molar mass of
O₂ is 32 g/mol.
As per balanced combustion reaction, to burn one mole butane or 104 g butane (25/2) mole of oxygen or (25X32)/2 g= 400 g O₂ is required. So to burn 1.15 g of butane the amount of oxygen required is= g= 4.42 g.