Answer:the term 'atom' in chemistry represents the basic unit of matter that normally exists in a free state and contains all chemical properties. It is an infinite particle that clearly identifies a chemical element. It consists of a positively charged nucleus and is surrounded by negatively charged electrons.
An ion or charge is an atom or group of atoms that has lost or gained one or more electrons. An ion that has a negative charge, when it gains one or more electrons, is called an anion or negative charge, and an ion that has a positive charge when it loses one or more electrons, is called a cation or positive charge.
Explanation:
Answer:
Similarities: both state the mass of chemical species and they have the same numerical value
Differences: molecular mass refers to one single molecule and molar mass refers to one mole of a molecule
Explanation:
The molecular mass is the value of the mass of each molecule and it is measured in mass units (u). It is calculated adding the mass of each atom of the molecule.
The molar mass is the value of the mass of one mole of molecules, which means the mass of 6.022140857 × 10²³ molecules. The unit is g/mol.
For example, we can consider the methane molecule, which has the chemical formula of CH₄:
Molecular mass CH₄ = C mass + 4 x (H mass)
Molecular mass CH₄ = 12.01 + 4 x (1.01)
Molecular mass CH₄ = 16.05 u
Now to calculate the molar mass we multiply the value of the molecular mass by the Avogadro number and convert the units to g/mol:
Molar mass CH₄: 16.05 x 
x 6.022140857 × 10²³ mol⁻¹
Molecular mass CH₄ = 16.05 g / mol
Answer:
Part A = The mass of sulfur is 6.228 grams
Part B = The mass of 1 silver atom is 1.79 * 10^-22 grams
Explanation:
Part A
Step 1: Data given
A mixture of carbon and sulfur has a mass of 9.0 g
Mass of the product = 27.1 grams
X = mass carbon
Y = mass sulfur
x + y = 9.0 grams
x = 9.0 - y
x(molar mass CO2/atomic mass C) + y(molar mass SO2/atomic mass S) = 22.6
(9 - y)*(44.01/12.01) + y(64.07/32.07)
(9-y)(3.664) + y(1.998)
32.976 - 3.664y + 1.998y = 22.6
-1.666y = -10.376
y = 6.228 = mass sulfur
x = 9.0 - 6.228 = 2.772 grams = mass C
The mass of sulfur is 6.228 grams
Part B
Calculate the mass, in grams, of a single silver atom (mAg = 107.87 amu ).
Calculate moles of 1 silver atom
Moles = 1/ 6.022*10^23
Moles = 1.66*10^-24 moles
Mass = moles * molar mass
Mass = 1.66*10 ^-24 moles *107.87
Mass = 1.79 * 10^-22 grams
The mass of 1 silver atom is 1.79 * 10^-22 grams
<h3>
Answer:</h3>
1.75 L HNO₃
<h3>
Explanation:</h3>
We are given;
Molarity of HNO₃ as 0.250 M
Mass of NaOH as 17.5 g
Volume of NaOH = 350 mL
We are required to calculate the volume of 0.250 M
We are going to first write the balanced reaction:
NaOH(aq) + HNO₃(aq) → NaNO₃(aq) + H₂O(l)
Then, we calculate the number of moles of NaOH
Moles = Mass ÷ Molar mass
Molar mass of NaOH = 39.997 g/mol
= 17.5 g ÷ 39.997 g/mol
= 0.4375 moles
We can now calculate the number of moles of HNO₃ using the mole ratio from the equation;
Mole ratio of NaOH to HNO₃ is 1 : 1
Therefore, if moles of NaOH are 0.4375 moles then;
Moles of HNO₃ will also be 0.4375 moles
We can now calculate the volume of HNO₃
Morality = Number of moles ÷ Volume
Thus;
Volume = Number of moles ÷ Molarity
= 0.4375 moles ÷ 0.250 M
= 1.75 L
Therefore, the volume of HNO₃ is 1.75 L
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