The density of a 129.5-gram sample of bronze that has a volume of 14.8 cubic centimeters 8.75 g/cm³.
the data is given as follows :
mass of sample of bronze = 129.5 g
the volume of the sample is = 14.8 cm³
The density formula is given as :
Density = mass / volume
Density = 129.5 g / 14.8 cm³
Density = 8.75 g/cm³
Thus, A method used by ancient Egyptians to obtain copper metal from copper(I) sulfide ore was heating the ore in the presence of air. Later, copper was mixed with tin to produce a useful alloy called bronze. the density of the bronze sample is 8.75 g/cm³.
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how to determine whether each of the following compounds is ionic, covalent, or acidic. then write the name for each compound.
Ionic compound: Metal + Nonmetal (usually)
Ionic compound: metal + polyatomic ion (usually)
Covalent compound: Nonmetal + Nonmetal (usually)
covalent compound: hydrogen and a nonmetal (usually)
How can a substance be recognized as an acid?Acid: An chemical molecule is referred to as an acid when it dissolves in water or reacts with other chemicals to produce H+ ions. such as hydrochloric acid. H+ ions are produced in this chemical reaction by HCl. Thus, it is an acid.
What clues do the name and formula of an acid provide?In general, hydrogen comes first in the formula for an acid. If an acid only contains two components, it is known as hydro- -ic acid. Hydrochloric acid is an example of HCl. And HBr is the chemical formula for hydrobromic acid.
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A 20.00 mL sample of aqueous oxalic acid, H2C2O4 was titrated with a 0.09113 M solution of
potassium permanganate, KMnO4:
2????????????4- ( (????????) + 5 H2????2????4 (????????)+ 6 H+ (????????) → 10 ????????2(????) + 2 ????????2+ (????????) + 8 H2???? (ℓ)
A volume of 23.24 mL was required to reach the end point. What is the oxalic acid molarity?
The molarity of the oxalic acid solution titrated with the potassium permanganate solution is 0.053 M
To determine the molarity of the solution, stoichiometric relationships and rules of three are used.
Balanced equation of the reaction2 KMnO4 + H2C2O4 → 2 CO2 + K2O + 2 MnO3 + H2O
Determination of moles of KMnO4 usedIf there are 0.09113 mol of KMnO4 in 1 liter of solution then in 0.2324 liters there are:
X moles of KMnO4 = 0.02324 x 0.09113 x 1
X moles of KMnO4 = 0.0021 mole
Stoichiometric calculation of moles of oxalic acidIf 2 mol KMnO4 combines with 1 mol H2C2O4 then 0.0021 mol KMnO4 combines with:
X mol H2C2O4 = 0.0021 mol KMnO4 x 1 mol / 2 mol KMnO4
X mol H2C2O4 = 0.0021 x 1 / 2 = 0.001 mol
Calculation of the molarity of the oxalic acid solutionIf there are 0.001 mol H2C2O4 in 0.02 liters of solution then in 1 liter there are:
X mol H2C2O4 = 1 x 0.001 / 0.02 = 0.053
Therefore, the molarity of H2C2O4 is 0.053M
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What Is a Homogeneous Mixture? Definition and Examples
A homogeneous mixture is one that has a consistent chemical make-up. Homogeneous mixtures have only one phase, according to their definition, composition, and characteristics.
Examples. A combination with a uniform composition is said to be homogenous. Because the particles are distributed evenly, these mixtures have a consistent composition. There is only one phase to them. They are made up of molecular or atomic level ingredients and do not divide into layers. In colloquial words, homogeneous mixes are frequently referred to as solutions. The example that follows is one of the simplest. dissolve sugar in water. A homogenous mixture is a combination of ingredients combined so thoroughly that the separate ingredients are invisible. There will be the identical amounts of each ingredient in every sample of the mixture. Mixtures that are homogeneous can be solid, liquid, or gaseous.
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