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calcium is an element, so it is the pure substance.. it is a grey/silver. calcium is an element, so it is the pure substance.. it is a grey/silver.
Wiki User
∙ 16y ago
Wiki User
∙ 13y agocan not make a sample of calcium
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How many moles of CaCO3 is 73.4kg?
The formula mass of calcium carbonate, CaCO3 is 40.1 + 12.0 + 3(16.0) = 100.1Note that 73.4kg is equivalent to 73400g.Amount of CaCO3 = mass of pure sample/molar mass = 73400/100.1 = 733molThere are 733 moles of calcium carbonate in a 73.4kg pure sample.
Is a sample of pure solid chromium is homogeneous?
A sample of any pure element is homogeneous.
How many moles are in 7.4 kilogram of calcium bromide?
That is a lot of calcium bromide we are dealing with. The formula mass of calcium bromide, CaBr2 is 40.1 + 2(79.9) = 199.9.Amount of CaBr2 = (7.4 x 1000)/199.9 = 32.0mol There are 32 moles of calcium bromide in a 7.4kg pure sample.
Is calcium a pure substance?
Yes. Calcium is an element, and it has the atomic number 20 and Ca is its chemical symbol. It is a metal, and one of the alkali earth metals which are the elements in Group 2 of the periodic table. It is reactive, and as such is not found free in nature, but always appears in compounds with other elements. Wikipedia has additional information, and a link is provided.
What criterion is used for the purity of a sample of caffeine?
The closer the melting point of the sample of the caffeine you have extracted, to the known melting point of pure caffeine, the more pure your sample is.
How do you make pure samples of caclium?
The most straightforward way to make a pure sample of calcium is to electrolyze a molten calcium salt with an "inert" cathode such as platinum. Considerable care is required to prevent reaction of pure calcium with the ambient atmosphere.
How many moles of CaCO3 is 73.4kg?
The formula mass of calcium carbonate, CaCO3 is 40.1 + 12.0 + 3(16.0) = 100.1Note that 73.4kg is equivalent to 73400g.Amount of CaCO3 = mass of pure sample/molar mass = 73400/100.1 = 733molThere are 733 moles of calcium carbonate in a 73.4kg pure sample.
How many moles of calcium carbonate are in 1.719 grams?
Calcium carbonate, CaCO3 has formula mass of 40.1+12.0+3(16.0) = 100.1Amount of CaCO3 = 1.719/100.1 = 0.0172molThere are 0.0172 moles of calcium carbonate in a 1.719 gram pure sample.
Is a sample of pure solid chromium is homogeneous?
A sample of any pure element is homogeneous.
How many moles are in 7.4 kilogram of calcium bromide?
That is a lot of calcium bromide we are dealing with. The formula mass of calcium bromide, CaBr2 is 40.1 + 2(79.9) = 199.9.Amount of CaBr2 = (7.4 x 1000)/199.9 = 32.0mol There are 32 moles of calcium bromide in a 7.4kg pure sample.
Is calcium oxide is a pure substance?
Yes. Calcium oxide is a compound which is a type of pure substance.
Is calcium oxide a pure substances?
Yes. Calcium oxide is a compound which is a type of pure substance.
Is calcium a pure substance?
Yes. Calcium is an element, and it has the atomic number 20 and Ca is its chemical symbol. It is a metal, and one of the alkali earth metals which are the elements in Group 2 of the periodic table. It is reactive, and as such is not found free in nature, but always appears in compounds with other elements. Wikipedia has additional information, and a link is provided.
Is calcium pure?
yes
Is calcium oxide pure?
no
How do you make a pure sample of fluorine?
No you cannot make a pure sample of Fluorine because it is an earth made element.
What colour is calcium oxide?
Pure calcium oxide is white.
