0
What else can I help you with?
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 color is calcium in its pure form?
In its pure form, calcium is a silvery, firm element which is rather malleable. From: http://www.wisegeek.com/what-is-calcium.htm
A sample is composed completely of gold absolutely free of impurities Which term or terms could be used to describe this sample?
The sample could be described as pure gold or 100% pure gold.
Why is a crystal of pure calcium carbonate made in a lab not a sample of the mineral calcite?
A crystal of pure calcium carbonate made in a lab is not a sample of the mineral calcite because calcite is a specific naturally occurring crystalline form of calcium carbonate with a distinct crystal structure and composition. Lab-made crystals may have different characteristics due to the manufacturing process and conditions, making them distinct from natural minerals like calcite.
Why would the mass of a sample containing calcium get larger after a reaction?
The mass of a sample containing calcium might get larger after a reaction due to the calcium reacting with elements or compounds in the environment to form new substances that add weight to the sample. This could include the addition of oxygen, sulfur, or other elements to the calcium during the reaction.
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 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 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.
What color is calcium in its pure form?
In its pure form, calcium is a silvery, firm element which is rather malleable. From: http://www.wisegeek.com/what-is-calcium.htm
Is calcium pure?
yes
Is calcium oxide pure?
no
What colour is calcium oxide?
Pure calcium oxide is white.
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.
A sample is composed completely of gold absolutely free of impurities Which term or terms could be used to describe this sample?
The sample could be described as pure gold or 100% pure gold.
Is calcium chloride and potassium chloride crystals in a beaker a pure substance?
Calcium chloride and potassium chloride are pure substances.
