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kow [346]
3 years ago
11

What does the color red means

Chemistry
2 answers:
rosijanka [135]3 years ago
4 0
Danger, love or blood hehe
Luden [163]3 years ago
3 0
Danger, or some people look at it as love 
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Help with this question plz
Triss [41]
Increase, because you need heat to melt a solid to a liquid, so the temperature will have to get greater.
6 0
3 years ago
you have a solution of water and salt. if the total solution weighs 50 grams and the salt weighs 4 grams. what is the percent co
Natali5045456 [20]

Answer:

92%

Explanation:

I believe. Hope this was helpful.

8 0
3 years ago
Determine the total mass of ethanol produced when 279. Grams of glucose rescts completely to form ethanol and 132 grams of carbo
Sergio039 [100]
279 g * (1 mol/180.559g glucose) * (2 mol ethanol/1 mol glucose) * (46.068g ethanol/1mol) =

142 g ethanol produced
5 0
3 years ago
A 0.5376 g sample of an unknown compound is found to contain 0.3044 g of carbonate. Could this compound be calcium carbonate?
shepuryov [24]
Calcium carbonate has the formula: CaCO3
From the periodic table:
mass of calcium = 40 grams
mass of carbon = 12 grams
mass of oxygen = 16 grams
Therefore,
molar mass of CaCO3 = 40 + 12 + 3(16) = 100 grams
molar mass of carbonate = 12 + 3(16) = 60 grams

One mole of calcium carbonate contains one mole of carbonate. Therefore, 100 grams of CaCO3 contains 60 grams of CO3.
If the 0.5376 grams of the unknown substance is CaCO3, then the amount of carbonate will be:
amount of carbonate = (0.5376*60) / 100 = 0.32256 grams

Based on the above calculations, the sample is not CaCO3
6 0
3 years ago
Describe how a chemical change follows the law of conservation of matter.<br> give examples pls
Paha777 [63]

Explanation:

In any chemical change, one or more initial substances change into a different substance or substances. ... According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change

Example:

The carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change.

5 0
2 years ago
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