Answer : Salt and Sand are weighed and kept in different 50 Milliliter beakers because, the experiment is about studying and separating the homogeneous mixture. As salt crystals are cubic and sand grains are rounded oblong grains. If we mix it together it would require a physical method to separate them. So, before starting the experiment it needs to be weighed in different beakers.
Density is typically the best way to determine the chemical property because almost always it is unique.
The oxygen in the final equation appears as reactant Upper O subscript 2 (g). Thus, option A is correct.
The chemical equations are the representation of the chemical formula involved in the equation as the reactant and the formed product.
<h3>What will be the form of oxygen?</h3>
The given chemical equations are:
The final chemical equation formed for the formation of Carbon dioxide is the sum of the two equations.
The final equation is achieved by substituting equation 1 in equation 2.
The oxygen in the final equation appears as reactant Upper O subscript 2 (g). Thus, option A is correct.
Learn more about the final equation, here:
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Answer:
Hydrogen and Oxygen
Pureified water has been filtered or processed to remove impurities like chemicals and other contaminants, while tap water is not and it is composed of minerals that may not be seen in purified water.
Chemicals are the most common type of water contaminants. They affect both surface and underground water bodies. Industries and farming activities are the leading cause.
Alcohol: Probable human mrcinogen
Arsenic: Skin hyperpigmentalion: oxidative stress;
peripheral neuropathy; bladden skin,
liver, lung, and lymphatic cancer
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminum
Silicon
Phosphorus and
Sulfur
