Which statement is true about sand and baking soda? both are mixtures. both are pure substances. sand is a mixture and baking soda is a pure substance. sand is a pure substance and baking soda is a mixture.

The correct answer is Both are mixtures.

Explanation:

Sand and sodium bicarbonate are mixtures of pure substances. In the sand, we can find substances such as silica, usually in the form of quartz, ground limestone, iron, and others. Sodium bicarbonate is composed of pure substances Carbon and Sodium.

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specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.