A student combined water, sugar, and salt into a beaker.
Which of the following statements are true?
a. The individual substances can be separated by physical means.**
b. The individual substances cannot be separated by physical means.
c. A new substance is made of two or more elements chemically combined.
d. A new substance is made containing atoms that have been rearranged.
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6.)Table salt has the chemical formula NaCl. Table sugar has the chemical formula C12 H22 O11. Which of the following is true?
a) Both compounds are held together by chemical bonds. **
b) Both compounds have the same density.
c) Both compounds react with water.
d) Both compounds contain the element carbon.
a. The individual substances can be separated by physical means.
To determine which of the statements are true, let's analyze each statement:
a. The individual substances can be separated by physical means:
This statement is true. Water, sugar, and salt are all compounds that can be separated using various physical methods such as evaporation or filtration. By heating the solution, the water can be evaporated, leaving the sugar and salt behind. Then, by dissolving the remaining solid in water and filtering, the sugar can be separated from the salt.
b. The individual substances cannot be separated by physical means:
This statement is false. As mentioned earlier, the individual substances can indeed be separated by physical means, so this statement is incorrect.
c. A new substance is made of two or more elements chemically combined:
This statement is false. Mixing water, sugar, and salt together does not chemically combine them. The substances do not undergo a chemical reaction and retain their individual properties.
d. A new substance is made containing atoms that have been rearranged:
This statement is false. The mixing of water, sugar, and salt does not involve any rearrangement of atoms. The substances remain as water, sugar, and salt, and only their physical state changes when mixed together.
In conclusion, the only correct statement is option (a) - The individual substances can be separated by physical means.