1 answer:
Answer:
The answer to your question is: A and C are elements. Substance D is a compound.
Explanation:
We know that A and C cannot be broken down into anything simpler then we conclude that they are elements.
Also know that B is composed by A and D and are not chemically bonded, so we conclude that B is a mixture
Finally, D can be decomposed into A and C, so it's a compound.
The only possible answer is the last one.
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<span>Ka is an equilibrium constant for the partial ionization of "weak" acids in water.</span>
Answer:
oh I'm here thanks for your points
Blue litmus paper turns red in the presence of an acid. Therefore, it can be assumed that the substance in the beaker is an acid.
Acids have a pH level of less than 7. Consequently, it can be assumed that the substance has a pH level less than 7.
Answer:
i will do a joke... hmmm...
Explanation:
why did the nurse need a red pen?
To draw out blood. lol
