A solution is a liquid, therefore limestone cannot be a solution.
Limestone could be considered a mixture, although it might be more proper to say that it is created from a mixture.
Neither. It is a compound made up of one calcium, one carbon, three oxygen.
Soduim is a pure substance. But it is a mixture because it was pshsically combined. Soduim is a pure substance. But it is a mixture because it was pshsically combined.
Neither. C2H2 is a compound (pure substance) so it is not a mixture at all. Hint: mixtures don't have chemical formulas.
No. Sulfur dioxide is a compound, which makes it a pure substance, not a mixture.
Seawater is a mixture. It is a combination of salt and water that is a homogeneous mixture. An example of a pure substance is either pure salt or pure sugar.
No, it is a mixture; rarely a drug is a pure substance.
No a mixture is by definition not a pure substance.
Just like granite, marble is a mixture. However, unlike granite, marble is typically more than 90% calcium carbonate, so it might count as a pure substance. Marble is a type of limestone, so is a mixture.
It is a mixture of substances
pure substance, propanone
rice pudding a pure substance or a mixture and is it a homogenous or heterogenous