compound or mixture
There is not enough information given to unambiguously answer the question.A "pebble" is a small piece of rock. What KIND of rock? It matters. Is it a brimstone pebble? Then it's an element. Is it a limestone pebble? Then it's a compound. Is it a granite pebble? Then it's a mixture.
A pure substance is made out of only one kind of element (for example, gold is a pure substance). A mixture is made out of two or more different substances and is only combined by physical means. A pure substance cannot be broken down into a simpler substance. A mixture can be separated into its component parts.
A pure substance is a homogeneous chemical substance which means its composition is constant and its properties are consistent too. Some examples of this kind of substances are water, baking soda and sucrose.
its a mixture as we can separate it by chromatography
Oh, dude, air is a mixture of different gases, like oxygen, nitrogen, and a sprinkle of other stuff. So, technically, it's not a compound or an element, it's just like a big ol' blend of gases hanging out together. So, yeah, air is kind of like a gas smoothie, if you will.
A mixture
a mixture is not a substance
A homogeneous mixture can sometimes be hard to distinguish from a compound because the components are evenly distributed throughout the mixture, making it appear like a single substance. This is in contrast to a heterogeneous mixture where the components are not evenly distributed and can be easily differentiated.
A mixture is a substance composed of two or more components physically combined. An element is a pure substance composed of one kind of atom. A compound is a pure substance formed when atoms of two or more elements chemically combine.
A homogeneous mixture, such as a solution, can sometimes be difficult to distinguish from a compound because in both cases the components are uniformly mixed at the molecular level.
Substance refers to a particular kind of matter with uniform properties, such as an element or compound. It is a fundamental concept in chemistry and is often categorized as either a pure substance or a mixture.
eggshell is a kind of compound CaCO3 (calcium carbonate)
It's a substance
No, it's a pure compound (at least, it can be; sugar you buy at the grocery store might not be absolutely pure). Chemically speaking "sugar" is a class of compounds. There are lots of different sugars: sucrose (this is cane sugar, the grocery store kind), glucose (blood sugar), maltose (malt sugar), galactose and lactose (sugars found in milk), fructose (fruit sugar), and many others (you may have noticed a pattern: the names of sugars tend to end with -ose). Yes Sugar is a mixture
No. Pure water is a compound and therefore a pure substance
because a mixture is matter that contains more than one kind of particles and an compound is a pure substance made of two or more different elements that are chemically combined. and air is not a pure substance it is H2O two hydrogen's and one oxygen so it is not pure subsatnce UR WELCOME!
a compound