Answer:
1. which of the following is NOT an element.
a. ammonia
Why?
Ammonia, NH3, is a chemical compound composed of one nitrogen atom and three hydrogen atoms. Ammonia is a colorless gas that is lighter than air, and can be easily liquefied. Ammonia is a compound normally encountered as a gas and has a strong odor.
2.which of the following is an example of heterogeneous mixture?
c. the girl makes some sauce by mixing ketchup and mayonnaise
Why?
A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. ... A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers. Each of the layers is called a phase.
3. what is the variety of matter that can be a compound or element and has chemical property.
d. substance
Why?
Any sample of matter that has the same physical and chemical properties throughout the sample is called a substance. There are two types of substances.
4. what substance is chemically combined and made up of different kinds of atom?
b. element
Why?
An element is a chemical substance that is made up of a particular kind of atom and hence cannot be broken down or transformed by a chemical reaction into a different element. All atoms of an element have the same number of protons, though they may have different numbers of neutrons and electrons.
5. what do you call the matter that has two types which are the heterogeneous and homogeneous?
c. mixture
Why?
When two or more substances are mixed together, the result is called a mixture. Mixtures can be classified into two main categories: homogeneous and heterogeneous. A homogeneous mixture is one in which the composition of its constituents are uniformly mixed throughout.
Explanation:
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