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Fynjy0 [20]
3 years ago
7

CaCN2 + 3H20 - CaCO3 + 2NH3

Chemistry
1 answer:
ANTONII [103]3 years ago
6 0

Answer:3

Explanation:

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Which elements have atoms that are likely to form an anion?
KengaRu [80]
Answer:

Phosphorus, chlorine and selenium.

Explanation:

If you look at a periodic table, you will notice that phosphorus, chlorine and selenium are all in groups 15-17. Elements in these groups are more likely to gain electrons then they are to lose them, thus making them more likely to form an anion.
This is because they want to fill their outer valence shell of electrons so that they can have a full octet and for groups 15-17 it’s easier to gain 1-3 electrons then it is to loose 5-7 electrons.
5 0
3 years ago
. Fan blades would be an analogy for which atomic model?
ki77a [65]
The correct answer is C  electron cloud. 
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7 0
3 years ago
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What is a naturally occurring, solid mass of mineral or mineral-like matter?
Firdavs [7]

Rock is a combination of two or more minerals, and it does not possess any specific chemical composition. It is present naturally in the environment. Some examples of rocks are limestone, granite, etc.,Limestone may contain minerals like calcite and aragonite. Each mineral has a specific chemical composition with a well defined crystalline structure.

Therefore, the correct option would be a. rock as rock is the naturally occurring  solid mass made up of different types of minerals.

5 0
3 years ago
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Identify the term that matches each definition.
Nikolay [14]

Answer:

a. Volatile.

b. Air foil.

c. Sash.

d. Work surface.

Explanation:

In science, matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states.

Generally, matter exists in three (3) distinct or classical phases and these are;

I. Solid.

II. Liquid.

III. Gas.

Matching the terms with their respective definition, we have;

a. Volatile: A characteristic that describes substances that evaporate readily, producing large amounts of vapors.

b. Air foil: the front vent of a fume hood, which helps maintain proper air circulation.

c. Sash: the glass panel in front of the fume hood that shields the user from fumes and other hazards.

d. Work surface: the horizontal, flat area of a fume hood upon which experiments are carried out.

7 0
3 years ago
Explain how chemical change differs from a physical change
Grace [21]
A chemical change affects on the molecular level of matter, which makes it irreversible. Combustion is a pretty good exmple. Physical changes are reversible and dont alter the formula. Hope this helped!
8 0
3 years ago
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