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n200080 [17]
3 years ago
13

What is the displacement of the particle in the time interval 7 seconds to 8 seconds?

Chemistry
1 answer:
3241004551 [841]3 years ago
8 0

Answer:

28 is great.......... it should be snSwer

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How do you identify the group and period number of an element with example
11Alexandr11 [23.1K]

The period is equal to the number of shells present in an atom.

The group number is equal to the number of valence electrons.

<h3>What is the period in the periodic table?</h3>

A period in the periodic table is a row of chemical elements.

The horizontal rows (which Mendeleev called series) are called periods and the vertical columns, are groups.

Elements having similar outer electronic configurations in their atoms are arranged in vertical columns.

The period indicates the value of n for the outermost or valence shell. The period is equal to the number of shells present in an atom. To find a period, the no. of shells =no. of periods.

Example: Na- 2,8,1 - Three shells are there, so period no. is 3.

Calcium - 2,8,8,2 - Four shells are there, so period no. is 4.

To determine the group, we need to understand some rules:

1. If the element is in s block, then the group number is equal to the number of valence electrons.

Example: Mg(12) - 2,8,2

Group = no. of valence electrons = 2

2. If the element is in the p block, then the number of the group can be determined by the formula: (number of valence electrons + 10).for groups.

Example: S(16) - 2,8,6

Group = no. of valence electrons+ 10 = 6+ 10 = 16

3. If the element is in the d block, then the number of the group can be determined by the formula: number of electrons in(n−1)d subshell + (number of electrons in (n)s subshell).

Example: Fe(26):

[Ar]3d^64s^2

Group = number of electrons in(n−1)d subshell + (number of electrons in (n)s subshell) = 6+2 = 8

4. If the element is in the f block, then the number of the group is always 3.  Example: Cerium (58) belongs to the 3rd group.

Learn more about the period in the periodic table:

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6 0
2 years ago
A student states that this structural formula represents a hydrocarbon.
goblinko [34]
.
the answer is Yes, a hydrocarbon is any compound that contains hydrogen and oxygen.

5 0
3 years ago
What eventually happens to a gas if its pressure is increased?
gulaghasi [49]

Answer:

According to Boyle's law pressure of a particular amount of gas is inversely proportional to the volume of the gas. So, when we increase the pressure of the gas the volume of the gas decrease and the gas start to condense.

Explanation:

3 0
2 years ago
PLEASE HELPPPPPPPPPPPPP
aleksandr82 [10.1K]

Empirical formula of the Cyclopropane = CH_{2}

Molecular formula  of the Cyclopropane = C_{3} H_{6}

Cyclopropane is a cyclic compound having 3 carbon atoms in a ring.

As we know carbon is having 4 valency, that means it can form 4 bonds with other atoms.

In case of cyclopropane each carbon atom is attached with 2 carbon atoms in a ring, so 2 valency of each carbon atom is used in a ring formation.

The remaining 2 valency are satisfied by hydrogen atoms.

Here, 3 carbons are there so 6 hydrogens are used to satisfy their valency.

An empirical formula is a simple representation of ratio of the atoms present, while a molecular formula is a detailed representation of the total number of atom.

So here, carbon and hydrogen ratio is 1:2 , from this the Empirical formula of the Cyclopropane became CH_{2}

And the molecular formula of  the Cyclopropane is C_{3} H_{6}.

Learn more about molecular formula here...

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6 0
2 years ago
Hypothesize why carbohydrates are found in plant cell walls
kap26 [50]

Answer:

Plants can split starch into it's simpler glucose units for use as energy when needed. Cellulose is known as a structural carbohydrate because of the fibers formed by it's molecules. It is the major component of plant cell walls and comprises over half of the carbon found on planets.

Explanation:

I majored in Chemistry

8 0
2 years ago
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