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3 years ago

Define the following terms

Chemistry

1 answer:

sladkih [1.3K]3 years ago

7 0

Answer:

Chemical Family means a group of elements in the Periodic Table or, more commonly, compounds that share certain physical and chemical characteristics and have a common name.

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

metalloid is an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.

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A box contains 104 gas molecules, 2500 of nitrogen and 7500 of argon in thermal equilibrium. The molecular weight of N2 is 28g/m

LekaFEV [45]

Answer : The temperature of this gas will be, 206.9 K

Explanation :

The expression for the kinetic energy per molecule of monoatomic gas (argon) is:

$K.E_{argon}=n_{argon}\times \frac{3}{2}\times K_BT$ ...........(1)

The expression for the kinetic energy per molecule of diatomic gas (nitrogen gas) is:

$K.E_{nitrogen}=n_{nitrogen}\times \frac{5}{2}\times K_BT$ .............(2)

The total kinetic energy of the molecule will be,

$K.E_{Total}=K.E_{argon}+K.E_{nitrogen}$

Now put all the expression in this, we get:

$K.E_{Total}=(7500)\times \frac{3}{2}\times K_BT+(2500)\times \frac{5}{2}\times K_BT$

$T=\frac{K.E}{17500\times K_B}$

Now put all the given values in this expression, we get:

$T=\frac{5\times 10^{-17}J}{17500\times (1.381\times 10^{-23}J/K)}$

$T=206.9K$

Therefore, the temperature of this gas will be, 206.9 K

8 0

4 years ago

What block of the periodic table do transition metals belong to?

jenyasd209 [6]

Answer:

d-block

Explanation:

Many scientists describe a "transition metal" as any element in the d-block of the periodic table, which includes groups 3 to 12 on the periodic table. In actual practice, the f-block lanthanide and actinide series are also considered transition metals and are called "inner transition metals".

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3 years ago

Which of the following is NOT an example of how watersheds can change over time?

kow [346]

Answer:

D. Flooding occurs when too much rain falls upstream.

Explanation:

Flooding is not a change in a watershed.

A, B, and C are wrong. They all represent changes in a watershed.

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3 years ago

Is the kool-aid man the jar or the liquid?

nataly862011 [7]

Answer:

I think both

Explanation:

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4 years ago

What do you understand by shared pair of electron

PilotLPTM [1.2K]

Answer:Lone pairs are the valence electron pair of any element which do not take part in bonding but affect the shape of molecules. Bond pairs or shared pairs are the electron pair which does both affect the geometry of molecules and take part in chemical bonding. These are form due to sharing of electrons.

Explanation:

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3 years ago