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4 years ago

What type of rock would you be most likely to find a fossil. Explain why.

Chemistry

1 answer:

serious [3.7K]4 years ago

7 0

Sedimentary rocks because they are made of the remains of plants and animals which were compressed over time :)

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The properties of each state of a substance are due largely to the degree (amount) of intermolecular bonding.

Viktor [21]

Answer:

true

Explanation:

5 0

3 years ago

Read 2 more answers

What is the number of electrons shared between the atoms in a molecule of nitrogen, N2

Murljashka [212]

Answer:

3 electrons is contributed from each Nitrogen atom.

Total 6 electrons are shared in N₂.

Explanation:

Nitrogen is belong to group VA
it have 5 electron in its outer most Shell.
it need 3 electrons complete its octet to become stable.
Nitrogen have total 7 electrons.
its atomic number is 7

The electronic configuration of Nitrogen is as:

1s², 2s², 2p³

it exist in diatomic form standard temperature and pressure.

Nitrogen form covalent bond and share 3 electron from each side.

total 6 electron are shared between 2 nitrogen atom.

For Covalent bonding it can share its 3 electrons.

The diagrammatic representation is in attachment.

5 0

3 years ago

A compression, at a constant pressure of 140 kPa, is performed on 4.0 moles of an ideal monatomic gas (Cv = 3/2 R). The compress

kobusy [5.1K]

<u>Answer:</u> The change in internal energy of the gas is 29.414 kJ.

<u>Explanation:</u>

To calculate the temperature of the gas at different volumes, we use ideal gas equation:

$PV=nRT$

When volume = $0.26m^3$

We are given:

Conversion used: $1m^3=1000L$

$P=140kPa\\V=0.23m^3=260L\\n=4.0mol\\R=8.31\text{L kPa }mol^{-1}K^{-1}$

Putting values in above equation:

$140kPa\times 260L=4mol\times 8.31\text{L kPa }mol^{-1}K^{-1}\times T_i\\\\T_i=1095.06K$

When volume = $0.12m^3$

We are given:

$P=140kPa\\V=0.12m^3=120L\\n=4.0mol\\R=8.31\text{L kPa }mol^{-1}K^{-1}$

Putting values in above equation:

$140kPa\times 120L=4mol\times 8.31\text{L kPa }mol^{-1}K^{-1}\times T_f\\\\T_f=505.41K$

To calculate the change in internal energy, we use the equation:

$\Delta U=nC_v\Delta T=nC_v(T_f-T_i)$

where,

$\Delta U$ = change in internal energy = ?

n = number of moles = 4.0 mol

$C_v$ = heat capacity at constant volume = $\frac{3}{2}R$

$T_f$ = final temperature = 1095.06 K

$T_i$ = initial temperature = 505.41 K

Putting values in above equation, we get:

$\Delta U=4\times \frac{3}{2}\times 8.314J/K.mol\times (505.41-1095.06)\\\\\Delta U=29414.1J$

Converting this value in kilojoules, we use the conversion factor:

1 kJ = 1000 J

So, $29414.1J=\frac{1kJ}{1000J}\times 29414.1J=29.414kJ$

Hence, the change in internal energy of the gas is 29.414 kJ.

6 0

4 years ago

A cabbage p h indicator color key. entries are 0 to 2, bright red; 3 to 4, pink; 5 to 6, purple; 7, dark violet; 8 to 9, blue; 1

Ira Lisetskai [31]

We use a solution, such as a cabbage ph indicator, to measure the ph of household items :

to see if food went bad

to test the safety of water

to make sure conditions are safe

<h3>Cabbage ph indicator:</h3>

Anthocyanin, a water-soluble pigment found in red cabbage, can change color when combined with an acid or a basic. The color changes to red in situations with a pH under 7, and to bluish-green in alkaline (basic) environments with a pH above 7. Cabbage isn't known to cause acid reflux, but plenty of other common foods are.

Anthocyanin turns pink when it interacts with the hydronium ions in an acid, and blue or green when it interacts with the hydroxide ions in a base. Because it may inform us if a substance is acidic or basic by changing color, cabbage juice is referred to as a pH indicator.

Learn more about cabbage pH here:

brainly.com/question/9626174

#SPJ4

6 0

2 years ago

What is the oxidation number of hydrogen in each of the following species?

Keith_Richards [23]

Explanation:

d. H = -1

a. H = +1

b. H= +1

c. H = +1

e. H= 0

f. H= +1

4 0

3 years ago