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2 years ago

The pressure of nitrogen gast at 35°C is changed from 0.89 atm to 4.3 atm. What will be its final temperature in Kelvin?

Chemistry

2 answers:

MA_775_DIABLO [31]2 years ago

8 0

Answer:

0.75 ATM. first option

SVETLANKA909090 [29]2 years ago

7 0

0.76 ATM i guess :///

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A student carefully placed 15.6 g of sodium in a reactor supplied with chlorine gas. When the reaction was complete, the student

BabaBlast [244]

Answer:

24.09 grams of chlorine gas reacted.

Explanation:

$2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)$

Moles of sodium chloride = $\frac{39.7 g}{58.5 g/mol}=0.6786 mol$

According to reaction, 2 moles of NaCl are formed from 1 mole chlorine gas.

Then 0.6786 moles of NaCl will be formed from;

$\frac{1}{2}\times 0.6786 mole=0.3393 mol$

Mass of 0.3393 moles of chlorine gas:

0.3393 mol × 71 g/mol = 24.09 g

24.09 grams of chlorine gas reacted.

5 0

3 years ago

The heat of fusion for water is the amount of energy that must be absorbed for water to _____.

ivanzaharov [21]

I would say A.evaporate because the water is getting absorbed.

4 0

2 years ago

Which statement describes the 3d, 4s, and 4p orbitals of Arsenic (As) based on its electronic configuration and position in the

tekilochka [14]

Answer:

The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.

Explanation:

8 0

2 years ago

describe how the current modern atomic theory and model differs from the model jj Thompson proposed ?

myrzilka [38]

J.J Thompson’s model shows a sphere with electrons that are moving around freely. However, Thompson’s model does not show protons or neutrons. The model that we have today gives a clearer structure showing protons, neutrons, and electrons inside an atom.

6 0

2 years ago

Some compounds are better known by their common names than by their systematic chemical names. Give the chemical formulas of the

kondaur [170]

Explanation:

(a) Dry ice is solid carbon dioxide and its chemical formula is solid $CO_{2}$ .

(b) Sodium chloride is commonly known as salt in daily life. Hence, chemical formula of salt is NaCl.

(c) Laughing gas is also known as dinitrogen monoxide. Hence, its chemical formula is $N_{2}O$ .

(d) Marble (chalk limestone) is chemically known as calcium carbonate. Hence, its chemical formula is $CaCO_{3}$ .

(e) Baking soda is chemically known as sodium bicarbonate. Hence, its chemical formula is $NaHCO_{3}$ .

(f) Ammonia has a chemical formula as $NH_{3}$ .

(g) Water has a chemical formula as $H_{2}O$ .

(h) Milk of magnesia is a base and it is chemically known as magnesium hydroxide. Its chemical formula is $Mg(OH)_{2}$ .

(i) Epsom salt is most often found as heptahydrate of sulfate mineral epsomite. Its chemical formula is usually $MgSO_{4}.7H_{2}O$ . If not present as a heptahydrate then its chemical formula is $MgSO_{4}.(H_{2}O)_{x}$ where, value of x can be equal to 0 to 7.

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2 years ago