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4 years ago

What happens to the motion of molecules when temperature decreases

Chemistry

2 answers:

maks197457 [2]4 years ago

5 0

When the temperature decreases the molecules slow down

Juliette [100K]4 years ago

4 0

Answer:

As the temperature of a solid, liquid or gas increases, the particles move more rapidly.

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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl ( aq ) , as describe

Nataly [62]

Answer:

0.9483 grams of manganese dioxide should be added to excess HCl.

Explanation:

Pressure of the chlorine gas = P = 795 Torr = 1.046 atm (1 atm = 760 Torr)

Volume of the chlorine gas = V = 255 ml = 0.255 L

Temperature of the chlorine gas = T = 25°C= 298.15 K

Moles of chlorine gas = n

Using ideal gas equation:

PV = nRT

$n=\frac{PV}{RT}=\frac{1.046 atm\times 0.255 L}{0.0821 atm l/mol k\times 298.15 K}$

n = 0.01090 mol

$MnO_2 ( s ) + 4 HCl ( aq)\rioghtarrow MnCl_2 ( aq ) + 2 H_2O ( l ) + Cl_2 ( g )$

According to reaction , 1 mole of chlorine gas is obtained from 1 mole of manganese dioxide.

Then 0.01090 moles of chlorine gas will be obtained from:

$\frac{1}{1}\times 0.01090 mol=0.01090 mol$ manganese dioxide

Mass of 0.01090 moles of manganese dioxide:

0.01090 mol × 87 g/mol = 0.9483 g

8 0

3 years ago

8)__MgCl2 +<br> Li2CO3 →<br> _MgCO3 +<br> LiCl Reaction Type:_<br> TT

Studentka2010 [4]

Reaction type : Double-Replacement reactions

<h3>Further explanation</h3>

Given

Reaction

MgCl2 + Li2CO3 → MgCO3 + LiCl

Required

Balanced equation

Reaction type

Solution

Balanced equation

Li2CO3 (s) + MgCl2 (aq) → MgCO3 (s) + 2 LiCl (aq)

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

To predict whether this reaction can occur or not is one of them, the precipitation reaction.

MgCO3 is a precipitation compound

7 0

3 years ago

Explanation of electron configuration

MrRissso [65]

Answer:

the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals

Explanation:

6 0

3 years ago

If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? (1 point)

Simora [160]

Answer:

There is an extra O2 molecule left over

Explanation:

3 0

3 years ago

What is 0.00034 in exponential form

Verizon [17]

Answer:

3.4 × 10 ^− 4

Explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

7 0

3 years ago