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Alex17521 [72]
3 years ago
11

What happens when HCl gas is passed through a saturated PbCl2 solution?

Chemistry
2 answers:
Ugo [173]3 years ago
4 0

Answer:

When HCl is added to a saturated solution of PbCl2, the solubility of PbCl2 would decrease so precipitation would occur. The decrease in the solubility is due to the common ion effect or the presence of Cl- ions in both compounds.

sesenic [268]3 years ago
3 0

Answer:

Some PbCl2 precipitates because chloride ions are added to the solution.

Explanation:

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The speed of light in a vacuum is 2.998 × 10 8 8 m/s. How long does it take for light to circumnavigate the Earth, which has a c
svp [43]

Answer:- 0.134 seconds

Solution:- The speed is given as 2.988*10^8\frac{m}{s} and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.

We need to do unit conversion from miles to meter as the speed is given in meter per second.

1 mile = 1609.34 meter

So, 24900mile(\frac{1609.34meter}{mile})

= 40072566 meters

Know that, speed=\frac{distance}{time}

It's rearranged to time as, time=\frac{distance}{speed}

Let's plug in the values in it:

time=\frac{40072566meter}{2.988*10^8\frac{meter}{second}}

= 0.134 seconds

So, the light would take 0.134 seconds to travel the mentioned speed. The answer without the unit is 0.134.

8 0
3 years ago
Two objects of equal mass have a force of gravity of 6 N between them. Imagine the mass of one is cut in half and the other stay
Alenkasestr [34]

Answer:

F' = 3 N

Explanation:

Given that,

Two objects of equal mass have a force of gravity of 6 N between them.

If the mass of one is cut in half and the other stays the same such that,

m₁' = m₁ and m₂' = (m₂/2)

We need to find the new force. The gravitational force between two objects is given by :

F=G\dfrac{m_1m_2}{r^2}

We have, F = 6 N

New force,

F'=G\dfrac{m_1'm_2'}{r^2}\\\\F'=\dfrac{Gm_1\times \dfrac{m_1}{2}}{r^2}\\\\=\dfrac{1}{2}\times \dfrac{Gm_1m_2}{r^2}\\\\F'=\dfrac{F}{2}\\\\F'=\dfrac{6}{2}\\\\F'=3\ N

So, the new force becomes 3 N.

3 0
3 years ago
Identify six stages of the process of scientific inquiry (scientific method) and explain why the process is not a rigid sequence
I am Lyosha [343]
Purpose- state the problem
research- find out about the topic
hypothesis- predict the outcome of the problem
expiriment- develop a procedure to test the hypothesis
conclusions-compare the hypothesis t ok the outcome of the experiment
7 0
3 years ago
Please help me with this homework
PSYCHO15rus [73]

Answer:

1: Luis's train Traveled 100M per Second.

2: The swimmer's average speed was 3 meters per Second.

3: The average speed of the car is 4.58 m a second.

Explanation:

1: Divide 5000 by 50

2: Divide 300 by 100

3: Divide 550 by 120

7 0
3 years ago
A) Calculate the pH of a 1.8 * 10 -4 M HCl solution
Sergio [31]

Answer:-

A) 3.745

B) 2 x 10^-13 M [H+]

pOH = 1.3

Explanation:-

A) From the question we see

The strength of HCl solution = 1.8 x 10^-4 M.

The M stands for molarity which is moles / Litre.

HCl is a monobasic acid. So the number of moles of Hydrogen ion H+ HCl can give is the same as the value of it’s strength in moles per litre.

The hydrogen ion concentration [H+] is therefore 1.8 x 10^-4.

The formula for pH is

pH = - log [ H+ ]

= - log [1.8 x 10^-4]

= 3.745

B) From the question we see

The strength of KOH = 0.05 M

The M stands for molarity which is moles / Litre.

KOH is a monoacidic base. So the number of moles of Hydroxyl ion OH- KOH can give is the same as the value of it’s strength in moles per litre.

The Hydroxyl ion concentration [OH-] is therefore 0.05

The relation between [OH-] and [H+] is

[H+] x [ OH-] = 10^-14

[H+] = 10^-14 / [OH-]

= 10^-14/ 0.05

= 2 x 10^-13 M

Using the relation between pH and [OH-]

pOH = - log [OH-]

= -log [0.05]

= 1.3

7 0
3 years ago
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