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2 years ago

What is 0.00000005 in scientific notation, rounded to two significant figures?

Chemistry

1 answer:

KIM [24]2 years ago

7 0

Answer:

5×-10^8

That is the the scintific notation for 0.00000005

Answer=5×-10^8

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For the reaction PCl5(g) 4 PCl3(g) 1 Cl2(g) Kp 5 23.6 at 500 K a. Calculate the equilibrium partial pressures of the reactants a

ollegr [7]

Answer: $Cl_2$ = 42.9 atm, $PCl_3$ = 93.4 atm and $PCl_5$ = 7.66 atm

Explanation: The given balanced equation is:

$PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)$

$K_p=523.6$

Initial pressure of $PCl_5$ = 50.560 atm

initial pressure of $PCl_3$ = 50.500 atm

Let's say the change in pressure is p. Then:

equilibrium partial pressure of $PCl_5$ = (50.560 - p) atm

equilibrium partial pressure of $PCl_3$ = (50.500 + p) atm

equilibrium partial pressure of $Cl_2$ = p atm

$K_p=\frac{(PCl_3)(Cl_2)}{PCl_5}$

Let's plug in the values in it:

$523.6=\frac{(50.500+p)(p)}{50.560-p}$

on cross multiply:

$26473.216-523.6p=50.500p+p^2$

on rearranging the above equation:

$p^2+574.1p-26473.216=0$

It's a quadratic equation. On solving this equation:

p = 42.9

So, the equalibrium partial pressure of $Cl_2$ = 42.9 atm

equilibrium partial pressure of $PCl_3$ = 50.500 + 42.9 = 93.4 atm

equilibrium partial pressure of $PCl_5$ = 50.560 - 42.9 = 7.66 atm

6 0

2 years ago

Select all that apply. The requirements for one type of atom to substitute for another in a solid solution are:

stiks02 [169]

The correct answer is options c and e.

A solid solution is basically a multi-component framework that comprises a mixture of two or more elements exhibiting a similar crystal lattice. The examples of solid solutions are alloys.

The requirements for one kind of atom to substitute for another in a solid solution are:

1. The size of the atom must be similar.

2. The substituting atom must be from a similar group.

4 0

2 years ago

Read 2 more answers

Katie's teacher has asked her to identify an unknown

sleet_krkn [62]

The liquid freezes at 32 degrees celcius(A) is not the properties of water as water freezes at 0 degrees celcius

4 0

2 years ago

Which of the following describes a property of water that helps sustain marine life forms?

Mariana [72]

Answer:

Open spaces in water's solid structure makes its solid state less dense than its liquid state.

Explanation:

Water unlike other liquids is special. It contracts when cooled, down to a temperature of 4°C but thereafter begins to expand as it reaches 0°C and turns into ice.
This property is useful for the preservation of marine life in very cold temperatures. During winter, the surface water in water lakes and rivers starts cooling. Upon reaching the temperature of 4°C, the surface water descends to the bottom as it denser.
This help in the maintenance of temperature of the water at the bottom at 4°C. It is in this layer that marine life is sustained.

4 0

2 years ago

Question is chemistry:

Black_prince [1.1K]

H2S hydrogen sulfide gas has a higher lattice energy because

Formula: H2S

Molar mass: 34.1 g/mol

Boiling point: -76°F (-60°C)

Melting point: -115.6°F (-82°C)

Density: 1.36 kg/m³

Soluble in: Water, Alcohol

8 0

2 years ago