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3 years ago

Plzzz help 67 ponits !!!

Chemistry

2 answers:

mestny [16]3 years ago

3 0

What do you need help with?

Nostrana [21]3 years ago

3 0

ummm what do you need help with if it is someting i have to sign in i cant sorry plz till me :) :(

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What direction would this plate move? (the plate is gray in color)

strojnjashka [21]

Answer:

from south to north thats what it look like

Explanation:

7 0

3 years ago

A cylinder is filled with 10.0 L of gas and a piston is put into it. The initial pressure of the gas is measured to be 273. kPa.

Ann [662]

P2 = 54.6 kPa

Explanation:

Given:

V1 = 10.0 L. V2 = 50.0 L

P1 = 273 kPa. P2 = ?

We can use Boyle's law to solve this problem.

P1V1 = P2V2

Solving for P2,

P2 = (V1/V2)P1

= (10.0 L/50.0 L)(273 kPa)

= 54.6 kPa

5 0

3 years ago

What is the specific heat capacity of a metal if it requires 177.5 J to change the temperatures of 15.0g of the metal from 25.00

Vikentia [17]

Answer:

The specific heat capacity of a metal is 1.31 J/g°C = C

Explanation:

A classical excersise of calorimetry to apply this formula:

Q = m . C . ΔT

177.5 J = 15 g . C (34°C - 25°C)

177.5 J = 15g . 9°C . C

177.5 J /15g . 9°C = C

1.31 J/g°C = C

3 0

3 years ago

The reaction of hydrogen sulfide(g) with oxygen(g) to form water(l) and sulfur dioxide(g) proceeds as follows: 2H2S(g) 3O2(g)2H2

Aleks [24]

Answer: The value of $\Delta H$ is 1118 .

Explanation:

To calculate the number of moles, we use the equation:

$\text{Moles of solute}=\frac{\text{given mass}}{\text{molar mass}}$

$\text{Moles of} H_2S}=\frac{9.82g}{34.1g/mol}=0.288mol$

The balanced chemical reaction is:

$2H_2S(g)+3O_2(g)\rightarrow 2H_2O(l)+2SO_2(g)$

Given :

Energy released when 0.288 mole of $H_2S$ is reacted = 161 kJ

Thus Energy released when 2 moles of $H_2S$ is reacted = $\frac{161}{0.288}\times 2=1118kJ$

Thus the value of $\Delta H$ is 1118.

3 0

3 years ago

HEYYY FAM IS THIS RIGHT

Otrada [13]

Answer: A reversible reaction is a reaction that takes place in back and front directions. If the reaction were to reach equilibrium, the rate of forward direction would be equal to that of the reverse reaction.

Explanation:

Reversible reactions :

These are the reaction in which reactants reacts to give product and products reacts to give reactants as a product in return.

$A+B\leftrightharpoons C+D$

In above equation, 'A' and 'B' are reacting together to give 'C' and 'D', as products and vice-versa.
When the above reaction reaches equilibrium the rate of forward and backward reaction becomes equal.

3 0

3 years ago