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2 years ago

HELP ME OUT PLS!!!!!

Chemistry

1 answer:

RUDIKE [14]2 years ago

8 0

Answer:

Explanation:

Well Its called reaction force, so that helps you figure out what direction she would go towards. When you use anything that has reaction force what way are they normally going? So thats why she stayed still.

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In the activity, click on the E∘cell and Keq quantities to observe how they are related. Use this relation to calculate Keq for

inessss [21]

Answer:

The standard cell potential of the reaction is 0.78 Volts.

Explanation:

$Cu^{2+}(aq)+Fe(s)\rightarrow Cu(s)+Fe^{2+}(aq)$

Reduction at cathode :

$Cu^+(aq)+2e^-\rightarrow Cu(s)$

Reduction potential of $Cu^{2+}$ to Cu= $E^o_{1}=0.34 V$

Oxidation at anode:

$Fe(s)\rightarrow Fe^{2+}(aq)+2e^-$

Reduction potential of $Fe^{2+}$ to Fe= $E^o_{2}=-0.44 V$

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{red,cathode}-E^o_{red,anode}$

Putting values in above equation, we get:

$E^o_{cell}=0.34V -(-0.44 V)=0.78 V$

The standard cell potential of the reaction is 0.78 Volts.

3 0

3 years ago

A container holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 C. What is the volume of the container?

zhenek [66]

THE ANSWER

for solving this, we just use the formula of the equation of state

PV = n RT
where
P: pressure =10atm
V volume
n number of mole = 35.8 moles
R universal gas constant = 0.082
T: The temperature= 70°C= 343.15 Kelvin

therefore, for finding V
we have

V= (n RT) / P = 35.8 x 0.082 x 343.15 / 10 = 100.7 ≈ 101 L

the answer is V = 101L

3 0

4 years ago

Gold cylinder has a mass of 75 g and a specific heat of 0.129J/G degrees Celsius it is heated to 65°C and then put in 500 g of w

nadezda [96]

<h3>Answer:</h3>

89.88° C

<h3>Explanation:</h3>

<u>We are given;</u>

Mass of gold cylinder as 75 g
specific heat of gold is 0.129 J/g°C
Initial temperature of gold cylinder is 65°C
Mass of water is 500 g
Initial temperature of water is 90 °C

We are required to calculate the final temperature;

We know that Quantity of heat is given by the product of mass, specific heat capacity and change in temperature.

That is, Q = m × c × ΔT

<h3>Step 1: Calculate the quantity of heat absorbed by the Gold cylinder</h3>

Assuming the final temperature is X° C

Then; ΔT = (X-65)°C

Therefore;

Q = 75 g × 0.129 J/g°C × (X-65)°C

= 9.675X - 628.875 Joules

<h3>Step 2: Calculate the quantity of heat released by water</h3>

Taking the final temperature as X° C

Change in temperature, ΔT = (90 - X)° C

Specific heat capacity of water is 4.184 J/g°C

Therefore;

Q = 500 g × 4.184 J/g°C × (90 - X)° C

= 188,280 -2092X joules

<h3>Step 3: Calculate the final temperature, X°C</h3>

we know that the heat gained by gold cylinder is equal to the heat released by water.

9.675X - 628.875 Joules = 188,280 -2092X joules

2101.675 X = 188908.875

X = 89.88° C

Thus, the final temperature is 89.88° C

3 0

3 years ago

0 / 5 pts Question 3 In the reaction of aluminum with iron III oxide, if you start with 54.2 grams of aluminum, how many grams o

adelina 88 [10]

Could you please mark me as brainliest?

Answer: 160.40 g Fe2O3 are needed.

Explanation:

Balanced equation: 2 Al + Fe2O3 —> Al2O3 + 2Fe

54.2 g Al * 1 mol Al / 26.98 g Al * 1 mol Fe2O3 / 2 mol Al * 159.69 g Fe2O3 / 1 mol = 160.40 g Fe2O3 are needed.

3 0

3 years ago

Hat type of mixture is chicken noodle soup?

Lera25 [3.4K]

Heterogeneous mixture. cause you can separate the noodles from soup

4 0

3 years ago