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3 years ago

What is an example of how enginers contrbiuted to society

Chemistry

1 answer:

SpyIntel [72]3 years ago

8 0

Answer:

Engineers changed the world, such as building houses, bridges, and cars.

Please rate it the brainlist if this helped you and let me know if you have any questions, thanks

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What is required in order to melt a network solid?

mina [271]

Answer: In order to melt a network solid, a relatively large amount of heat is needed, sufficient to break the covalent bonds that hold the entire solid together

hope this helps

3 0

3 years ago

In which of the following cases will the LEAST time be required to arrive at equilibrium? K below refers to the equilibrium cons

mylen [45]

Answer: Option (4) is the correct answer.

Explanation:

It is known that equilibrium constant is represented as follows for any general reaction.

$A + B \rightarrow C + D$

K = $\frac{[C][D]}{[A][B]}$

As equilibrium constant is directly proportional to the concentration of products so more is the value of equilibrium constant more will be the number of products formed.

As a result, more is the time taken by the reaction to reach towards equilibrium. Whereas smaller is the value of equilibrium constant more rapidly it will reach towards the equilibrium.

Thus, we can conclude that cases where K is a very small number will require the LEAST time to arrive at equilibrium.

8 0

3 years ago

What will be the volume occupied by 2.5 moles of nitrogen gas exerting 1.75 atm of pressure at 475K?

Marina86 [1]

Answer:

THE VOLUME OF THE NITROGEN GAS AT 2.5 MOLES , 1.75 ATM AND 475 K IS 55.64 L

Explanation:

Using the ideal gas equation

PV = nRT

P = 1.75 atm

n = 2.5 moles

T = 475 K

R = 0.082 L atm/mol K

V = unknown

Substituting the variables into the equation we have:

V = nRT / P

V = 2.5 * 0.082 * 475 / 1.75

V = 97.375 / 1.75

V = 55.64 L

The volume of the 2.5 moles of nitrogen gas exerted by 1.75 atm at 475 K is 55.64 L

6 0

3 years ago

What is the formula of lead nitrate

monitta

Answer: Pb(NO3)2

Explanation:

5 0

3 years ago

Read 2 more answers

Which of the following is the balanced equation for P + O2 → P2O5? Question 3 options: A) 4P + O2 → 2P2O B) P + 5O2 → 2P2O5 C) 4

Luden [163]

Given equation:

P + O2 → P2O5

In order for the equation to be balanced, the stoichiometry of the atoms of one kind on the reactant side must be equal to that on the product

Reactants Products

P = 1 P = 2

O = 2 O = 5

The balanced equation would be:

4P + 5O2 → 2P2O5

Reactants Products

P = 4 P = 4

O = 10 O = 10

Ans: D)

4 0

3 years ago

Read 2 more answers