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zhuklara [117]
3 years ago
8

what would happen to an igneous rock exposed at the earth's surface? A.it would melt B.it would weather and erode C.it would cha

nge into a metamorphic
Chemistry
2 answers:
Alex17521 [72]3 years ago
8 0
Hey there,

Answer : C, It would change into a metamorphic

Hope this helps :D

<em>~Top♥</em>
sasho [114]3 years ago
3 0
It would erode if an igneous rock was at the center of the earth it would erode hope this helps

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1. calculate the the reaction of gas, F 2 (g) with H 2 O(l) water form and O 2 (e).
Sever21 [200]

hope this helped.:)

Explanation:

Yes, the number of moles of oxygen gas produced by your reaction under those conditions for pressure and temperature will be 0.0025.

Hydrogen peroxide,  

H

2

O

2

, decomposes to give water and oxygen gas according to the balanced chemical equation

2

H

2

O

2

(

a

q

)

→

2

H

2

O

(

l

)

+

O

2

(

g

)

You've collected 0.061 L of oxygen gas at 295.15 K and 1 atm, so you've got all the data you need to calculate the number of moles of oxygen gas produced by using the ideal gas law equation

P

V

=

n

R

T

⇒

n

=

P

V

R

T

n

O

2

=

1

atm

⋅

0.061

L

0.082

L

⋅

atm

mol

⋅

K

=

0.0025 moles

So, if this was your first question, then yes, your reaction produced 0.0025 moles of oxygen gas.

I find the second part of your question to be a little confusing. You were given the density of the hydrogen peroxide solution, so are you supposed to use that to determine the theoretical number of moles of oxygen for this reaction?

I'm not sure what  

100%

H

2

O

2

=

1.02 g/mL  

means, do you have a certain volume of hydrogen peroxide solution?

SIDE NOTE According to the additional information posted by Heather, it turns out that the initial hydrogen peroxide solution had a volume of 5 mL.

Even with the volume of the initial solution, you'd need its percent concentration to try and determine exactly how many moles you had present before the reaction.

Once you know how many moles of hydrogen peroxide you had, assume that all of the react and use the  

2

:

1

mole ratio that exists between  

H

2

O

2

and  

O

2

to get the number of moles of oxygen your reaction could have produced.

7 0
3 years ago
Calculate the pressure (in kpa) of 1.5 mole of helium gas at 354 k when it occupies a volume of 16.5l.
3241004551 [841]

Answer:

267.57 kPa

Explanation:

Ideal gas law:

PV = n RT        R = 8.314462    L-kPa/K-mol

P (16.5) = 1.5 (8.314462)(354)       P = 267.57 kPa

8 0
2 years ago
Fill in the blank for these q’s
kolezko [41]

Plant cells are rectangular or squarish in shape.

Plant cells have a large vacuole.

7 0
3 years ago
Read 2 more answers
Which isotope has the greatest number of protons?
tino4ka555 [31]

Answer:

The isotope with the greatest number of protons is:

  • <u>option D:  Pu-239, with 94 protons</u>

Explanation:

The number of <em>protons</em> is the atomic number and is a unique number for each type of element.

You can tell the number of protons searching the element in a periodic table and reading its atomic number.

Thus, this is how you tell the number of protons or each isotope

Sample       Chemical symbol  Element       atomic number   # of protons

A Pa-238       Pa                         protactinium         91                        91

B U-240         U                          uranium                 92                       92

C Np-238       Np                        neptunium            93                       93

D Pu-239        Pu                        plutonium              94                       94

8 0
3 years ago
exactly 1mol of n2o4 is placed in an empty 1 l container. if at equilibrium n2o4 is dissociated 20%, what is the value of equili
egoroff_w [7]

Answer:

K = 0.2

Explanation:

Based on the chemical dissociation of N₂O₄:

N₂O₄ ⇄ 2NO₂

The equilibrium constant, K, of the reaction is:

K = [NO₂]² / [N₂O₄]

Now, if 20% of N₂O₄ is dissociated, 80% remains as N₂O₄ = 0.8mol/L = 0.8M

as 20% is dissociated, 0.2moles of N₂O₄ were dissociated and 0.2*2 = 0.4mol/L of NO₂ are produced.

Replacing in K:

K = [0.4M]² / [0.8M]

<h3>K = 0.2</h3>
5 0
3 years ago
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