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Darina [25.2K]
3 years ago
6

I think it’s D but I’m not sure.. Please help!

Chemistry
2 answers:
diamong [38]3 years ago
8 0

Answer:

D.

Explanation:

Weathering, erosion and deposition are processes that can wear a mountain down.

alisha [4.7K]3 years ago
7 0

Answer:   I think it’s D?

Explanation:

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A breakfast of cereal, orange juice, and milk might contain 230 nutritional Calories. How much is this in Joules?
Sophie [7]

Answer:

B

Explanation:

962,320 J

230 nutritional Calories in Joules is 962,320 J

4 0
2 years ago
What is the net ionic equation for the reaction that occurs when aqueous solutions of koh and zncl2 are mixed?
Mademuasel [1]

Answer:

Net ionic equation:

Zn²⁺(aq)  +   2OH⁻(aq)     →    Zn(OH)₂(s)

Explanation:

Chemical equation:

ZnCl₂ + KOH    →   KCl  + Zn(OH)₂

Balanced chemical equation:

ZnCl₂ + 2KOH    →   2KCl  +Zn(OH)₂

Ionic equation;

Zn²⁺(aq)  + 2Cl⁻(aq)  + 2K⁺(aq)  +  2OH⁻(aq)     →   2K⁺(aq)  + 2Cl⁻(aq)   +Zn(OH)₂(s)

Net ionic equation:

Zn²⁺(aq)  +   2OH⁻(aq)     →    Zn(OH)₂(s)

The K⁺  and Cl⁻  are spectator ions that's why these are not written in net ionic equation. The  Zn(OH)₂ can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

5 0
3 years ago
In the Periodic Table, what is the relationship between two elements that are placed side-by-side in a row?
marusya05 [52]
Answer is D. The periodic table rows are arranged by increasing atomic number. The atomic number is decided by how many protons they have.
5 0
3 years ago
The density of copper is 8.9 g/cm3.If you have 90.0 grams of copper ,how much volume is your copper occupying
lesya692 [45]
D= m/v
90.0/8.9
V= 10.11235
V= 10 cm3
5 0
3 years ago
URGENT.
Sergio [31]

Answer:

1. 72.9 atm

2. 0.43937 K

Explanation:

1. Gray- lussacs law is p1/t1=p2/t2 so we use this formula to figure it out by filling in the variables and solving

p1=45.0 atm

t1=323 K

p2= ?

t2=523 K

Now we fill in this in the formula and solve - 45.0 atm/ 323 K = p2/ 523 K

and now we solve for p2 by multiplying 535k by each side to give us p2

2. Using the same formula we get 10.0atm/? = 12.0 atm/ 273.15 k and we divide both sides by 10.0 atm

4 0
3 years ago
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