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Citrus2011 [14]
3 years ago
15

Why do electrons enter the 4s orbital before entering the 3d orbital?

Chemistry
2 answers:
LUCKY_DIMON [66]3 years ago
8 0
C. Because as it get farther from the nucleus the amount of energy is decreasing
salantis [7]3 years ago
7 0

Answer:

C. because the 4s orbital is at a lower energy level

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A beaker contains 500 ml of 2.40M KNO3 the beaker is left uncovered so that all of the water evaporates. What mass of KNO3 cryst
telo118 [61]

Answer:

242.4 g

Explanation:

RAM of KNO3=39+14+(16×3)=101

Mass=morality×RAM

101*2.4=242.4

6 0
3 years ago
Which type of stoichiometric calculation does not require the use of the molar mass?
Marianna [84]
The choices can be found elsewhere and as follows:

a. mass-mass problems 
<span>b. mass-volume problems </span>
<span>c. mass-particle problems </span>
<span>d. volume-volume problems
</span>
I believe the correct answer is option D. It is volume-volume problems that does not require the use of molar mass. <span> Here you are dealing with molarities and volumes to determine concentrations. Molar mass is not part of any calculations.</span>
6 0
3 years ago
Read 2 more answers
Can someone plz help me im running out of time !!!!
ankoles [38]

Answer:

1. C(2)+H2(1) -> C2H6(1)

2. NH3(2)+O2(3)-> HCN(2)+H2O(3)

I am not sure about the second one.

5 0
2 years ago
You have a 1.153 g sample of an unknown solid acid, HA, dissolved in enough water to make 20.00 mL of solution. HA reacts with K
seropon [69]

Answer:

HA +  KOH  →  KA  +  H₂O

Explanation:

The unknown solid acid in water can release its proton as this:

HA  +  H₂O  →  H₃O⁺  +  A⁻

As we have the anion A⁻, when it bonded to the cation K⁺, salt can be generated, so the reaction of HA and KOH must be a neutralization one, where you form water and a salt

HA +  KOH  →  KA  +  H₂O

It is a neutralization reaction because H⁺ from the acid and OH⁻ from the base can be neutralized as water

7 0
3 years ago
Yucca moths lay eggs in yucca flowers. When the eggs hatch, the larvae eat yucca seeds. The moths help pollinate the flowers. Wh
liberstina [14]
A. Mutualism. This is because both the larvae and the flower are benefited. The larvae is fed, and the flower is pollinated.

Hope this helps!
8 0
3 years ago
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