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kolezko [41]
3 years ago
14

Select all that apply. The electron configurations of some elements are given. Based on the electron configurations which elemen

ts can likely form ions with multiple charges? A. Zinc [Ar] 3d^10 4s^2 B. Iron [Ar] 3d^6 4s^2 C. Sodium [Ne] 3s^1 D. Cobalt [Ar] 3d^7 4s^2 E. Silver [Kr] 4d^10 5s^1
Chemistry
1 answer:
erma4kov [3.2K]3 years ago
8 0

Answer:

correct option: A and D

Explanation:

generally element from d block can for ion with multiple charge and having incomplete outershell means element do not have fullfiled or half filed orbital because in these case it takes more energy to remove valence shell electron.

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Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici
arlik [135]

The given reaction is:

C4H10 + O2 → CO2 + H2O

The above equation is not balanced due to the unequal distribution of atoms on either side of equation

# atoms Reactants           # atoms products

C = 4                                    C = 1

H = 10                                  H = 2

O = 2                                   O = 3

In order to balance it, multiply C4H10 by 2, O2 by 13, CO2 by 8 and H2O by 10 to get:

2C4H10 + 13 O2 → 8CO2 + 10H2O

7 0
4 years ago
Explain on any two materials that you would expect to use for the wheelchair (both back support and
Ugo [173]

Answer:

In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.

And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.

Explanation:

Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.

8 0
3 years ago
A 1.85 kg textbook is sitting on a bookshelf 2.23 m above the floor. How much potential energy does it have?
neonofarm [45]

Answer:

\boxed {\boxed {\sf 40.4299 \ Joules}}

Explanation:

Potential energy is energy due to position. It is the product of mass, height, and acceleration due to gravity.

PE= m \times g \times h

The mass of the textbook is 1.85 kilograms. Assuming this is on Earth, the acceleration due to gravity is 9.8 meters per square second. The height is 2.23 meters.

  • m= 1.85 kg
  • g= 9.8 m/s²
  • h= 2.23 m

Substitute the values into the formula.

PE = 1.85 \ kg \times 9.8 \ m/s^2 \times 2.23 \ m

Multiply the first 2 numbers together.

PE=18.13 \ kg*m/s^2 *2.23 \ m

Multiply again.

PE= 40.4299 \ kg*m^2/s^2

  • 1 kilogram square meter per square second (1 kg*m²/s²) is equal to 1 Joules (J)
  • Our answer of 40.4299 kg*m²/s² is equal to 40.4299 J

PE= 40.4299 \ J

The textbook has <u>40.4299 Joules of potential energy.</u>

7 0
3 years ago
What is calculated by dividing mass volume
dem82 [27]
By dividing mass with volume, you will end up with density
7 0
3 years ago
Why do weak bases have strong conjugate acids?
Margarita [4]
A strong acid like HCl donates its proton so readily that there is essentially no tendency for the conjugate base Cl– to reaccept a proton. Consequently, Cl– is a very weak base.
7 0
3 years ago
Read 2 more answers
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