All categories

3 years ago

10. How many elements do all the "d" orbital span (go across) in each period? (circle your answer)

Chemistry

1 answer:

Tamiku [17]3 years ago

8 0

S orbits hold 2 electrons P orbits hold 6 electrons D orbits hold 10 electrons and F orbits hold 14 electrons

You might be interested in

A 95,000g refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the

NNADVOKAT [17]

Answer:

285 kJ

Explanation:

potential energy

= m g h

= 95,000 g × 10 m/s² × 300 meters

= 95 kg × 10 m/s² × 300 meters

= 950 kgm/s² × 300 meters

= 285,000 J

= 285 kJ

6 0

3 years ago

If 15.0 mL of 12.0 M H3PO4 reacts with 100.0 mL of 3.50 M of Ba(OH)2 , which substances is the limiting reactant?

____ [38]

Use the formula stated below

$\boxed{\sf Molarity=\dfrac{Moles\:of\:solute}{Volume\:in\:L}}$

#H_3PO_4

No of moles

$\\ \tt\Rrightarrow n=0.015(12)=0.18moles$

#Ba(OH)_2

$\\ \tt\Rrightarrow n=0.1(3.5)=0.35mol$

Barium hydroxide is more

Hence H_3PO_4 is the limiting reagent

3 0

3 years ago

You and a friend move a grand piano across the living room, exerting 25 newtons of force and performing 175 joules of work. It t

agasfer [191]

<h3>Answer:</h3>

Distance = 7 m

Power = 12.5 J/s or watts

<h3>Explanation:</h3>

Work done = 175 Joules

Force exerted = 25 Newtons

Work done is the product of force exerted and the distance moved by a body.

Therefore;

Work done = Force × distance

Rearranging the formula we can work out the distance;

Distance = work done ÷ Force

= 175 J ÷ 25 N

= 7 m

Thus, the grand piano was moved by 7 m across the living room .

On the other hand,

Power is the rate at which the work is done.

Therefore;

Power = Work done ÷ time

Work done = 175 Joules

Time = 14 seconds

Thus;

Power generated = 175 J ÷ 14 sec

= 12.5 J/s or watts

Hence, a power of 12.5 J/s was generated in moving the grand piano.

8 0

4 years ago

An atom of 105In has a mass of 104.914558 amu. Calculate the binding energy in MeV per NUCLEON. Enter your answer with 3 signifi

joja [24]

Answer:

8.46

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of I = 549

Thus, the number of protons = 49

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

105 = 49 + Number of neutrons

Number of neutrons = 56

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (49*1.007825 + 56*1.008665) amu = 105.868665 amu

Mass defect = Δm = |105.868665 - 104.914558| amu = 0.954107 amu

The conversion of amu to MeV is shown below as:-

1 amu = 931.5 MeV

<u>So, Energy = 0.954107*931.5 MeV/atom = 888.750671 MeV/atom</u>

Also, 1 atom has 105 nucleons (Protons+neutrons)

<u>So, Energy = 888.750671 MeV/105nucleons = 8.46 MeV/nucleon</u>

<u>Answer:- 8.46</u>

8 0

3 years ago

In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of s

igomit [66]

Six molecules of oxygen.

6 CO2 + 6 H2O ----> 6 C6H12O6 + 6 O2

4 0

4 years ago

Read 2 more answers