1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mamaluj [8]
3 years ago
5

Why does the d block start in the fourth row of the periodic table

Chemistry
1 answer:
natita [175]3 years ago
3 0

Answer:

Why does D-block start on the fourth row of the periodic table?

Explanation:

The require more energy to reach 3d than 4s, and they fill up 4p before 4d, and so forth. ... The energy is lower for 6s than 4f, and 4f and 5f are lower in energy than the final D level.

You might be interested in
0.5 kg or 0.5 lb which is a larger quantity
masha68 [24]
The correct answer is 0.5 kg If you whant me to explaine pls tell me
3 0
3 years ago
You are given two fatlike solid substances and determine that sample a has a higher melting point than sample
Alchen [17]
Given that <span>sample a has a higher melting point than sample
b. Therefore, sample a is a longer chain of a </span><span>fatlike solid substance. It could also be that the bonds present in sample a is much stronger which will require more energy to break. Hope this answers the question.</span>
5 0
3 years ago
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C, the rate constant of the reaction is 1.94 × 10-4 min-
grin007 [14]

Answer:

Total pressure 5.875 atm

Explanation:

The equation for above decomposition is

2N_2O \rightarrow 2N_2 + O_2

rate constant k =  1.94\times 10^{-4} min^{-1}

Half life t_{1/2} = \frac{0.693}{k} = 3572 min

Initial pressure N_2 O = 4.70 atm

Pressure after 3572 min = P

According to first order kinematics

k = \frac{1}{t} ln\frac{4.70}{P}

1.94\times 10^{-4} = \frac{1}{3572} \frac{4.70}{P}

solving for P we get

P = 2.35 atm

2N_2O \rightarrow 2N_2 + O_2

initial           4.70                         0             0

change        -2x                          +2x           +x

final             4.70 -2x                     2x           x

pressure ofO_2 after first half life  = 2.35 = 4.70 - 2x

                                                          x = 1.175

pressure of N_2 after first half life  =  2x = 2(1.175) = 2.35 ATM

Total pressure  = 2.35 + 2.35 + 1.175

                          = 5.875 atm

5 0
3 years ago
Read 2 more answers
PLS HELPA! Which procedure could be used to demonstrate that matter is conserved during a physical change?
Fudgin [204]

Answer:

im not too smart, but i would say, either b or d

Explanation:

4 0
3 years ago
Read 2 more answers
How much atomic mass does Osmium have
svp [43]

Answer:

190.23g

Explanation:

Osmium is element number 76 on the periodic table, with the atomic symbol "Os." The atomic mass of any element is listed underneath the atomic symbol. Osmium has an atomic mass of 190.23 grams.

8 0
3 years ago
Other questions:
  • Find the atomic numbers of the as yet undiscovered next two members of the series. radon
    9·2 answers
  • What do weather maps display?
    7·2 answers
  • The reported molar mass for the copper oxide formed in experiment 1 is 79.55 g/mol. what is the molecular formula of the oxide f
    9·1 answer
  • Chemicals used in a laboratory investigation must be safely discarded. Which method is the safest way to dispose of chemicals at
    14·1 answer
  • A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
    8·1 answer
  • An element's atomic number (ID number) is equal to the number of ______ that element has.
    9·2 answers
  • B. the aldaric acid of l-idose is the same as the aldaric acid of which sugar?
    5·1 answer
  • HELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPP
    9·1 answer
  • Mass and energy are conserved:
    14·1 answer
  • Mechanical waves travel best through a
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!