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
babunello [35]
3 years ago
8

Which of the following lists of elements are in the same PERIOD? *

Chemistry
1 answer:
yuradex [85]3 years ago
5 0
Ca, V, Cu, Kr
Remember a period is a the horizontal rows in the Periodic Table.

You might be interested in
2 bromocyclopentanamine structural formula
Elis [28]

Answer:

The structure is given in attached file.

Explanation:

Explanation

2-bromocyclopentamine (Figure attached) is a synthetic compound which is synthesized by substitution reaction of cyclopentamine and hydrobromide. Its molecular formula and molecular mass are C5H10NBr and 164.05 mol/g respectively.  It is a very reactive compound so it doesn’t available in pure form, it is present in market as a mixture of 2-bromocyclopentamine and Hydrobromide.

Properties :

Its boiling point is 115 0C

Its melting point is – 75 oC

It is highly flammable

It is highly toxic

It is irritant

It is corrosive in nature

5 0
3 years ago
When is it necessary for a scientists to do research?
MAXImum [283]
I would say A and D. A is right for sure, as for D, I'm not so sure. Hope this helps!
5 0
3 years ago
Read 2 more answers
1. Surface area, agitation, and ____ affect the dissolving rate of a solid. 1. termperature 2. location​
mamaluj [8]

Answer:??

Explanation:

3 0
2 years ago
Read 2 more answers
Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn
MakcuM [25]

Answer:

ΔH°rxn = - 433.1 KJ/mol

Explanation:

  • CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g)

⇒ ΔH°rxn = 4ΔH°HCl(g) + ΔH°CCl4(g) - 4ΔH°Cl2(g) - ΔH°CH4(g)

∴ ΔH°Cl2(g) = 0 KJ/mol.....pure element in its reference state

∴ ΔH°CCl4(g) = - 138.7 KJ/mol

∴ ΔH°HCl(g) = - 92.3 KJ/mol

∴ ΔH°CH4(g) = - 74.8 KJ/mol

⇒ ΔH°rxn = 4(- 92.3 KJ/mol) + (- 138.7 KJ/mol) - 4(0 KJ/mol) - (- 74.8 KJ/mol)

⇒  ΔH°rxn = - 369.2 KJ/mol - 138.7 KJ/mol - 0 KJ/mol + 74.8 KJ/mol

⇒ ΔH°rxn = - 433.1 KJ/mol

4 0
3 years ago
Read 2 more answers
There are two different compounds of sulfur and fluorine.
Sedaia [141]
<span>1.18 x 3 = 3.55 </span>
find  ratio of F to F in each compound
.   according to law of multiple proportions  that the masses of one element which combine with a fixed mass of the second element are in a ratio of whole numbers.
now  F is  "one element" and S has  "fixed mass",
the ratio of F6 to Fx = 3:1 
<span>thats why  x= 2
there is less F in SFx
  the ratio is 3:1.
 dividing 6 by 3 and you get 2</span>
5 0
3 years ago
Other questions:
  • Ionic formula for ethanoate ion
    10·1 answer
  • What net ionic equation describes the reaction when these solutions are mixed?
    10·1 answer
  • For+the+reaction+H2+++I2+-+2HI+the+equilibrium+constant,+kc+is+49+at+a+fixed+temperature.+Two+mole+of+hydrogen+and+two+moles+of+
    8·1 answer
  • Which chemical do you think would best maintain the pH of the pool water?
    12·2 answers
  • A sample of pure sodium-24 has an initial mass of 10.0 grams. How many grams of sodium-24 will remain at the end of 4 half-lives
    6·1 answer
  • How are repetition and replication alike and different?
    14·1 answer
  • The paths in which electrons travel are called what ovals ,paths,circles,orbitals
    13·2 answers
  • Soil is an example of a:<br> a. solution <br> b. heterogeneous mixture <br> c. solid solution
    15·1 answer
  • How many molecules of water are in 1.52 moles of water?
    13·1 answer
  • Composition about my favorite sport in french​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!