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
xeze [42]
3 years ago
12

What are "representative elements"?

Chemistry
2 answers:
Mars2501 [29]3 years ago
8 0

Answer: c. elements in the same row of the periodic table

Explanation: It kind of represents a graph of the periodic table

GrogVix [38]3 years ago
4 0

Answer:

Elements in the tall columns of the periodic table

Explanation:

You might be interested in
PLEASE HELP ASAP WILL GIVE BRAINLIEST
soldier1979 [14.2K]

Answer:

X+ ion cation is smaller than neutral atom because when one or more electrons are lose by an atom it usually result in lose of shell.

And when electron is removed positive/ negative charged ratio increas which causes more effective nuclear charge.

The more effective nuclear charge the less its size.

Explanation:

8 0
3 years ago
Example 1: urea, (nh2)2co, is used in the manufacture of resins and glues. when 5.00 g of urea is dissolved in 250.0 ml of water
katen-ka-za [31]
A) i believe the reaction is exothermic, because 27.6 kg of thermal energy is gained by the water solution, the dissolution of urea is exothermic. Exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction where heat is gained by the reaction.

b) The water gained the heat released when urea dissolve. That is the water gained 27.6 kJ, while dissolution of urea released 27.6 kJ. Therefore, the heat gained is equal to the heat lost.

c) From part B, since heat gained is equal to heal lost, then
250 g × (Tf -30) ×4.18 J/g = 27600 J
 = 1045 Tf - 31350J = 27600 J
Tf = 56.41°C.
Therefore the final temperature  of the solution is 56.41°C

d) The initial and final temperature in Fahrenheit
°F = °C × (9/5) +32,
Thus, 30°C will be equal to 86° F
while 56.41 will be equivalent to  133.54 ° F


7 0
3 years ago
Read 2 more answers
Please Help! 30 PTS. for correct answer and best explanation!
irakobra [83]

Look kid, this question has been up for 17 hours think its time to let it go......... hoped i helped. ✔verified✔

6 0
3 years ago
Read 2 more answers
Distilled water density 1.0 g/cm^3 propane density 0.494 g/cm^3 salt water density 1.025 g/cm^3 liquid gold density 17.31g/cm^3
I am Lyosha [343]
What are you asking?
6 0
3 years ago
What is the molarity of an H3PO4solution if 15.0 mL is completely neutralized by 38.5 mL of 0.150 MNaOH? Please explain your ans
rodikova [14]

Answer:

M=Molarity

V=volume

change millilitre to litre

so:15ml=0.015 L

:38.5ml=0.0385 L

M1V1=M1V1

M1* 0.015 L= 0.15M*0.0385 L

M1=0.00385

8 0
3 years ago
Other questions:
  • A particle of light has a wavelength of 7.0×10−7 m. What color of light is represented and what is the amount of energy released
    14·1 answer
  • The hybird orbitals used for bonding by xe in unstable xef2 molecules
    9·1 answer
  • What is a well-mixed mixture that contains a solvent and at least one solute
    14·1 answer
  • 2.4 kg convert to cg
    5·1 answer
  • What is the relationship between the kinetic energy of molecules in a solid and a liquid? Justify your response in two or
    8·1 answer
  • Lead II chloride + sodium nitrite is what?​
    15·1 answer
  • What are the types of radiation emitted by the nuclei of radioactive elements?
    7·1 answer
  • Do you think it would be a good idea for a bumper car ride to have minimum and maximum weight requirements for riders? Apply New
    7·1 answer
  • A student uses a variety of techniques to separate four different compounds from 2.10 g of a mixture. After separation of the
    13·1 answer
  • A chemical reaction between X2 (red) and Y2 (blue) produces XY (red-blue). All compounds are in a gaseous state and each molecul
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!