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
Natasha_Volkova [10]
2 years ago
14

Help me please will mark brainliest ​

Chemistry
2 answers:
Ilya [14]2 years ago
4 0

Answer:

D

Explanation:

Period is horizontal group, so left to right it does increase. Down the side they are numbered 1-7 and depending on valence electrons they can have different properties

murzikaleks [220]2 years ago
4 0

Answer:

A

Explanation:

Im pretty sure it's A. I MIGHT be wrong so dont quote me on this. THis is what the internet says:

"Atomic Radius. Atomic radii decrease from left to right across a period and increase from top to bottom along a group."

You might be interested in
Determine the heat energy needed to raise the temperature of 120 grams of ice at -5 to steam at 115°
CaHeK987 [17]

Answer:

Q = 30355.2 J

Explanation:

Given data:

Mass of ice = 120 g

Initial temperature = -5°C

Final temperature = 115°C

Energy required = ?

Solution:

Specific heat capacity of ice is = 2.108 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = m.c. ΔT

ΔT = T2 -T1

ΔT = 115 - (-5°C)

ΔT = 120 °C

Q = 120 g × 2.108 j/g.°C × 120 °C

Q = 30355.2 J

5 0
3 years ago
Complete the mechanism for the acid-catalyzed hydrolysis of the epoxide in alcohol by adding any missing atoms, bonds, charges,
Sauron [17]

Answer:

See explanation below

Explanation:

You are missing the structure, therefore, I will do an example with one that I found on another place to try to explain.

This acid mechanism always involves carbocations, and positive charges, never negative because we are in acidic mediums.

In the first step, the lone pairs of the oxigen from the epoxide, substract one hydrogen of the reactant.

Second step, the lone pairs of the oxygen from the reactant, do a nucleophylic attack to the carbon of the epoxide. In this case, it will do it to the most substitued carbon.

Then, in the third step by acid base equilibrium, the hydrogen from the reactant that attacked, is substracted from the molecule by a molecule of water (We are in acid medium, therefore, there is traces of water) and the final structure is formed.

Check picture for mechanism:

4 0
3 years ago
How many molecules are present in 2.00 mol of KCl?
Tom [10]

Answer:

The question specified 2 moles of potassium chloride. Clearly, there are 2 moles of chloride ions. How many moles of chloride ions in 95.2 g

5 0
2 years ago
How to solve what volume of 12.0 m hcl is required to make 75.0 ml of 3.50 m hcl?
pochemuha
75mL=0.075L

Molarity=moles/Liters
Moles=0.075(3.50)
=0.2625

Since the number of moles never changes,
we know there are 0.2625moles (or 0.26) in the 12M HCl.
0.2625/12=0.021875L

(0.022L)
4 0
3 years ago
How many grams of NH3 are produced when 39.8 liters of N2 reacts?
algol13

Answer:

inj

Explanation:

3 0
3 years ago
Other questions:
  • In the winter, a heated home in the Northeast might be maintained at a temperature of 78°F. What is this temperature on the Cels
    5·1 answer
  • Which part of the eye controls whether or not the pupil dilates or constricts?
    7·1 answer
  • Which of the following is NOT a characteristic of a compound?
    6·1 answer
  • | What material does Not Melt At any<br> temperature?
    9·1 answer
  • A newly discovered element, Z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267
    12·1 answer
  • Object A at 40.°C and object B at 80.°C are placed in contact with each other. Which statement describes the heat flow between t
    7·2 answers
  • How many Noble gases are there?
    10·2 answers
  • Write an introductory text about metals, adding details you know
    14·1 answer
  • Consider the following reaction at 298K.
    6·1 answer
  • Are the following combinations allowed? If not, show two ways to correct them:
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!