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
goldfiish [28.3K]
3 years ago
7

A period is a horizontal row on the periodic table. a. True b. False

Chemistry
1 answer:
Kay [80]3 years ago
6 0
It is True because in the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
You might be interested in
Temperature zone occurs between tropical and polar zones
scoundrel [369]
Yes, that's correct. It's the tepid latitude.
6 0
3 years ago
Give the nuclear symbol for the isotope of potassium for which a=40?
KATRIN_1 [288]

<span>nuclear symbol consists of three parts: 1. the symbol of the element; 2. the atomic number of the element;3. the mass of the element. for the above problem, the symbol for potassium is k. it's atomic number is 40. the number of protons is 19. so we denote this in the following nuclear symbol; 40 k 19</span>

4 0
3 years ago
Read 2 more answers
Calculate the volume in liters of a 0.00231M copper(II) fluoride solution that contains 175.g of copper(II) fluoride CuF2. Be su
Free_Kalibri [48]

Answer:

Volume = 746 L

Explanation:

Given that:- Mass of copper(II) fluoride = 175 g

Molar mass of copper(II) fluoride = 101.543 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{175\ g}{101.543\ g/mol}

Moles_{copper(II)\ fluoride}= 1.7234\ mol

Also,

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

So,,

Volume =\frac{Moles\ of\ solute}{Molarity}

Given, Molarity = 0.00231 M

So,

Volume =\frac{1.7234}{0.00231}\ L

<u>Volume = 746 L</u>

7 0
3 years ago
How many molecules are there in 5.0g of C2H5OH?
Vilka [71]
About 6.5x10^22 molecules. (5g C2H5OH)x(1 mol C2H5OH/46g C2H5OH)x(6.02x10^23 molecules C2H5OH/1 mol C2H5OH)=(3.01E24)/46=6.5x10^22. Let me know if this helped!
4 0
3 years ago
I swear, everyone just ignores my question, but I'm going to ask anyways. A beaker is filled with 5.4 grams of Oxygen gas in a f
Verizon [17]

Answer:

2 P2 (1.2 atm =157 one. 8. A gas with a volume of 4.0 L

Explanation:

7 0
3 years ago
Other questions:
  • The density of a substance is 4.8 g/mL. What is the volume of the sample that is 19.2 g?
    8·1 answer
  • What is the electron configuration of a chlorine ion in a compound of BeCl2?
    14·2 answers
  • According to the big bang theory, the universe—all of the stars, planets, and galaxies everywhere—began as a very small, dense m
    14·1 answer
  • Can someone give me periodic table till 30?​
    11·1 answer
  • What is saturated solution and how it is prepared
    15·1 answer
  • The layer of skin that we see when we
    12·1 answer
  • Can anyone help with chem please.
    14·1 answer
  • What compound name is As5O2
    6·1 answer
  • An unknown atom has 5
    9·1 answer
  • How is oxygen within the hydrosphere?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!