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
user100 [1]
3 years ago
5

What are the three broad classes of elements

Chemistry
1 answer:
mario62 [17]3 years ago
4 0
The three broad classes of elements are:

Metals
Metalloids
Nonmetals

You might be interested in
Should a mortar and pestle should be used for grinding only one substance at a time
MatroZZZ [7]
The mortar and pestle is most commonly used in chemical laboratories or in the kitchen. Its key function is to grind the material into smaller pieces, usually into its powdered form. It looks like that shown in the picture. The mortar is the bowl in which the material to be pounded is placed, and the pestle does the pounding.

Now, when you ask if it can only pound one at a time, my honest answer is, it depends. Depending on the size of your mortar, you could grind materials two or three at a time. But if you are concerned with contamination, then you do it one at a time, especially if you don't want them to get mixed up.

8 0
3 years ago
B. if 6.73 g of na2co3 is dissolved in enough water to make 250. ml of solution, what is the molar concentration of sodium carbo
BARSIC [14]

Answer:- [Na_2CO_3]=0.254M , [Na^+]=0.508 M , [CO_3^2^-]=0.254M

Solution:- We are asked to calculate the molarity of sodium carbonate solution as well as the sodium and carbonate ions.

Molarity is moles of solute per liter of solution. We have been given with 6.73 grams of sodium carbonate and the volume of solution is 250.mL.  Grams are converted to moles and mL are converted to L and finally the moles are divided by liters to get the molarity of sodium carbonate.

Molar mass of sodium carbonate is 105.99 gram per mol. The calculations for the molarity of sodium carbonate are shown below:

\frac{6.73gNa_2CO_3}{250.mL}(\frac{1mol}{105.99g})(\frac{1000mL}{1L})

= 0.254MNa_2CO_3

So, molarity of sodium carbonate solution is 0.254 M.

sodium carbonate dissociate to give the ions as:

Na_2CO_3(aq)\rightarrow 2Na^+(aq)+CO_3^2^-

There is 1:2 mol ratio between sodium carbonate and sodium ion. So, the molarity of sodium ion will be two times of sodium carbonate molarity.

[Na^+]=2(0.254M) = 0.508 M

There is 1:1 mol ratio between sodium carbonate and carbonate ion. So, the molarity of carbonate ion will be equal to the molarity of sodium carbonate.

[CO_3^2^-]=0.254M


5 0
3 years ago
10 examples of<br>combination reaction​
Alla [95]

You can easily find hundreds on the internet.

4 0
2 years ago
Read 2 more answers
What carries information to the brain?
Vika [28.1K]
I believe the medulla is the answer.
3 0
3 years ago
Read 2 more answers
Which organism would have the most variation in the DNA of its offspring?
Arada [10]

The organism that would have the most variation in the DNA of its offspring is the cat (Option C). Meiosis is a type of cell division that generates more genetic variability than asexual types of reproduction.

Meiosis is a type of reductional cell division by which a parental cell produces 4 daughter cells (gametes), each containing half of the genetic material.

Animals (e.g., cats) generate gametes by meiosis which fuse during fertilization to produce new offspring.

Both amoeba and bacteria reproduce by a type of asexual reproduction called binary fission. Moreover, yeasts also reproduce asexually by a process called budding and fission.

Both asexual and sexual types of reproduction generate genetic variability by the emergence of new mutations in daughter cells.

Meiosis generates much more genetic variability than asexual types of reproduction due to two different processes:

  • Random assortment of chromosomes, which produces new allele combinations.

  • Recombination, i.e., by the exchange of genetic material (DNA) between non-sister chromatids during Prophase I.

Learn more in:

brainly.com/question/7002092

5 0
2 years ago
Other questions:
  • If you have 100 grams of H2, how many moles of H2 is that?
    11·2 answers
  • Which phase change represents sublimation
    10·1 answer
  • I HAVE TIME LIMIT I NEED CORRECT ANSWERS!
    7·1 answer
  • A single atom of an element has 11. protons, 11. electrons, and 12 neutrons. Which element is it?
    13·2 answers
  • Convert 650. J of energy to either kcal or cal
    13·1 answer
  • Identify the missing particle in the following nuclear equation.
    6·1 answer
  • Given the balanced chemical equation for the decomposition for INO, and the rate of disappearance of INO, write the expressions
    11·1 answer
  • 1. Do you think water molecules speed up or slow down<br> when they are heated? *
    8·1 answer
  • What is the chemistry​
    7·2 answers
  • What is the Golgi body made of?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!