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
valina [46]
3 years ago
9

The _____ identifies an element.

Chemistry
2 answers:
larisa [96]3 years ago
8 0
B the atomic number becose of the
marin [14]3 years ago
5 0
Atomic Number. It represents the number of protons in an atom of a particular element, which is what identifies that particular element. If the number of protons is different, the element is different.
You might be interested in
The anther of flower contains​
Hatshy [7]

Answer:

here is your answer please mark me as brainlist

Explanation:

Answer # Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther. Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.

7 0
4 years ago
How many liquids are found on the periodic table?<br><br><br><br> 1
Nookie1986 [14]

There are six liquids found on the periodic table.

1. Bromine

2. Mercury

3. Caesium

4. Gallium

5. Rubidium

6. Francium

3 0
3 years ago
A quantity of 0.225 g of a metal M (molar mass = 27.0 g/mol) liberated 0.303 L of molecular hydrogen (measured at 17°C and 741 m
Lana71 [14]

Answer:

Oxide of M is M_2O_3 and sulfate of M_2(SO_4)_3

Explanation:

0.303 L of molecular hydrogen gas measured at 17°C and 741 mmHg.

Let moles of hydrogen gas be n.

Temperature of the gas ,T= 17°C =290 K

Pressure of the gas ,P= 741 mmHg= 0.9633 atm

Volume occupied by gas , V = 0.303 L

Using an ideal gas equation:

PV=nRT

n=\frac{PV}{RT}=\frac{0.9633 atm\times 0.303 L}{0.0821 atm L/mol K\times 290 K}=0.01225 mol

Moles of hydrogen gas produced = 0.01225 mol

2M+2xHCl\rightarrow 2MCl_x+xH_2

Moles of metal =\frac{0.225 g}{27.0 g/mol}=8.3333 mol

So, 8.3333 mol of metal M gives 0.01225 mol of hydrogen gas.

\frac{8.3333}{0.01225 mol}=\frac{2}{x}

x = 2.9 ≈ 3

2M+6HCl\rightarrow 2MCl_3+3H_2

MCl_3\rightarrow M^{3+}+Cl^-

Formulas for the oxide and sulfate of M will be:

Oxide of M is M_2O_3 and sulfate of M_2(SO_4)_3.

3 0
4 years ago
What is the modren system of classificationis based on
Paul [167]
In modern biology, there are three approaches to classifying organisms: systematics, cladistics and molecular evolutionary taxonomy. They are all based on organisms' relation to each other, but use different indicators to assign the degree of relationship
8 0
4 years ago
How is chemistry apart of daily routine
Alex_Xolod [135]
Chemical<span> reactions takes place in plants and animals, this result in the formation of substances in some plants and animals that can be used to treat illness. </span>Chemistry<span>is </span>important<span> to everyday </span>life<span>, because it provides medicine. The food we consume each day comes directly from </span>chemical<span> processes.</span>
3 0
3 years ago
Other questions:
  • Heat is transfer directly from one particle of matter to another by the process of
    9·2 answers
  • When an organic molecule loses hydrogen atoms it is said to be:_______.
    15·1 answer
  • A substance placed in a container has a fixed volume and takes up the shape of the container. In which state does this substance
    9·1 answer
  • (15 PTS) What are two parts of the atomic theory of atoms?
    11·2 answers
  • What happens when nitrogen fills its valence shell?
    14·1 answer
  • At what temperature does the solid start meltin<br> -20°C<br> 0°C<br> 20"<br> 80°C
    14·1 answer
  • Which two chemical equations model double-replacement reactions?
    8·2 answers
  • Given : 4.50 molte
    13·1 answer
  • A gene is being copied to be passed from a parent to an offspring. While being copied from the parent, a
    12·1 answer
  • Using the table above, calculate the atomic mass of the unknown element.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!