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
DIA [1.3K]
3 years ago
9

Please help me! Thank you

Chemistry
1 answer:
juin [17]3 years ago
7 0

Answer:

Elements

Explanation:

Atomic number is a property of elements

You might be interested in
How many molecules are in 1.95 moles of water?
OLEGan [10]
Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules<span> of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g . 2.7144moles H2O ⋅</span>6.022<span>⋅1023molec.1mole H2O =1.635⋅1024molec.</span>
3 0
3 years ago
Read 2 more answers
How have chemists changed our daily lives the most
sladkih [1.3K]
By using what they know to produce new and helpful products
4 0
3 years ago
A sample of 4.0 L of nitrogen, at 1.2 atmospheres, is transferred to a 12 L container.
Zielflug [23.3K]

Answer:

The pressure will be 0.4 atm.

Explanation:

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P*V= k

If you initially have the gas at a volume V1 and press P1, when the conditions change to a volume V2 and pressure P2, the following is satisfied:

P1*V1= P2*V2

In this case:

  • P1= 1.2 atm
  • V1= 4 L
  • P2= ?
  • V2= 12 L

Replacing:

1.2 atm* 4 L= P2* 12 L

Solving:

P2=\frac{1.2 atm*4 L}{12 L}

P2= 0.4 atm

<u><em>The pressure will be 0.4 atm.</em></u>

7 0
3 years ago
I need help please I dont understand this ​
Snezhnost [94]

Answer:

b

Explanation:

bbbbbbbbbbbbbb

6 0
3 years ago
Read 2 more answers
Radiation, Chemical agents and Viruses.
zmey [24]
Radiation, Chemical agents and viruses may all cause C. Generic Mutations.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Isotopes are atoms of the same element with the same number of protons and a different number of
    12·2 answers
  • PLEASE HELP <br> describe the process of paper chromatography????????????
    13·1 answer
  • Click the "draw structure" button to launch the drawing utility. under certain reaction conditions, 2,3−dibromobutane reacts wit
    6·1 answer
  • compute the mass of caso4 that can be prepared by the reaction of 3.2900g of h2so4 with 3.1660g of caco3
    10·2 answers
  • The ability to conduct electricity in the solid state is a characteristic of metallic bonding. This characteristic is best expla
    6·1 answer
  • Balance this equation-<br> Na3PO4 + KOH -&gt; NaOH + K3PO4
    11·2 answers
  • I don't understand this problem<br>?Mg+?02=?Mg0​
    7·1 answer
  • Draw a structural formula for the organic product formed by treating butanal with the following reagent: NaBH4 in CH3OH/H2O You
    13·1 answer
  • What kind of factors are light, temperature, and soil composition? biotic habitat ecological abiotic
    15·2 answers
  • What is the molarity of a solution with 58.9 g of glucose (molar mass: 180.16 g/mol) dissolved in water to a total volume of 450
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!