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
WITCHER [35]
3 years ago
14

Identify the element with 3 energy levels and 2 valence electrons.

Chemistry
1 answer:
bixtya [17]3 years ago
8 0

Answer:

itz elementary school in new Jersey city and I was in school for a little while I had a phone and a couple days later and I'm going next week and I'm gonna go back and watch Netflix and get some headphones and a lot more like a child and a couple more like this

You might be interested in
How many grams are in 6.00 moles of NaCl?
Anastasy [175]

Is it 350.4, I assume?

5 0
3 years ago
Read 2 more answers
Teniendo en cuenta los siguientes fenómenos: ebullición del agua- movimiento de un cuerpo- disolución de sal en agua- combustión
miv72 [106K]

Answer:

Las siguientes son reacciones químicas;

combustión de leña

oxidación del hierro

descomposición del agua en hidrógeno y oxígeno

Explanation:

Una reacción química da como resultado la formación de una (s) sustancia (s) nueva (s), mientras que un cambio físico no conduce a la formación de una sustancia nueva.

Las siguientes son reacciones químicas;

combustión de leña: la combustión de madera implica la oxidación del carbono según la reacción; C (s) + O2 (g) -------> CO2 (g)

oxidación del hierro: La oxidación del hierro conduce a la formación de óxidos de hierro. Como; 2Fe (s) + O2 (g) ----> 2FeO (s)

descomposición del agua en hidrógeno y oxígeno: esta es una reacción química en la que el agua se descompone de la siguiente manera; 2H2O (l) -----> 2H2 (g) + O2 (g)

Todos estos procesos enumerados anteriormente conducen a la formación de nuevas sustancias, por lo tanto, son reacciones químicas.

3 0
3 years ago
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 2.7 cm by 1.2 cm by 14.3 cm.
Fofino [41]

Answer:125.0964g

Explanation:

Density = mass/volume

Density = 2.7 gcm-3

Volume=2.7*1.2*14.3=46.332

Mass=?

Mass= density* volume

= 2.7× 46.332=125.0964g

4 0
3 years ago
Pls helpits rlly hard
victus00 [196]

Answer:

5: 0.16

6: 50

Explanation:

Question 5:

We can use the equation density = mass/ volume.

We already have the mass (12g), but now we need to find the volume of the cylinder.

The equation for this is πr²h

So we know the radius is 2 and the height is 6.

π x (2)² x 6 = 24π = 75.398cm³

Now we can use the density equation above:

12/75.398 = 0.1592g/cm³ = 0.16g/cm³.

Question 6:

This time, we have to rearrange the equation density = mass/ volume to find the mass.

We know mass = density x volume.

From the question, the density is 2.5g/mL and the volume is 20mL.

Following the equation above, we do 2.5 x 20 to get 50g.

5 0
3 years ago
Someone help me please ​
kow [346]
1)Straight chain hydrocarbons are named according to the number of carbon atoms: CH4, methane; C2H6 or H3C-CH3, ethane; C3H8 or H3C-CH2-CH3, propane; C4H10 or H3C-CH2- CH2-CH3, butane; C5H12 or CH3CH2CH2CH2CH3, pentane; C6H14 or CH3(CH2)4CH3, hexane; C7H16, heptane; C8H18, octane; C9H20, nonane; C10H22, CH3(CH2)8CH3, ..
5 0
3 years ago
Other questions:
  • When oil and water are mixed vigorously, the oil is broken up into tiny droplets that are dispersed throughout the water. this d
    10·1 answer
  • What does the variable A stand for in the Arrhenius equation? A. activation energy B. frequency factor C. rate constant D. react
    13·1 answer
  • 5. Calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L.
    8·1 answer
  • Assuming ideal behavior, what is the freezing point of a 0.030 m solution of Al2(SO4)3 ?
    5·1 answer
  • Calculate the average atomic mass of antimony
    6·1 answer
  • Answering the following questions will help you focus on the outcomes of the experiments.
    14·1 answer
  • HEEEEeEELP PLEasE! IS SCIENCE
    10·1 answer
  • Which photographs show an object in orbit? Explain your answer.
    5·2 answers
  • Guys please helppp!!!!!
    13·1 answer
  • What can you determine about the feasibility of a reaction if the enthalpy is positive and
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!