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
erastova [34]
4 years ago
15

What is the electron configuration for a neutral atom of selenium? For a neutral atom of beryllium?

Chemistry
1 answer:
Anni [7]4 years ago
7 0
Se
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^4
<span><span><span>Be
1s^2 2s^2

</span></span></span>
You might be interested in
What mass in grams of SO2 is needed to react with 37.50 mol of Oz?
-BARSIC- [3]

Answer:

4804.5 g of SO₂ are needed to the reaction

Explanation:

The reaction to produce sulfuric acid is:

2SO₂ + O₂ + 2H₂O →  2H₂SO₄

Ratio is 1:2. 1 mol of oxygen needs 2 moles of sulfur dioxide in order to react. We can propose this rule of three.

If 1 mol of O₂ react to 2 moles of SO₂

Then, 37.50 moles of O₂ will react with (37.5 . 2) /1 = 75 moles of SO₂

We convert the moles to mass, to know the answer:

75 mol . 64.06 g / 1 mol = 4804.5 g of SO₂

6 0
3 years ago
Which of the following is false about a neutral atom of hydrogen?
Nesterboy [21]

Answer: Option (C) is the correct answer.

Explanation:

A neutral hydrogen atom is defined as the atom in which electrons are resent in their ground state only.

Basically in a neutral atom electrons are present in their parent shell.

For example, atomic number of hydrogen is 1 and electronic configuration of a neutral atom of hydrogen is 1s^{1}.

Hence, it means there is only one electron present in its valence shell. So, in order to attain stability it will readily react with another atom to gain or share an electron.

Thus, we can conclude that the statement it is less chemically reactive than an atom of aluminum (Al), is false.

3 0
3 years ago
5. Which climate conditions will cause the fastest chemical weathering of granite, sandstone and shale?
NemiM [27]

Answer:

B. Warm and wet

Explanation:

higher temperatures and more rainfall increase chemical weathering, rocks in tropical regions weather more than in other regions.

8 0
3 years ago
For an aqueous solution of sucrose (C12H22O11), determine: (a) the molarity of 3.30 L of a solution that contains 225.0 g of suc
dusya [7]

Answer:

a) Molarity = 0.199M

b) 21.6L of solution

c) 0.199 moles of sucrose in 1L

Explanation:

a) Molarity is the ratio of moles of solute (sucrose) in volume of solution (3.30L):

<em>Moles sucrose -Molar mass: 342,3g/mol-:</em>

225.0g * (1mol / 342,2965g) = 0.6573 moles

Molarity = 0.6573 moles / 3.30L

<h3>Molarity = 0.199M</h3><h3 />

b) 0.199M means 0.199 moles in 1L. 4.30 moles are in:

4.30 mol * (1L / 0.199mol) = 21.6L of solution

c) By definition, there are 0.199 moles of sucrose in 1L. This is the meaning of 0.199M

8 0
3 years ago
What would happen to a glass of water placed in a closet for a few days? Why do you think this would happen?
Deffense [45]

Answer: It would evaporate. Random higher energy molecules in the surface and in the air will add energy by collision to the water molecules leading some of them to escape the liquid which is evaporation.

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the amount of heat needed to boil 159.g of water
    7·1 answer
  • What is the freezing point of an aqueous solution that boils at 105.0 ∘C? Express your answer using two significant figures.
    14·1 answer
  • Which one of the following statements is not true concerning 2.00 L of a 0.100 M solution of Ca3(PO4)2?
    12·1 answer
  • How many significant figure are in the number 0.000850320
    5·1 answer
  • A solid with a low melting point is most likely
    14·2 answers
  • Why do you need to be extremely cautious around electric fans?
    5·2 answers
  • A scientist observed a 5-mL sample of an unknown substance. It is a blue liquid with a density of 1.2 g/cm. the substance reacts
    12·1 answer
  • Erbium metal (Er) can be prepared by reacting erbium(III) fluoride with magnesium; the other product is magnesium fluoride. Writ
    10·1 answer
  • What is a coefficient?
    9·2 answers
  • Help plz:))) I’ll mark u brainliest ASAP 10 points
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!