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
Lelu [443]
3 years ago
11

Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)?

Chemistry
2 answers:
Zigmanuir [339]3 years ago
6 0

The correct answer is Magnesium (Mg)

scZoUnD [109]3 years ago
5 0

Answer:

magnesium

Explanation:

because i just did the test and ik this is the answer

You might be interested in
This equation shows a ____ refer to this summary equation of photosynthesis to complete the sentences about chemical bonds and r
coldgirl [10]

The balanced chemical equation representing the process of photosynthesis is:

6 CO_{2} +12H_{2}O-->C_{6}H_{12}O_{6}+6O_{2}

The reactants in the process of photosynthesis are CO_{2}and HH_{2}O and the products of the reaction are glucose C_{6}H_{12}O_{6} and oxygen O_{2}. Oxygen is the nonpolar covalent gas which is released in the process of photosynthesis. The reactant CO_{2} is a nonpolar covalent gas while the other reactant waterH_{2}O has polar covalent O-H bonds.

In the balanced chemical equation, the number of each type of element must be equal on both sides of the reaction.

6 0
2 years ago
The molecular formula of benzene is C6H6. what is the empirical formula of benzene?
Grace [21]
The empirical formula of benzene is CH
6 0
3 years ago
How many electrons in the same atom can share the quantum number n = 2?. . A. 2 B.6 C.8 D.10
madam [21]
The number of electrons when the quantum number n=2 is 8 electrons. Variab<span>le </span>n<span> represents the principal quantum number which is the number of the energy level. </span>
3 0
2 years ago
Be sure to answer all parts.
MrRissso [65]

Answer: The molarity of each of the given solutions is:

(a) 1.38 M

(b) 0.94 M

(c) 1.182 M

Explanation:

Molarity is the number of moles of a substance present in liter of a solution.

And, moles is the mass of a substance divided by its molar mass.

(a) Moles of ethanol (molar mass = 46 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\= \frac{28.5 g}{46 g/mol}\\= 0.619 mol

Now, molarity of ethanol solution is as follows.

Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.619 mol}{4.50 \times 10^{2} \times 10^{-3}L}\\= 1.38 M

(b) Moles of sucrose (molar mass = 342.3 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\= \frac{21.6 g}{342.3 g/mol}\\= 0.063 mol

Now, molarity of sucrose solution is as follows.

Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.063 mol}{0.067 L}  (1 mL = 0.001 L)\\= 0.94 M

(c) Moles of sodium chloride (molar mass = 58.44 g/mol) are as follows.

Moles = \frac{mass}{molar mass}\\= \frac{6.65 g}{58.44 g/mol}\\= 0.114 mol

Now, molarity of sodium chloride solution is as follows.

Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.114 mol}{0.0962 L}\\= 1.182 M

Thus, we can conclude that the molarity of each of the given solutions is:

(a) 1.38 M

(b) 0.94 M

(c) 1.182 M

4 0
3 years ago
What happens to a liquid when you keep on cooling it until it changes?
Gnesinka [82]

Answer:

it turns into a solid

6 0
3 years ago
Other questions:
  • How calculate how many milliliters of glycerin (specific gravity=1.26) will have a mass of 0.75 lbs?
    11·1 answer
  • rite stepwise equations for protonation or deprotonation of this polyprotic species in water. What are the products of the first
    12·1 answer
  • Give the molecular geometry and number of electron groups for sf4. give the molecular geometry and number of electron groups for
    8·1 answer
  • Which layer of the atmosphere is between the stratosphere and the thermosphere
    12·1 answer
  • Which examples would be found in Earth's biosphere? Check all that apply.
    12·1 answer
  • A ________ reaction occurs when one compound reacts and is broken down into different elements or simpler compounds?
    5·2 answers
  • What major product is formed when heptyne is treated with Br2 in CCl4?
    11·2 answers
  • 6q+4-q+5 <br><br> please help
    9·1 answer
  • Is sand an element or a compound?
    12·1 answer
  • What mass of aluminum is needed to produce 0.500 mole of aluminum chloride?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!