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
bixtya [17]
3 years ago
15

Look at the above table.

Chemistry
1 answer:
MariettaO [177]3 years ago
7 0

Answer:

<em> 1</em>. A. 0

<em>2</em>. B. 7

<em>3. </em>C<em>.</em><em> </em>4

Explanation:

1. charge is equal to the number of protons minus the number of electrons!

2. neutrons is equal to mass number minus atomic number!

3. valence electrons equal 4!

Hope this helped you! :)

You might be interested in
Write the expression for the equilibrium constant Kp for the following reaction. (Enclose pressures in parentheses and do NOT wr
Liono4ka [1.6K]

Answer and Explanation:

For the following balanced reaction:

PCl₅(g) ↔ PCl₃(g) + Cl₂(g)

We can see that all reactants and products are gases, so it is an homogeneous equilibrium. The expression for the equilibrium constant Kp can be written from the partial pressures (P) of reactants and products as follows:

Kp=\frac{(P PCl_{3})(P Cl_{2})}{(P PCl_{5})}

Where PPCl₃ is the partial pressure of PCl₃ (reactant), PCl₂ is the partial pressure of Cl₂ (reactant) and PPCl₅ is the partial pressure of PCl₅ (product).

6 0
2 years ago
The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab. How many moles of dextrose is this equivalent t
Katena32 [7]

The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab the moles of dextrose is this equivalent to is 3.6888 moles.

<h3>What are moles?</h3>

A mole is described as 6.02214076 × 1023 of a few chemical unit, be it atoms, molecules, ions, or others. The mole is a handy unit to apply due to the tremendous variety of atoms, molecules, or others in any substance.

To calculate molar equivalents for every reagent, divide the moles of that reagent through the moles of the restricting reagent. The calculation is follows:

  • 655/12 x 6 + 12+ 16 x 6
  • = 655/ 180 = 3.6888 moles.

Read more about moles:

brainly.com/question/24322641

#SPJ1

6 0
2 years ago
What is the total number of moles represented by 20 grams of CACO3
Nutka1998 [239]

Answer:

B. 0.2.

Explanation:

  • We can use the relation:

<em>n = mass/molar mass</em>

mass of CaCO₃ = 20 g, molar mass of CaCO₃ = 100.0869 g/mol.

<em>∴ n = mass/molar mass = </em>(20 g)/(100.0869 g/mol) <em>= 0.1998 ≅ 0.2 mol.</em>

<em></em>

<em>So, the right choice is: B. 0.2.</em>

8 0
3 years ago
How does ur body maintain constant tempature on a hot day?
Lina20 [59]

It knows that when water evaporates, it carries heat energy away with it. 
So your body puts some water out on your skin, and hopes that it will
evaporate.  We call that "perspiring" or "sweating".


8 0
3 years ago
Read 2 more answers
If the speed of an object increases, its kenetic energy
Taya2010 [7]

Answer:

question?

Explanation:

didnt saynsnsns

8 0
3 years ago
Other questions:
  • What information did the scientists miss in 1948 and 1966 that caused them to
    8·1 answer
  • Example of a good electrical conduct
    9·1 answer
  • At room temperature, 20ÁC, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer bes
    6·1 answer
  • The use of crucible​
    6·1 answer
  • The moon appears larger than most of the planets in our solar system because ______?
    13·2 answers
  • A drinking water supply is suspected of being contaminated with lead. Samples of water aspirated directly into an air-acetylene
    12·1 answer
  • What is the relationship between grams and cm³? ​
    12·1 answer
  • How many grams in 1.000 moles of oxygen gas?
    13·1 answer
  • A. How many moles AgNO3 will need to make 6.5 moles of Ca (NO3)2?
    10·1 answer
  • The chemical process of photosynthesis is one that requires a constant supply of energy to proceed; in this
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!