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
zysi [14]
3 years ago
10

Which elements, when they have to, can have more than

Chemistry
1 answer:
inn [45]3 years ago
6 0
Elements in the third row can break the octet rule
You might be interested in
The potential in an electrochemical cell, E, is related to the Gibb's free energy change (ΔG) for the overall cell redox reactio
Nana76 [90]

Answer:

Explanation:

As an example, the following cell reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(m) generates a cell voltage of +1.10 V under standard conditions. Calculate and enter delta G degree (with 3 sig figs) for this reaction in kJ/mol.

Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(m)

ΔG = ΔG° + RTInQ

Q = 1

ΔG = ΔG°

ΔG = =nFE°

n=no of electrons transfered.

E° = 1.1v

ΔG° = -2 * 96500 * 1.10

= -212300J

ΔG° =-212.3kJ/mol

<h3>Therefore, the ΔG° = -212.3kJ/mol</h3>
5 0
3 years ago
Calculate the number of atoms in 2.5 moles of Si.
Ede4ka [16]

Answer:

\boxed {\boxed {\sf About \ 1.5 * 10^{24} \ atoms \ Si}}

Explanation:

When converting from moles to atoms, we must use Avogadro's number. This number tells us there are 6.022 * 10²³ atoms in 1 mole. We can multiply this number by the number of moles.

First, we must set up Avogadro's number as a ratio.

\frac {6.022 \ * 10^{23} \ atoms \ Si }{1 \ mol \ Si}}

Next, multiply the number of moles by the ratio.

2.5 \ mol \ Si *\frac {6.022 \ * 10^{23} \ atoms \ Si }{1 \ mol \ Si}}

When we multiply, the moles of silicon will cancel.

2.5 * \frac {6.022 \ * 10^{23} \ atoms \ Si }{1}}

Since the denominator of the fraction is 1, we can cancel it out too.

2.5 *  {6.022 \ * 10^{23} \ atoms \ Si }

1.5055 * 10^{24} \ atoms \ Si

The original measurement (2.5 moles) has 2 significant figures (2 and 5). Therefore we must round to 2 sig figs. For this question, 2 sig figs is the tenth place.

The 0 in the hundredth place tells us to leave the 5 in the tenth place.

1.5 * 10^{24} \ atoms \ Si

There are about <u>1.5 * 10²⁴ atoms of silicon.</u>

7 0
2 years ago
Answer to AP chem question
steposvetlana [31]

Answer:

C4H8

Explanation:

M(CF2) = M(C) + 2M(F) = 12.0 + 2*19.0 = 50.0 g/mol

M(unknown)/M(CF2) = 200.4 g/mol /50.0 g/mol = 4

So we need to take CF2 4 times.

C4H8

7 0
3 years ago
What statement goes against the kinetic theory of gases
Arada [10]

Gas molecules will never collide with the walls of the container

8 0
3 years ago
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!
GREYUIT [131]
They each have one valence electron in their outer shell, but they are also on the same row (period). If you follow this pattern, potassium will also have one valence electron.

Hope this helps!! :)
5 0
2 years ago
Other questions:
  • A chemistry graduate student is studying the rate of this reaction:
    5·1 answer
  • What is the mass in grams of a pure iron cube that has a volume of 4.60 cm3
    13·1 answer
  • What are the examples of all the non metals in the first twenty element​
    12·1 answer
  • Which description of nitrogen-15 is correct?
    11·1 answer
  • When do plants use the process of cellular respiration
    14·1 answer
  • Match each term with the appropriate definition.
    11·1 answer
  • Calculate the percentage error in the molar mass of our natural gas which is 16.9g/mol
    15·1 answer
  • Which form of energy does a car's engine convert into mechanical energy?
    5·1 answer
  • chinua reacts 37g of magnesium with 150g of sulfuric acid. what will be the total mass of the products of this reaction
    5·1 answer
  • Find the pH of 0.0025M sodium benzoate
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!