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
nika2105 [10]
3 years ago
6

True or false the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation stat

Chemistry
1 answer:
ExtremeBDS [4]3 years ago
6 0
The statement is true. The octet rule refers to the general rule of thumb wherein atoms of main-group elements tend to bond with other atoms in such a way that each atom possesses eight electrons (octet) in their valence shell. They tend to form the same electronic configuration as the noble gases. However, there are some exceptions to this rule. One of which is silane, SiH₄. A hydrogen atom only has 1 valence electron and needs another electron to complete its energy level. This is unlike other atoms, for example, carbon which has 4 valence electrons and needs to form 4 covalent bonds to fill its energy levels. Thus, 4 hydrogen atoms need only 4 more electrons. This is given by the silicon atom which has 4 valence electrons. Therefore, when a silicon atom is bonded to 4 hydrogen atoms, the resulting molecule, SiH₄, is a stable one.
You might be interested in
Step 2: Now that you have counted the atoms on each side, add coefficients to balance the equation. Check your work by updating
Alja [10]

Answer:

The answers to your questions are given below.

Explanation:

__ NaBr + CaF₂ —> __ NaF + CaBr₂

The above equation can be balance as follow:

NaBr + CaF₂ —> NaF + CaBr₂

There are 2 atoms of F on the left side and 1 atom on the right side. It can be balance by writing 2 before NaF as shown below:

NaBr + CaF₂ —> 2NaF + CaBr₂

There are 2 atoms of Na on the right side and 1 atom on the left side. It can be balance by writing 2 before NaBr as shown below:

2NaBr + CaF₂ —> 2NaF + CaBr₂

Now, the equation is balanced.

Atom >>>> Reactant >>>> Product

Na >>>>>> 2 >>>>>>>>>>> 2

Br >>>>>>> 2 >>>>>>>>>>> 2

Ca >>>>>> 1 >>>>>>>>>>>> 1

F >>>>>>> 2 >>>>>>>>>>>> 2

5 0
2 years ago
What is the wavelength of light emitted between the 3 rd and 1 st energy levels? 121.5 nm 94.5 nm 102.5 nm 1875 nm
Sauron [17]
I think it is 102.5 not for sure
5 0
3 years ago
Vitamin c is known chemically by the name ascorbic acid determine the empirical formula of ascorbic acid if it is composed of 40
kow [346]

Answer:

=C_3H_4O_3

Explanation:

When percentage composition is given, and asked for the empirical formula, it is simplest to  assume 100 g of material. Thus,

Mass C = 40.92 g.  Moles C = 40.92 g x 1 mole/12 g = 3.41 moles C

Mass H = 4.58 g.  Moles H = 4.58 g x 1 mole/1.0 g = 4.58 moles H

Mass O = 54.50 g.  Moles O = 54.50 g x 1 mole/16 g = 3.41 moles O

Now, we want to get the moles into whole numbers, so we begin by dividing all by the smallest, i.e. divide all values by 3.41.

Moles C = 3.41/3.41 = 1

Moles H = 4.58/3.41 = 1.34

Moles O = 3.41/3.41 = 1

Now, in order to get 1.34 to be a whole number we multiply it (and all others) by 3

Moles C = 1x3 = 3

Moles H = 1.34x3 = 4

Moles O = 1x3 = 3

Empirical Formula =C_3H_4O_3

3 0
3 years ago
The percent yield for the reaction in which 15.6g of aluminum hydroxide is reacted in excess hydrogen chloride gas is 92.5%. Wha
Misha Larkins [42]

Answer:

24.6 g

Explanation:

4 0
3 years ago
Why pure hydrogen is not used in ballons ?​
wariber [46]

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

pls mark brainliest

8 0
2 years ago
Other questions:
  • How many significant figures are there in 0.0080?
    6·1 answer
  • PLEASE HELP!!! I am taking a college chem class as a junior and have no idea how to do this!
    10·1 answer
  • HELP ME PLZ!!!!
    8·1 answer
  • Which molecule is nonpolar?<br> (1) H2O (3) CO<br> (2) NH3 (4) CO2
    6·2 answers
  • In the reaction, Zn(s) + 2 HCl(aq) --&gt; ZnCl2 (aq)+ H2(g), 25 grams of Zn are reacted with 17.5 g of HCl. How many grams of H2
    13·1 answer
  • Which statement is true about a base when it reacts with another substance?
    15·2 answers
  • What is an Independent Variable (IV)? *
    7·1 answer
  • What can you determine about an element if you only know its group number on the periodic table?
    6·2 answers
  • Help pls I really need the answer I will brainlest​
    5·2 answers
  • Why is methanol written as ch3oh instead of ch4o?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!