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
Arte-miy333 [17]
3 years ago
7

Which of the following is NOT a symbol for an element? H Li Pb HF

Chemistry
2 answers:
sp2606 [1]3 years ago
3 0
HF because an element is always a capital then a lowercase letter
ohaa [14]3 years ago
3 0
HF because an element always has a capital letter first then a lowercase.
You might be interested in
PLEASE HURRY LIMITED TIME
Stolb23 [73]
3rd one sorry if it’s wrong
3 0
2 years ago
Using the example of an ambulance, explain the Doppler Effect. Infer why the doppler effect can or cannot occur in all waves. PL
kozerog [31]

Answer:

When the ambulance is coming towardss you the waves are smushed together and sound higher pitched but then it passes you and when tracveling away the waves are scretched out so the whee whoo sounds lower and that is because of the doppler effect

6 0
3 years ago
The following system is at equilibrium:
Delvig [45]

Answer:

1) No shift

2) No shift

3) Leftward shift

4)Rightward sifht

Explanation:

1) 2) Adding N or Removing N in the equilibrium will produce No shift, because of its solid state, the N is not contemplated in the equilibrium equation:

K=\frac{[L]^2}{[M]^3}

3) Increasing the volume produces a decrase in the preassure due to the expansion of the gases. This will cause a leftward shift, because the system will try to increase the moles of gas and in consecuence of this, also increase the preassure.

4) Decreasing the volume has the opposite effect of the item 3): the preassure will increase and the system will consume moles of gas to decrease it, producing a rightward shift.

3 0
3 years ago
A molecular orbital is a region of space in a covalent species where electrons are likely to be found. The combination of two at
lara [203]

Answer:

bonding molecular orbital is lower in energy

antibonding molecular orbital is higher in energy

Explanation:

Electrons in bonding molecular orbitals help to hold the positively charged nuclei together, and they are always lower in energy than the original atomic orbitals.

Electrons in antibonding molecular orbitals are primarily located outside the internuclear region, leading to increased repulsions between the positively charged nuclei. They are always higher in energy than the parent atomic orbitals.

5 0
2 years ago
How can the rate constant be determined from the rate law?
Vinil7 [7]

Answer:

B. The rate constant is the reaction rate divided by the concentration

terms.

Explanation:

The rate constant can be determined from the rate law because it is the reaction rate divided by the concentration terms. I hope I could help! :)

7 0
2 years ago
Other questions:
  • An equilibrium mixture of CO, O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0100 M O2. At this temperature, Kc
    11·2 answers
  • A 10kg bowling ball would require what force to accelerate down an alleyway at a rate of 3m/s2?
    6·1 answer
  • What is the correlation between pressure and elevation for an ideal gas?
    9·1 answer
  • Which trait is shown when scientists ignore their personal bias while assessing an idea?
    6·2 answers
  • The critical role of the atmosphere is best described as ?
    15·1 answer
  • How many atoms are in 3CaCO3
    10·1 answer
  • Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant?
    8·1 answer
  • Use your data to form hypothesis relating the amount of light to the rate of photosynthesis.
    8·2 answers
  • Which product in the reaction forms a precipitate? PbSO4 MgCl2 PbMg no precipitate formed
    9·1 answer
  • A sample of neon gas in a bulb is at 149.05 °C and 349.84 kPa. If the pressure drops
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!