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
hoa [83]
2 years ago
5

An adaptation is best described as occurring over which time scale? *

Chemistry
1 answer:
dezoksy [38]2 years ago
3 0

Answer:

over many eras

Explanation:

You might be interested in
How many carbon atoms are there in .500 mol of CO2?
AURORKA [14]

Answer: There are 3.011 \times 10^{23} atoms present in 0.500 mol of CO_{2}.

Explanation:

According to the mole concept, there are 6.022 \times 10^{23} atoms present in 1 mole of a substance.

In a molecule of CO_{2} there is only one carbon atom present. Therefore, number of carbon atoms present in 0.500 mol of CO_{2} are as follows.

1 \times 0.500 \times 6.022 \times 10^{23}\\= 3.011 \times 10^{23}

Thus, we can conclude that there are 3.011 \times 10^{23} atoms present in 0.500 mol of CO_{2}.

6 0
3 years ago
Helium decays to form lithium
Fantom [35]
Not sure if this was a true or false but ok great job it is true. :)
5 0
3 years ago
Read 2 more answers
What do you understand by shared pair of electron ​
PilotLPTM [1.2K]

Answer:Lone pairs are the valence electron pair of any element which do not take part in bonding but affect the shape of molecules. Bond pairs or shared pairs are the electron pair which does both affect the geometry of molecules and take part in chemical bonding. These are form due to sharing of electrons.

Explanation:

5 0
3 years ago
According to the collision theory and model created to explain the collision theory, what two factors must be satisfied for a gi
storchak [24]
The answer is correct orientation and sufficient energy. Answer choice D
4 0
3 years ago
Read 2 more answers
How many grams of zinc would be required to produce 9.65g of zinc hydroxide
Effectus [21]

The question is incomplete, here is the complete question:

How many grams of zinc would be required to produce 9.65g of zinc hydroxide

Zn+2MnO₂+H₂O→Zn(OH)₂+Mn₂O₃

<u>Answer:</u> The mass of zinc required is 6.35 grams

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}     .....(1)

Given mass of zinc hydroxide = 9.65 g

Molar mass of zinc hydroxide = 99.4 g/mol

Putting values in equation 1, we get:

\text{Moles of zinc hydroxide}=\frac{9.65g}{99.4g/mol}=0.0971mol

The given chemical equation follows:

Zn+2MnO_2+H_2O\rightarrow Zn(OH)_2+Mn_2O_3

By Stoichiometry of the reaction:

1 mole of zinc hydroxide is produced from 1 mole of zinc

So, 0.0971 moles of zinc hydroxide will be produced from = \frac{1}{1}\times 0.0971=0.0971mol of zinc

Now, calculating the mass of zinc from equation 1, we get:

Molar mass of zinc = 65.4 g/mol

Moles of zinc = 0.0971 moles

Putting values in equation 1, we get:

0.0971mol=\frac{\text{Mass of zinc}}{65.4g/mol}\\\\\text{Mass of zinc}=(0.0971mol\times 65.4g/mol)=6.35g

Hence, the mass of zinc required is 6.35 grams

6 0
3 years ago
Other questions:
  • A 0.8838-g sample of an ionic compound containing bromide ions and an unknown metal cation is dissolved in water and treated wit
    8·2 answers
  • which weapons did germany used when they had war with Ussr? and which weapons did Ussr used during the war?​
    8·1 answer
  • Which are formed as glaciers retreat and leave debris behind in mounds at the front of their farthest advance?
    8·1 answer
  • How can you determine the number of protons in the nucleus of an atom of any of the elements listed in the table?
    6·1 answer
  • PLEASE HELP
    5·1 answer
  • I need help with this answer
    9·1 answer
  • Which atomic model was proposed as a result of J. J. Thomson’s work?
    13·2 answers
  • Evaporation is a process that requires energy to occur. Evaporation is ain)<br> reaction
    6·1 answer
  • A hurricane is MOST LIKELY to occur in an area
    10·1 answer
  • What is the change in internal energy (ΔΕ) of a system when 5 kJ of work is done on the system while it releases 13 kJ of energy
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!