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
serg [7]
3 years ago
13

How does the fossil record suggest common ancestry?

Chemistry
1 answer:
Jobisdone [24]3 years ago
6 0

Answer:

  • the first one is: Fossils provide evidence that organisms from the past are not the same as those found today, and demonstrate a progression of evolution. Scientists date and categorize fossils to determine when the organisms lived relative to each other.
You might be interested in
What is the location on the surface directly above the earthquake focus called? A. epicenter B. fault C. Moho D. foci
cupoosta [38]

the answer is A. epicenter :)


5 0
3 years ago
Read 2 more answers
A sample of gas occupies a volume of 61.5 mL . As it expands, it does 130.1 J of work on its surroundings at a constant pressure
Lesechka [4]

Answer:

the final volume of the gas is V_2 = 1311.5 mL

Explanation:

Given that:

a sample gas has an initial volume of 61.5 mL

The workdone = 130.1 J

Pressure = 783 torr

The objective is to determine the final volume of the gas.

Since the process does 130.1 J of work on its surroundings at a constant pressure of 783 Torr. Then, the pressure is external.

Converting the external pressure to atm ; we have

External Pressure P_{ext}:

P_{ext} = 783 \ torr \times \dfrac{1 \ atm}{760 \ torr}

P_{ext} = 1.03 \ atm

The workdone W = P_{ext}V

The change in volume ΔV= \dfrac{W}{P_{ext}}

ΔV = \dfrac{130.1 \ J  \times \dfrac{1 \ L  \ atm}{ 101.325 \ J}  }{1.03 \ atm }

ΔV = \dfrac{1.28398717 }{1.03  }

ΔV = 1.25 L

ΔV = 1250 mL

Recall that the initial  volume = 61.5 mL

The change in volume V is \Delta V = V_2 -V_1

-  V_2= -  \Delta V  -V_1

multiply through by (-), we have:

V_2=   \Delta V+V_1

V_2 =  1250 mL + 61.5 mL

V_2 = 1311.5 mL

∴ the final volume of the gas is V_2 = 1311.5 mL

5 0
2 years ago
20 ML of a gas at 200 K is heated until the new volume is 55ML what is the final temperature of the gas
MrRa [10]

Answer:

T2 = 550K

Explanation:

From Charles law;

V1/T1 = V2/T2

Where;

V1 is initial volume

V2 is final volume

T1 is initial temperature

T2 is final temperature

We are given;

V1 = 20 mL

V2 = 55 mL

T1 = 200 K

Thus from V1/T1 = V2/T2, making T2 the subject;

T2 = (V2 × T1)/V1

T2 = (55 × 200)/20

T2 = 550K

8 0
2 years ago
What is the direction of the polarity of the indicated bond in h3c−oh marked by δ+ and δ−?
Sedbober [7]

Answer:- The direction of the polarity of the indicated bond is from carbon to oxygen.

Explanations:-  There are two types of covalent compounds, polar and non polar. If the bond is between two same atoms for example, H-H, Cl-Cl etc then the bond is non polar. If the bond is between two different atoms then the bond would be polar. The direction of the polarity is from loss electron negative atom to more electron negative atom.

Oxygen is more electron negative than carbon. So, being more electron negative, the bonding electrons are more towards oxygen and it cases partial negative charge on oxygen and partial positive charge on carbon. The direction of the polarity is from less electron negative carbon to more electron negative oxygen.

It is shown in the diagram below:


6 0
3 years ago
Never mind wrong question
Leokris [45]
Its okay my friend. you dont need to over stress it.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which formulas represent one iconic compound and one molecular compound
    12·1 answer
  • What criteria are used to distinguish between a chemical change and a physical change
    9·1 answer
  • Which of the following best describes the relationship between products and reactants in an exothermic reaction?
    6·2 answers
  • Plz help Which is an example of an abiotic factor interacting with a biotic factor in an ecosystem?
    6·1 answer
  • Which of the following sequences of elements would all have four valence electrons?
    15·1 answer
  • Identify the correct formula for ammonia.
    7·1 answer
  • Estado de oxidación de doro​
    13·1 answer
  • An object has a mass of 441 g and a volume
    15·1 answer
  • 2. Have someone hold the mirror for you, slowly move at least 3 m away from the it.
    8·1 answer
  • What must happen in order for atoms to bond either lonically or covalently with one another?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!