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
gtnhenbr [62]
3 years ago
14

You notice that when the parchment paper of an ancient document is exposed to a certain chemical, the parchment paper becomes a

different color. what have you done?
Chemistry
1 answer:
const2013 [10]3 years ago
5 0
You have done a chemical change
You might be interested in
The CO2 produced in one round of the citric acid cycle does not originate in the acetyl carbons that entered that round. If the
aleksley [76]

Answer:

It will require<u> second round</u> of the cycle to release 14C0_2

Explanation:

<u>Reason behind the requirement of second round of the cycle to release </u>CO_2 -:

The C4 carbon of succinyl CoA is acetyl from acetyl CoA. Succinyl CoA is converted to succinate, which is then converted to fumarate, fumarate, malate, and eventually oxaloacetate. 14C will be found in oxaloacetate at either C1 or C4. During the second round of the loop, each of these carbons will be converted to carbon dioxide.

7 0
3 years ago
Which of the following is the best definition of a scientific theory? A predicted experimental outcome A mathematical model (an
Mkey [24]

Answer:

A well tested explanation of a natural phenomenon

Explanation:

A scientific theory is an explanation of a natural phenomenon which has been drawn from a well tested observation.

Theories are products of repeated scientific experiments. When a hypothesis otherwise known as a "scientific guess" survives a lot of scrutiny, we can elevate it to the status of a theory. Most theories starts off from simple observations. These observations can further spark series of experiments in such a field and a scientific guess proposed. Further testing and experimenting would now lead to a theory.

7 0
3 years ago
PLEASE HELP ME!!!
ohaa [14]

Answer:

1045

Answer: 1045 J of energy was released on cooling the down the water from 20 °C to 10 °C.

4 0
3 years ago
Read 2 more answers
Calculate the percent errorin a length measurementof 4.45cm if the correct value is 4.06
FinnZ [79.3K]

Answer:

9.6 %

Explanation:

<u>Step 1: How to define  percent error ? </u>

⇒ % error is the difference between a measured value and the known or accepted value

⇒Percent error is calculated using the following formula:

⇒%error  =  | Experimental value-theoretical value/theoretical value |  x100%

⇔ this can be written as well as : error = (| Experimental value/ theoretical value | - | Theoretical value / Theoretical value | ) x100%

<u>Step 2: Calculate % error</u>

In this case, this means :

%error = ( |(4.45 cm - 4.06cm ) / 4.06cm | ) x100%

%error = 0.096 x100%

%error =9.6 %

3 0
3 years ago
Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine
Nostrana [21]
D. CuCl2 copper(2)chloride 
4 0
3 years ago
Other questions:
  • Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used?
    12·1 answer
  • How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal
    6·1 answer
  • Is mass conserved in chemical reactions? Make a prediction based on this question. Be sure to tell how you would determine wheth
    6·1 answer
  • An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass?
    8·2 answers
  • Give the ion symbol for the the ion that has 15 protons and 18 electrons
    5·2 answers
  • Calculate the amount of nacl needed to prepare 50 ml of 0.9% nacl solution and 20% nacl solution
    13·1 answer
  • Draw the Lewis structures of N2, O2, H20, and CH4. Compare your drawing to the ones in the drawing on this test and select
    6·1 answer
  • Why concentrated acid is hazardous material​
    5·2 answers
  • Describe one way the respiratory and nervous system work together​
    11·1 answer
  • How many dekagrams are in a kilogram​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!