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
DochEvi [55]
3 years ago
11

20 points please help

Chemistry
1 answer:
exis [7]3 years ago
6 0

The answer should be A, flammability.


The isotopes of the same element would result in the same chemical properties, as the number of protons and electrons are not changed, meanwhile, the physical properties would be slightly different with each other because they have different numbers of electrons.


Out of the 4 options, only option A is a chemical property. Chemical properties are the properties of an element reacting with other substances that creates new substances at the end. While physical properties are the ones that does not produces new substances or any reactions. They are usually observable and measurable.


Therefore, since flammability is a chemical property, the answer is A.

You might be interested in
Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 162. kJ during a certain chemical reaction, w
puteri [66]

Answer:

= -356KJ

<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>

Explanation:

given that enthalpy of gaseous reactants decreases by 162KJ and workdone is -194KJ

then,

change in enthalpy (ΔH) = -162( released energy)

work(w) = -194KJ

change in enthalpy is said to be negative if the heat is evolved during the reaction while heat change(ΔH) is said to be positive if the heat required for the reaction occurs.

At constant pressure the change in enthalpy is given as

ΔH = ΔU + PΔV

ΔU = change in energy

ΔV = change in volume

P = pressure

w =  -pΔV

therefore,

ΔH = ΔU -W

to evaluate  energy change we have,

ΔU =ΔH + W

ΔU = -162+ (-194KJ)

= -356KJ

<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>

6 0
3 years ago
An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns
-Dominant- [34]

Answer:

D ) feedback

Explanation:

When we use an air conditioner, it get turn off when reaches its required temperature and when the house warm up the air conditioning unit turns on again, that is an example of feedback.

The given condition is an example of negative feedback because in negative feedback, any change in the input is opposed by generating an output. Here also,  warming up of house (change in one direction) allows the air conditioning unit turns  on and it gives cool air (opposing that change).

Hence, the correct option is "D".

4 0
3 years ago
What is the pun when I go from here to there quickly on foot
zlopas [31]
1. A type of mens cologne
2. A police officers boss
3. When i go from here to there quickly on foot

Idk thats what google said
6 0
3 years ago
Aonde a civilização egípcia se desenvolvera​
Lorico [155]
A civilização egípcia se desenvolveu ao longo do rio Nilo em grande parte porque as enchentes anuais do rio garantiam um solo rico e confiável para o cultivo.
3 0
3 years ago
What's a standard unit of measurement?
pishuonlain [190]
A standard unit of measurement is inches.
8 0
3 years ago
Other questions:
  • A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. H
    5·1 answer
  • The equation, H2SO4 (aq) + Sr(OH)2 (aq) arrow SrSO4 (aq) + H2O (l), represents what?
    6·2 answers
  • When atoms combine they form<br> A. molecules<br> B.periodic table<br> C.particles<br> D.protons
    12·1 answer
  • A concrete barrier in a parking lot a structure of mass, frame, or shell? Which one would it be?
    14·1 answer
  • How many hydrogen atoms are present in 2.00mg of aspartame
    5·2 answers
  • What is the energy of an electromagnetic wave with a frequency of 8•10^12 Hz?
    9·1 answer
  • Write short note on<br>vegetation ​
    5·1 answer
  • How are force, mass, and motion related?
    10·2 answers
  • Isoniazid is used in the treatment of tuberculosis and multiple sclerosis. Identify each lone pair as either localized or deloca
    13·1 answer
  • Question 14 of 25
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!