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
Paraphin [41]
2 years ago
8

I don’t understand this question and need help!!

Chemistry
1 answer:
Dafna1 [17]2 years ago
6 0
Medium about 3 second? Not sure lol just need more points honestly lol
You might be interested in
What is a tough, rigid, outer covering that protects some cells and gives them shape?
jeyben [28]
It iscalled the "cell wall"
7 0
3 years ago
Which of the following elements is the most reactive?<br> A. Ba<br> B. Cs<br> C. Hf<br> D. Lu
hodyreva [135]

Answer: Cs because its further to the right on the table, meaning its more reactive.

Explanation:

8 0
3 years ago
A thermometer shows that the temperature of the air in a room has increased.Which type of energy has increased?
liberstina [14]

Kinetic energy has increased.

The <em>Kinetic Molecular Theory</em> of gases states that the average kinetic energy of the molecules of a gas is directly proportional to its Kelvin temperature.

Thus, if the temperature of the air in a room has increased, the average kinetic energy of its molecules has increased.


5 0
3 years ago
What is the relationship between the number of gas particles and volume ?
choli [55]

Answer:

V ∝ n  

Step-by-step explanation:

Suppose that pressure and temperature are constant.

If you try to force more molecules of air into a balloon, the balloon will expand.

This is an example of <em>Avogadro's Law</em>: the volume of a gas is directly proportional to the number of moles (particles).

V ∝ n

8 0
3 years ago
In the flame test, barium ions produce a green flame whereas calcium ions produce a red flame. In your own words, explain these
deff fn [24]

Answer:

The Barium flame is green because it is a difficult flame to excite, therefore for it to trigger a flame it is necessary that it be too excited for it to occur.

The reddish color of calcium is due to its high volatility and it is sometimes very difficult to differentiate it from strontium.the compression of these elements is due to being able to make them work during combustion

Explanation:

The flame test is a widely used qualitative analysis method to identify the presence of a certain chemical element in a sample. To carry it out you must have a gas burner. Usually a Bunsen burner, since the temperature of the flame is high enough to carry out the experience (a wick burner with an alcohol tank is not useful). The flame temperature of the Bunsen burner must first be adjusted until it is no longer yellowish and has a bluish hue to the body of the flame and a colorless envelope. Then the tip of a clean platinum or nichrome rod (an alloy of nickel and chromium), or failing that of glass, is impregnated with a small amount of the substance to be analyzed and, subsequently, the rod is introduced into the flame, trying to locate the tip in the least colored part of the flame.

The electrons in these will jump to higher levels from the lower levels and immediately (the time that an electron can be in higher levels is of the order of nanoseconds), they will emit energy in all directions in the form of electromagnetic radiation (light) of frequencies characteristics. This is what is called an atomic emission spectrum.

At a macroscopic level, it is observed that the sample, when heated in the flame, will provide a characteristic color to it. For example, if the tip of a rod is impregnated with a drop of Ca2 + solution (the previous notation indicates that it is the calcium ion, that is, the calcium atom that has lost two electrons), the color observed is brick red .

3 0
3 years ago
Read 2 more answers
Other questions:
  • Recycled r134a refrigerant cannot exceed what levels of contaminants
    15·1 answer
  • What three things are required for combustion?
    10·2 answers
  • The space where fast moving electrons are likely to be found in an atom is called the electron
    13·2 answers
  • Which of the following types of energy equals the total energy of motion and position
    9·1 answer
  • Both of the carbon-oxygen double bonds in co2 are polar. in which direction should the polarity arrows point?
    9·1 answer
  • For the reaction N2(g)+O2(g)⇌2NO(g)N2(g)+O2(g)⇌2NO(g) classify each of the following actions by whether it causes a leftward shi
    12·1 answer
  • What is the identity of the element with the electron configuration of
    7·1 answer
  • How could both phone and tv break in the collision?​
    14·1 answer
  • In a heat engine, 500 J of heat enters the system, and the piston does 300 J of work. What is the final internal (thermal) energ
    5·1 answer
  • Suppose there was a release of 1 mole of Alpha emission particle and 1 mole of Beta emission particles and both particles are ac
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!