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
spayn [35]
2 years ago
12

Help me answer this chemistry question. thank you!

Chemistry
1 answer:
Vladimir [108]2 years ago
7 0

Answer:

Noble gases

Explanation:

hope it helps

You might be interested in
Physical and chemical properties of a piece of cooked chicken and a glass of kool-aid
Lunna [17]
A cooked chicken would be somewhat burnt or cooked. A glass of kool aid would be mixed, or aka homogenous mixture. The glass would maintain a color, because its not water. 
6 0
3 years ago
How many milliliters of 0.0896M LiOH are required to titrate 25.0 mL of 0.0759M HBr to the equivalence point?
slavikrds [6]

Answer:

V_{LiOH}=21.8mL

Explanation:

Hello,

In this case, during titration at the equivalence point, we find that the moles of the base equals the moles of the acid:

n_{LiOH}=n_{HBr}

That it terms of molarities and volumes we have:

M_{LiOH}V_{LiOH}=M_{HBr}V_{HBr}

Next, solving for the volume of lithium hydroxide we obtain:

V_{LiOH}=\frac{M_{HBr}V_{HBr}}{M_{LiOH}} =\frac{0.0759M*25.0mL}{0.0896M} \\\\V_{LiOH}=21.8mL

Best regards.

8 0
2 years ago
using the Bohr model for hydrogen: energy = hc/wavelength = 2.18 x 10^-18 Joules (1/nf2 - 1/ni2) N=15 to n=5
soldier1979 [14.2K]

Answer:

Energy lost is 7.63×10⁻²⁰J

Explanation:

Hello,

I think what the question is requesting is to calculate the energy difference when an excited electron drops from N = 15 to N = 5

E = hc/λ(1/n₂² - 1/n₁²)

n₁ = 15

n₂ = 5

hc/λ = 2.18×10⁻¹⁸J (according to the data)

E = 2.18×10⁻¹⁸ (1/n₂² - 1/n₁²)

E = 2.18×10⁻¹⁸ (1/15² - 1/5²)

E = 2.18×10⁻¹⁸ ×(-0.035)

E = -7.63×10⁻²⁰J

The energy lost is 7.63×10⁻²⁰J

Note : energy is lost / given off when the excited electron jumps from a higher energy level to a lower energy level

5 0
3 years ago
Reading the Temperature of Thermometers
Anna71 [15]

Answer:37.0,42.5

Explanation:

3 0
3 years ago
If 500.0 mL of 0.450 M sodium phosphate is reacted with an excess of iron (II) nitrate solution, how many grams of iron (II) pho
Maurinko [17]

Answer:

If 500.0 mL of 0.450 M sodium phosphate is reacted with an excess of iron (II) nitrate solution, how many grams of iron (II) phosphate are produced?

idk

Explanation:

8 0
3 years ago
Other questions:
  • Calcium hydroxide reacts with carbon dioxide to form calcium carbonate (balanced equation given below). if you start with 155 ml
    5·1 answer
  • The fact that all living organisms can be classified into distinct families, groups, and orders provides _ which supports the Sc
    14·1 answer
  • A student balances the following redox reaction using half-reactions.
    12·2 answers
  • The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportiona
    7·1 answer
  • How much heat energy is required to raise the temperature of 0.367 kg of copper from 23.0 C to 60.0 C ? The specific heat of cop
    13·1 answer
  • A tank at is filled with of dinitrogen difluoride gas and of chlorine pentafluoride gas. You can assume both gases behave as ide
    6·1 answer
  • What elements are in the star sirius?
    5·1 answer
  • In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.4 from a free electron that is initially at
    13·1 answer
  • How much heat does it take to turn water from -30 degreesC to 120 degreesC?
    5·2 answers
  • What are the answers??
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!