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
SashulF [63]
3 years ago
13

Plz answer fast :) ...................

Chemistry
1 answer:
Alenkasestr [34]3 years ago
6 0

Answer:

helium (c

Explanation:

:)

You might be interested in
What is the kinetic energy of the ball precisely 4 seconds after it starts falling?
allochka39001 [22]

it depends how heavy and how far it travels


3 0
3 years ago
Calculate the volume of a sample of mercury with a density of 14.6 g/mL and a mass of 1.00 g. The answer is assumed to be in mL.
Darya [45]

Answer:

0.0685 mL

Explanation:

To find the volume of the sample, divide the mass by the density.

(1.00 g)/(14.6 g/mL) = 0.0685 mL

3 0
3 years ago
10. At 573K, NO2(g) decomposes forming NO and O2. The decomposition reaction is second order in NO2 with a rate constant of 1.1
leva [86]

Answer:

48.67 seconds

Explanation:

From;

1/[A] = kt + 1/[A]o

[A] = concentration at time t

t= time taken

k= rate constant

[A]o = initial concentration

Since [A] =[A]o - 0.75[A]o

[A] = 0.056 M - 0.042 M

[A] = 0.014 M

1/0.014 = (1.1t) + 1/0.056

71.4 - 17.86 = 1.1t

53.54 = 1.1t

t= 53.54/1.1

t= 48.67 seconds

Hence,it takes 48.67 seconds to decompose.

6 0
3 years ago
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transit
Lapatulllka [165]

<u>Answer:</u> The wavelength of spectral line is 656 nm

<u>Explanation:</u>

To calculate the wavelength of light, we use Rydberg's Equation:

\frac{1}{\lambda}=R_H\left(\frac{1}{n_f^2}-\frac{1}{n_i^2} \right )

Where,

\lambda = Wavelength of radiation

R_H = Rydberg's Constant  = 1.097\times 10^7m^{-1}

n_f = Final energy level = 2

n_i= Initial energy level = 3

Putting the values in above equation, we get:

\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{2^2}-\frac{1}{3^2} \right )\\\\\lambda =\frac{1}{1.524\times 10^6m^{-1}}=6.56\times 10^{-7}m

Converting this into nanometers, we use the conversion factor:

1m=10^9nm

So, 6.56\times 10^{-7}m\times (\frac{10^9nm}{1m})=656nm

Hence, the wavelength of spectral line is 656 nm

6 0
3 years ago
Balance NaOH + H3PO4-&gt;H2O + Na3PO4
Masteriza [31]

Answer:

3NaOH + H3PO4 ---> 3H2O + Na3PO4

Explanation:

7 0
3 years ago
Other questions:
  • How many molecules of sulfur trioxide would react with 68.9 L of water at STP to produce sulfuric acid? SO3 + H2O H2(SO4)
    11·1 answer
  • Mg(s) + ½O2(g) → MgO(s) + 146 kcal/mole H2(g) + ½O2(g) → H2O(g), ΔH = -57.82 kcal/mole What type of reaction is represented by t
    10·1 answer
  • The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic attraction holding that compound
    6·1 answer
  • Salt solutions can be __________ to give solid salts. What word completes this sentence?
    14·1 answer
  • ____ is the process of adding a known amount of solution of known concentration to determine the concentration of another soluti
    10·1 answer
  • What type of molecular model is most accurate to the shape of a molecule?
    13·1 answer
  • Issues guidelines for financial system operated by all commerical banks in India​
    12·1 answer
  • Some people have one sickle cell gene and one normal gene. They have few defctive cells and no symptoms because the sickle cell
    7·1 answer
  • Bari oxit có công thức hóa hóa học là BaO . vậy bari oxit được tạo nên từ các nguyên tố
    7·1 answer
  • How many molecules are in 3.5 moles of hydrogen
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!