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
mote1985 [20]
3 years ago
15

Which two technologies use reflected sound waves

Chemistry
1 answer:
katen-ka-za [31]3 years ago
4 0

Answer: The answer is B.Sonar and C.Radar

Explanation:

They are both just like an echo which is the main things that uses reflected sound waves. They are basically like synonyms for echo.

You might be interested in
Calculate the Molarity when 14.6 g Ethanol (C2H5OH) is dissolved in a 2.10 L solution.
Nana76 [90]
The molarity is 0.151 mol/L
Hope it helps.
5 0
3 years ago
Name two helper organs in the digestive system that food does not pass through
Gala2k [10]
The pancreas, liver, and gallbladder. Hope that helps!
8 0
3 years ago
Read 2 more answers
The actual yield of a certain reaction is 38.0 g, while the
pashok25 [27]

Answer:

D. 76%

Explanation:

Percent yield=actual/theoretical * 100

38/50 * 100 = 76%

5 0
3 years ago
The equilibrium constant for the reaction 2x(g)+y(g)=2z(g) is 2.25 . what would be the concentration of y at equilibrium with 2
Troyanec [42]

[\text{Y}] \approx0.337\;\text{mol}\cdot\text{dm}^{-3} at equilibrium.

<h3>Explanation</h3>

Concentration for each of the species:

  • [\text{X}] = \dfrac{n}{V} = 2\; \text{mol}\cdot \text{dm}^{-3};
  • [\text{Y}] = \dfrac{n}{V} = 0\; \text{mol}\cdot \text{dm}^{-3};
  • [\text{Z}] = \dfrac{n}{V} = 3\; \text{mol}\cdot \text{dm}^{-3}.

There was no Y to start with; its concentration could only have increased. Let the change in [\text{Y}] be +x \; \text{mol}\cdot \text{dm}^{-3}.

Make a \textbf{RICE} table.

Two moles of X will be produced and two moles of Z consumed for every one mole of Y produced. As a result, the <em>change</em> in [\text{X}] will be +2\;x \; \text{mol}\cdot \text{dm}^{-3} and the <em>change</em> in [\text{Z}] will be -2\;x \; \text{mol}\cdot \text{dm}^{-3}.

\begin{array}{l|ccccc}\textbf{R}\text{eaction}&2\; \text{X}\; (g) & + &\text{Y}\; (g) & \rightleftharpoons &2 \; \text{Z}\; (g)\\\textbf{I}\text{nitial Condition}\; (\text{mol}\cdot\text{dm}^{-3})& 2 & &0 & & 3 \\\textbf{C}\text{hange in Concentration}\; (\text{mol}\cdot\text{dm}^{-3})\;& +2\;x & &+x &&-2\;x\\\textbf{E}\text{quilibrium Condition}\; (\text{mol}\cdot\text{dm}^{-3})& & &&&\end{array}.

Add the value in the C row to the I row:

\begin{array}{l|ccccc}\textbf{R}\text{eaction}&2\; \text{X}\; (g) & + &\text{Y}\; (g) & \rightleftharpoons &2 \; \text{Z}\; (g)\\\textbf{I}\text{nitial Condition}\; (\text{mol}\cdot\text{dm}^{-3})& 2 & &0 & & 3 \\\textbf{C}\text{hange in Concentration}\; (\text{mol}\cdot\text{dm}^{-3})\;& +2\;x & &+x &&-2\;x\\\textbf{E}\text{quilibrium Condition}\; (\text{mol}\cdot\text{dm}^{-3})& 2 + 2\;x & &x&&3-2\;x\end{array}.

What's the equation of K_c for this reaction? Raise the concentration of each species to its coefficient. Products go to the numerator and reactants are on the denominator.

K_c = \dfrac{[\text{Z}]^{2}}{[\text{X}]^{2} \cdot[\text{Y}]}.

K_c = 2.25. As a result,

\dfrac{[\text{Z}]^{2}}{[\text{X}]^{2} \cdot[\text{Y}]} = \dfrac{(3-2x)^{2}}{(2+2x)^{2} \cdot x} = K_c = 2.25.

(3-2\;x)^{2}= 2.25 \cdot(2+2\;x)^{2} \cdot x\\4\;x^{2} - 12 \;x + 9 = 2.25 \;(4\;x^{3} + 8 \;x^{2} + 4 \;x)\\4\;x^{2} - 12\;x + 9 = 9 \;x^{3} + 18\;x^{2} + 9\;x\\9\;x^{3} + 14\;x^{2} + 21\;x - 9 = 0.

The degree of this polynomial is three. Plot the equation y = 9\;x^{3} + 14\;x^{2} + 21\;x - 9 on a graph and look for any zeros. There's only one zero at x \approx 0.337. All three concentrations end up greater than zero.

Hence the equilibrium concentration of Y: 0.337\;\text{mol}\cdot\text{dm}^{-3}.

7 0
3 years ago
How many moles are equivalent to 300.0 grams of Uranium?
Sveta_85 [38]

Answer:

There are 1.260 moles for every 300.0 grams of Uranium

Explanation:

8 0
3 years ago
Other questions:
  • How does matter change from one state to another?
    5·1 answer
  • Select the correct answer. A certain reaction has this form: aA bB. At a particular temperature and [A]0 = 2.00 x 10-2 Molar, co
    12·1 answer
  • What is the role of neutrons in an atom??
    8·2 answers
  • Clouds can form in all the following ways except
    5·1 answer
  • The wavelength of a pendulum on a string is 3.5 meters and its speed is 4.5 m/s. What is its frequency?
    15·1 answer
  • How much of a concentrated 7.3 M NaCl solution would I need to dilute with water to make 50.0 mL of a new NaCl solution with 2.3
    11·1 answer
  • Como se escribe K2O ennomemclatura estequimetrica y stock​
    15·1 answer
  • Can someone tell me what this is ?
    10·2 answers
  • As far as water is concerned, if you the same mass of ice and the same mass of liquid water - will it take more energy to melt t
    11·1 answer
  • How is fission different than alpha or beta decay?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!