What is the total number of atoms in the following formula? CaBr2

Answers

Answer 1
Answer: There is 3 atoms.
Ca + 2 BR = 3 Atoms
Answer 2
Answer: 3 atoms are the total number of atoms

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Gas pressure in a closed system is caused by _____.

Answers

Answer:

rapid diffusion of gas throughout the system

Explanation:

It is caused by she system letting off fumes and making gas pressure.

The horizontal sweep of an oscilloscope is rated ina. volts/division
b. amps/division
c. seconds/division
d. ohms/divisionthe horizontal sweep of an oscilloscope is rated in seconds/division.

Answers

C is the correct answer

Answer:

Second division

Explanation:

What formula can be used to calculate [H30+]?

Answers

[H3O+] is just the same with [H+]. There are quite a few relationships between [H+] and [OH−] ions. And because there is a large range of number between 10 to 10-15 M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+ ][OH- ] = 10-14. 

The combined gas law relates which of the following? a. pressure and volume only
b temperature and pressure only
c. volume and temperature only
d. temperature, pressure, and volume

Answers

Reffering to its definition, the combined gas law relates d. temperature, pressure, and volume

Final answer:

The combined gas law relates temperature, pressure, and volume and can be represented by the equation P1V1 / T1 = P2V2 / T2.

Explanation:

The combined gas law relates temperature, pressure, and volume. It states that the product of the initial pressure, volume, and temperature of a gas is equal to the product of the final pressure, volume, and temperature. This law can be represented by the equation:

P1V1 / T1 = P2V2 / T2

where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures.

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If a car decreases from 35m/s to 25/ms after 15 seconds what is its acceleration

Answers

Answer:

2 m/ s2.

Explanation:

2 m/ s2.

Acceleration = (final speed - initial speed) divided by total time taken.

= (25–15) divided by 5

10 divided by 5 gives an acceleration of 2 metres per second per second.

If you were trying to build a soundproof room, which of the following materials would you choose in order to absorb the most sound, based on the coefficient of absorption for each material?        A. Heavy curtains   B. Wood   C. Concrete   D. Carpet

Answers

The material that would absorb the most sound is Heavy curtains (Option A)

What material absorbs the most sound?

The effectiveness of a material in absorbing sound is typically measured by its coefficient of absorption.

The coefficient of absorption ranges from;

  • 0  (perfectly reflective, no sound absorption) to
  • 1  (perfectly absorptive, all sound is absorbed)

Based on the coefficient of absorption for each material listed, the best choice for sound absorption would be Heavy curtains.

Heavy curtains are often designed with sound-absorbing properties, and they can have a coefficient of absorption higher than other materials like wood, concrete, or carpet.

The ranking of the absorption of the materials are;

Heavy curtains (0.5)  >  Carpet (0.2) > Wood (0.05) > Concrete (0.02)

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Coefficients of Absorption for Common Materials

(from Penn Foster) ⭐⭐⭐⭐⭐

Material                                            Coefficient of Absorption

Perforated acoustic ceiling material                              60%

Heavy curtains  (A)                                                            50%

Carpeting  (D)                                                                     20%

Wood  (B)                                                                              5%

Plaster                                                                                  3%

Clay tile                                                                                 3%

Concrete (C)                                                                         2%

The answer is A. Heavy curtains ✅