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mina [271]
3 years ago
6

A sample of Ca(OH)2 is considered to be an Arrhenius base because it dissolves in water to yield

Chemistry
2 answers:
postnew [5]3 years ago
8 0
The answer is C. Arrhenius bases increase the concentration of OH- in solution.
Oksi-84 [34.3K]3 years ago
4 0

Answer : The correct option is, (C) OH^- ions as the only negative ions in solution

Explanation :

According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion (H^+) and a bases is a substance that ionizes in the water to give hydroxide ion (OH^-).

A sample of Ca(OH)_2 is considered to be an Arrhenius base because when it dissolves in the water to yield OH^- ions as the only negative ions in solution.

Hence, the correct option is, (C)

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The pressure in a car tire is 178 kPa at 37°C. After a long drive, the pressure is 275 kPa. What is
dimaraw [331]

Answer:

T₂ = 478.93 K

Explanation:

Given that,

Initial pressure, P₁ = 178 kPa

Initial temperature, T₁ = 37°C = 310 K

Final pressure, P₂ = 275 kPa

We need to find the new temp of the air in the tire, assuming the volume is constant. We know that,

\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{275\times 310}{178}\\\\T_2=478.93 K

So, the new temperature is equal to 478.93 K.

3 0
3 years ago
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5 0
3 years ago
Of the five NASA space shuttles, which one flew the most missions?
Irina-Kira [14]

Endeavour is the youngest shuttle in NASA's orbiter fleet, and was built as a replacement for Challenger. The shuttle flew 25 missions over the course of its spaceflying career, logging a total of 122,883,151 miles (197,761,261 km) on its odometer. Endeavour launched on its maiden flight, STS-49, on May 7, 1992.

8 0
3 years ago
What is the pH of a solution with a [H+] of 1.0 x 10-4 M?
MaRussiya [10]
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4 0
3 years ago
According to Archimedes' principle, the mass of a floating object equals the mass of the fluid displaced by the object. A 150-lb
julsineya [31]

Answer:

The density of the swimmer is 0.0342 lbm/in3.

This value makes sense as the density of the body is very similar to the water.

Explanation:

If the swimmers is floating, the weight of the swimmer must be equal to the upward buoyant force.

We can express the weight force as the product of density and volume of the swimmer.

Then

\rho_{swimmer}*V_{swimmer}=\rho_{water}*V_{water_displaced}\\\\\rho_{swimmer}*V_{swimmer}=\rho_{water}*0.95**V_{swimmer}\\\\\rho_{swimmer}=0.95*\rho_{water}\\\\\rho_{swimmer}=0.95*0.036 lbm/in3\\\\\rho_{swimmer}=0.0342lbm/in3

It makes sense as the density of the body is very similar to the water.

5 0
3 years ago
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