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Paul [167]
4 years ago
6

Which characteristic describes bases?

Chemistry
2 answers:
MakcuM [25]4 years ago
7 0

Answer:

feel slippery

Explanation:

they feel slippery in the hands when touched

shusha [124]4 years ago
5 0

Answer:

feel slippery

Explanation:

Bases are certain metallic oxides, metallic hydroxides and aqueous ammonia. They typically have the following characteristics;

  1. The aqueous solution of many of them have a bitter taste.
  2. The aqueous solutions of bases have soapy or slippery feel and the strong bases are very caustic to the skin.
  3. Their aqueous solutions have a pH greater than 7.
  4. Bases have the ability to change the color of indicators.
  5. They are conduct electricity and are said to be electrolytes.

From the choices given, the fitting answer is that bases have a slippery feel.

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Be sure to answer all parts. ΔG o for the reaction H2(g) + I2(g) ⇌ 2HI(g) is 2.60 kJ/mol at 25°C. Calculate ΔG, and predict the
daser333 [38]

Answer:

∆G = 1.567 kJ/mole

The reaction is nonspontaneous., or will be spontaneous in the reverse direction

Explanation:

<u>Step 1:</u> The balanced equation

H2(g) + I2(g) ⇌ 2HI(g)        2.60 kJ/mol at 25°C.

<u>Step 2:</u> Data given

The initial pressures are:

pH2 = 3.10 atm

pI2 = 1.5 atm

pHI = 1.75 atm

<u>Step 3: </u>Calculate Q

Kp = (pHI)^2 / (pH2)(pI2)

Q has the same form but we substitute the non-equilibrium values given in the problem.

Q = (1.75)² / (3.10*1.5) = 0.659

<u>Step 4:</u> Calculate gibbs free energy

∆G = ∆G˚ + RTlnQ = 2600 J/mole + (8.31 J/mole K)(298 K)(ln 0.659) = 2600 J/mole - 1032.729 J/mole

= 1567.271‬ J/mole = 1.567 kJ/mole

Interpret ∆G:

∆G > 0 the reaction is nonspontaneous., or will be spontaneous in the reverse direction

∆G < 0 the reaction is spontaneous.

If ∆G  = 0 the reaction is essentially at equilibrium.

∆G = 1.567 kJ/mole

The reaction is nonspontaneous., or will be spontaneous in the reverse direction

3 0
3 years ago
Calculate the volume of a balloon filled with 0.0940 grams of helium, given the fact that the density of helium is 0.179 g/L
yanalaym [24]

Answer:

Answer: 1.027 x 10^6 g= 1027kg

In this question, you are given the volume of the blimp (2.027×10^5 ft^3) and the density of the gas(0.179g/L). To answer this question, you need to convert the volume unit into liter. The calculation would be: 2.027×10^5 ft^3 x 28.3168L/ft3= 57.398 x 10^5L= 5.74x10^6L

Then to find the mass, multiply the volume with the density. The calculation would be: 5.74x10^6L x 0.179g/L= 1.027 x 10^6 g= 1027kg

Explanation:

i hope it helps

6 0
3 years ago
HeLlo, HeLp Me PleAsE, Ill MaRk YoU BrAiNlIeSt !
evablogger [386]
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2>

\huge\boxed{Option C}

<h2>_____________________________________</h2><h2>CALORIMETER:</h2>

Calorimeter is device used for the measurement of heat. In a calorimeter we can use the temperature change of water to quantify an amount of heat.  A calorimeter just captures all the energy released (or absorbed) by a reaction in the water. So Option A and B are wrong as calorimeter don't have anything to do with providing the heat or letting the the heat in, as it is the insulated calorimeter too.

<h2>_____________________________________</h2><h2>Energy in the reaction:</h2>

In the formation of any bond there is equal amount of heat required as to break that bond. It means Energy released in the making of bond is equal to the energy required in the breaking of the bond. So Option D is wrong as it says we need more energy in making then breaking.

<h2>_____________________________________</h2><h2>Enthalpy:</h2>

Enthalpy is the total heat content of the system. As we provide energy to the reactants and the product is formed, so The enthalpy(heat content) of product is more than the Enthalpy of the reactant, Thus Option C is correct.

Enthalpy is denoted by H or Q, its formula is,

                                       H = U + PV

Where,

           U is internal energy

           PV is equals to Work done ; P = Pressure, V = Volume

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2>        </h2>
5 0
3 years ago
5
torisob [31]

Answer:

Increasing the current would strengthen the

<u>electromagnetisn</u>

8 0
3 years ago
A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 a
Alona [7]
T1=298.15K, P1=0.96 atm, P2=1.25 atm, T2=?
(P1/T1)=(P2/T2)
(0.96)/(298.15)=(1.25)/(T2)
(1.25)/((.96)/(298.15))=T2
T2=388.2161458K
T2=115.0661 degrees Celsius
7 0
3 years ago
Read 2 more answers
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