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3 years ago

Show how water can serve as a base by showing the chemical equation of water reacting with hydrochloric acid. g

1 answer:

8 0

So, water reacts with hydrochloric acid in the following formula

H2O + HCl —-> H3O+ + Cl-

We can visualize that when the two react, the hydrogen ions is taken on by the water molecule. This satisfies one of the definitions for a base

Bronsted acids = anything that donates a proton (H+ ion)

Bronsted bases = anything that accepts a proton (H+ ion)

So, as we can see, that is exactly what is happening. The Cl- and H+ detach and then the water takes on that extra H+.

H3O+ is what we call a hydronium ion

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Gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . What is the theoretical yiel

Effectus [21]

Answer:

1) Write the balanced equation:

2C2H6 + 7O2 ---> 4CO2 + 6H2O

2) Determine limiting reagent:

C2H6 ⇒ 13.8 g / 30.0694 g/mol = 0.45894 mol

O2 ⇒ 45.8 g / 31.9988 g/mol = 1.4313 mol

C2H6 ⇒ 0.45894 / 2 = 0.22947

O2 ⇒ 1.4313 / 7 = 0.20447

Oxygen is limiting.

3) Determine theoretical yield of water:

The oxygen : water molar ratio is 7 : 6

7 is to 6 as 1.4313 mol is to x

x = 1.2268286 mol of water

4) Convert moles of water to grams:

1.2268286 mol times 18.015 g/mol = 22.1 g (to three sig figs)

Solution to (b):

14.2 g / 22.1 g = 64.2%

Explanation:

8 0

3 years ago

A fan blade rotates with angular velocity given by ωz(t)= γ − β t2, where γ = 5.20 rad/s and β = 0.810 rad/s3 . calculate the an

Gnesinka [82]

Answer : The angular acceleration is $\alpha=-\beta t=-0.810\text{ t}$

Solution : Given,

$\gamma=5.20rad/s$

$\beta=0.810rad/s^3$

The given angular velocity equation is,

$\omega_z(t)=\gamma-\beta t^2$

At t = 0, $\omega_z(0)=\gamma$

At t = t, $\omega_z(t)=\gamma-\beta t^2$

Angular acceleration : It is defined as the rate of change of angular velocity with respect to time.

Formula used for angular acceleration :

$\alpha=\frac{\omega_z(t)-\omega_z(0)}{t}$

where,

$\alpha$ = angular acceleration

$\omega_z(t)$ = angular velocity at time 't'

$\omega_z(0)$ = angular velocity at time '0'

t = time

Now put all the given values in this formula, we get the angular acceleration.

$\alpha=\frac{(\gamma)-(\gamma-\beta t^2)}{t}$

$\alpha=-\beta t=-0.810\text{ t}$

Therefore, the angular acceleration is $\alpha=-\beta t=-0.810\text{ t}$

5 0

3 years ago

Which is a property of ionic compounds? soft and brittle low boiling point able to conduct electricity low melting point?

leonid [27]

Ionic compound generally has high melting point due to the strong ionic bond. It is also hard but brittle because repulsion between oppositely charged ions will occur if force is applied. It is soluble in water but insoluble in non-aqueous solvent. It can only conduct electricity when molten or in aqueous solution and undergo chemical decomposition upon conducting electricity.

4 0

3 years ago

Read 2 more answers

The heat capacity of air is much smaller than that of water, and relatively modest amounts of heat are needed to change its temp

LekaFEV [45]

Answer:

$Q=9.2x10^5J$

$t=614s=10.2min$

Explanation:

Hello,

In this case, we can compute the energy by using the following formula for air:

$Q=nCp\Delta T$

Whereas the moles of air are computed via the ideal gas equation at room temperature inside the 5.5m x 6.5m x 3.0m-room:

$n=\frac{PV}{RT}\\\\V=5.5m*6.5m*3.0m=107.25m^3*\frac{1000L}{1m^3}=107250L\\ \\n=\frac{1atm*107250L}{0.082\frac{atm*L}{mol*K}*298.15K}\\ \\n=4386.8mol$