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MrRa [10]
3 years ago
13

One difference between strong bases and weak bases is 1. strong bases can neutralize more acid than weak bases. 2. strong bases

release more hydroxide ions than weak bases. 3. only strong bases can be amphiprotic. 4. weak bases dissociate completely; strong bases do not. 5. strong bases dissociate completely; weak bases do not.
Chemistry
1 answer:
Tema [17]3 years ago
6 0
One difference between strong bases and weak bases is that a strong bases dissociate completely while weak bases do not. A strong base is a compound that completely ionizes into metal and hydroxide ions when in a solution, on the other hand weak bases only partially ionizes to metal and hydroxide ions in solution. An example of a weak base is ammonia and an example of a strong base is sodium hydroxide.
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A student was asked to determine the densities of the four metals listed. The student was asked to determine the density of an u
Iteru [2.4K]

Answer:

D is correct

Explanation:

because

we know that

density of lead is 11.36 g/cm3

and

density of tin is 7.31 g/cm3

so..

density of alloy by mixing 50/50

=(11.36+7.31)/2 g/cm3

=18.67/2 g/cm3

=9.33 g/cm3

5 0
3 years ago
How many moles are in 39.5 grams of Lithium?
Blizzard [7]

Answer:

185.05 g.

Explanation

Firstly, It is considered as a stichiometry problem.

From the balanced equation: 2LiCl → 2Li + Cl₂

It is clear that the stichiometry shows that 2.0 moles of LiCl is decomposed to give 2.0 moles of Li metal and 1.0 moles of Cl₂, which means that the molar ratio of LiCl : Li is (1.0 : 1.0) ratio.

We must convert the grams of Li metal (30.3 g) to moles (n = mass/atomic mass), atomic mass of Li = 6.941 g/mole.

n = (30.3 g) / (6.941 g/mole) = 4.365 moles.

Now, we can get the number of moles of LiCl that is needed to produce 4.365 moles of Li metal.

Using cross multiplication:

2.0 moles of LiCl → 2.0 moles of Li, from the stichiometry of the balanced equation.

??? moles of LiCl → 4.365  moles of Li.

The number of moles of LiCl that will produce 4.365 moles of Li (30.3 g) is (2.0 x 4.365 / 2.0) = 4.365 moles.

Finally, we should convert the number of moles of LiCl into grams (n = mass/molar mass).

Molar mass of LiCl = 42.394 g/mole.

mass = n x molar mass = (4.365 x 42.394) = 185.05 g.

7 0
2 years ago
Read 2 more answers
Plz answer the question in the picture.
astra-53 [7]

Answer:

a

Explanation:

a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

5 0
3 years ago
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How many molecules of water are there in 1 gram of water​
alisha [4.7K]

Answer:

6.022*1023

Explanation:

3 0
2 years ago
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In a hydrogen atom, the electron and the proton are seperated by about 0.5 angstroms, 5.0×10−11 m. what is the acceleration of a
nadya68 [22]

The charge of proton and electron is equal in magnitude that is 1.6\times 10^{-19} C. The distance between electron and proton is 0.5 \AA or 5\times 10^{-11} m.

Force exerted on electron by proton is calculated as follows:

F= \left | \frac{kq_{e}q_{p}}{r^{2}} \right |

Here, k is Coulomb's constant, q_{p} is charge on proton,  q_{e} charge on electron and r is distance between them.

Putting the values,

F= \left | \frac{(8.99\times 10^{9}N m^{2}/C^{2})(1.6\times 10^{-19} C)(1.6\times 10^{-19} C)}{(5\times 10^{-11} m)^{2}} \right |=9.2\times 10^{-8} N

Now, according to second law of Newton,

F=m_{e}a

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Also, 1 N=1 kgm/s^{2}

Rearranging,

a=\frac{F}{m_{e}}=\frac{9.2\times 10^{-8} Kg m/s^{2}}{9.11\times 10^{-31} kg}=1.01\times 10^{23} m/s^{2}

Thus, the acceleration of an electron in this atom is 1.01\times 10^{23} m/s^{2}.


7 0
3 years ago
Read 2 more answers
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