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3 years ago

13

Convert 9.5 x 10^23

1 answer:

Talja [164]3 years ago

3 0

What is this, atoms, moles, grams?
Convert it into what?

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Hurry. NO Spam! Write the neutralization reaction that occurs between HF and LiOH.

tekilochka [14]

Answer:

HF + LiOH = LiF + H2O.

Explanation:

Hydofluoric acid is a weak acid the solution would be slightly basic due to the following equilibrium (condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs.)

Hope that helps. x

4 0

3 years ago

12. Which of the planets in the solar system

lianna [129]

Between 1858 and 1920, Mars was thought by many, including some scientists, to be very similar to Earth, only drier with a thick atmosphere, similar axial tilt, orbit and seasons as well as a Martian civilization that had built great Martian canals.

4 0

3 years ago

A solution contains 0.45 M hydrofluoric acid (HF; KA = 6.8 X 10−4). Write the dissociation reaction. Determine the degree of ion

Gala2k [10]

Answer:

Degree of ionization = 0.0377

pH of the solution = 1.769

Explanation:

Initial concentration of HF = 0.45 M

$K_a = 6.8 \times 10^{-4}$

$HF \leftrightharpoons H^+ + F^-$

Initial 0.45 0 0

At equi 0.45 - x x x

Equilibrium constant = $\frac{[H^+][F^-]}{HF}$

$6.8 \times 10^{-4}= \frac{[x][x]}{0.45 - x}$

$x^2 + 6.8 \times 10^{-4} x - 6.8 \times 10^{-4} \times 4.5 = 0$

x = 0.017 M

x = Cα

α = Degree of ionization

C = Concentration

Degree of ionization = $\frac{0.017}{0.45} = 0.0377$

$pH = -log[H^+]$

[H^+]=0.017 M

$pH = -log[0.017]$

= 1.769

6 0

4 years ago

Si + 2Cl2 + SiC14

Maru [420]

59.43 grams of SiCl4 is formed when 10.0 grams of Si and 60.0

grams of Cl2 react.

Explanation:

Data given:

mass of Si = 10 grams

mass of chlorine gas = 60 grams

molar mass of Si = 28 grams/mole

molar mass of chlorine gas = 70.9 grams/mole

molar mass of Si $Cl_{4}$ = 169.8 grams/mole

Balanced equation:

Si + 2 $Cl_{2}$ ⇒ Si $Cl_{4}$

moles of Si = $\frac{mass}{atomic mass of 1 mole}$

moles of Si = $\frac{10}{28}$

moles of Si =0.35 moles

moles of chlorine gas = $\frac{60}{70.9}$

moles of chlorine gas = 0.84 moles

from the balance reaction,

1 mole of Si gives 1 mole of Silicon tetrachloride

0.35 moles of Si will give 0.35 moles of silicon tetrachloride

mass = atomic mass x number of moles

mass = 169.8 x 0.35

mass = 59.43 grams

2 moles of chlorine gas gives 1 mole of silicon tetrachloride

0.84 moles of chlorine will give

0.84 x 2 moles= 1.68 moles of silicon tetrachloride

mass = 1.68 x 169.8

= 285.26 grams

Mass of silicon tetrachloride fromed is 59.43 grams as silicon is the limiting reagent.

3 0

3 years ago

Atoms are known to form charges due to their ability to gain and lose electrons in reactions. As a result, atoms become ions tha

Ivahew [28]

Answer:

C

Explanation:

Na has an electron configuration of 2,8,1

it forms an ion by losing 1 electron thus gaining a 1+ charge

5 0

3 years ago

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