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3 years ago

Which element is most likely to gain an electron? hydrogen 1

Chemistry

2 answers:

MAVERICK [17]3 years ago

7 0

Answer:

Explanation:

Fluorine has the highest EN value. so F can receive electron the most when compare to other elements.

lilavasa [31]3 years ago

7 0

Elements that are metals tend to lose electrons and become positively charged ions called cations. Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions. So, if you are asking would hydrogen most likely gain electrons the answer would be yes it would gain electrons.

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A 44.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 22.0 ml of koh at 25 ∘c.

Helga [31]

The reaction between KOH and HBr is as follows ;
KOH + HBr ---> H₂O + KBr
Stoichiometry of base to acid is 1:1 molar ratio
Both are strong acid and strong base therefore complete ionization takes place
The number of KOH moles added - 0.50 M / 1000 mL/L x 22 mL = 0.011 mol
the number of HBr moles - 0.25 M /1000 mL/L x 44 mL = 0.011 mol
the number of H⁺ ions and OH⁻ ions are equal therefore the whole amount of acid has been completely neutralised by base.
No remaining acid nor base, therefore solution is neutral.
pH = 7
thats the pH value for a neutral solution

4 0

4 years ago

How can quartzite be distinguished from quartz sandstone?

mash [69]

D. A broken piece of quartzite will break through, not around, quartz sand grains.

Quartzite and quartz sandstone have the same chemical formula (SiO_2)

Quartzite is a metamorphic rock. Heat and pressure have compressed the sand into a strong network of interlocking quartz grains.

Quartzite is so tough that it breaks through the sand grains rather than around them as in sandstone.

7 0

4 years ago

Read 2 more answers

A 30.0 g sample of a metal was heated in a hot water bath to 80°c. it was then quickly transferred to a coffee-cup calorimeter.

Annette [7]

when the metal is lost heat and the calorimeter of water is gained the heat

and when the heat lost = the heat gained so,

(M*C*ΔT)m = (M*C*ΔT)w

when Mm= mass of the metal = 30 g

Δ Tm = (80-25) = 55 °C

and Mw = mass of water = 100 g

Cw is the specific heat of water = 4.181 J/g.°C

ΔTw = (25-20) = 5 °C

so by substitution:

∴ 30* Cm*55 = 100 * 4.181 * 5

∴Cm (specific heat of metal) = (100*4.181*5)/(30*55)

∴C of metal = 1.267 J/g.°C

3 0

4 years ago

Read 2 more answers

Suppose you have 81.8 g of Cd. How many Cd atoms are present? Report your answer in scientific notation using the format of 6.02

Lostsunrise [7]

Answer:

1. number of Cd atoms = 4.384 × 10²³

2. number of moles of Ti = 0.817 mol

3. molar mass of C₇H₆O₃ = 138.077 g/mol

4. moles of Sildenafil = 0.249 mmol

Explanation:

1. given data

mass of Cd = 81.8 g

number of Cd atoms = ?

molar mass of Cd = 112.411 g/mol

Solution

1st we find out the number of moles of Cd

number of moles = mass / molar mass

number of moles of Cd = 81.8 g / 112.411 g.mol⁻

number of moles of Cd = 0.728 mol

Now we find out the number of Cd atoms

number of atoms = moles × 6.022 × 10²³

number of Cd atoms = 0.728 (6.022 × 10²³)

number of Cd atoms = 4.384 × 10²³

2. Given data

Mass of Ti = 39.1 g

moles = ?

molar mass Ti = 47.867 g/mol

Solution

Now we will find out the number of moles

number of moles = mass / molar mass

number of moles of Ti = 39.1 g / 47.867 g.mol⁻

number of moles of Ti = 0.817 mol

3. Given data

chemical formula of Salicylic acid = C₇H₆O₃

molar mass of salicylic acid = ?

molar mass of carbon = 12.011

molar mass of hydrogen = 1.008

molar mass of oxygen = 15.999

molar mass of molecule = number of moles of atoms × molar mass of atoms

molar mass of C₇H₆O₃ = 7 (12.011) + 6 (1) + 3 (16)

molar mass of C₇H₆O₃ = 84.077 g + 6 g + 48 g

molar mass of C₇H₆O₃ = 138.077 g/mol

4. Given data

molar mass of Sildenafil = 474.5828 g/mol

mass given = 0.118 g

moles of Sildenafil = ?

Solution

Now we find out the number of moles

number of moles = mass / molar mass

number of moles Sildenafil = 0.118 g / 474.5828 g/mol

number of moles Sildenafil = 0.0003 mol

as this is very small amount we convert it into millimoles

millimoles = moles × 1000

millimoles of Sildenafil = 0.000249 × 1000

millimoles of Sildenafil = 0.249 mmol

4 0

3 years ago

Suppose you wish to separate a mixture of fine particles of gold and sand, neither of which is soluble in water. if you add liqu

Greeley [361]

The mixture can be separated as shown in the flow chart

4 0

3 years ago