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4 years ago

Describe electronegativity, and explain the trend of electronegativity in the Periodic Table.

1 answer:

8 0

Electronegativity is an atoms ability to attract a bonding pair of electrons. Fluorine is the most electronegative element. Electronegativity increases across the periodic table from left to right. It also increases from bottom to top.

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Which is part of the hydrosphere? lightning plants clouds squirrels

kozerog [31]

Clouds I believe because hydro means water and clouds are made of water

5 0

3 years ago

Read 2 more answers

A balloon is filled with air. It has a volume of 720 mL at a temperature of 22°C. You put

liubo4ka [24]

Charles's Law.

V1  = V2

T1 T2

V1 = 720 mL

T1 = 22°C

T2 = 106°C

V2 = ?

then,

720 = V2

22 106

V2 = 3469 mL

5 0

2 years ago

A photon of light with a frequency of 2.74 x 1014 Hz collides with an electron. How much energy

sesenic [268]

Answer:

1.82x10⁻¹⁹Joules is the energy of the photon that is absorbed by the electron.

Explanation:

The energy of a photon is given by the equation:

E = h×ν

Where E is energy of the photon in Joules.

h is Planck's constant (6.6262x10⁻³⁴Js)

And ν is frequency of the photon (In Hz = s⁻¹)

The frequency of the photon is 2.74x10¹⁴Hz. That means its energy is:

E = 6.6262x10⁻³⁴Js × 2.74x10¹⁴s⁻¹

E =

<h3>1.82x10⁻¹⁹Joules is the energy of the photon that is absorbed by the electron</h3>

4 0

3 years ago

For the following gases, correct the volumes to the conditions indicated. A.654 cm3 at 6 degrees Celsius and 65.3 kPa to 4 degre

leva [86]

Initial pressure of the gas = 65.3 kPa

Initial volume of the gas = 654 cm³

Initial temperature of the gas = 6⁰C = 273 + 6 = 279 K

Final pressure of the gas = 108.7 kPa

Final temperature of the gas = 4⁰C = 273 + 4 = 277 K

Using the combined gas law for ideal gases:

P₁V₁/T₁ = P₂V₂/T₂

where P₁, V₁ and T₁ are the pressure, volume and temperature for the initial state and P₂, V₂ and T₂ are the pressure, volume and temperature for the final state.

Plugging the given data into the combined gas law we have,

(65.3 kPa x 654 cm³) / (279 K) = (108.7 kPa x V₂)/(277 K)

V₂ = (65.3 kPa x 654 cm³ x 277 K) / (279 K x 108.7 kPa)

V₂ = 390.1 cm³

8 0

3 years ago

what mass of copper is produce when Zinc is added to a solution containing 31.9g copper (ii) tetraoxosulphate (vi)

Sergio [31]

12.7 grams of copper will be produced.

<h3>Explanation:</h3>

Copper is placed below zinc in the metal activity series. This means zinc can replace copper from its salt. Here zinc is added to the salt solution of copper sulphate. The reaction involved is

CuSO4 +Zn =ZnSO4 +Cu.

Zinc sulphate is soluble in the solution and rose red copper will be precipitated from the solution.

From the chemical equation we can see that 1 mole of zinc replaces 1 mole of copper. As no mass of zinc added is mentioned we will assume that excess of zinc is added.

Atomic mass of copper = 63.5

Atomic mass of sulphur = 32.

Atomic mass of oxygen = 16.

So molecular mass of copper sulphate = $63.5 + 32 + 4\times16$ = 159.5.

So, mass of 1 mole of copper sulphate is 159.5 grams.

So, in 31.9 grams of copper sulphate, number of moles of copper sulphate present = $\frac {159.5}{31.9}$ = 0.2

In 1 mole of copper sulphate, 1 mole of copper is present.

So in 0.2 moles of copper sulphate, 0.2 moles of copper is present.

So mass of 0.2 moles of copper = $0.2\times63.5$ = 12.7 grams

8 0

4 years ago