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3 years ago

Arrange the following in order of increasing

Chemistry

1 answer:

Reptile [31]3 years ago

7 0

Answer:

Explanation:

The increasing order of energy of electromagnetic radiations is,

Radio wave∠ micro waves ∠ infrared radiations ∠ visible light ∠ ultraviolet ∠ x-rays ∠ gamma rays

1) visible radiation, ultraviolet radiation, infrared radiation, microwaves, x-rays

microwaves ∠ infrared radiation ∠ visible radiation ∠ ultraviolet radiation ∠ x-rays

2) microwaves, ultraviolet radiation, visible radiation, infrared radiation, x-rays

microwaves ∠ infrared radiation ∠ visible radiation ∠ ultraviolet radiation ∠ x-rays

3) microwaves, infrared radiation, visible radiation, ultraviolet radiation, x-rays

microwaves ∠ infrared radiation ∠ visible radiation∠ ultraviolet radiation, ∠ x-rays

4) x-rays, microwaves, visible radiation, infrared radiation, ultraviolet radiation

microwaves ∠ infrared radiation ∠ visible radiation∠ ultraviolet radiation, ∠ x-rays

5) . infrared radiation, visible radiation, ultraviolet radiation, microwaves, x-rays

microwaves ∠ infrared radiation ∠ visible radiation∠ ultraviolet radiation, ∠ x-rays

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3 years ago

Matter is anything that has mass and takes up space. Which units of measurement can you use to describe these two properties?

elena-s [515]

Answer:

Explanation:

The SI unit for density is the kilogram per cubic meter (kg/m3 ).

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3 years ago

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Place the following elements in order of increasing electronegativity.K Cs PA. K < P < CsB. P < Cs < KC. Cs < K &

skad [1K]

Answer:

C. Cs < K < P

Explanation:

Electronegativity is the basically the tendency of an atom to attract electrons. The pauling scale is used to quantify electronegativity, the most electronegative element; fluorine has a value of 4.0 and francium, the least electronegative element has a value of 0.7

The electronegative values of the following elements are given as;

K = 0.82

Cs =0.79

P = 2.19

Arranging in order of increasing electronegativity, we have;

Cs < K < P. The correct option is;

C. Cs < K < P

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3 years ago

Estimate the number of moles of water in all the Earth's oceans. Assume water covers 75% of the Earth to an average depth of 3 k

o-na [289]

Answer:

there are approximately n ≈ 10²² moles

Explanation:

Since the radius of the earth is approximately R=6378 km= 6.378*10⁶ m , then the surface S of the earth would be

S= 4*π*R²

since the water covers 75% of the Earth's surface , the surface covered by water Sw is

Sw=0.75*S

the volume for a surface Sw and a depth D= 3 km = 3000 m ( approximating the volume through a rectangular shape) is

V=Sw*D

the mass of water under a volume V , assuming a density ρ= 1000 kg/m³ is

m=ρ*V

the number of moles n of water ( molecular weight M= 18 g/mole = 1.8*10⁻² kg/mole ) for a mass m is

n = m/M

then

n = m/M = ρ*V/M = ρ*Sw*D/M = 0.75*ρ*S*D/M = 3/4*ρ*4*π*R² *D/M = 3*π*ρ*R² *D/M

n=3*π*ρ*R² *D/M

replacing values

n=3*π*ρ*R² *D/M = 3*π*1000 kg/m³*(6.378*10⁶ m)² *3000 m /(1.8*10⁻² kg/mole) = 3*π*6.378*3/1.8 * 10²⁰ = 100.18 * 10²⁰ ≈ 10²² moles

n ≈ 10²² moles

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3 years ago

What parts of microscope that enlarge the object once seen under the microscope

vaieri [72.5K]

Answer:

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3 years ago

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