3 years ago

Which of the following is an example of a compound?

Chemistry

1 answer:

VladimirAG [237]3 years ago

3 0

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

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What do the objects in motion have in common

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All objects in motion do posses kinetic energy.

Explanation:

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How many pi bonds are in the oxalate ion (C2O42-)?

suter [353]

Answer:there are 13

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Explain why magnesium and aluminium react in a similar way?

postnew [5]

Because magnesium loses its electrons easily than aluminum

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n a coffee cup calorimeter, 100.0 mL of 1.0M NaOH and 100.0 mL of 1.0M HCl are mixed. Both solutions were originally at 24.6 deg

RoseWind [281]

Answer:

Explanation:

mass of the solution = volume x density = 200 x 1 = 200 gm

heat absorbed = m x s x Δ t , s is specific heat , Δt is rise in temperature

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3 years ago

What is the frequency of radiation whose wavelength is 2.51 x 10 -7m?

hodyreva [135]

The frequency of radiation : 1.2 x 10¹⁵ Hz

<h3>Further explanation </h3>

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

$\large{\boxed{\bold{E\:=\:h\:.\:f}}}$

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

c = speed of light

= 3.10⁸ m/s

λ = wavelength

Wavelength-λ is 2.51 x 10⁻⁷m

The frequency :

$\tt f=\dfrac{3.10^8}{2.51\times 10^{-7}}=1.2\times 10^{15}$

8 0

3 years ago