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4 years ago

Electromagnetic waves heat earths surface through convection?

1 answer:

4 0

Heat moves in three ways:Radiation, conduction, and convection. Radiation happens when heat moves as energy waves, call infrared waves,directly from its source to something else.This is how the heat from the Sun gets to Earth.In fact,all hot things radiate heat to cooler things:).hope this helps

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What is the atomic number of magnesium?

nika2105 [10]

Magnesium's atomic number is 12

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3 years ago

Ok I'm playing minecraft I have 30 levels and a full enchantment room, what's better using thirty levels on a diamond axe of a d

laila [671]

Answer:

diamond axe

Explanation:

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3 years ago

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What pressure (in kilopascals) is exerted by 4.20 moles of Xenon gas in a 15.0 L container at 280.0 K?

aniked [119]

Answer: the pressure exerted by the gas is 652 x 10^3 Pa, which corresponds to 652 kPa

Explanation:

The question requires us to calculate the pressure, in kPa, connsidering the following information:

number of moles = n = 4.20mol

volume of gas = V = 15.0L

temperature of gas = T = 280.0 K

We can use the equation of ideal gases to calculate the pressure of the gas, as shown by the rearranged equation below:

$PV=nRT\rightarrow P=\frac{nRT}{V}$

Since the volume was given in L and the question requires us to calculate the pressure in kPa, we can use R in units of L.Pa/K.mol:

R = 8314.46 L.Pa/K.mol

Applying the values given by the question to the rearranged equation above, we'll have:

$\begin{gathered} P=\frac{nRT}{V} \\ \\ P=\frac{(4.20mol)\times(8314.46L.Pa/K.mol)\times(280.0K)}{(15.0L)}=652\times10^3Pa \end{gathered}$

Therefore, the pressure exerted by the gas is 652 x 10^3 Pa, which corresponds to 652 kPa.

8 0

1 year ago

Hybridization of NH3

nadya68 [22]

Answer:

Sp3 hybridization

Explanation:

The NH3 molecule, which consists of one lone pairs and three bond pair of electron on its valance shell due to lone pair bond pair repulsion makes bond angle of 107.5°resulting distorted tetrahedral geometry.

Hybridization =no. of bond pair +lone pair=3+1=4=sp3 hybridization

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3 years ago

What's the ionic compound formula for zinc bicarbonate

raketka [301]

Zn(HCO3)2 is the compound for Zinc Bicarbonate

6 0

3 years ago

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