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Stella [2.4K]
3 years ago
12

What causes the phases of the moon? A) The amount of sunlight reflected onto the moon from the sun B) The Moon Earth and Sun are

lined up in the same place C) It is closer to the Earth at times and further from the earth at other times D) The effect of gravity
Chemistry
1 answer:
sdas [7]3 years ago
5 0

A.) The amount of sunlight reflected onto the moon from the sun

Just like the Earth, half of the Moon is lit by the Sun while the other half is in darkness. The phases we see result from the angle the Moon makes with the Sun as viewed from Earth. The lit side does not always face the Earth, as the Moon circles the Earth, the amount of the lit side we see changes.

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Which is the function of the skull​
Mashcka [7]
supports the structures of the face and forms a cavity for the brain and protects the brain from harm
3 0
3 years ago
Read 2 more answers
Suppose a liquid level from 5.5 to 8.6 m is linearly converted to pneumatic pressure from 3 to 15 psi. What pressure will result
wlad13 [49]

Answer:

a) P = 9.58 psi for  h=7.2 m

b) P=4.7 psi for h=5.94 m

Explanation:

Since the pressure Pon a static liquid level h is

P= p₀ + ρ*g*h

where p₀= initial pressure , ρ=density , g = gravity

then he variation of the liquid level Δh will produce a variation of pressure of

ΔP= ρ*g*Δh → ΔP/Δh =  ρ*g = ( 15 psi - 3 psi) /( 8.6 m - 5.5 m)  = 12/3.1 psi/m

if the liquid level is converted linearly

P = P₁ + ΔP/Δh*(h -h₁)

therefore choosing  P₁ = 3 psi and h₁= 5.5 m , for h=7.2 m

P = 3 psi  + 12/3.1 psi/m *(7.2 m -5.5 m) = 9.58 psi

then P = 9.58 psi for  h=7.2 m

for P=4.7 psi

4.7 psi = 3 psi  + 12/3.1 psi/m *(h -5.5 m)

h = (4.7 psi - 3 psi)/ (12/3.1 psi/m) + 5.5 m = 5.94 m

then P=4.7 psi for h=5.94 m

5 0
4 years ago
2 Na2O + CO = Na2CO3 + Na
Vikki [24]

Moles of Na_2O

  • Given mass/Molar mass
  • 35/62
  • 0.56mol

2 mols Na_2O produces 1 mol sodium carbonate.

1 mol sodium oxide produces 0.5mol sodium carbonate

Moles of sodium carbonate

  • 0.56(0.5)
  • 0.28mol

Molar mass

  • 2(23)+12+3(16)
  • 46+12+48
  • 106g/mol

Mass

  • 0.28(106)
  • 29.7g
8 0
2 years ago
What is meant by ion and salt
Neko [114]

<u>Answer:</u>

<u>Ion</u>

Ion is a charged particle.

A neutral atom contains equal number of positive protons and negative electrons

When an electron is lost or gained the atom becomes a charged particle which is called as an ION.

For example  

Na is an atom which contains 11 electrons and 11 protons(= to atomic number)

When Na loses an electron it will have 11 positive proton and 10 negative electron and Thus, Na will become Na^+, a charge particle which we call it as sodium ion.

Cl is an atom which contains 17 electrons and 17 protons(= to atomic number)

When Cl loses an electron it will have 17 positive proton and 18 negative electron and Thus, Cl will become Cl^-, a charge particle which we call it as chloride ion.

When an ion is positively charged it is called as a cation

When an ion is negatively charged it is called as an anion.

Salt is formed when an acid reacts with a base.

The cation of the base combines with the anion of the acid to form the salt.

$Acid+Base>Salt+water

HCl is acid and NaOH is a base forms salt NaCl and water.

Cl^- is an anion of the acid and Na^+ is the cation of the base combines to form NaCl salt .

H^+and OH^- combines to form H_2 O  

8 0
3 years ago
If 8.00 mol of NH3 reacted with 14.0 mol of O2, how many moles of H20 will be produced?
otez555 [7]

Answer:

 12 moles of water will be produced

Explanation:

Given data:

Number of moles of NH₃ = 8.00 mol

Number of moles of O₂ = 14.0 mol

Number of moles of H₂O produced = ?

Solution:

Chemical equation:

4NH₃ + 7O₂        →      4NO₂ +6H₂O

Now we will compare the moles of reactant with product.

              NH₃           :           H₂O

               4               :            6

               8               :          6/4×8 = 12

             O₂               :              H₂O

              7                 :               6

              14               :           6/7×14 = 12

 12 moles of water will be produced.

3 0
3 years ago
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