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diamong [38]
3 years ago
7

How many objects in the solar system have been confirmed to currently support life?

Chemistry
2 answers:
yulyashka [42]3 years ago
6 0
B. One
I believe that earth is the only planet that has life that we know of on it.
dmitriy555 [2]3 years ago
5 0

Answer:

b

Explanation:

Because mars does not count becuase it NOT CONFIRMED so only earth

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Carbon (C): 1s(H)2s(I)2p(J)<br> What is H, I, and J equal?
Artemon [7]

Answer:

H =2; I = 2; J = 2  

Explanation:

Carbon is element 6 in the Periodic Table.  

Start at element 1 (H) and count from left to right until you reach element 6 (C).

You get the electron configuration

C: 1s² 2s²2p².

Thus,

H =2; I = 2; J = 2

3 0
3 years ago
What are some examples of properties scientists use to describe matter?
AveGali [126]

Answer:

Physical properties are used to observe and describe matter. Physical properties can be observed or measured without changing the composition of matter. These are properties such as mass, weight, volume, and density.

4 0
2 years ago
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What unit would you use to describe the width of a street
vekshin1
I'm pretty sure it's yards
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3 years ago
The atomic number of aluminum is 13. What is the correct designation of the electron configuration of aluminum?.
Svetlanka [38]

Answer:

Its 1s22s22p63s23p1 ik it looks a lil goofy but i think its right

Explanation:

3 0
1 year ago
Help! What did I do wrong??
iogann1982 [59]

The molecules  of hydrogen gas that are  formed is  when 48.7 g  of sodium are added to water  is  6.375  x 10²³  molecules


  <u><em>calculation</em></u>

2 Na +2H₂O →  2 NaOH  +H₂

Step 1: find the moles  of sodium (Na)

moles =mass÷   molar mass

from periodic table the molar mass of Na = 23 g/mol

moles= 48.7 g÷ 23 g/mol =2.117 moles

Step 2:use the mole ratio to determine  the  moles of H₂

  from  given equation  Na:H₂ is 2:1

therefore the moles  of H₂ = 2.117 moles x 1/2=1.059 moles

Step 3: find the molecules of H₂ using the Avogadro's law

According  to  Avogadro's  law  1 mole = 6.02 x 10²³ molecules

                                                      1.059 moles = ?  molecules

by cross multiplication

= [(1.059 moles x 6.02 x10²³  molecules) /  1 mole] =6.375  x 10²³  molecules

4 0
3 years ago
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