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Montano1993 [528]
2 years ago
12

Which inner planet has 2 moons? Question 2 options: Mercury Venus Earth Mars

Chemistry
1 answer:
MaRussiya [10]2 years ago
5 0

Answer:

Mars

Explanation:

neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons

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How many sig figs are in 0.00205kg
fiasKO [112]
It’s 20500000, here are some extras if u need

4 0
3 years ago
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What is indicated by 'A' in the figure below? A. -VE B. +Ea C. -Ea D. +VE
makkiz [27]

Answer:

+VE

Explanation:

If we look at the reaction profile pictured in the question, we can easily identify A as the enthalpy of the reaction. The enthalpy of reaction (ΔHrxn) is usually defined as the difference between the total enthalpy (heat content) of the products of a reaction and the total enthalpy (heat content) of the reactants in that reaction.

Looking at the figure, we can see that the enthalpy of products is greater than the enthalpy of reactants, hence ∆Hrxn is positive as stated in the answer above.

6 0
3 years ago
How many atoms are in 578g Na
borishaifa [10]

1.51 x 10²⁵atoms

Explanation:

Given parameters:

Mass of Na = 578g

Unknown:

Number of atoms = ?

Solution:

 To find the number of atoms, we must first find the number of moles the given mass contains.

  Number of moles  = \frac{mass}{molar mass}

   molar mass of Na = 23g

 Number of moles =  \frac{578}{23} =  25.13moles

   1 mole of a substance = 6.02 x 10²³atoms

    25.13 mole of Na = 25.13 x  6.02 x 10²³atoms

 This gives  1.51 x 10²⁵atoms of Na

Learn more:

Avogadro's constant brainly.com/question/2746374

#learnwithBrainly

5 0
3 years ago
Q3 You measure about 100 quarters...
tresset_1 [31]
The answer is four hundred
7 0
2 years ago
A solution has a pH of 12. Is it considered an
Mila [183]

Answer:

Base

Explanation:

5 0
2 years ago
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