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4 years ago

Juan made the following bar graph shown to represent the relative distances of four different astronomical bodies from Earth.

2 answers:

6 0

The answer is: <span>B could be the sun, and C could be the moon.
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Logically, you can solve for this by considering first the astronomical bodies mentioned .We have the sun, Uranus, Mars, and the moon.

Next is we consider the sizes of the bar graphs. It states there that BAR C is the shortest. So automatically, we can say that BAR C is the moon, because among all the astronomical bodies mentioned in the choices, the moon is the closest body to the Earth.

With that alone, we can say that the 2nd statement would be the only one correct.

True [87]4 years ago

6 0

Answer:Its B

Explanation:

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On the first day of your new job as a chemist, you are given a bottle of magnesium sulfate and asked to make 30 mL of 0.3 M MgSO

Lady bird [3.3K]

Answer:

The answer to your question is 15500 mg of MgSO₄ 7H₂O

Explanation:

Data

Volume = 30 ml

Concentration = 0.3 M

Formula MgSO4∗7H2O

Process

1.- Calculate the number of moles needed

Molarity = moles / volume

Solve for moles

moles = Molarity x volume

Substitution

moles = 0.3 x 0.03 l

moles = 0.009 moles of MgSO₄

2.- Calculate the molecular mass of MgSO4∗7H2O

molecular mass = 24 + 32 + 64 + 14 + 112

= 246 g

3.- Get the proportion MgSO4 :7H2O, this proportion is 1 : 7

4.- Calculate the amount of MgSO4∗7H2O

$0.009 mol of MgSO4 \frac{7 MgSO4 7H2O}{1 mol MgSO4} \frac{246 g MgSO4 7H2O}{1 mol MgSO4 7H2O}$

Simplification

15.5 g = 15500 mg

5 0

4 years ago

Sulfuric acid dissolves and completely dissociates in water and a solvation sphere of water molecules forms around the ions. Thi

gizmo_the_mogwai [7]

The answer is D

Hope this help;)

3 0

4 years ago

Read 2 more answers

Which of these bonds should be classified as ionic?

jolli1 [7]

Answer:

Na-O

Be-S

Explanation:

ionic bonds= metal and non metal

7 0

3 years ago

Read 2 more answers

What is the average binding energy per nucleon for a U-238 nucleus with a mass defect of 0.184 amu? (1 amu= 1.66 x 10-27 kg; 1 J

Bond [772]

add all the number and find the average then subtract the mass defect and then you will get your answer

3 0

3 years ago

Which of the following is not an example of potential energy? Group of answer choices electrical energy, chemical energy, gravit

Sholpan [36]

Answer: The one listed below that's NOT an example of potential energy is mechanical energy. Mechanical energy is categorized as a kinetic energy with light, sound, and thermal/heat energy.

HOPE THIS HELPS

6 0

3 years ago