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3 years ago

_____ net forces cause objects to change their motion. A. Zero B. Applied C. Balanced D. Unbalanced

Chemistry

2 answers:

castortr0y [4]3 years ago

6 0

Should be applied so B

gavmur [86]3 years ago

3 0

Applied is the correct answer

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Explain why gas such as oxygen is compressed in tanks.

Nat2105 [25]

It is compressed so that the volume is reduced making it easier to transport via gas tanks. However, it must not be exposed to high temperature because the pressure inside the tank will increase more than the tank can hold resulting to explosions. The gas has to be decompressed to atmospheric before it can be inhaled.

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2 years ago

Can someone please explain how to do number 11?

BaLLatris [955]

Answer:

HBr + Mg(OH)2 —> MgBr2 + H2O.

To balance the above, we must do a head count of the individual atoms present to ensure they balance on both sides of the equation. To get the balance equation, add 2 in front of HBr and 2 in front of H2O as shown below:

2HBr + Mg(OH)2 —> MgBr2 + 2H2O

We can see clearly that the numbers of the individual atoms on the left side is the same on the right side

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4 years ago

When an object's speed and direction are known, so is its _____. A. mass B. velocity C. momentum D. acceleration

dexar [7]

D. acceleration

Explanation:

When an object's speed and direction are known, its acceleration can also be determined.

Acceleration is defined as the change in velocity of a body in motion with time.

Most times, velocity and speed can be changed if the direction a body is traveling is known.

Acceleration = $\frac{Change in velocity }{time}$

The S.I unit of acceleration is always expressed as m/s²

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Acceleration brainly.com/question/3820012

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3 0

3 years ago

Read 2 more answers

If 43.7 g of iron is completely used to produce 62.5 g of iron (III) oxide, how many grams of oxygen are involved in the reactio

Kobotan [32]

Mass of Oxygen : 18.8 g

<h3>Further explanation</h3>

Reaction(balanced) :

4Fe + 3O₂ → 2Fe₂O₃

mass Fe = 43.7 g

mol Fe(MW= 55,845 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{43.7}{55.845}\\\\mol=0.783$

mol O₂ : mol Fe = 3 : 4, so mol O₂ :

$\tt \dfrac{3}{4}\times 0.783=0.5873$

Mass O₂(MW=32 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.5873\times 32\\\\mass=18.7936~g\approx 18.8$

Or simply you can Conservation of mass, where the masses before and after the reaction are the same

<em>mass reactants=mass products</em>

mass iron+mass oxygen=mass iron (III) oxide

43.7 g + mass oxygen=62.5 g

mass oxygen = 62.5 - 43.7 = 18.8 g

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3 years ago

Difference between chemical properties of metals and non metals.

Vilka [71]

Answer:Chemical Properties: Non-metals generally have somewhere around 4 to 8 electrons in the outer shell. Non-metals tend to gain or accept valence electrons. When they are exposed to oxygen, non-metals react with oxygen to form acidic oxides.

Explanation:

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3 0

4 years ago

Read 2 more answers