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8_murik_8 [283]
3 years ago
9

In this experiment, you will measure mass and volume of various sport balls, both regularly shaped ball and irregularly shaped.

What property of an object can you determine using mass and volume? In the space below, write a scientific question that you will answer by doing this experiment.
Chemistry
2 answers:
Marina86 [1]3 years ago
5 0
You can measure density. Question options: Are mass and volume related? How does a mass or volume change affect density?
kicyunya [14]3 years ago
4 0

Answer: Density can be measured using mass and volume.

Explanation:

Mass is defined as the actual matter which an object comprises.

Volume is defined as the amount of space occupied by the object measured in cubic units.

The relation between these two quantities defines a property which is known as density.

Density is the ratio of an object's mass to its volume. The S.I. unit for this property is kg/m^3. It can also be expressed in g/cm^3

Mathematically,

Density=\frac{Mass}{Volume}      ...(1)

Question related to this topic: A rock of mass 45 grams has a volume of 15cm^3. Determine the density of the given rock.

Answer: We are given

Mass of the rock = 45 g

Volume of the rock = 15cm^3

Putting values in equation 1, we get:

Density=\frac{45g}{15cm^3}=3g/cm^3

From the above example, we conclude that mass and volume are related to determine density of any object.

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Question 9 rank the effective nuclear charge z * experienced by a valence electron in each of these atoms:
AlexFokin [52]
To rank the effective nuclear charge Z* experienced by a valence electrons of a set of atoms that belong to a same period, you only need to apply the rule of trend: it increases as you move from left to right in the period.

So, lets do it for these atoms: P,  Al, Si, Cl

The belong to a same period and the order is Al, Si, P, Cl (just see a periodic table). So the rank is Al < Si < P < Cl

Now, lets do it for these atoms:, Be, Ne, O, C

They belong to the second period. The order is Be, C, O, Ne

So, the rank is Be < C < O < Ne.


7 0
3 years ago
Why do some chemical reactions occur?
zheka24 [161]

Answer:

Explanation:

Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules

7 0
4 years ago
Making jam and dry ice sublimating and becoming a gas are exapleanof what
Natali [406]

Answer:

Sublimation is a phase transition that occurs when a solid changes into a gas — or, as

Explanation:

3 0
3 years ago
Suppose a 250. mL flask is filled with 0.30 mol of N_2 and 0.70 mol of NO. The following reaction becomes possible:N_2(g) +O2 →
Inessa [10]

Answer:

0.4 M

Explanation:

Equilibrium occurs when the velocity of the formation of the products is equal to the velocity of the formation of the reactants. It can be described by the equilibrium constant, which is the multiplication of the concentration of the products elevated by their coefficients divided by the multiplication of the concentration of the reactants elevated by their coefficients. So, let's do an equilibrium chart for the reaction.

Because there's no O₂ in the beginning, the NO will decompose:

N₂(g) + O₂(g) ⇄ 2NO(g)

0.30 0 0.70 Initial

+x +x -2x Reacts (the stoichiometry is 1:1:2)

0.30+x x 0.70-2x Equilibrium

The equilibrium concentrations are the number of moles divided by the volume (0.250 L):

[N₂] = (0.30 + x)/0.250

[O₂] = x/0.25

[NO] = (0.70 - 2x)/0.250

K = [NO]²/([N₂]*[O₂])

K = \frac{(\frac{0.70 -2x}{0.250})^2 }{\frac{0.30+x}{0.250}*\frac{x}{0.250} }

7.70 = (0.70-2x)²/[(0.30+x)*x]

7.70 = (0.49 - 2.80x + 4x²)/(0.30x + x²)

4x² - 2.80x + 0.49 = 2.31x + 7.70x²

3.7x² + 5.11x - 0.49 = 0

Solving in a graphical calculator (or by Bhaskara's equation), x>0 and x<0.70

x = 0.09 mol

Thus,

[O₂] = 0.09/0.250 = 0.36 M ≅ 0.4 M

3 0
3 years ago
The total volume of a soda can is 415 mL. Of this 415 mL, there is 60.0 mL of headspace(empty space aka volume) for the CO2 gas
almond37 [142]

Answer:

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Explanation:

6 0
3 years ago
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