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Schach [20]
4 years ago
11

Why is it still a good idea to test more properties than might be necessary?

Chemistry
2 answers:
8_murik_8 [283]4 years ago
4 0
To get the average of your answer
AysviL [449]4 years ago
3 0
To get the average of your answer
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You are given three cubes, A, B, and C; one is magnesium, one is aluminum, and the third is silver. All three cubes have the sam
katovenus [111]

Answer:

The cube A is magnesium, the cube B is aluminum and the cube C is silver.

Explanation:

Density is defined by the expression d=\frac{m}{V} where m is the mass and V is the volume, therefore:

- Density of the cube A:

d_{A}=\frac{m_{A}}{V_{A}}

- Density of the cube B:

d_{B}=\frac{m_{B}}{V_{B}}

- Density of the cube C:

d_{C}=\frac{m_{C}}{V_{C}}

Solving for mass:

m_{A}=d_{A}*V_{A}

m_{B}=d_{B}*V_{B}

m_{C}=d_{C}*V_{C}

And all the three cubes have the same mass, so:

m_{A}=m_{B}=m_{C}

Therefore:

d_{A}*V_{A}=d_{B}*V_{B} (Eq.1)

d_{A}*V_{A}=d_{C}*V_{C} (Eq.2)

Solving for d_{1} in Eq.1:

d_{A}=d_{B}\frac{V_{B}}{V_{A}}

Replacing values for the volume:

d_{A}=d_{B}\frac{16.7mL}{25.9mL}

d_{A}=d_{B}*0.64

As we know the density of the aluminum is 2.7\frac{g}{cm^{3}}, so replacing this value for d_{B}:

d_{A}=2.7\frac{g}{mL}*0.64

d_{A}=1.728\frac{g}{mL}

that is the density of the magnesium.

Solving for d_{C} in Eq.2:

d_{C}=d_{A}\frac{V_{A}}{V_{C}}

d_{C}=d_{A}\frac{25.9mL}{4.29mL}

d_{C}=d_{A}*6.04

d_{C}=1.728\frac{g}{mL}*6.04

d_{C}=10.4\frac{g}{mL}

That is the density of the silver.

Therefore the cube A is magnesium, the cube B is aluminum and the cube C is silver.

8 0
4 years ago
How are magnetic objects able to be
Vadim26 [7]

Answer:

Explorations include static electricity, magnets, electromagnets and permanent magnets.  Examples of cause and effect relationships could include how the distance between objects affects strength of the force and how the orientation of magnets affects the direction of the magnetic force.

Explanation:

4 0
3 years ago
The decomposition of potassium chlorate into kcl & o2 is used as a source of oxygen in the laboratory. How many moles of pot
fredd [130]

Answer:

10moles of kcl

Explanation:

2 K C l O3 →  2 K C l  +  3 O 2

Notice that you have a  2 : 3  mole ratio between potassium chlorate and oxygen gas, which means that, regardless of how many moles of the former react, you'll always produce 2/3 times more moles of the latter.

15 mol of O2 * ((2mol of KCLO3)/(3mol of O2))= 15*2/3=10 Mol

5 0
4 years ago
What is a mixture called when it has its different components mixed evenly within the substance? Heterogeneous mixture Homogeneo
larisa86 [58]
It would be considered a Homogeneous Mixture. A mixture with two or more components mixed evenly is a Homogeneous mixture.

3 0
4 years ago
Read 2 more answers
What are the number of atoms in each Chemical Formula
podryga [215]
You can search that up online it’s not that hard but good luck !!
6 0
3 years ago
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