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34kurt
4 years ago
9

Your laboratory instructor has given you two shiny, light-gray metal cylinders. your assignment is to determine which one is mad

e of aluminum (d = 2.699 g/ml) and which one is made of titanium (d = 4.54 g/ml).
Chemistry
1 answer:
Leviafan [203]4 years ago
8 0
One of the ways that we will be able to distinguish between the metals given that they have the same characteristic of being shiny and light-gray, is to density difference. 

It is known that a substance whose density is larger than the density of the liquid to which it is submerged, will sink in the fluid. Also, the solid whose density is smaller compared to that of the fluid will float. 

In most ideal case, we may opt to prepare a solution with density of 3 g/ml. Since aluminum has density lower than 3, it will float in the fluid. The titanium will sink on it because of a density higher than or greater than 3. 

It is to be noted that pure water cannot be used because its density is 1 g/ml and both metals will sink in it. 
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What did earth look like before life began
melisa1 [442]

Answer:

Like a jungle with trees everywhere

Hope This Helps!   Have A Nice Day!!

5 0
4 years ago
Read 2 more answers
The following are electronegativity. What value should be where the M is?0.981.57M2.553.043.443.98No data
ipn [44]

Answer 2.04

Explanation

Electronegativity decreases down the group and increases across the period in the periodic table.

In the period two of the periodic table,we have the following values for electronegativities with respect to its elements.

Li...........0.98

Be.........1.57

B..........2.04

C.........2.55

N..........3.04

O...........3.44

F...........3.98

Ne........n.a

The value that should be where M is is 2.04

6 0
1 year ago
Phosphagens are a group of molecules that includes creatine phosphate (in vertebrates), and arginine phosphate, lombricine, and
BARSIC [14]

Answer:

Phosphagen provides the needed energy for the muscle tissues which can not be immediately supplied by glycolysis or oxidative phosphorylation. They supply immediate but limited energy as sudden demands for lots of energy by the muscle tissues arise.

Explanation:

Phosphagens are high energy storage compounds majorly found in muscular tissue of animals.

They allow maintenance of the high energy phosphate stores in its normal concentration ranges which discard the problems associated with ATP-consuming reactions in these tissues as against the presence of adenosine triphosphate.

The muscle tissues are actively working and need constant supply of energy and the energy produced by glycolysis and oxidative phosphorylation might not sum up to the needs of the tissues. So therefore, phosphagens serve as a stand by mechanism for energy production for the tissues mostly during sustained muscle activity.

The man, the muscle cells' phosphocreatinine concentration is more than three times the concentration of ATP and represent a ready reserve of high energy phosphate that can be donated directly to Adenosine diphosohate to release energy.

Different organisms use different biomolecule as a phosphagen. Majority of animals use arginine as their phosphagen, chordates use creatinine, annelids use lombricine.

They all perform these similar functions described above.

5 0
3 years ago
What carries information to the brain?
Vika [28.1K]
I believe the medulla is the answer.
3 0
3 years ago
Read 2 more answers
A 17.6-g sample of ammonium carbonate contains ________ mol of ammonium ions.
postnew [5]
These problems are a bit interesting. :)

First let's write the molecular formula for ammonium carbonate. 

NH4CO3 (Note! The 4 and 3 are subscripts, and not coefficients)

17.6 gNH4CO3

Now to convert to mol of one of our substances we take the percent composition of that particular part of the molecule and multiply it by our starting mass. This is what it looks like using dimensional analyse. 

17.6 gNH4CO3 * (Molar Mass of NH4 / Molar Mass of NH4CO3)

Grab a periodic table (or look one up) and find the molar masses for these molecules! Well. In this case I'll do it for you. (Note: I round the molar masses off to two decimal places)

NH4 = 14.01 + 4*1.01 = 18.05 g/mol
NH4CO3 = 14.01 + 4*1.01 + 12.01 + 3*16.00 = 78.06 g/mol


17.6 gNH4CO3 * (18.05 molNH4 / 78.06 molNH4CO3)
= 4.07 gNH4

Now just take the molar mass we found to convert that amount into moles!

4.07 gNH4 * (1 molNH4 / 18.05 gNH4) = 0.225 molNH4

4 0
3 years ago
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