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Jobisdone [24]
3 years ago
8

Identify the substance given to the technician.

Chemistry
1 answer:
katrin [286]3 years ago
5 0
The substance would be sodium nitrate, to figure this out all you need to do is read each sentence carefully and see if whatever the lab technician notices happening to the substance does it match with any of the substances listed in the table, if it does not match, any one description we can eliminate that compound as a choice. Carry this method of elimination basically until you come to the last sentence. Since the substance melts at temperature above the melting point, it can't be potassium chromate as it would change state at a temperature of 974 degrees Celsius, not high of temperature for the change, as the oven is at 450 degrees Celsius only.
You might be interested in
In a DNA molecule, if 38% of the molecular bases are C (cytosine), what percent of the bases are T (thymine)?
andreyandreev [35.5K]

Answer:

thymine is 19%

Explanation:

Acc to Chargaff's rule, amount of Adenine= amount of Thymine as well as amount of Guanine= amount of Cytosine. Amount left for Thymine and Adenine is 38% now. Since both Adenine and Thymine are, again in equal quantities, so therefore percentage of thymine is 19%.

8 0
3 years ago
Write a balanced chemical equation, including physical state symbols, for the decomposition of liquid nitroglycerin () into gase
Marat540 [252]

Answer:

4C3H5N3O9 (l)  ---------> 12CO2 (g)  +  H20 (g)  + 6N2 (g) + 6O2 (g)

Explanation:

Nitroglcerin is a drug basically used to treat chest pain. It is a dense, colourless and explo9sive liquid. Its molecular formula is C3H5N3O9.

It decomposes to gaseous dinitrogen, gaseous dioxygen, gaseous water and gaseous carbon di oxide

The equation for its decomposition is shown below;

4C3H5N3O9 (l)  ---------> 12CO2 (g)  +  H20 (g)  + 6N2 (g) + 6O2 (g)

3 0
4 years ago
You are running late to school and need to go 1,500 m in 10 minutes. What speed will you travel?
hodyreva [135]

Answer:

15 m/min

Explanation:

You take the 1500 divide by 10 and your answer is 15

5 0
3 years ago
What happens if you apply pressure on the oobleck?
nignag [31]

What happens if you apply pressure on the oobleck?

the surfice gets hard and nothing can pass through it, you can punch it and it will hurt

What happens if you try rolling the oobleck into a ball?

you cant i will go back to being a liquid and fall through your fingers

What happens when you let it run through your fingers?

its just like a liquid

only if you add presure will it turn hard

8 0
3 years ago
What is the value for ΔS°reaction for the following reaction, given the standard entropy values
QveST [7]
Standard entropy of the compounds of interest are as follows, 
S^{0} (C6H12O6) = 212.1 J/K.mol
S^{0} (O2) = 205.0 J/K.mol
S^{0} (CO2) = 213.6 J/K.mol
S^{0} (H2O) = 69.9 J/K.mol

Now for the reaction: 
C6H12O6(s) + 6O2(g) —->6CO2(g) + 6H2O(l)

ΔS°reaction = ∑S^{0} products - ∑S^{0} reactants
∴ ΔS°reaction =( 6 S^{0} (CO2) + 6 S^{0} (H2O) ) - (S^{0} (C6H12O6) + 6 S^{0} (O2) = 205.0 J/K.mol)
∴ ΔS°reaction = [6 (213.6) + 6 (69.9 )] - [(212.1) + 6(205.0)]
∴ ΔS°reaction = 258.9
5 0
3 years ago
Read 2 more answers
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