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ololo11 [35]
4 years ago
15

Qualitatively estimate the relative melting points for each of the solids, and rank them in decreasing order. Rank from highest

to lowest melting point.
A. ammonia
B. calcium
C. chloride
D. quartz
Chemistry
1 answer:
baherus [9]4 years ago
3 0

Answer:

The order is

Quartz > Calcium > Ammonia > Chlorine

Explanation:

Among given compounds

Quartz is a covalent compound with extensive bondings and thus it will have highest melting point

Calcium is a metal so it will have strong metallic bonds thus will have high melting point, however less than quartz.

ammonia is a polar molecule with weak hydrogen bond as intermolecular interactions thus will have higher melting point than chlorine

chlorine is a non polar molecule with weak intermolecular london dispersion forces.

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Akosua has observed that anytime she drinks sobolo, her stool appears dark green. On one occasion
Anna007 [38]

Answer:

i. Sobolo is a Ghanian drink that is produced from red hibiscus flower that has an average pH of 6.7

It contains cyanidin and anthocyanins, which is a red pigment that is red in an acidic medium and changes green when introduced in a basic medium that has a high pH

The pH at the rectum of the digestive system = 5 to 8 (Slightly basic)

Therefore, what made the stool of Akosua green is that the sobolo drink changes to green in basic solution

ii. The stool which appeared green because she took sobolo turn into bright red upon mixing with the acidic WC water because of the presence of anthocyanins in sobolo, it turns red in an acidic medium

iii. Sobolo which turns green, or blue in a basic medium and red in an acidic medium can be used as a litmus solution to test the pH of a given substance

Explanation:

Sobolo or soobolo in Ghana is a name for the Hibiscus tea or tisane, which is made from calyces of the hibiscus plant, and has a sour (tangy) taste and appears bright red in color

8 0
3 years ago
What type of chemical reaction occurs when more energy Is released during the chemical reaction than is needed to start the chem
Ksju [112]

Answer:

Explanation:

Exothermic Reactions

Exothermic Reactions

This means that the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products. Excess energy from the reaction is released as heat and light. Figure: Chemical reaction: A Hermite reaction, which produces molten iron.

3 0
3 years ago
How write 5601 in scientific notation
podryga [215]
5.601x10^3
The decimal has to be in front of the first number
4 0
3 years ago
Ecosystems do not have similar climates and every plant is different True or false
Soloha48 [4]
This is false. Some plants are the same or at least very similar
4 0
2 years ago
Is the following reaction spontaneous at 298 K? (Answer by calculating delta G)
patriot [66]

Answer:

The reaction H2O(g)+C(s) -> CO(g)+ H2(g) is NOT spontaneous because its ΔG =  91 kJ/moles

Explanation:

ΔG is calculated by ΔH - TΔS

ΔG = ΔH - TΔS

ΔG = 131.3 kJ/mole - 298K . 0,134kJ/mole K

ΔG = 91.068 kJ/moles

Be careful with the ΔS, because you have J, and in ΔH, you have kJ

6 0
3 years ago
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