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Alchen [17]
3 years ago
10

Which phrases accurately describe this rock? Check all that apply.

Chemistry
1 answer:
Ksenya-84 [330]3 years ago
8 0

Answer:

This rock, is specifically a rock, a hard rock, a tough rock, a rough rock, a rock that is underground, a rock that is above ground, my rock.

Explanation:

This rock, is specifically a rock, a hard rock, a tough rock, a rough rock, a rock that is underground, a rock that is above ground, my rock.

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Which of these is not a biomass source?
liberstina [14]
A biomass source is an natural material.

The sun is natural.

Manure is natural.

Wood Chips are natural.

Paper is natural and treated with unnatural substances.
7 0
3 years ago
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If 8.500 g CH is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final
mojhsa [17]

The final temperature = 36 °C

<h3>Further explanation</h3>

The balanced combustion reaction for C₆H₆

2C₆H₆(l)+15O₂(g)⇒ 12CO₂(g)+6H₂O(l)  +6542 kJ

MW C₆H₆ : 78.11 g/mol

mol C₆H₆ :

\tt \dfrac{8.5}{78.11}=0.109

Heat released for 2 mol C₆H₆ =6542 kJ, so for 1 mol

\tt \dfrac{0.109}{2}\times 6542=356.539~kJ/mol

Heat transferred to water :

Q=m.c.ΔT

\tt 356.539=5.691~kg\times 4.18~kj/kg^oC\times (t_2-21)\\\\t_2-21=15\rightarrow t_2=36^oC

3 0
2 years ago
What are twin primes between 1 to 100<br>​
Furkat [3]
The twin primes between 1 and 100 are; (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73). Hope this helped<3
6 0
2 years ago
Which two types of consumers are known as “nature’s clean-up crew”? Why are they important?
NeTakaya

Fungus: Important because it breaks up several dead leaves, particles, etc, and puts nutrients back in the ground.

Carnivores: eat dead animals, no stinky rotten meat around.

3 0
3 years ago
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Of the elements: b, c, f, li, and na. the element with the smallest ionization energy is
love history [14]
B-  8.2980
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Na- 5.1391

I would say your answer is Na.
8 0
3 years ago
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