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max2010maxim [7]
4 years ago
8

Help ASAP!

Chemistry
1 answer:
ipn [44]4 years ago
5 0

I believe the answer is D

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Hi, I'm lost on which ones to choose on this CHEM Problem.
DaniilM [7]

Answer:

✓no change in the composition of the platinum could be detected

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3 years ago
Describe how a constant volume calorimeter can be used to measure the heat transferred from a burning piece of coal to cool wate
Vlad1618 [11]

Answer:

A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.

Explanation:

Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.

   - When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.

A burning piece of coal which is releasing heat due to its combustion and is transferred to water.

Mark as Brainliest ;)

7 0
3 years ago
How many moles of C2H2 are needed to react completely with 84.0 mol O2?
Airida [17]
33.6 moles are needed to completely react with 84.0 moles of O2
3 0
3 years ago
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Why objects float in outer space?
viktelen [127]
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7 0
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2.2.<br> Name the two stages of photosynthesis
andre [41]

Answer:

1. Light-dependent stage

2. Light-independent stage or Calvin cycle

Explanation:

Photosynthesis is the process by which plants and other autotrophic organisms synthesize their food (glucose) in the presence of sunlight as energy source. However, this photosynthetic process, which is a metabolic reaction occurs in two stages namely; Light-dependent stage and Light-independent stage.

- The light dependent stage occurs in the thylakoid membrane of the chloroplast. It involves the synthesis of NADPH and ATP needed for the light independent stage of photosynthesis.

- The light independent stage also known as Calvin cycle occurs in the stroma of the chloroplast. This is the stage where glucose is synthesized using inorganic source of carbon (CO2).

6 0
4 years ago
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