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zhenek [66]
3 years ago
13

The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?

Chemistry
1 answer:
stepladder [879]3 years ago
7 0

Answer:

Chemical

Explanation:

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Convert 2.55 moles of water to grams.
Vlada [557]

Explanation:

No of mass = no of moles × molar mass

=2.55 × 18 g

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6 0
3 years ago
For many purposes we can treat ammonia (NH) as an ideal gas at temperatures above its boiling point of -33.C. Suppose the temper
levacccp [35]

Answer:

In homeothermic (“warm-blooded”) animals, body temperature is carefully  

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Explanation: Basic chemical understanding as revealed upwards  

6 0
3 years ago
Propose a method for determining the specific heat for a metal like sodium which reacts violently with water.
nalin [4]
You can put a known amount sodium into some sort of time release mechanism such as a pill made from soluble material.  Then you can place the sodium into a calorimeter with a known mass of water and record the temperature change the water undergoes during the reaction.  Then you can use the equation q(water)=m(water)c(water)ΔT to find the amount of heat absorbed by the water.  since the amount of heat absorbed by the water is the amount of heat released from the sodium, q(sodium)=-q(water).  Than you can use the equation q(sodium)=m(sodium)c(sodium)ΔT and solve for c(sodium)

I hope this helps and feel free to ask about anything that was unclear in the comments.
4 0
3 years ago
Someone help me with chemistry on my account/page please :))
Gemiola [76]

Answer:

ok

Explanation:

5 0
2 years ago
We can know what elements make up a star by studying the star's position in the
Amanda [17]
The answer is "night sky"
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