3 years ago

Which questions would be most useful in a

Chemistry

1 answer:

____ [38]3 years ago

3 0

Answer:

C.) does the butterfly have spots

E.) does the butterfly have ruffled wing edges?

Explanation: It was correct for me

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Which element would make a poor, brittle conductor? use the periodic table for help. a. sulfur b. boron c. cobalt d. calcium?

Greeley [361]

I think the answer is C or B

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3 years ago

All of the following require breaking and forming chemical bonds except

skad [1K]

As far as I know, the answer is B (breaking a rock)

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3 years ago

Two Balloons one filled with hydrogen gas and second filled with neon gas. what gas should be used in an experiement to identify

dalvyx [7]

Answer:

Oxygen

Explanation:

If two balloons are filled with hydrogen gas and helium gas respectively, then we want to identify what gas is in each balloon, we have to do so by exposing the both balloons to flame in an oxygen atmosphere.

Hydrogen combines with oxygen in the presence of a flame with quite a loud sound and the flame is sustained but when a flame is brought near helium gas in a balloon, the gas will only make a little sound when exposed to the flame and extinguish the flame.

The reason for the explosion of the gas in the hydrogen balloon is that combustion of hydrogen gas is exothermic. The heating up of surrounding air molecules leads to a sudden explosion.

However, the helium balloon makes a little sound when the balloon is ruptured releasing helium gas which extinguishes the flame.

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3 years ago

3.1

stich3 [128]

Answer:

C3H8 +5O2 arrow 3CO2 +4H2O

4 0

3 years ago

Which option is an example of a physical property?

4vir4ik [10]

Physical property is C.Density