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My name is Ann [436]
3 years ago
8

Question 1 (4 points)

Chemistry
1 answer:
oee [108]3 years ago
4 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Blank # 1 - keep safe distance from the burner

Blank # 2 - Place the equipments on the right place after use

Blank # 3 - perform experiments with proper lab equipment and safety tools

Blank # 4 - Don't break any test tube or lab equipment

(maybe it can be hazardous)

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Answer:

  1. True
  2. False
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Explanation:

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Radar detectors use radio waves to measure the speed of moving
bagirrra123 [75]

Answer:

1.7x10^8 Hz

Explanation:

Frequency could be explained as the number of occurrences of a repeating event at a time

Given:

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The frequency f of the waves can be calculated using f = c / λ

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6 0
3 years ago
What is scientific law how does a hypothesis become a law
malfutka [58]

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A compound was found to be soluble in water. It was also found that addition of acid to an aqueous solution of this compound res
gogolik [260]

Answer:

c. Cr

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The compound is containing CO_3^2- ion.

If acid reacts with it, CO_2 evolves.

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therefore,  Cr would form a precipitate when added to an aqueous solution of this compound. Cr2CO3 is the precipitate.

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