when a substance goes through a chemical change, it forms a new substance that has different physical and chemical properties

1 answer:

5 0

True. The thing about chemical changes is that it is not easily reversible and new substances having different chemical properties are formed. For example; burning of wood to ashes.

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What is correct name of the compound whose formula is bf3?

ololo11 [35]

Boron trifluoride is the correct name for compound BF3

8 0

3 years ago

When compounds are formed, will its heat give off?

mariarad [96]

Answer: It depends on the type of chemical reaction that formed the compound.

Explanation:

Exothermic reactions give off the heat to the reaction environment, so the compound feels hotter.

Endothermic reactions absorb the heat from the reaction environment and the compound feels cooler.

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3 years ago

Using two different instruments I measured the length of my foot to be 27 centimeters and 27.00 centimeters. Explain the differe

Sophie [7]

Answer:

As you used two diferent instruments, one is more sensitive than the other.

Explanation:

The sensitivity of an instrument is the minimum amount of magnitude that can be differentiate a measurement system.

In method A, you got 27 cm, so if in method B, you got 27.00, method B is more sensitive. It's like saying that one system measures more than the other

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3 years ago

Match the following descriptions with the correct polysaccharide, note if you answer any part of this question incorrectly a sig

Ad libitum [116K]

Answer:

Glycogen. Cellulose. Amylose. Cellulose. Amylopetin and Glycogen. Amylopetin and Cellulose.

Explanation:

Glycogen is the form that glucose is stored in human body.

Cellulose is the structural part of plant cell walls and human cannot digest it.

Amylose is the polysaccharide linked mainly by the the bonds of $\alpha$ 1,4 glycosidic.

Cellulose is an unbranched polysaccharide linked mainly by the bonds of $\beta$ 1,4 glycosidic.

Amylopetin and Glycogen are branched polysaccharides linked by the bonds of $\alpha$ 1,4 glycosidic and $\alpha$ 1,6 glycosidic.

Amylopetin and Cellulose are mainly stored in plants.

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3 years ago

A substance is highly malleable and has a shiny luster. Which of the following best explains the probable position of the substa

Aleks04 [339]

The answer is D only metals are shiny and highly malleable

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3 years ago

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