How many atoms are in a grain of sand??

2 answers:

8 0

Avogadro tells us that we have 6.023 x 10^23 SiO2 units per gram, so there would be 6.023 x 10^23 / 60 ≈ 1 x 10^22 SiO2 units in a gram of pure SiO2, and with SiO2 composed of 3 atoms, that puts us at 3 x 10^22 atoms per gram of SiO2. Now, a grain of sand does not weigh 1 gram. It weighs less

34kurt3 years ago

5 0

5 x 10^19 atoms in standard expression. hope this helps

You might be interested in

Look at the following sequence: THE FAT CAT ATE THE RAT. Delete the first H, and regroup the letters in groups of three, then wr

PIT_PIT [208]

A balloon and air blow a cat away

7 0

3 years ago

Rosa drew a flow chart of the carbon cycle. Flow chart of the carbon cycle with 4 boxes connected by arrows. Box 1: carbon dioxi

leonid [27]

Answer:

(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.

Explanation:

(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.

(b) X: Decomposers return carbon to the soil and release waste. Y: Producers undergo photosynthesis.

(c) X: Decomposers take in carbon dioxide. Y: Producers absorb carbon through their roots.

(d)X: Producers absorb carbon through their roots. Y: Decomposers take in carbon dioxide.

Box 2 (X) would be the process through which producers fix carbon dioxide to produce their own food, the carbohydrate. The process is otherwise known as photosynthesis and can be represented by the following equation:

$6CO_2 + 6H_20 --> C_6H_1_2O_6 + 6O_2$

Box 4 (Y) would be the process of decomposition. Both producers and consumers eventually die and decompose in the soil. During this process, some of the carbon returns to the soil as organic matters while the process of microbial decomposition releases carbon dioxide into the atmosphere.

The correct option would be (a).

3 0

3 years ago

Cells use vesicles to transport substances with?

Nuetrik [128]

Vesicles are used to transport items in many different circumstances, so I'm not quite sure how to answer your question. Vesicles are used when transporting to and from the golgi apparatus, also when transporting molecules to lysosomes. They are even used when undergoing exocytosis. Basically, they are used to carry items/molecules/wastes around within cells

8 0

3 years ago

Describe the functional unit of the nervous system

emmasim [6.3K]

"Neurons" are the functional unit of the nervous system; it is the specialized cells transmitting nerve impulses

Hope this helps!

4 0

3 years ago

Would the deer on the island be better off with or without the wolves

goblinko [34]

Without wolves of course, because wolves eat deer :D

8 0

3 years ago