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andriy [413]
3 years ago
10

When heat, light, or sound is given off or absorbed, is it a chemical change, chemical property, physical change, or physical pr

operty?
Chemistry
1 answer:
Levart [38]3 years ago
6 0

Physical because it does not change the molecular composition.

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Please help with this question ;/
aev [14]
The link above is a hacker
8 0
3 years ago
Is sulfur a metal, nonmetal, metalloid, or noble gas?
Blababa [14]
Sulfer is a nonmetal
6 0
2 years ago
SE LES DARA EL NUMERO ATOMICO DEBERAN REALIZAR LA CONFIGURACION ELECTRONICA ESCRIBE SU NOMBRE SIMBOLO Y UBICACION EN LA TABLA PE
IrinaK [193]

Answer:

Zinc, Cerio, Talio, Cloro y Criptón.

Explicación:

El zinc es el elemento que tiene el número atómico 30 y su símbolo es Zn. Se encuentra en el grupo 2B de la tabla periódica. El cerio es el elemento que tiene el número atómico 58 y su símbolo es Ce. Se encuentra en el grupo de lantánidos de la tabla periódica. El talio es el elemento que tiene el número atómico 81 y su símbolo es Tl. Se encuentra en el tercer grupo de la tabla periódica. El cloro es el elemento que tiene el número atómico 17 y su símbolo es Cl. Se encuentra en el séptimo grupo de la tabla periódica. El criptón es el elemento que tiene el número atómico 36 y su símbolo es Kr. Se encuentra en el grupo de gases nobles, es decir, en la tabla periódica del octavo grupo.

4 0
3 years ago
The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____.
Flura [38]
Here are the answers that would best complete the given statement above. The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the SOLUTE and the nitrogen is the SOLVENT. In a given mixture, the reagent having the highest percentage of amount is always the solvent and the one or ones having the lower percentages are the solutes. Hope this answer helps.
6 0
3 years ago
Which is the coal with the highest energy available per unit to burn: lignite, subbituminous, bituminous, or anthracite?
olya-2409 [2.1K]

Answer:

Anthracite

Explanation:

Anthracite produce highest amount of energy than other. It contain 86-97 percent carbon. Bituminous coal contain 45-86 percent carbon.

Subbituminous cola have 35-45 percent carbon while lignite contain 25-35 percent carbon.

Coal is source of many organic materials. It is fossil fuel and form after long period decay of plants. It is formed when trees are buried under earth

about 500 million years ago. The chemical and bacterial reactions take place and plant wood converted into the peat.

Than because of high temperature and pressure inside the earth peat is converted into the coal.

Through other processes it is than used to make the fuels such as coke. coal tar and coal gas.

Coal tar is the source of many organic compounds which are separated through fractional distillation.

About 80% of coal in Pakistan is used to bake the bricks and also used in lime kilns and for domestic purpose.

6 0
3 years ago
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