Help please?!?!??!?!?!?

If a solid contain some particles that amount and 50°C and other particles amount mount at 110°C what must be true about the sol

mina [271]

Answer: The solid is a mixture

Explanation:

Here's the complete question:

If a solid contains some particles that melt at 50°C and other particles that melt at 110°C, what must be true about the solid?

A. The solid is an element.

B. The solid is a mixture.

C. The solid is a pure substance.

D. The solid has three boiling points.

It should be noted that an element consist of an atom but in this scenario, there are different particles that also have different melting points. Therefore, it's not an element, but rather a mixture.

Also, the solid in this case is not a pure substance and doesn't have three boiling points.

Therefore, the correct option is B.

4 0

3 years ago

What do bears depend on for nutrition.

DIA [1.3K]

Answer:

Fish and meat are important sources of protein and fat, though most non-coastal bears rely on carrion (including winter-killed animals)

Explanation:

Some bears, become very effective predators on newborn elk, moose, deer or caribou. Others live in areas where salmon, su.ckers or other fish spawn for part of each year.

When bears emerge from their dens in the spring, food is in short supply. Although bears are hungry, most trees and shrubs won’t leaf for another month and only the grass at lower elevations has begun to green up.

Hope I helped, if so may I get brainliest??

Thank you, have a good day! =)

6 0

3 years ago

Explain why natural selection is an advantage to organisms.

yan [13]

Answer:

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. ... Individuals with adaptive traits—traits that give them some advantage—are more likely to survive and reproduce.

Explanation:

8 0

3 years ago

-)

Verdich [7]

Answer:

B) The mass of the reactants equals the mass of the products,

Explanation:

Given that the reaction is balanced, the mass of the reactants must equal to the mass of the products.

We know this by virtue of the law of conservation of mass.

The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed but atoms are rearranged".

Therefore, if the reaction is chemically balanced, the mass of reactants must be the same as the mass of the products in the reaction.

The second choice is the right one.

8 0

3 years ago

Compare and contrast photosynthesis and cellular respiration (include the balanced chemical reactions). Include two similarities

muminat

Answer:

Photosynthesis and cellular respiration both are a part of carbon cycle.

Explanation:

<u>Photosynthesis & cellular respiration differences:</u>

(1) Photosynthesis is an anabolic process whereas cellular respiration is a catabolic process.

(2) Photosynthesis uses carbon dioxide and water as substrates to produce glucose as product and oxygen as byproduct.

The balanced chemical reaction for photosynthesis is mentioned as under:

Sunlight

6CO₂ + 6H₂O ---------------------> C₆H₁₂O₆ + 6O₂

(Carbon dioxide) (Water) (Glucose) (Oxygen)

In contrast to photosynthesis, cellular respiration uses glucose and oxygen as substrates and produces carbon dioxide and water as products.

Balanced chemical reaction for cellular respiration is mentioned as under:

C₆H₁₂O₆ + 6O₂ -------------> 6CO₂ + 6H₂O + Energy (ATP)

(Glucose) (Oxygen) (Carbon dioxide) (Water)

<u>Photosynthesis & cellular respiration similarities:</u>

(1) Both of them are type of biochemical reactions which require enzymes.

(2) Both of them require exchange of gases.

7 0

4 years ago