Density of mercurio is

Answer:

A chemical reaction occurs when a substance is rearranged to form a new substance. It is possible to identify if this has taken place from one of the five signs of chemical change. These changes include color change, temperature change, precipitate formation, gas production and light emission.

Explanation:

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Answer:

A chemical reaction occurs when a substance is rearranged to form a new substance. It is possible to identify if this has taken place from one of the five signs of chemical change. These changes include color change, temperature change, precipitate formation, gas production and light emission.

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Answer:

A i think is the answer

Answer:B

Explanation:

Answer:This chapter begins the first where we will look at matter on a microscopic scale.  Matter is made of small particles of atoms or molecules.  There are three common states of matter, solid, liquid and gas.  A gas and a liquid will change shape to fit the shape of their container.  A gas will change volume to fit the volume of the container.

Explanation:

In general, solids are denser than liquids, which are denser than gases. . The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other.   Their vibration is related to their kinetic energy.  In the solid the particles vibrate in place.

Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container. The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other.

Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other.  In most cases, there are essentially no attractive forces between particles.  This means that a gas has nothing to hold a specific shape or volume.

(A fourth state of matter, called plasma, exists when a gas becomes ionized. Plasma exists inside stars and in interstellar gases.)

Answer:

it is a latin word, so B

Explanation:

Answer:

A) The temperature at which the particles of matter are at their lowest energy points.

Explanation:

Absolute temperature refers to the lowest  possible temperature. At this state,  no heat energy remains in the substance; the energy of the particles are at their lowest energy points.

Answer:

D

Explanation:

Answer:

Diesel and kerosene.

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Answer:

Gasoline

Diesel

Kerosene

LPG

Rethanol

Ethanol

Butanol

Answer:

Neutrons have a neutral charge

Explanation:

A neutron consists of 3 quarks, 1 up and 2 down. The up quark has a charge of + 2/3e, and the down quarks each have a charge of - 1/3e. So, the charges on the 3 quarks tend to cancel out to produce a neutrally charged particle.

Answer:

Healthy kidneys clean your blood and remove extra fluid in the form of urine. They also make substances that keep your body healthy. Dialysis replaces some of these functions when your kidneys no longer work. There are two different types of dialysis - hemodialysis and peritoneal dialysis. The following is about hemodialysis.

Answer:

Where is the results and what is the question or is there a picture

Explanation:

Answer:

The pollution can cause resources to lessen.

Due to pollution, resources like air and water considered to be at risk, even though they are considered renewable.

Pollution is the presence on an environment or substance, harmful substances that are dangerous to the living organisms found in that environment.

Water and air pollution is a serious risk to human, animal and plant life in the environment.

Therefore, due to pollution, resources like air and water considered to be at risk, even though they are considered renewable.

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Answer:

7.2 meters per hour

Explanation:

It is given that,

The speed of a paramecium is 2,000 micrometers per second.

We need to find the speed of the paramecium in meters per hour.

We know that,

[tex]1\ \mu m=10^{-6}\ m[/tex]

and

1 hour = 3600 seconds

[tex]v=2000\ \dfrac{\mu m}{s}\\\\=2000\times \dfrac{10^{-6}\ m}{(\dfrac{1}{3600})\ s}\\\\=7.2\ \text{meters/hour}[/tex]

Hence, the speed of the paramecium is 7.2 meters per hour.

Answer:

B

Explanation:

the second option is right

Answer:

17

Explanation:

you add 19+19 the subtract 21. I think

A  potassium isotope contains 19 protons, 19 electrons, and 21 neutrons, so the mass number is 40 as the mass number of the atom is the sum of the protons and the neutrons, the mass number is 40.

The mass number is significant as it is the sum of the number of protons and neutrons present in nucleus of an atom, which determines the atomic weight of an element and also determines its chemical properties and its position on the periodic table. Isotopes of an element have the same atomic number but a different mass number, so they have different properties than the original element.

Hence, a potassium isotope contains 19 protons, 19 electrons, and 21 neutrons, so the mass number is 40 as the mass number of the atom is the sum of the protons and the neutrons, the mass number is 40.

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Answer: The chemical formula is Ch(HCO3)2 and Cn(HO3)2

Explanation:

There is 1 atom of Ba, 2 atoms of hydrogen, 2 atoms of carbon, and 6 atoms of oxygen.

The smallest particle of a substance has all of the physical and chemical properties of that substance.

The chemical formula Ba(HCO3)2 tells us about the number of atoms of each element present​ as follows:

1 atom of Ba

2 atoms of hydrogen

2 atoms of carbon

6 atoms of oxygen.

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Answer:

Name, Thallium. Symbol, Tl. Atomic Number, 81. Atomic Mass, 204.3833 atomic mass units. Number of Protons, 81. Number of Neutrons, 123. Number of Electrons, 81 ... It has a metallic luster when it is first exposed to air but it tarnish quickly

Explanation:

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Answer:

d = 16.96 g/mL

Explanation:

Given that,

Initial water level in graduated cylinder is 47 mL and final water level is 48.35 mL.

The weight of the neclace is 22.89 g.\

We need to find the volume of the necklace. We know that, density equals mass per unit volume. So,

[tex]d=\dfrac{m}{V_f-V_i}\\\\d=\dfrac{22.89\ g}{(48.35-47)\ mL}\\\\d=16.96\ g/mL[/tex]'

Hence, the density of Terry’s necklace is 16.96 g/mL.

Answer:

A

Explanation:

The new mine means the supply is high and the price is low, so she can afford the necklace

Answer:

The answer is 36 on edgenuity.

Answer:

Explanation:

In the context, a vial which is used in store medical samples is filled with water at room temperature. And the vial is kept on a cold water. Also a water bag containing warm water is kept near the vial.

The cold water kept at the bottom of the vial is having lower kinetic energy while warm water will have higher kinetic energy than the others. Since the water in the vial is at room temperature and it is in touch with the cold blue water, the water in the vial will loose or give its temperature to the cold blue water through conduction as well as convection process since temperature always flows from a hot body towards the cold body.

On the other hand, the warm water placed next tot he vial will give its temperature to the atmosphere.  

Answer:

D

Explanation:

as an endothermic process because the dough absorbs heat

The baking of a pizza be categorized as an endothermic process because the dough absorbs heat.

This is the type pf reaction in which heat is absorbed from the surroundings  in a reaction.

During baking, the oven which is the surrounding is usually hot which brings about the dough absorbing the heat. This depicts an  endothermic process and makes option D the most appropriate choice.

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The compound composed of these ions exhibits properties entirely different from the properties of the elements sodium and chlorine. Chlorine is poisonous, but sodium chloride is essential to life; sodium atoms react vigorously with water, but sodium chloride simply dissolves in water.

Answer:

A) Cu

(copper)

Answer:

The answer is "It updates reinforce the idea, because it has been checked and modified several times, making it longer lasting".

Explanation:

The description of its empirical data throughout the world is a scientific principle. It's also based on facts and is often extensively tested by researchers. Repetitive done by scientists testing helps to enhance its body of knowledge. As just a result of advances in technology, after observation, data collection, and findings evaluation, scientific facts are checked, modified, and verified.

Answer:303.15

Explanation:

Answer:

B. Chemical property

Explanation:

Answer:

B

Explanation:

a reaction has taken place in which you can't get back what you started with

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.