How many atoms of Ca are in 1.65 mol of Ca?

Answer:

yes

Explanation:

Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. A distinctive property of the liquid state is surface tension, leading to wetting phenomena. Water is, by far, the most common liquid on Earth.

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brainliest?!

Answer:

The answer is Yes

Explanation:

Barium Hydroxide + Hydrogen Bromide = Barium Bromide + Water =

Double Displacement

Answer:

one-half

Explanation:

cuz for a first order reaction is a half life independent of concentration and constant over time

Nitric acid, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water.

There are THREE different elements and a total of FIVE atoms in nitric acid.

The formula for nitric acid is HNO3. This means there is one atom of hydrogen, one atom of nitrogen, and three atoms of oxygen in one molecule of nitric acid.

So, Thus, your answer will be FIVE if you're counting the molecules but if you are counting the elements then it is THREE.

-Snooky

Answer:

the answer is electron....

Answer:

carbon

Explanation:

Carbon forms compounds that make up about 18 percent of all the matter in living things. The processes by which organisms consume carbon and return it to their surroundings constitute the carbon cycle.

Answer:

Selenium

Explanation:

One way to figure this out is to count the electrons and add them up.

2+2+6+2+6+2+10+4 = 34 electrons

A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.

Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)

When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.

Answer:

Nature is important

Explanation:

Answer:

All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.

Answer:

0.13 grams of O2

Explanation:

Just did worksheet

The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!

Answer:

Element   Symbol   Atomic Mass   # of Atoms  Mass Percent

Chlorine              Cl       35.453                             2        29.670%

Calcium                Ca     40.078                      1         16.770%

Oxygen                 O   15.9994                             8            53.559%                              

Explanation:

Answer:

A

Explanation:

Florine F and Bromine Br these two elements have same physical and chemical properties. Hence option A is correct.

Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and  the elements in the periodic table.

The electrons which are completely filled orbitals are called as core shell electrons and which are not filled completely are called as valence electron. valence electrons are responsible for physical and chemical properties of the element. Elements which are on same column in periodic table have same number of valence electrons . Hence they have same properties.

Chlorine, Florine and bromine comes in halogen group. it require only one electron to complete its Octet rule. chemical and physical properties are decided by the valence electron of the element. As Florine and Bromine has same valence electron as chlorine. their properties also likely to be same.

Hence option A is correct.

To know more about atom :

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Answer: D

Explanation:

because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can

Answer:

WhAT

Explanation:

WTH

Answer:

Our discussion up to now has centered on types of bonds that involve. This kind of bonding is called ionic bonding (as you are almost certainly already aware). NaCl is a solid at room temperature, with a very high melting point (801 °C), similar highly reactive metal – sodium (Na), and a pale green gas – chlorine (Cl2).

Explanation:

I hope this is what you needed. I also hope that you have a great day.

Answer:

8.85 because im smart

solar wind: gives comets their tail

solar flares: a big explosion on the surface of the sun

sunspots:every 11 years there is a peak in the number of them

Answer:

Explanation:a

Oakk

Answer:

8 moles of oxygen.

Explanation:

The chemical formula for barium hydroxide is Ba(OH)₂

This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.

4 moles of Ba(OH)₂ will have 8 moles of oxygen.

The number of moles of oxygen atoms we have in the compound is 8 moles .

The chemical equation for barium hydroxide is as follows:

Ba(OH)₂

According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.

Therefore, 4 moles of the compound can be represented as follows;

4 Ba(OH)₂

This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.

Therefore, we have  8 moles of oxygen atoms or 4 moles of oxygen molecules.

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Answer:

Calcium

Explanation:

It has similar properties as Magnesium (Mg) and Strontium (Sr)

The Atomic number of Calcium (Ca) is 20

The Atomic number of Krypton is 36

The Atomic number of Magnesium is 12

12 < 20 < 36

Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as  the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

Answer:

strong winds that blow in short spurts over a small distance

Explanation:

Generally, the most common factor that causes the largest waves in the ocean is winds. this is also called wind-driven waves of the ocean when the surface wind flows on the surface of the ocean, this disturbance creates the friction between surface wind and surface of the ocean which creates waves in the ocean

Answer:

B

Explanation:

k-12 test

Answer:

Inside the DNA molecules

Answer:

Genes give instructions to proteins; protein structure determines traits.

Explanation: