calculate the number of oxygen atoms and its mass in 50g of CaCo3
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Answer

The two types of chemical bonds that atoms can form to achieve stability are called ionic bonds and covalent bonds. In ionic bonds, atoms donate or receive electrons to achieve stability. In covalent bonds, atoms share electrons to achieve stability.

Answer:

Explanation:

1.false

2.true

2.true

Magma that contains high silica content will have higher viscosity. This is because they exhibit greater rate of polymerization unlike magma with less silica content

Therefore the number 1 statement is false.

A Richter scale is a device that is used to calculate an earthquakes size from the amplitude of the largest wave recorded by a seismograph.

One unit on the scale represents a 10-fold increase in the magnitude of an earthquake.

Therefore the number 2 statement is true.

Magma is a liquid rock found under the earth which can find its way to the surface of the earth through cracks and holes.

When magma finds its way to the surface of the earth it is called lava.

Therefore statement 3 is false.

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Answer:

Formula in Hill system is I2O8. Computing molar mass (molar weight). To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use: Any chemical element.

Explanation:

Answer:

the answer is d. frequency

Answer:

0.138 moles of oxygen are needed to combine with 0.276 moles of carbon.

Explanation:

Given data:

Moles of oxygen needed = ?

Moles of carbon present = 0.276 mol

Solution:

Chemical equation:

2C  + O₂      →        2CO

Now we will compare the moles of carbon with oxygen.

              C            :          O₂  

              2            :            1

             0.276     :        1/2×0.276  = 0.138 mol

Thus, 0.138 moles of oxygen are needed to combine with 0.276 moles of carbon.

Answer:

true

Explanation:

Answer:

True

Explanation:

Because its true

Explanation:

products are Nacl + H20

Answer:

alot of things

Explanation:

Answer:

Warm Water

Explanation:

In warm temperatures, cold-blooded animals are more active and can travel more quickly. This occurs because heat activated reactions provide energy to move muscles. In the absence of heat the animal becomes slow and sluggish. So they are usually inactive and rest when it is cold. As they do not need to feed much, they spend less time looking for food, so this life strategy works for them.

Brainliest?

Answer warm water Explanation:i have the same question

Answer:

The work is -6,497.54 J

Explanation:

Work is the amount of energy transferred from one system to another by a force when a displacement occurs.

The work exchanged for a gas depends on the transformation it performs to go from the initial state to the final state.

The pressure - volume work done by a system that compresses or expands at constant pressure is given by the expression:

W= -P*ΔV

where

In this case:

Replacing:

W=  -570,459.8 Pa*0.01139 m³

Solving:

W=-6,497.54 J

The work is -6,497.54 J

Answer: The excess amount changes from a gas into a liquid or solid (ice). The process of water changing from a gas to a liquid is called "condensation," and when gas changes directly into a solid, it is called "deposition." These two processes are how clouds form.

Answer: Upper Case Alleles

Explanation: Lower case alleles are recessive

Answer:

If an atom gains or loses an electron, it bacomes an ion. An atom that gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion

Explanation:

A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge. Therefore it is a positive ion.

A fluorine atom will tend to gain, rather than lose, an electron. By gaining a negative electron, it has an overall negative charge. It has become a negative ion.

Answer:

B. Anions are formed when an atom loses electrons.

The statement about ions that is not correct would be B. Anions are formed when an atom loses electrons.

Anions are formed when an atom gains electrons. This means that they have more electrons than protons, giving them a negative charge. Cations are formed when an atom loses electrons. This means that they have fewer electrons than protons, giving them a positive charge.

The other statements are correct. Neutral atoms always have the same number of protons as electrons. This means that they are electrically neutral. Cations are positive ions, and anions are negative ions.

In conclusion, option B is correct.

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Answer:

If we look at the electron configuration of potassium (K), we see that it has one electron: [Ar]4s1. Obviously, removing that electron gives us [Ar] (same configuration as K1+), which is a noble gas and has 8 electrons. Valence electrons are generally regarded as being 'the outermost electrons' for a given atom

Answer:B. CO2

Explanation: It is B because it has both letters capitalized if it  is a compound and it only has 1 letter capitalized if it is an element.

Answer:

Microscope

Explanation:

Answer:

its a telescope you see stars or plants

Explanation:

This quantity = 0.298 nanograms(ng)

Mass is one of the principal quantities, which is related to the matter in the object

The main mass unit consists of 7 units of other than other units of mass such as quintals, tons, pounds, ounces:

Kilogram, kg

Hectogram, hg

Decagram, dag

gram, g

Desigram, with

centigram, cg

milligram, mg

Each unit descends then multiplied by 10, and if one unit increases then divided by 10

Conversion of other mass units:

10⁻³ g ⇒mg-milligrams

10³ g ⇒kg-kilograms

10⁻⁶ g ⇒µg-micrograms (mcg)

10⁶ g ⇒Mg-megagrams (tons)

10⁻⁹ g ⇒ng-nanograms

10⁹ g ⇒Gg-gigagram

10⁻¹² g ⇒pg-pikogram

2.98 x 10⁻¹⁰ g to nanograms(ng)

[tex]\tt 2.98\times 10^{-10}\times 10^9=0.298~ng[/tex]

Answer:

B

Explanation:

All are moving vertically but b is speaking about how they remove atmospheric carbon

Answer:

19.6 moles of aluminum sulfate

Explanation:

Given parameters:

Number of sulfur atoms  = 3.54 x 10²⁵  atoms

Unknown:

Number of moles of aluminum sulfate = ?

Solution:

Aluminum sulfate is expressed as;

        Al₂(SO₄)₃

  1 mole of Aluminum sulfate contains 3 moles of sulfur.

 6.02 x 10²³ atoms are found in 1 mole of any substance;

 3.54 x 10²⁵  sulfur atoms will be found in [tex]\frac{3.54 x 10^{25} }{6.02 x 10^{23} }[/tex]   =  58.8moles of sulfur

1 mole of Aluminum sulfate contains 3 moles of sulfur.

 or ;

      3 moles of sulfur is contained in 1 mole of aluminum sulfate

     58.8moles of sulfur will contain [tex]\frac{58.8}{3}[/tex] moles of aluminum sulfate

                                                       = 19.6 moles of aluminum sulfate

H₂ will have the highest average  kinetic energy

Energy because this motion is expressed as Kinetic energy (KE) which can be formulated as:  

[tex]\tt \displaystyle KE=\frac{1}{2}mv^2[/tex]

Average velocities of gases can be expressed as root-mean-square averages. (V rms)  

[tex]\large{\boxed{\bold{v_{rms}=\sqrt{\frac{3RT}{Mm} } }}[/tex]

R = gas constant, T = temperature, Mm = molar mass of the gas particles

From the two equations above, it can be concluded

So the highest KE is owned by the gas with the smallest molar mass

Molar mass of the gas :

A) H₂  : 2 g/mol

B) N₂ : 28 g/mol

C) O₂  : 32 g/mol

D) F₂ : 38 g/mol

So H₂ has the highest average  kinetic energy

At a constant temperature: E. All the gases will have the same average  kinetic energy.

According to the kinetic-molecular theory, the average kinetic energy of gas molecules (particles) is highly dependent on temperature.

Hence, the average kinetic energy of gas molecules (particles) is directly proportional to the absolute temperature of the gas.

At a constant temperature, all gases would have the same average kinetic energy according to the kinetic-molecular theory of gases.

In conclusion, all the gases would have the same average kinetic energy since the temperature is constant.

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Answer:

From Earth, the Sun looks like it moves across the sky in the daytime and appears to disappear at night. This is because the Earth is spinning towards the east. The Earth spins about its axis, an imaginary line that runs through the middle of the Earth between the North and South poles.

Explanation:

Answer:

The Earth rotates on its axis always, so it looks like the sun is moving but it is the Earth that's moving.

Explanation:

Hope this helps!

Answer:

AlCl₃

General Formulas and Concepts:

Explanation:

Step 1: Define

Al³⁺ and Cl¹⁻

Step 2: RxN

Al³⁺ (s) + Cl¹⁻ (g) → AlCl₃

Answer:

The answer is: AlCl₃

Hope this helped :)))

Explanation:

Answer:

Three primary reasons. First, there is simply more water-covered places than dry ground places for the animals and plants to have lived. Second, the seas are much more crowded with the kinds of life that leave fossils than the land is. Third, the process that form fossils work very well under water.

Explanation:

Answer:

Mass is conserverd

Explanation:

Any chemical reaction must follow the law of conservation of mass. Meaning that mass cannot be created nor destroyed. Since all chemical reactions must follow this law, no matter what reaction happens, mass is conserved.

Answer:

1. molarity is = 0.1174

2. molarity is = 9.3

3. molarity is =0.009392

Explanation:

Q#1.

mass of sucrose is 14.07g

molar mass of sucrose is 342 3g/mol

so, 14.07x1/342.3 = 0.0411

now the volume is of water is 0.35

so, 0.0411/0.35 = 0.1174

Q#2.

concentration is 4.5

so, 4.5x1/1000= 0.0045

then, 0.0411/0.0045 = 9.13

Q#3.

M1M1=M2M2

molarity of the same sucrose is 0.1174

so, diluted in 40mL

and the volumetric flask is 500mL

so, 0.1174x40/500= 0.009392