I’m second guessing myself here...

Answer:

15

Explanation:

3 Calcium

3 Carbon

9 Oxygen

Answer:

there needs to be a picture to answer

Answer:

The material is 30 years old.

Explanation:

The decay of radioactive isotopes can be modelled by the following ordinary differential equation:

[tex]\frac{dm}{dt} = -\frac{m(t)}{\tau}[/tex] (Eq. 1)

Where:

[tex]m(t)[/tex] - Current mass of the isotope, measured in grams.

[tex]\tau[/tex] - Time constant, measured in years.

[tex]\frac{dm}{dt}[/tex] - Rate of change of the isotope in time, measured in grams per year.

After some handling, we find that the solution of the differential equation is:

[tex]\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }[/tex] (Eq. 2)

Where:

[tex]m_{o}[/tex] - Initial mass of the isotope, measured in grams.

[tex]t[/tex] - Time, measured in years.

Now we clear time within the expression above:

[tex]t = -\tau\cdot \ln \frac{m(t)}{m_{o}}[/tex]

Besides, we determine the time constant in terms of the half-life ([tex]t_{1/2}[/tex]), measured in years:

[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (Eq. 3)

If we know that [tex]t_{1/2} = 10\,yr[/tex] and [tex]\frac{m(t)}{m_{o}} = 0.125[/tex], then the age of the material is:

[tex]\tau = \frac{10\,yr}{\ln 2}[/tex]

[tex]\tau = 14.427\,yr[/tex]

[tex]t = -(14.427\,yr)\cdot \ln 0.125[/tex]

[tex]t \approx 30\,yr[/tex]

The material is 30 years old.

Answer:

The reaction rates cannot charge

Explanation:

Answer:

The answer is B

Explanation:

Answer:

Pretty much, yes!

Explanation:

The cell starts like this: o

First, the DNA inside the cell replicates and condenses into chromosomes. The also gathers all the materials necessary to divide and duplicates some organelles. (represented by 0)

Then the chromosomes pair up and are pulled to opposite poles of the cell. Then, the membrane pinches (invaginates) in in preparation to make two cells (8).

Then, cytokinesis occurs, when the cytoplasm splits and two new cells are formed (oo)

Answer:

2.4

Explanation:

Divide 7.0 by 3.0 you get 2.333333 then round it of to 2.34

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{698}{50.5} \\ = 13.8217...[/tex]

We have the final answer as

Hope this helps you

Answer:Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. The loss or gain of valence electrons allows ions to obey the octet rule and become more stable. Ionic compounds are typically neutral. Therefore, ions combine in ways that neutralize their charges.

Explanation:

Ionic bonds tend to form between two atoms with a high electronegativity difference.

Explanation:

So, from this, we can conclude that ionic bonds tend to form between two atoms with a high electronegativity difference.

Learn more about ionic compounds here:

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Answer:

More i think im remembering correctly

Explanation:

Answer:

Explanation:

Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.

Answer:

The electronegativity from order of least to highest is:

Ne, Ca, Fe, F

Explanation:

Elements in the periodic table have been arranged based on their level of electronegativity (which is the ability of an atom to attract electrons).

According to Paulings scale of rating elements based on their electronegativity, the electronegativity value of Fe, Ca, Ne, and F are 1.83, 1, 0 and 3.98 respectively.

Hence, based on Pauling scale, the order of electronegativity from least to highest is:

Ne > Ca > Fe > F

Answer:

Steam is an invisible gas

Explanation:

so A. Gas

Answer:

gas

Explanation:

Answer:

As a rough rule, five pounds of dry ice will turn from a solid to a gas in 24 hours. It's best to pick up the block of ice just a few hours before your party so it's as frozen as possible when the bash starts.

Explanation:

Answer:

technology that detects radio waves identified a pulsar at the center of the nebula

Explanation:

Crab nebula(M1) is a blob-like patch which is supernova remnants as far as Constellation of Taurus is concerned.

It has apparent magnitude of 8.4 and can only be viewed by telescope. The astronomers make use of technology that detects radio waves, which identified a pulsar at the center of the nebula, this pulsar is a magnetized rotating compact star which is known with it's electromagnetic emissions.

Answer:

technology that detects radio waves identified a pulsar at the center of the nebula

Explanation:

Answer:

D

Explanation:

This answer is correct; if you want you can use context clues, the middle two are not benefits, the first one is just absurd, so the only other logical answer id D. Also, its true.

The middle two are negative, and therefore cannot be benefits no matter how they are looked at.

For an explanation of the first answer and why it's wrong, read the comments.

The molecules of Nitrogen, oxygen, and N₂O are  2, 1, and 2 respectively.

A chemical equation can be defined as the expression of a chemical reaction in terms of the chemical symbols of the substances. A chemical equation has reactants, formed products, and an arrow indicating the direction of the reaction.

The equation in which the number of atoms of each element is equal on either side of the chemical equation of a reaction is called a balanced chemical equation.

According to the law of mass conservation, the total mass of the elements on the reactant side should be equal to the total mass of elements on the product side.

Given, the chemical equation of the reaction of nitrogen ad oxygen gas can be written as:

2N₂  +  O₂ → 2N₂O

The number of molecules of Nitrogen gas is 2 and the molecules of oxygen gas are one and the molecules of N₂O are equal to 2.

Learn more about the chemical equation, here:

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Answer:

does this help? 17.342%

Explanation:

Answer:

1. 3 elements: C, H, O

2. 10

3. 4

4. 20

Explanation:

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

From the question we have

[tex]volume = \frac{50}{0.785} \\ = 63.694267...[/tex]

We have the final answer as

Hope this helps you

Hello good afternoon...God bless the answer to your following question is D

because...A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.

Answer:

The answer is D, I would type it out but it is to long and I'm kind of lazy, but anyways! Your answer is D

Hope This Helps!

Answer:

D

Explanation:

It would be D because it would increse yes in population because the panthers are decreasing and attacking less. But, it would still level off because there are other predators who can kill the white tailed deer. Also the panther who is endangered could still atack even though theres just a few left that does not affect them from attacking. So it would increase but it would still level off.

Answer:

Covalent

Explanation:

Titanium on reaction with chlorine forms Titanium tetra chloride(TiCl4).

Titanium holds strong covalent bond with chlorine in TiCL4

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

volume = final volume of water - initial volume of water

volume = 56.4 - 50 = 6.4 mL

We have

[tex]density = \frac{53.78}{6.4} \\ = 8.403125[/tex]

We have the final answer as

Hope this helps you