Read the time line. A timeline. The timeline lists the following years: 100 B C E, 1 C E, 100 C E, 200 C E, 300 C E, 400 C E, 500 C E. What time intervals are used on the time line? one year one hundred years five hundred years one thousand years

Answer:

If the protons in the atom outnumber the  electrons, the isotope has more positive charges than negative charges but If the number of electrons exceeds the number of protons, the ion charge will be negative.

Explanation:

The charge of an isotope is defined by how many more protons there are than electrons.

Or the other way around.

For example if there are 4 protons and 2 electrons, the ion charge is +2 because there are more protons.

If there are 4 electrons and 2 protons, the ion charge is -2 because there are more electrons.

Answer:

There arr 1.5*1024 molecules in 2.40 moles of H2O.

Answer: 15.83 mol

Explanation:

To convert from atoms to moles, we will need to use Avogadro's number.

Avogardo's number: 6.022×10²³ atoms/mol

[tex]9.53*10^{24} atoms*\frac{1mol}{6.022*10^2^3 atoms} =15.83 mol[/tex]

Now, we know that there are 15.83 moles.

Answer:

bioremediation

Explanation:

Answer:

No. The aim of modern agriculture is to make a profit and be a continuing business not be sustainable to the planet. GMOs, pesticides, herbicides, monoculture, tillage, antibiotics

Explanation:

Answer:

Explanation:

So basically is just explain what radioacitvity and then radidoactive

Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.

Answer:

Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.

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Explanation:

Answer:

B,D,E

Explanation:

Answer:

carbon dioxide is acidic and when it comes in contact with blue litmus paper it turns red

Explanation:

Answer:

7.21 x 103 kg/m3

Explanation:

Dimensional analysis has been the process to establish and convert the various units in the measurement. The density of manganese in kg/m3 is 7.21 × 10³ kg/m³.

Dimensional analysis has been the method that is also referred to as the unit factor or factor label method. It solves the mathematical expressions by multiplying the given value with another without changing its quantity and amount. It is used to change the units of the value.

Given,

Density of manganese = 7.21 g/cm³

The dimensional analysis method is used to convert grams per cubic centimeter into kilograms per cubic meter as:

1 gram / cubic centimeter = 1000 kilogram / cubic meter

So, 7.21 g/cm³ = X kilogram / cubic centimeter

Solving for X as:

X = 7.21 g/cm³ × 1000 kilogram / cubic centimeter

X = 7.21 × 10³ kg/m³

Therefore, 7.21 × 10³ kg/m³ is the density.

Learn more about dimensional analysis, here:

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Answer:

yess...

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Answer:

Yess

Explanation:

Ask your question please.

Answer:

1 cm^3 = 1 mL

Then

400 cm^3 = 400mL

Now convert mL to L

400/1000

0.4liter

Explanation:

Force = Mass × Acceleration

20 = 2.0 × A

A = 20/2 = 10m/s^2

( I got you fam. )

Answer ( assuming that your brother is doing 4,000 grams and not 4 grams ) :

around 8 pound's

Explanation:

1 gram = around 0.002 gram's

4,000 x 0.002 = 8

8 pound's :-)

Answer:

The answer is

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

mass = 468 g

Density = 17 g/L

Substitute the values into the above formula and solve

We have

[tex]volume = \frac{468}{17} \\ = 27.529411[/tex]

We have the final answer as

Hope this helps you

Answer: Complete ionic equations dissociate all aqueous solutions into ions. Net ionic equations show the change that occurs in chemical reactions and do not show spectator ions that are the same in reactants and products. (b) If no spectator ions were present then complete and net ionic equations would be identical.

Explanation:

Answer:

Which in

Explanation:

Given :

A balanced chemical equation :

[tex]Zn +Cl_2->ZnCl_2[/tex]

To Find :

How many grams of zinc are needed to produce 12 grams of zinc chloride.

Solution :

Moles of [tex]ZnCl_2[/tex] ,

[tex]n=\dfrac{Given \ wt}{Molecular\ Mass}\\\\n =\dfrac{12}{136.30}\ mol\\\\n=0.088\ mol[/tex]

Now, by balanced chemical equation we can say that 1 mol of Zn produce

1 mol of [tex]ZnCl_2[/tex] .

So, 0.088 mol of Zn is required to produced 0.088 mol of [tex]ZnCl_2[/tex] .

[tex]Mass \ required = molecular \ mass \times moles\\\\m = 65.38 \times 0.088\\\\m=5.8 \ gm[/tex]

Therefore, 5.8 grams of zinc is required.

Hence, this is the required solution.

Answer: True

Explanation:

Answer:

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Answer:

Explanation:

we know that specific heat is the amount of heat required to raise the  temperature of substance by one degree mathmeticaly

Q=mcΔT

ΔT=T2-T1

ΔT=26.8-10.2=16.6

C for water is 4.184

therefore

Q=1.00*4.184*16.6

Q=69.4 j

now we have to covert joule into calorie

1 calorie =4.2 j

x calorie=69.4 j/2

so 69.4 j =34.7 calorie thats why 34.7 calorie heat is required to raise the temperature of water from 10.2 to 26.8 degree celsius

Answer:

Curd is acidic in nature, because an acidic substance has less value of pH. A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline? Answer: By making the milk more alkaline, it takes more time to turn into curd.

Answer:

A. 20 B.40 C. Ca D. 10 E. 9 F. F

Explanation:

Answer:

A.) 20

B.) 40

C.) Ca

D.) 10

E.) 9

F.) F

Explanation:

just did it on edge 2020 & got it correct....

Answer:

Giga, 1x10⁹.

Explanation:

Hello,

In this case, if we chew over Google's name, we can see that it suggests the word Giga which in conversion units context accounts for the Giga prefix (G) which has a value of 1x10⁹.

For instance 1 meter in gigameters is:

[tex]1m*\frac{1Gm}{1x10^9m}=1x10^{-9}Gm[/tex]

Which suggests that it is a huge unit and it makes sense considering the raft of information Google handles.

Regards.

Answer:

The answer is

Explanation:

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

From the question

mass = 6.05 g

volume = 19 mL

The density of the substance is

[tex]density = \frac{6.05}{19} \\ = 0.3184210526...[/tex]

We have the final answer as

Hope this helps you

1, 2, and 3

hope it helps next time upload with picture