Fluorine has seven electrons in its outermost shell. It will most likely try to join with an atom with _____.
seven electrons in its outermost shell
two electrons in its outermost shell
one electron in its outermost shell
eight electrons in its first shell

Answer:D- the actual solar system is too large

Explanation: just took the quiz

Answer: The actual solar system is to large.

Explanation: well it's not because its to small and definitely not because it's too simple. and because it moves slowly doesn't make sense. so its B. hope this helps :)

Answer:

math si hard

Explanation:

The mole fration of ethanol and water in a sample of rectified spirit which contains 95% of ethanol by mass is 0.8 and 0.11.

Mole fraction of any substance will be calculated by dividing the moles of that substance from the total moles of the solution.

Moles (n) will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given that 95% of ethanol by mass is present in the sample, so 95g of ethanol is present in 100g of solution.

Mass of solvent (water) = 100 - 95 = 5g

Moles of water = 5g / 18g/mol = 0.27mol

Moles of ethanol = 95g / 46g/mol = 2.06mol

Mole fraction of water  = 0.27 / (0.27+2.06) = 0.11

Mole fraction of ethanol = 2.06 / (0.27+2.06) = 0.8

Hence required mole fraction of water & ethanol is 00.11 and 0.8 respectively.

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Answer:

They go extinct

Explanation: When something is on earth and it gets used so much and then it's not in earth anymore that means it was used to much it went extinct (Take dinosaurs for example besides there death)

The elements no longer found on earth are extincted.When something is on earth and it gets used so much and then it's not in earth anymore that means it was used to much it went extinct.

An element is a atom's species that consist of proton in a proper number embeded in their nuclei, as well as pure substance a species consist of pure substance.

Carbon is an element which is a chemical by nature and it is represented by C and the atomic number of carbon is 6.The atomic structure of carbon is designed in such way that it contain 6 electron, 6 protons, and 6 neutrons.

The atomic mass of carbon is 12.011 u and the carbon contain 2, 4 electrons per shell with the electronegativity of 2.55 .The main function of carbon compounds to maintain earth's atmosphere and temperature and to supply energy that works as fuel for our economy.

The atomic structure of carbon is designed in such way that it contain 6 electron, 6 protons, and 6 neutrons.The atomic mass of carbon is 12.011 u and the carbon contain 2, 4 electrons per shell with the electronegativity of 2.55 .

Therefore,The elements no longer found on earth are extincted.When something is on earth and it gets used so much and then it's not in earth anymore that means it was used to much it went extinct.

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Answer: median :4.44 mean :4.11

Explanation:

i did test on Edge

Answer:

Neutral

Explanation:

A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.

Answer:

I believe it is neutral.

Explanation:

Since higher than 7 pH is alkaline, and lower than 7 pH is acidic.

Answer:

im pretty sure the answer is b

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Answer:

144 g of phosphorus contain 4.65 moles.

Explanation:

Given data:

Mass of phosphorus (P) = 144 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of phosphorus is 31 g/mol

Now we will put the values in formula.

Number of moles = 144 g/ 31 g/mol

Number of moles = 4.65 mol

Thus, 144 g of phosphorus contain 4.65 moles.

Explanation:

where there are negative or positive ions

Explanation:

Protons

Each element has an atomic number. The atomic numbers are listed along with the names and symbols of the elements on the inside cover of the text. The atomic number equals the charge on the nucleus. It therefore also equals the number of protons in the nucleus and also equals numerically the number of electrons in the neutral atom. The atomic number has the symbol Z.

Different elements have different atomic numbers; therefore, atoms of different elements contain different numbers of protons (and electrons). Oxygen has the atomic number 8; its atoms contain 8 protons and 8 electrons. Uranium has the atomic number 92; its atoms contain 92 protons and 92 electrons.

The relationship between atomic number and the number of protons or electrons can be stated as follows:

Atomic number= number of protons per atom= number of electrons per neutral atom

B. Mass Number Equals Protons plus Neutrons

Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.

Number of neutrons = mass number - atomic number

or

Mass number = number of protons + number of neutrons

The atomic number and the mass number of an atom of an element can be shown by writing, in front of the symbol of the element, the mass number as a superscript and the atomic number as a subscript:

mass number

atomic numberSymbol of elementorA

ZX

For example, an atom of gold (symbol Au), with an atomic number 79 and mass number of 196 is denoted as:

196

79Au

C. Isotopes

Although all atoms of a given element must have the same atomic number, they need not all have the same mass number. For example, some atoms of carbon (atomic number 6) have a mass number of 12, others have a mass number of 13, and still others have a mass number of 14. These different kinds of the same element are called isotopes. Isotopes are atoms that have the same atomic number (and are therefore of the same element) but different mass numbers. The composition of atoms of the naturally occurring isotopes of carbon are shown in Table 4.2.

TABLE 4.2 The naturally occurring isotopes of carbonIsotopeProtonsElectronsNeutrons12

6C66613

6C66714

6C668

The various isotopes of an element can be designated by using superscripts and subscripts to show the mass number and the atomic number. They can also be identified by the name of the element with the mass number of the particular isotope. For example, as an alternative to

12

6C,13

6C,and14

6C

we can write carbon-12, carbon-13, and carbon-14.

About 350 isotopes occur naturally on Earth, and another 1500 have been produced artificially. The isotopes of a given element are by no means equally abundant. For example, 98.89% of all carbon occurring in nature is carbon-12, 1.11% is carbon-13, and only a trace is carbon-14. Some elements have only one naturally occurring isotope. Table 4.3 lists the naturally occurring isotopes of several common elements, along with their relative abundance.

TABLE 4.3 Relative abundance of naturally occurring isotopes of several elementsIsotopeAbundance (%)hydrogen-199.985hydrogen-20.015hydrogen-3tracecarbon-1298.89carbon-131.11carbon-14tracenitrogen-1499.63nitrogen-150.37 oxygen-1699.76oxygen-170.037oxygen-180.204IsotopeAbundance (%)silicon-2892.21silicon-294.70silicon-303.09chlorine-3575.53chlorine-3724.47phosphorus-31100iron-545.82iron-5696.66iron-572.19iron-580.33 aluminum-27100

Answer:

yes

Explanation:

everything will change

Answer:

Chocolate drink can easily be dissolved in Hot water than cold water.

Explanation:

Chocolate drink can easily be dissolved in Hot water than cold water because hot water has more heat or thermal energy than cold water. When water is heated and becomes hot, the molecule of water gain alot of energy and this make it to move very fast and as these molecules move faster, they begin to come in contact with the molecules of chocolate drink, thereby making it to dissolve faster than that of cold water.

Answer: neutral

Explanation: An atom is made up of three major sub-atomic particles namely protons, electrons and neutrons. The electrons form a cloud around the nucleus and are bound to the nucleus by electromagnetic forces.

Answer:

Trigonal Pyramidal

Explanation:

You have [tex]AX_3E_1[/tex] configuration which corresponds to a trigonal pyramidal structure.

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]

From the question

actual density = 0.7 g/cm³

error = 0.7 - 0.63 = 0.07

So we have

[tex]p(\%) = \frac{0.07}{0.7} \times 100 \\ = 10[/tex]

We have the final answer as

Hope this helps you

Answer:

The glass cup falling from the counter

Explanation:

the glass isn't changing in any chemical way. it's still made of the same material, just broken apart.

Answer:

144 g of phosphorus contain 4.65 moles.

Explanation:

Given data:

Mass of phosphorus = 144 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of phosphorus is 31 g/mol

Now we will put the values in formula.

Number of moles = 144 g/ 31 g/mol

Number of moles = 4.65 mol

Thus, 144 g of phosphorus contain 4.65 moles.

Answer:

2.98 moles of NaCl are produced.

Explanation:

Given data:

Moles of sodium = 2.98 mol

Amount of chlorine = excess

Moles of NaCl produced = ?

Solution:

Chemical equation:

2Na + Cl₂    →     2NaCl

Now we will compare the moles of sodium chloride with only sodium because sodium is limiting reactant and chlorine is in excess thus sodium limit the yield of product.

                    Na        :        NaCl

                    2          :            2

                 2.98        :          2.98

2.98 moles of NaCl are produced.

Answer:

the types of minerals in the rock

Answer:

C

Explanation: I took the test and got it right (first person is right)

Answer:

Explanation:

Answer:

Final volume=V₂ = 216.3 mL

Explanation:

Given data:

Initial volume = 120.0 mL

Initial temperature = -12.3 °C (-12.3 +273 = 260.7 K)

Final volume = ?

Final temperature = 197.0 °C (197+273 = 470 K)

Solution:

We will apply Charles Law to solve the problem.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁

V₂ = 120 mL × 470 K /260.7K

V₂ = 56400 mL.K /260.7K

V₂ = 216.3 mL

Answer:

Mass = 2.8 g

Explanation:

Given data:

Number of molecules of CO = 6.2×10²²

Mass of CO = ?

Solution:

We will use Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

For given  6.2×10²² molecules of CO mass will be,

1 mole = 6.022 × 10²³ molecules of CO

6.2×10²² molecule × 1 mole/  6.022 × 10²³ molecules of CO

0.1 mol

Mass of CO:

Mass = number of moles  × molar mass

Mass = 0.1 mol  × 28 g/mol

Mass = 2.8 g

Answer:

4.8*10^6

Explanation:

Simply count the number of decimal places moved to the left until you get 1 digit IN front of the decimal

Answer:

collect more sunlight

Answer:

to collect more sunlight

Explanation:

I

go to CALIFORNIA VIRTUAL ACADEMY ONLINE SCHOOL WITH K12

Answer:

Empirical formula is Cr₂O₃.

Explanation:

Given data:

Percentage of Cr = 68.4%

Percentage of O = 31.6%

Empirical formula = ?

Solution:

Number of gram atoms of Cr = 68.4 / 52 = 1.3 2

Number of gram atoms of O = 31.6 / 16 = 1.98

Atomic ratio:

                            Cr               :         O

                           1.32/1.32     :       1.98/1.32

                               1              :        1.5

Cr : O = 1 :  1.5

Cr : O = 2(1 : 1.5)

Empirical formula is Cr₂O₃.

Answer:

they will repel each other

Explanation:

When these two are brought close to one another they will repel each other. This is similar to what happens with magnets, when two objects share the same polarity one object will create a repulsive force upon the second object and push it away. This repellent force is caused by an electric field from the same charged electrons in the atoms of the object. Since in this case both the glass rod and the pinwheel have a negative charge they will repel each other when they come into proximity of one another.

Answer:

106.7 degrees f

Explanation:

Answer:

It's probably C

The forces between liquid particles are weaker than the forces between solid particles. This means that liquid particles are further apart and can move about more easily. Since the particles can move, the liquid can flow and take the shape of its container

Sorry if the answer is wrong!!!!!!