Calculate the net force
175 N
1125 N

Answer:

The atomic number of sodium is 11 (Z=11). The electronic configuration of sodium can be written as 2, 8, 1. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.

Explanation:

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Answer:

Physical changes only change the appearance of a substance, not

chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Explanation:

Answer:

This shoes the soda lime defusing to limewater turning into germinating seeding which defuses back to limewater

Explanation:

The ground state configuration : 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p¹

Electrons can move the shell up or down by releasing energy or absorbing energy  

It can be concluded that there are 2 conditions:  

Ground-state is the state of electrons filling the shell with the lowest energy levels.  

Excited-state is the state of electrons which occupies a higher energy level  

The state of excited electrons can be seen from the presence of electrons which do not fill the shell completely but fill the shell afterward  

Gallium (Ga) is a metal located in group 13, p-block and  period 4

Atomic number : 31

If we look at the options:

options 1,2 and 3 do not conform to Aufbau principle(Electrons occupy orbitals of the lowest energy level  ), because 3d orbitals do not exist and the number of electrons is also not 31

So that the most appropriate electron configuration is:

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p¹ = 31 electrons

or we can write : [Ar] 4s² 3d¹⁰ 4p¹

Answer: Its B/Climate

Im pretty sure if its wrong srry!

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Explanation:

Apart from different ways to classify soils. The one factor that scientists use to classify orders of soil is climate. Hence, Option (B) is correct

Climate is the long-term pattern of weather in a particular area.

Weather can change from hour-to-hour, day-to-day, month-to-month or even year-to-year.

A region's weather patterns, usually tracked for at least 30 years, are considered its climate.

Other factors people uses in classifying orders of soil are;

Soil orders are known as the single dominant attributes affecting soils in any location.

They can be the prevalent vegetation such as Alfisols and Mollisols or the type of parent material such as Andisols and Vertisols or the climate variables such as lack of precipitation etc.

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a) 80

b) 36

c)6

d)64

All in grams

the formula ; n= m

M

was used .

where n is moles

m is mass of a substance

M is molar mass

The mass of the substance is the product of the moles and the molar mass. The mass of sulfur = 80 gm, calcium = 72 gm, carbon = 6 gm, and copper = 201.6 gm.

Mass of any substance is the amount of the constituent particle it holds together and can be measured in grams. The mass has been calculated from the moles of the substance and its molar mass.

The mass of sulfur is calculated as,

Mass = moles × molar mass

= 2.50 mol × 32 g/mol

= 80 gms

The mass of calcium is calculated as,

Mass = moles × molar mass

= 1.80 mol × 40 g/mol

= 72 gms

The mass of carbon is calculated as,

Mass = moles × molar mass

= 0.50 mol × 12 g/mol

= 6 gms

The mass of copper is calculated as,

Mass = moles × molar mass

= 3.20 mol × 63 g/mol

= 201.6 gms

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Answer:

At the equator, the altitude is lower, and also because of the direct heating of sun rays on the surface, the temperature is much higher than at the poles. This makes the air near the surface hot and lighter and hence it rises up which results in lower air pressure.

Explanation:

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Answer:

1. 0.000045km

2. 307.15 Kelvin

3. 429.9014lb

7. 42.22222 celcius

8. 63200 mm

Answer:

Darmstadtium

Explanation:

An element with the electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d⁸ has 110 electrons in its electron shells.

Since the element is a neutral atom, this number is also equal to its atomic number. Therefore, its atomic number is 110.

The element in the period table that has an atomic number of 110 is Darmstadtium, a d-block element, thus a transittion metal. It also belong to period 7 in the Periodic table of elements.

The element that has the electron configuration is Darmstadtium.

Since An element with the electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d⁸ contains 110 electrons in its electron shells.

Also, the element should be a neutral atom, this number should also equal to its atomic number. Therefore, its atomic number is 110.

The element in the periodic table that has an atomic number of 110 is Darmstadtium, a d-block element, thus a transition metal.

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Answer:

To encourage readers to vary the design

Explanation:

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Mol ratio :

Pbs : O₂ : PbO : SO₂ = 2 : 3 : 2 : 2

mol PbO

[tex]\tt \dfrac{2}{2}\times 2.4=2.4[/tex]

mol SO₂

[tex]\tt \dfrac{2}{2}\times 2.4=2.4[/tex]

mol PbO

[tex]\tt \dfrac{2}{3}\times 2.4=1.6[/tex]

mol SO₂

[tex]\tt \dfrac{2}{3}\times 2.4=1.6[/tex]

(c) 5.3 mol PbS

mol PbO

[tex]\tt \dfrac{2}{2}\times 5.3=5.3[/tex]

mol SO₂

[tex]\tt \dfrac{2}{2}\times 5.3=5.3[/tex]

mol PbO

[tex]\tt \dfrac{2}{3}\times 5.3=3.53[/tex]

mol SO₂

[tex]\tt \dfrac{2}{3}\times 5.3=3.53[/tex]

Answer:

element

Explanation:

Answer

A

Explanation

letter a kase tama

Answer:

the answer is C

Explanation:

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Answer:

1.586 J/g°C

Explanation:

So, we have the formula [tex]q = mc\Delta t[/tex].

Since heat released by the metal is = to the heat absorbed by the water (because they eventually become the same temperature in solution), we can say

[tex]m_{water}C_{water}(T_{water}-T_f) = - m_{metal}C_{metal}(T_{metal} - T_f)[/tex]

Plugging in, we get:

[tex]59.2*4.184*(21- 34.9) = - 27*C_{metal}*(93 - 34.9)[/tex]

Solving, we get [tex]C_{metal} = 1.586[/tex] J/g°C.

Answer:

2.5 × 102 meters

Explanation:

Wavelength, which is denoted by λ, can be calculated using the formula:

λ = v/f

Where λ = wavelength (m)

v = speed of light (3×10^8m/s)

f = frequency (Hz)

According to the given information I n the question, f = 1.2 × 10^6 Hz, v = 3×10^8m/s

Hence;

λ = v/f

λ = 3 × 10^8 ÷ 1.2 × 106

λ = 3/1.2 × 10^ (8-6)

λ = 2.5 × 10^2

Therefore, the wavelength of the radio wave is 2.5 × 10^2 meters

Answer:

C - raising the temperature of a gas

Explanation:

as you raise temperature, kinetic energy rises, and so does pressure

Answer:

C.

raising the temperature of the gas

Explanation:

Edg. 2020

Other guy is right i got 100%

Answer:

Chemical reactions almost always have a change in energy between products and reactants. The total energy of a system must remain the same and sometimes a chemical reaction will absorb or release energy as light, heat or both. The energy change in a chemical reaction is caused by the amount of stored energy between the products and the reactants.

Explanation:

Answer:

p =7

e = 7

n = 7

Explanation:

proton = atom number

electron = atom number - muatan

neutron = mass nimber - atomic number

Answer:

An official Olympic Sized pool is 50 meters long by 25 meters wide.

Explanation:

Answer:

answer questions brain

Answer:

D

Explanation:

Rusting is a chemical change that occurs due to oxygen.

Answer:

d i had this your welcome

Answer: it’s D

yup!:)

If nitrogen gains two electrons, it becomes isoelectronic with fluorine.

There are five electrons on the outermost shell of nitrogen and a total of seven electrons in the atom. Recall that isoelectronic species are species that have the same number of electrons.

Fluorine is an element in group seventeen. There are nine electrons in fluorine. If nitrogen gains two electrons, it becomes isoelectronic with fluorine.

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Hello friend! Hopefully this helps you as much as needed!

An English scientist called John Newlands put forward his Law of Octaves in 1864. He arranged all the elements known at the time into a table in order of relative atomic mass. He then put the similar elements into vertical columns, known as groups.

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{0.256}{100} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Covalent Compounds and Diatomic Elements

Explanation: The two atoms that are held together by a covalent bond may be atoms of the same element or different elements. When atoms of different elements form covalent bonds, a new substance, called a covalent compound, results. Water is an example of a covalent compound.

Answer:

b

Explanation:

Answer:

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than are chemical names and structural formulae.

Explanation:

Have A Wonderful Day !!

Answer:

answer is true

Answer:

True

Explanation: