example of a man-made object that has been changed by weathering

Answer:

yuh because it's the hot water :)

Answer:

The interference is 8

Explanation:

Answer: During a chemical reaction, matter cannot be created nor destroyed, matter can change form through physical and chemical changes, but through any of these changes, matter is conserved; even though the matter may change from one form to another, the same number of atoms exists before and after the change takes place.

Explanation: <3

Answer:

Part 1 calcium and strontium have same properties as magnesium because all three are in same group.

Part 2 As atomic number of potassium is 19 so it contains 19 protons and 19 electrons because it is neutral

Potassium has 20 neutrons because its mass is 39

We can find neutron = atomic mass - atomic number

Explanation:

Answer:

B.

Explanation:

Answer:

Cobalt lose 3 electrons and donate 12 electrons.

Explanation:

In the periodic table,cobalt has nine electrons .It has lost 3 electrons,so it is only six left.Once it forms the complex,each ammonia donates a pair of electrons.

Answer:

0.5kg

Explanation:

Given parameters:

Speed of the object  = 12m/s

Kinetic energy  = 36J

Unknown:

Mass of the object  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

     K.E = [tex]\frac{1}{2}[/tex] m v²  

 Insert the parameters and solve;

    36  =  [tex]\frac{1}{2}[/tex] x m x 12²

     36  = 72m

       m  = 0.5kg

Explanation:

green is dominate and theres a G in each box that makes it all Green

Answer:

+ 3

Explanation:

please mark me brainliest

Answer:

it's A I think

Explanation:

hope u pass on this homework

Answer:

Orion Nebula

Explanation:

That is an enormous cloud of gas and dust

CH3OH and CH3CH2CH2OH will easily dissolve in water based on polarity not on size.

In chemistry, polarity describes the type of bonds that exist between atoms. Atoms share electrons when they join forces to form chemical bonds. When one of the atoms applies a stronger attractive force to the bond's electrons, a polar molecule is created.

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Mass of water needed : 96.3 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles H₂O=

[tex]\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35[/tex]

mass H₂O(MW=18 g/mol) :

[tex]\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g[/tex]

Answer:

Explanation:

A petrifying well is a well which gives objects a stone-like appearance. If an object is placed into such a well and left there for a period of months or years, the object acquires a stony exterior.

Answer:

Compare your two units. The two units must measure the same thing.

For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.

or

Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.

For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.

Explanation:

Hope this will help

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Answer:

Water. Chemical Formula: H2O.

Table Salt. Chemical Formula: NaCl.

Sucrose (Sugar) Chemical Formula: C12H22O11.

Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.

Toothpaste. Chemical Formula: CaCO3 or NaF.

Explanation:

The rate constant at 366K is 0.58 s⁻¹.

Ea = 108 kJ/mol = 108000 J/mol; an activation energy of a reaction

T₁ = 275 K

k₁ = 4.60 × 10⁻⁶ 1/s; the rate constant at 275 K

T₂ = 366 K

R = 8.314 J/Kmol

k₂ = ?; the rate constant at 366 K

Arrhenius equation: ln(k₁/k₂) = Ea/R (1/T₂ - 1/T₁)

ln(4.60 × 10⁻⁶s⁻¹/k₂) = 108000 J/mol/8.314 J/Kmol × (1/366K - 1/275K)

k₂ = 0.58 s⁻¹

For all chemical reaction some energy is required and that energy is called activation energy (energy that needs to be absorbed for a chemical reaction to start).

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NH4NO3 The molar mass is 80.04336 g/mol

N2O5 The molar mass is 108.01.

NaCN The molar mass is 49.00717 g/mol

(NH4)2SO4 The molar mass is 132.139 g/mol .

Molar masses

The mass in grams of one mole of a chemical is its molar mass.

1) What is the mass of 5.6 L of CO2 gas at STP?

PV = nRT is the ideal gas equation, which links pressure (P), volume (V), and absolute temperature (T).

where R = 8.314 Jmol K-1, the universal gas constant.

1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 atm = 1.1310 5 Nm 2

V=nRT/P =1.8.14.273/(1.013.10 5) =0.0224 m 3

2.24 liters

As a result, a gas's molar volume at STP is 22.4 litres.

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Answer:

its rather B or C

Im sorry if I was wrong

Explanation:

Answer:

Because helium has more molecules trying to escape at faster rates

Explanation:

Answer:

helium filled balloons tend to deflate over time faster than air filled balloons do because, the average velocity of helium molecules is higher than that of molecules of any gas found in air, so helium escapes through the pores in the balloon more quickly.

Explanation:

after researching I found this and tried to respond as quickly as possible!! hope this helps but it has something to do with the molecules .

Answer:

here is my answerrrrrrr

Mass of CO₂ = 132 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mole also can be formulated :

[tex]\tt n=\dfrac{mass}{MW}[/tex]

moles of CO₂ = 3

mass of CO₂(MW=44.01 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=3\times 44.01\\\\mass=132.03~g\approx 132~g[/tex]

Answer:

2px orbital...

Orbitals are represents the wave-like behavior of an electron or pair of electrons in an atom. Therefore it shows 2pX orbital.

The four fundamental kinds of orbitals are s, p, d, and f. The spherical form of a s orbital can accommodate two electrons.

Each of the three p orbitals has the same fundamental structure but differs in its spatial orientation. Up to six electrons can fit into the p orbitals.

The s sublevel can only hold two electrons because it has one orbital. The p sublevel has three orbitals and a maximum capacity of six electrons.

The d sublevel may hold a maximum of 10 electrons due to its five orbitals. Additionally, the 4 sublevel has 7 orbitals and a maximum of 14 electrons.

Thus, it shows 2pX orbital.

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Answer:

 [tex]\frac{3}{2}[/tex]

Explanation:

Given formula of Gypsum:

               CaSO₄. xH₂O,

       True formula:

              CaSO₄. 2H₂O,  x  = 2

Formula of plaster of paris  = CaSO₄. [tex]\frac{1}{2}[/tex] H₂O,

               y  =  [tex]\frac{1}{2}[/tex]

The difference between x and y; x - y:

               x  - y = 2 -  [tex]\frac{1}{2}[/tex]  =  [tex]\frac{3}{2}[/tex]