Which scientific phenomena strengthen wegener's theory?

Answer:

1.10 g H2

Explanation:

Answer:

C

Explanation:

The order of increasing size are electron, neutron, nucleus and atom.

The size of electron is the smallest among the given particles which followed by neutron that is bigger in size from electron but smaller than nucleus. Proton and neutron are located in the nucleus of an atom so it is bigger in size than neutron.

Atom is the largest among the given substances in which nucleus is present at the center and electrons are revolving around the nucleus in fixed orbits so we can conclude that electron is the smallest and atom is the largest particle.

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Answer:

A colloid is a mixture composed of particles in a dispersing medium. A colloid is defined by the size of the particles involved. If the particles in a mixture are on the scale of individual molecules, around 1 nanometer, it is defined as a solution. If the particles are larger than 1,000 nanometers, it is a suspension.

Explanation:

i hope this helps you!

The characteristics of colloids are (i) It is a heterogeneous solution (ii) Two phases are present in this solution (iii) It exhibit Tyndall effect (iv) It also exhibit Brownian movement.

Colloids is also called Colloidal system or Colloidal solutions are mixture in which one substance microscopically dispersed  insoluble particle is suspended throughout another substance.

The characteristics of colloids are:

Thus from the above conclusion we can say that The characteristics of colloids are (i) It is a heterogeneous solution (ii) Two phases are present in this solution (iii) It exhibit Tyndall effect (iv) It also exhibit Brownian movement.

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Answer:

Q = 1461.6 J

Explanation:

Given data:

Mass of ice = 36 g

Initial temperature = -20°C

Final temperature = 0°C

Amount of heat absorbed = ?

Solution:

specific heat capacity of ice is 2.03 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT =  0°C - (-20°C)

ΔT = 20°C

Q = 36 g ×2.03 j/g.°C×20°C

Q = 1461.6 J

Answer: The formula mass for sodium sulfate was calculated on page T-9. Referring to those numbers, the formula Na2SO4 means: two moles sodium (45.98 g), one mole is (32.06 g.

Explanation: Your welcome.

Answer:

chemical and physical

When elements form bonds, it changes their chemical and physical properties.

A chemical element is a species of atoms, including the pure material made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

A material that cannot be further decomposed by any chemical reaction is known as a chemical element. Each element's atom has a specific number of protons.

For instance, a carbon atom has six protons compared to the one proton in a hydrogen atom. Ions are created by changing the number of electrons in an element's atom.

Thus, When elements form bonds, it changes their chemical and physical properties.

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The limiting reactant : Na₂S

Reaction

Cu(NO₃)₂ (aq) + Na₂S (aq) ⇒ 2 NaNO₃ (aq) + CuS (s)

mol Cu(NO₃)₂ :(MW 187,56 g/mol)

[tex]\tt mol=\dfrac{469}{187.56}=2.5[/tex]

mol Na₂S :(MW 78,0452 g/mol)

[tex]\tt mol=\dfrac{156}{78.0452}=2.0[/tex]

Limiting reactant(smaller ratio⇒ between mol and coefficient) :

1 mol Cu(NO₃)₂ : 1 mol Na₂S , so the limiting reactant : Na₂S( 2 < 2.5)

Answer:

4.46 moles of Ethylene will produce 392.48 grams of Carbon dioxide.

Explanation:

The reaction is as follows

C2H4 + 3 O2 → 2 H2O + 2 CO2

For complete combustion of Ethylene 1 mole of ethylene gives 2 moles of Carbon dioxide.

using unitary method

1 C2H4 => 2CO2

4.46 of C2H4  => 2*4.46 CO2

                         =  8.92 CO2

No of moles  = given mass(w) /molar mass(M)

Molar mass of CO2 = 44g

8.92 = W / 44

W = 8.92 * 44

    = 392.48g

So 4.46 moles of Ethylene will produce 392.48 grams of Carbon dioxide.

4.46 moles of ethylene burns in oxygen to give 393 g of carbon dioxide and water.

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

Let's consider the reaction for the combustion of ethylene.

C₂H₄ + 3 O₂ → 2 H₂O + 2 CO₂

We can calculate the mass of CO₂ formed by the combustion of 4.46 moles of C₂H₄, considering the following relationships.

4.46 mol C₂H₄ × (2 mol CO₂/1 mol C₂H₄) × (44.01 g CO₂/1 mol CO₂) = 393 g CO₂

4.46 moles of ethylene burns in oxygen to give 393 g of carbon dioxide and water.

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Answer:

E. just before it reaches the ground.

Explanation:

The "kinetic energy" refers to the energy when an object moves or is in motion. When the ball leaves the racket, it is considered to have a great amount of kinetic energy. However, this decreases as the ball reaches its maximum height, but the potential energy is at its highest. Upon falling down, its kinetic energy increases but its potential energy decreases.

Provided that there's no air resistance, the speed of falling is even faster for the ball because of gravity and nothing is slowing it down, which means it will have a maximum kinetic energy just before it reaches the ground.

Answer:

60

Explanation:

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If a diver's tank is filled with a helium-oxygen mixture to a pressure of 170 atm and the partial pressure of helium is 110 atm, the partial pressure of the oxygen is 60 atm.

Dalton's theory of partial pressure states that total pressure of any mixture of gas is equal to the sum of the partial pressure of each gas present in that.

Given that total pressure of mixture = 170 atm

Partial pressure of helium = 110 atm

Partial pressure of oxygen = 170 - 110 = 60 atm

Hence partial pressure of oxygen gas is 60 atm.

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Answer:

correct is A, but it isn't quite right. Only when the electronegativity values of the two atoms are the same will the bond be 100% covalent.

Answer:

In every body cell

Explanation:

Answer: in every body cell

Explanation:

Answer:

d = 0.98 g/L

Explanation:

Given data:

Density of acetylene = ?

Pressure = 0.910 atm

Temperature = 20°C (20+273 = 293 K)

Solution:

Formula:

PM = dRT

R = general gas constant = 0.0821 atm.L/mol.K

M = molecular mass = 26.04 g/mol

0.910 atm × 26.04 g/mol = d × 0.0821 atm.L/mol.K×293 K

23.7  atm.g/mol = d × 24.1 atm.L/mol

d = 23.7  atm.g/mol / 24.1 atm.L/mol

d = 0.98 g/L

Answer:that is called Evaporation!

Explanation:

Answer:

evaporation

Explanation:

Answer:

Atoms of metal elements give away electrons in their reactions to form positive ions. The ions formed have a full outer electron shell, so are very stable.

Explanation:

To become stable, the metal atom wants to get rid of one or more electrons in its outer shell. ... Alternately, an atom that loses electrons becomes a positively charged ion (aka cations). The particles in an ionic compound are held together because there are oppositely charged particles that are attracted to one another.

Answer:

B

Explanation:

Answer:

480 million years old

Explanation:

Answer:

16 because carbon atom having usual 6 neutron have a mass number of 12 and that with 7 neutron has mass number of 13

5 atoms 1 potassium, 1 chlorine, and 3 oxygens, in total that is five

Answer:

[tex]737.45 \times {10}^{23} [/tex]

hope this will be true...

Answer:

D. A north pole and south pole attract each other

Answer:

D

Explanation:

Answer:

its looks unbalanced too me

Explanation:

Answer:

d

Explanation:

Answer:I believe its A. There noble gasses so there happy with there electron count!

Explanation:

Group 18 noble gases are relatively inert because their s and p orbitals are filled, meaning their outer energy level is filled. Therefore option 1 is correct.

The noble gases, which include elements like helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn), belong to Group 18 (VIII A) of the periodic table.

These elements have a full complement of electrons in their outermost energy level, also known as the valence shell. This outermost energy level is comprised of s and p orbitals.

Having a filled outer energy level makes noble gases highly stable and unreactive. The stability arises from the fact that their electron configurations are complete, meaning they have achieved a configuration similar to the noble gas that precedes them in the periodic table.

Because noble gases have no missing or unpaired electrons in their outer energy levels, they have little tendency to gain, lose, or share electrons with other atoms.

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Answer:

the volume should be in cubic cm so I assumed that you wanted to write the same . then the answer is 5489.07 kg/m^3

Answer:

[tex]\boxed {\boxed {\sf d\approx5.49 \ g/cm^3}}[/tex]

Explanation:

Density can be found by dividing the mass by the volume.

[tex]d=\frac{m}{v}[/tex]

The mass of the rock is 555 grams and the volume is 101.1 cubic centimeters.

[tex]m=555 \ g \\v= 101.1 \ cm^3[/tex]

Substitute the values into the formula.

[tex]d=\frac{555 \ g}{101.1 \ cm^3}[/tex]

Divide.

[tex]d=5.48961424 \ g/cm^3[/tex]

Let's round to the nearest hundredth to make the answer more concise.

The 9 in the thousandth place tells us to round up. In the tenth place, the 8 will become a 9.

[tex]d\approx5.49 \ g/cm^3[/tex]

The density of the rock is about 5.49 grams per cubic centimeter.

Answer:D) Cl-

Explanation:

Only cations are positive (+)

Cations are positively charged ions. Negatively charged ions are called anions. Among the given ions, Cl- is not a cation. It is an anion.

Ions are charged atoms formed by loss or gain of electron by atoms. Atoms with extra electrons or electron deficient will loss or gain electrons in order to achieve octet.

When atoms loss electrons, the number of their protons become dominant and they acquire positive charge.  When atoms gain electrons the number of electrons become dominant and atoms become negative charged.

The positive charged ions are called cations and negative charged ions are called anions. For example when potassium K loss one electron, it forms K+ ion. Similarly when Cl gain an electron it forms the anion Cl-.

Therefore, the one which is not cation among the given ions is Cl-.

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Answer:

Calcium phosphide (D)

Explanation:

Hope I helped^^

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