Please help me 30 pointsss dont guess please be sure

Answer:

2 Electron is the required answer

Answer:

As you know 1.00 moles of carbon to grams 12.0107

4.00 moles of carbon to grams is 48.0428

The molecular formula for Carbon is C. The SI base unit for amount of substance is the mole.

Explanation:

Answer:

See explanation

Explanation:

The third law of thermodynamics states that "the entropy of a perfect crystal of a pure substance approaches zero as the temperature approaches zero" (Wikipedia).

One example of the third law of thermodynamics has to do with steam. Steam is gaseous water. Since it is a gas, its molecules are free to move around therefore its entropy is high. When the temperature of the steam is decreased below 100 degrees, the molecules of steam loose energy and turn into liquid water and do not move as freely as they did in the gaseous state. If the temperature is further decreased to yield ice at zero degrees, the molecules of water are "frozen" in their positions and the entropy of the system decreases to zero.

Also, the ions in ionic crystal solids move around when the substance is in solution or in molten state hence the substance conducts electricity. When the ionic substance is in solid state, the ions do not move about and the entropy of the solid system tends towards zero.

Answer:

It only makes objects float if they are less dense than their surroundings, like a boat on water, or a helium balloon in air. Buoyancy works due to displacement. ... In the case of a balloon, the helium inside the balloon weighs less than the same volume of air the balloon displaces

Explanation:

Answer:

In the case of a balloon, the helium inside the balloon weighs less than the same volume of air the balloon displaces. ... So a helium balloon has two opposing forces acting on it: gravity pulling it down, and buoyancy pushing it up. Buoyancy wins, so you can't really weigh a balloon, even though it does have weight.

Knowing the volume of air displaced by the helium balloon, we can calculate the maximum mass the balloon can lift. ... Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l. Thus, a one-liter balloon of helium can lift a mass of (1.18-0.164) = 1.02 g.

Answer:

The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy, and gravitational energy.

Explanation:

Answer:

Atoms have a central nucleus with positively charged protons and neutral neutrons; negatively charged electrons circle the nucleus. The electrons that are involved in chemical bonding are those electrons in the outermost orbit, referred to as valence electrons.

Explanation:

Chemical bond refers to the way in which atom bond with each other

A chemical bond is a form of attraction or bond that exist between atoms, ions or molecules. This bond allows the formation of chemical compounds.

The bond can be as a result of electrostatic force of attraction.

Therefore, Chemical bond refers to the way in which atom bond with each other

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Answer:

During cellular respiration, a glucose molecule is broken down into carbon dioxide and/or water.

Answer:

respiration is a process of gaining. energy and it use a row material like oxygen and glucose and the products will be ATP(energy), ethanol, CO2 the cellular part which is responsible for this is mitochondria, please this process is involved by yeast

Answer:

D

Explanation:

The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K

In the diagram of a transverse wave of electromagnetic radiation P represents frequency.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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#SPJ5

Answer:

false

Explanation:

Answer:

16 mol CO2

Explanation:

Answer:

16 mol CO2

Explanation:

Based on the energy requirements or generation, reactions can be classified as either endothermic or exothermic. The reactions which need energy to proceed are known as endothermic reactions. The reactions in which energy is released are known as exothermic reactions. In other words, energy is supplied to endothermic reactions and is obtained from exothermic reactions.

The given reaction is:

CH_4 (g) + 2O_2 (g) -> CO_2 (g) + 2H_2O (g)

Here, methane reacts with oxygen to generate carbon dioxide and water.

The binding energy of a molecule is defined as the difference between energy of that molecule and its elements (in their ground state). The binding energy of the various species used in this reaction are:

methane: -75 kJ/mol

oxygen: 0

carbon dioxide: -394 kJ/mol

water: -242 kJ/mol

Thus, we can see that the formation of products will release more energy than reactants. We can also calculate the energy change when this reaction takes place.

Energy change = binding energy of products - binding energy of reactants

= -394 + 2 x (-242) - (-75) + 2 x 0 = -803 kJ/mol

negative sign indicates that the energy is released.

Thus, this reaction is exothermic and generates 803 kJ of energy per mole.

Hope this helps.

I think that you should use your phone

Answer:

A. They both require a human to make them.

Explanation: The main difference between current and charge: Current: It is the rate of flow of charge (generally electrons). Current (I) is the physical quantity measured in amperes (A). Charge: It is the deficiency or excess of electrons on a body surface.

Answer:

See explanation

Explanation:

According to the wave mechanical model of the atom, electrons in the atom exhibit wavelike properties.

Unlike in Bohr's model where electrons were believed to be found in orbits of specified energy, electrons are found in orbitals which are defined as regions in space within which there is a high probability of finding an electron in accordance with the Heisenberg uncertainty principle.

An orbital is described by four sets of quantum numbers.

Answer:

Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. In cellular respiration sugar with the help of oxygen is broken down into ATP (energy molecule).

Na₂C₂O₄(aq) + Pb(NO₃)₂⇒PbC₂O₄(s) + 2NaNO₃(aq)

Given

Word equation

Required

Balanced equation

Solution

Convert to skeleton equation

Na₂C₂O₄(aq) + Pb(NO₃)₂⇒PbC₂O₄(s) + NaNO₃(aq)

Balanced equation

Give a coefficient

Na₂C₂O₄(aq) + aPb(NO₃)₂⇒bPbC₂O₄(s) + cNaNO₃(aq)

Make an equation

C, left = 2, right =2b⇒2b=2⇒b=1

Na, left = 2, right = c⇒c=2

O, left = 4+6a, right = 4b+3c⇒4+6a=4b+3c⇒4+6a=4.1+3.2⇒6a=6⇒a=1

The equation becomes :

Na₂C₂O₄(aq) + Pb(NO₃)₂⇒PbC₂O₄(s) + 2NaNO₃(aq)

Answer:

Atoms of sulfur = 9.60⋅g32.06⋅g⋅mol−1×6.022×1023⋅mol−1

Explanation:

because the units all cancel out, the answer is clearly a number, ≅2×1023 as required.

Answer:

Hydrocarbon fuels like methane (CH4) burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy. When energy is released during the course of a chemical reaction, it is said to be an EXOTHERMIC reaction. The combustion of of methane gas releases 50.1 kJ/g.

true

The burning of methane in the presence of air is an exothermic reaction. The given statement is true.

Exothermic Reaction:

The chemical reaction in which heat energy is released during the reaction.

For example-  the burning of 1 mole of methane in the air releases 810 kJ of heat energy.

[tex]\bold {CH_4 +2O_2 \rightarrow CO_2 + 2H_2 O}\ \ \ \ \ \ \ \bold{\Delta H = 810\ kJ}[/tex]

Therefore, the burning of methane in the presence of air is an exothermic reaction.

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Answer:

Fe2(SO4)3 + 3BaCl2 → 2FeCl3 + 3BaSO4

Answer:

1. Ask a question

2. form a hypothesis

3. Ask a question

Explanation:

Answer:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Explanation:

Answer:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Explanation:

Option D, Plate Tectonics

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Answer:

Not enough sunlight is captured in these areas of the leaves.

Explanation:

Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water in the presence of sunlight.

The sunlight is the energy source which drives this chemical change or reaction.

Answer:

THE 1st one

Explanation:

Answer:through the conduction from magma to water and rocks

Explanation:

Answer:

225kg.m.s

Explanation:

Momentum equals to mass times velocity