What does percent composition tell you about a molecule?
O A. It tells you the ratio of elements in the molecular formula.
OB. It gives you the total number of atoms in the molecule.
C. It tells you how much of a molecule is made up of each element.
O D. It tells you how the elements are arranged in the molecule.

Answer: The four forces acting on an aircraft in straight-and-level, unaccelerated flight are thrust, drag, lift, and weight.

Explanation:

Answer:

By using the criss cross method,the -1 charge of nitrate ion is shifted to ammonium ion and +1 charge of ammonium ion is shifted to nitrate ion. In this way, the final formula NH4NO3 is formed for the ammonium nitrate.

Explanation:

A hydrogen atom has an atomic number of 1.

So it's proton number will always be 1.

A neutral hydrogen atom does not have any charge.

So it has the same amount of electrons as protons, which turns out to be also 1.

A neutral hydrogen atom has an atomic mass of ≈1.00794amu≈1amu.

To find the amount of neutrons, we take the proton number and subtract it from the mass number.

1−1=0

So a neutral hydrogen atom has no neutrons.

In summary,

A hydrogen atom has

1 proton

1 electron

0 neutrons

another way of explaining:

The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons

Answer:

its letter d ..................................

Answer:

Mass = 88.12 g

Explanation:

Given data:

Mass of iron oxide = 126 g

Mass of iron formed = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO    →      2Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 126 g/ 159.69 g/mol

Number of moles = 0.789 mol

Now we will compare the moles of iron with iron oxide.

                     Fe₂O₃           :             Fe

                        1                 :               2

                  0.789              :            2/1×0.789 = 1.578 mol

Mass of iron:

Mass = number of moles ×molar mass

Mass = 1.578 mol × 55.84 g/mol

Mass = 88.12 g

Answer:

essentially through the use of keplers 3rd law comparing the proportionality of a planets squared versus cubed orbital patterns you can determine how fast a planet will orbit something and complete a full orbit

Explanation:

Kepler's Third Law: the squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits. Kepler's Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit. (from NASA)

Answer:

Start with the number of grams of each element, given in the problem. the mass of each element = the percent given. Convert the mass of each element to moles using the molar mass from the periodic table. Divide each mole value by the smallest number of moles calculated.

Answer:

a

Explanation:

the substance that exists

Answer:

the rock layer is at least 248 million years old

Explore

Answer:

38.9%

Explanation:

below, determine the mass percent of Fe3+ in a 0.6450 g sample of iron ore, if 22.40 mL of a 0.1000 M stannous chloride, SnCl2(aq), solution is required to completely react with the Fe3+ present in the ore sample. The chemical equation for the reaction is

2 Fe3+ (aq) + Sn2+ (aq) →2Fe2+ (aq) + Snº+(aq).

O 19.40%

O 6.196%

O 38.79%

O 9.697%

 2 Fe3+ (aq) + Sn2+ (aq) →2Fe2+ (aq) + Snº+(aq).ole of Sn2+

for every mole of Sn2+, tere are 2 moles of Fe3+

so there are 0.00224 X 2= 0.00448 moles Fe3+

iron atomic mass is 56

56 X 0.00448 = 0.251 gm Fe3+

so the mass % of the Fe3+ in the 0.645 gm iron ore sample is

(0.251/0.645) X 100 = 38.9%

Answer:the first one

Explanation:

Answer:

Ribosomes are found in both cells

Answer:

A. A random amount of light was released

Explanation:

A random amount of light was released. Hence, option A is correct.

An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom) or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The charge on a single electron is considered the unit electrical charge.

Electrons are sub-atomic particles that occupy energy levels in an atom of any chemical element. These electrons may move from one energy level to another.

Electrons may move from a lower energy level or ground state to an excited state or high energy level, or else move from a higher energy level to a lower energy level.

When an electron moves from a lower energy level to a higher energy level energy is absorbed by the atom, and when the movement is from a higher energy level to lower energy is released mainly as light.

Hence, option A is correct.

Learn more about electrons here:

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Answer:

4

Explanation:

atoms of O2 in the product side:

(3×2)+(2×1)=8

so to balance it:

x × 2 =8

x=4

Answer:

It becomes an ion

Explanation:

The element it took from becomes a positive ion

And chlorine becomes a negative ion

Answer:

I think Mg is correct I am not sure

Answer:

Nitrogen has 7 protons and 7 electrons and 7 neutrons.

Explanation:

The atomic number of an element is the number of electrons and protons they have. The atomic mass - the atomic number of an element equals the number of nuetrons. The atomic mass of nitrogen is 14 and the atomic number is 7 therefore we have to subract, 14-7=7.

Answer:

all the houses will be damaged

Explanation:

i voted for it

Answer:

left

Explanation:

Metals are to the left of the line (excluding hydrogen, which is a nonmetal), nonmetals are to the right of the line, and metalloids are to the immediate right of the line.

(Hope this helps can I pls have brainlist (crown)☺️)

The phrase which best describes the vapor point of a substance is Choice C; the temperature at which additional heat energy causes the substance to change from a liquid to a gas.

The vapour point of a substance by definition is the state of a substance at which upon addition of any amount of heat energy; he substance undergoes a phase change from liquid to solid.

Read. more;

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Considerando la definición de molaridad, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].

La molaridad es una medida de la concentración de un soluto en una disolución que se define como el número de moles de soluto que están disueltos en un determinado volumen.

La molaridad de una solución se calcula dividiendo los moles del soluto por el volumen de la solución:

[tex]Molaridad=\frac{numero de moles de soluto}{volumen}[/tex]

La Molaridad se expresa en las unidades [tex]\frac{moles}{litro}[/tex].

En este caso, sabes que una solución acuosa se preparó al mezclar 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. Entonces, sabes que:

Reemplazando en la definición de molaridad:

[tex]Molaridad=\frac{4 moles}{8 litros}[/tex]

Resolviendo:

Molaridad= 0.5 [tex]\frac{moles}{litro}[/tex]

Finalmente, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].

Aprende más:

Answer:

24.3

Explanation:

Two containers of gas have the same volume, temperature and pressure. One container has a sample of oxygen gas having a mass of 3.95g. The other container has a gas with a mass of 2.99g. Determine the molar mass of the gas in the second container.

O2 has a molar mass of 16 X 2 =32

the number of moles for O2 is the weight divided by the molar mass or, but since the two container have the same P,V, AND T they have the same number of moles since

PV =nRT

SO

the weight of the gas in the second container divided by its molar mass =

0.123

or

2.99/? = 0.123

so

? = 2.99/o.123 = 24.3

Answer:

Aluminum generally forms Al3+ ions. Oxygen generally forms O2− ions. So when the metal and the non-metal make music together they form a neutral compound, i.e. Al2O3 (i.e. 2×3−3×2=0) . The ionic bonding is so strong (due to charge magnitude) in this material that it is reasonably insoluble.

Explanation: