If I have 2.4g of magnesium, how many g of oxygen(O2 ) will I need to react completely with the magnesium? 2Mg +O2 → MgO

Answer:

I think it's C or D Sorry if I'm Wrong

Explanation:

it just makes the most sense to me

Answer:

84400cg

Explanation:

100000 cg in 1kg

100000(8.44)=84400cg

Answer:

True.

Explanation:

This is because when the number of protons in the nucleus increases the neutrons needed for a stable nucleus increases even more rapidly.

Best of luck!!!

Answer:

Reverberation is

Explanation:

Reverberation is psychoacoustics and acoustics is persistence of sound after the sound is produced.

Answer:

If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time. Thus, the principle of faunal succession makes it possible to determine the relative age of unknown fossils and correlate fossil sites across large discontinuous areas.

Answer:

pressure

Explanation:

the metore put pressure on the earth, so the earth shifted

Answer:

14 neutrons.

Explanation:

Hope this helps!

Answer: there's 13

Explanation:

Answer:

5) A change in the state of matter is caused if enough what is added to or removed from a object.

A) thermal energy

C) potential energy

D) force

Answer:

The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.

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Answer:

I think it should be B

Explanation:

Covalent bond is between non metals

Answer:

A derived unit is a unit that results from a mathematical combination of SI base units. We have already discussed volume and energy as two examples of derived units.

Answer: B

Explanation:

It’s different part and functions keeping the cell alive. Hope I helped

Answer:

S = 32.653061%

0⁴ = 65.3061%

Explanation:

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Answer:Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. The chemical symbol for Hafnium is Hf. Neutron Number and Mass Number of Hafnium Mass numbers of typical isotopes of Hafnium are 176-178, 179, 180.

Explanation:

Answer:

hvncsdvbfnnmgfhgjhkgnbdffhfgjgfjfjgjgjgfjfgjgfjfjfgjgfjfhfdhdhdhhdgfgdhdfhfdhd

Explanation:

jfdhfdhfdhdfhhdfhdfhhdfhdfhfdhrdhdfhfhhdhdf

Answer:

helium and neon are both noble gases their outermost shells are full or stable the elements will agree with the statement s above

Answer: Sodium is made up of lots of salt.

Explanation:

Eating a lot of salt can cause your body to retain more water, which can show up on the scale as extra pounds. But we're not just talking about water weight here. High salt diets appear to be linked to higher body fat in particular, the kind of fat that accumulates around your middle.

Answer:

The total energy stays the same.

Answer he isn't interested in learning about you

Explanation: i hope u are okay queen

Answer:

C

Explanation:

Particles inside the nucleus = protons + neutrons = mass number = 84

particles outside = electrons number = atomic number

Answer:

number 2 formation of substance in a different state

The element X is titanium.

According to the question, the percentage by mass of Cl in XCl4  is 75.0%.

The percentage by mass is obtained from;

Mass of element in the compound/molar mass of compound * 100

Hence;

Let the mass of the unknown element be X

75 = 142/X + 142 * 100

75 (X + 142) = 142 * 100

75X + 10650 = 14200

75X =  14200 - 10650

X = 14200 - 10650/75

X = 47

Hence, X is titanium.

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Answer:

848.4 moles of Co

Answer:

a) Area of the telescope lens is [tex]$1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]

b) Technician needs to clean the lens [tex]$1.83 \times 10^{3} s$[/tex].

Explanation:

a) The area of the lens is [tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}$[/tex]

To convert it into [tex]$f t^{2}$[/tex]

[tex]$1 \mathrm{~mm}=0.00328084 \mathrm{ft}$[/tex]

[tex]$1 \mathrm{~mm}^{2}=(0.00328084)^{2} \mathrm{ft}^{2}$[/tex]

[tex]$1 \mathrm{~mm}^{2}=1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]

So,

[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.439 \times 10^{3} * 1.076391014 \times 10^{-5} \mathrm{ft}^{2} .$[/tex]

[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.93088174 \times 10^{-2} \mathrm{ft}^{2}$[/tex]

b) Time required to polish a entire area of lens

[tex]$=6.439 \times 10^{3} \mathrm{~mm}^{2} \times \frac{43.5 \mathrm{~s}}{1.53 \times 10^{2} \mathrm{~mm}^{2}}$[/tex]

[tex]$=1.83 \times 10^{3} \mathrm{~s}$[/tex]

Learn more about scientific notation, refer:

1 - energy 2- heat 3 -plant

Answer:

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).

Explanation:

Answer:

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).

Explanation:

Answer:

Explanation:

1.An atom with a neutral charge are expected to have the same number of electrons and protons from Henry assumption (1914).

2. An atom with different number of electrons and protons are charge atom and they are called ion.

3. Yes.

Answer:

Ice melts when heat is provided to it.

Explanation:

When heat is provided, the kinetic energy of the particles increases. The particles start vibrating. As you keep providing heat, the particles start vibrating more strongly and with greater speed. Some particles become so energetic, that they are able to break the force of attraction and move away as a liquid.

Hope this helps.