27/13AL+? ->> 24/11NA+4/2HE

Answer:

metamorphic

Explanation:

when one rock changes another rock the rock that got changed is now metamorphic

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]density = \frac{21.6}{8} \\ = 2.7[/tex]

We have the final answer as

Hope this helps you

Explanation:

magnesium  +  zinc oxide  --> magnesium oxide  +  zinc

Mg + ZnO --> MgO + Zn

Reactants:

- Magnesium

- Zinc Oxide

Products:

- Magnesium oxide

- Zinc

Type of reaction: Displacement Reaction

The provided word equation depicts a chemical reaction between magnesium and zinc oxide that results in the creation of magnesium oxide and zinc.

Magnesium and zinc oxide are the reactants in the process. These are the substances that alter chemically. The process produces magnesium oxide and zinc. These are the new chemicals produced by the chemical process. This reaction undergoes a chemical transformation, as indicated by the term equation. Magnesium oxide and zinc are formed when magnesium interacts with zinc oxide.

The reaction's stoichiometry is not explicitly stated in the word equation. We cannot establish the exact quantities of the reactants and products involved without further information or factors. The term equation denotes that the reaction obeys the rule of mass conservation. The total mass of reactants must equal the total mass of products.

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Answer:

Molecular formula describes about number of atoms of each constituent element present in any molecule.

Explanation:

Molecular formula describe about the number and type of atoms in any molecule.  A molecular formula is not a chemical name but instead it is a chemical formula of a compound. A molecular formula consist of chemical symbols for constituent elements followed by numeric subscripts which tells us about number of atoms of each element present in a molecule. For example : Ammonia is a compound of nitrogen and hydrogen i.e NH₃ . As there is only one N atom so we have written only N in it's molecular formula. But as there are 3-H atoms so we have written subscript 3 in H symbol in it's molecular formula. Molecular formula does not tell us anything about shape of molecule .

Answer:

A. write balanced chemical equation (including states), for this process.

Explanation:

Almost all hydrocarbon 'burn' reactions involve oxygen; it's by far the most reactive substance in air.  

Hydrocarbon combustions always involve  

[some hydrocarbon] + oxygen --> carbon dioxide + steam.  

C6H6(l) + O2 (g)--> CO2 (g)+ H2O (g)

Balance carbon, six on each side:  

C6H6(l) + O2 (g)--> 6CO2 (g)+ H2O (g)

Balance hydrogen, six on each side:  

C6H6(l) + O2 (g)--> 6CO2(g) + 3H2O (g)

Now, we have fifteen oxygens on the right and O2 on the left.  

Two ways to deal with that. We can use a fraction:  

C6H6 (l)+ (15/2)O2 (g)--> 6CO2 (g)+ 3H2O (g)

Or, if you prefer to have whole number coefficients, double everything  

to get rid of the fraction:  

2C6H6 (l)+ 15O2 (g)--> 12CO2 (g)+ 6H2O (g)

With the SATP states thrown in...  

C6H6(l) + (15/2)O2(g) --> 6CO2(g) + 3H2O(g)

Answer: 1. Phys 2. Phys 3. Phys 4. Chem 5. Chem 6. Phys 7. Phys 8. Phys

Explanation:

According to the concept of physical and chemical property ,reaction with water and flammability are chemical properties while rest are physical properties.

These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.

These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.

The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.

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Answer: 1cm³= 1mL

Explanation:

Answer: True

Explanation:

The matter exists as solid, liquid or gas. These are called the states of matter. The change of matter from one state to another can be achieved by heating or cooling.

The solid state can be converted into liquid state by providing heat to solid. The heat will make the particles move farther, resulting into liquid state.

Similarly when liquid state is provided heat, it changes to gaseous state. The heat will make the particles move much more faster.

Thus the statement that when heat flows to an object, it can change states is True.

Answer:

"2.Orbital." I think

Explanation:

Risk*

Answer:

E

Explanation:

Answer:B

Explanation:due to osmosis and osmoregulation of the cell membrane

Answer:

halogens

hope its right

Answer:

there combine with an acid called sodium chloride or magnesium sulphate

Moles of Butane combusted : 0.4982

Given

55.8 water vapour at STP

Required

moles of Butane

Solution

Reaction(Combustion of Butane) :

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

1 mol at STP = 22.4 L, so mol of H₂O for 55.8 L :

=55.8 : 22.4

=2.491 moles

mol H₂O based on Butane as a limiting reactant(excess  Oxygen)

From the equation, mol ratio Butane-C₄H₁₀ : H₂O = 2 : 10, so mol Butane :

[tex]\tt =\dfrac{2}{10}\times 2.491\\\\=0.4982[/tex]

Answer: The activation energy of a particular reaction determines the rate at which it will proceed. The higher the activation energy, the slower the chemical reaction will be. The example of iron rusting illustrates an inherently slow reaction.

Explanation:

(2.03x10^22)/(6.02x10^23) = .033721 mol Li

I hope this helps, if not, i am sorry

Answer:

B

Explanation:

it uses the process of the light reaction stage and Calvin cycle to trap sunlight in the day and make food at night

Answer:

I think the answer is A or B

Answer:

Heat is not something that can be contained since it is not a tangible thing. Heat is a process

Explanation:

The wrong thing in this statement "a mug of hot chocolate contains more heat than a glass of cold water."is: Heat is a process. Heat is not something that can be contained since it is not a tangible thing.

Heat can be defined as a state or quality of being hot or in a high temperature.

Heat can also be said to be a transfer of kinetic energy from one environment to another, from one medium to another, or from one object to another.

In conclusion, Heat is a process. Heat is not something that can be contained since it is not a tangible thing.

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to generate energy means to create energy. chemical energy is the energy that is created when you put effort into doing something..  

Answer: The earth spins while we also rotate around the sun the sun is well to us still when actually in reality the whole galaxy is moving but our planet spins and with it comes to night and day.

Explanation:

Answer/Explanation:

62.559%

mass of an element   X 100%

mass of the compound

Scientific Notation: 3.45 x 10^5

E Notation: 3.45e5

Answer:d

Explanation:

Answer:

Radiant Energy

Explanation:

Radiant energy is created through electromagnetic waves

Answer:

604,800 seconds in a week

Explanation:

86,400 seconds in a day

86,400 × 7 = 604,800

Answer:

The Milky Way is a large barred spiral galaxy

Explanation: that has more than etc

Answer:

Longer wavelengths self means by it's name that the distance between the trough and crust are lesser than that of shorter wavelengths!

The word Lower frequency implies lower energy, thus light cannot easily penetrate the EM wave to excite electrons.

Examples of EM waves with longer wavelength :

Radiowaves, microwaves, etc..