someone please help me js fill in the blanks

Answer:

ang hirap na nag tanung

Answer:

When isolated as a free element, chlorine takes the form of a greenish-yellow gas, which is 2.5 times heavier than air and smells like bleach. Chorine is the second-most-abundant halogen and the second-lightest halogen on Earth, after fluorine

Explanation:

Answer:

It amplifies the picture of something far away.

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Answer:

Light from the moon reflects from large mirror, bent by small mirror, focused at focal point, magnified by eyepeice.

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Answer:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted.

Explanation:

That is what I think on the subject

Answer:The chemical energy

Explanation:because The chemical energy in the food you eat is changed into another kind of chemical energy that your body can use. Your body then uses that energy to give you the kinetic energy that you use in everything you do.

Answer:

c i think

Explanation:

Answer:

A. Reversible Process

Explanation:

Going through the meaning of the options we have;

A Reversible: This reaction involves a backward and forward step.. This means that reactant  would react to form products and products in turn wold react to form reactants. This is the correct option.

B. Elementary process: This refers to a single step reaction with a single transition state and no intermediates. This option is wrong because that is not what the question says.

C. Equilibrium Reaction: This refers to a reaction in which there is no change in the concentration of the reactants and products. Rate of forward reaction is equal to the rate of backward reaction.

D. Forbidden Reaction: This is not the correct option.

E. Forward process: This refers to the reaction that involves reactants reacting to form products. This is also not correct as the question states that the products are also able to form reactants.

CH₃CH₂CH₃ is a compound which has lowest vapor pressure   at 25°C as it is a small chain compound without any functional group or substituent present in it.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compound,here:

https://brainly.com/question/13516179

#SPJ2

Answer:

A

Explanation:

Volume will help you determine whether is a solid or a liquid.

Have a great day

Explanation:

oh shi sorry I wish I could help but I'm stupid

Answer:

1. 2121

2. i have no idea

3. 212

Explanation:

Answer:

Explanation:

Answer:

I do because there are certain people that are right for you. If there was no such thing as soulmates, you could just get with anyone and it wouldnt matter. You dont just fall in love with anyone. You may mistake love for something else. But when you're in love you'll know. Twin flames are not the same. Some people mistake twin flames with soulmates. They are close but not so much in a way.

Explanation:

Answer:

Ye

Explanation:

Answer:

Argon is a member of the noble gas family of elements. This means that it already has eight valence electrons in its outermost shell. Because of this, Ar rarely bonds with other atoms to form compounds

Explanation:

Answer:

first you have to know the molecular formula of carbon which is C12H22O11, Then with that you can calculate the mass of each element in the molecule. C:12.01*12= 144.12, H: 1.008*22= 22.176, O: 16*11= 176

Explanation: give me brainliest pls

Answer:

a) pH = 11.5

b) pH= 3

Explanation:

a) lets calculate the number of moles of each reactant

moles of HCl = 32/1000 * 0.32 = 0.01024 mole

moles of NaOH = 42/1000 * 0.32 = 0.01344 moles

1 moles of HCl reacts with 1 moles of NaOH , so 0.01024 mole of HCl should react with 0.01024 moles of NaOH , but there is some excess NaOH.

excess NaOH= 0.01344 -0.01024 = 0.0032 moles

[H+]= [tex]\frac{10^{-14} }{0.0032} = 3.125 *10^{-12}[/tex]

pH= -log [3.125*10^-12) = 11.5

b)  moles of NaOH = 0.00924

excess HCl present = 0.01024 - 0.00924 =.001

so excess [H+] = 0.001

pH= -log( 0.001) = 3

Answer:

D. Valance Electrons

Explanation:

The law of conservation of energy can be applied to heat changes, i.e. the heat received/absorbed is the same as the heat released  

Q in = Q out  

Heat can be calculated using the formula:  

Q = mc∆T  

Heat released by anthracene= Heat absorbed by water

Heat absorbed by water =

[tex]\tt Q=500\times 4.18\times 25.89=54110.1~J[/tex]

mol of  anthracene (MW=178,23 g/mol)

[tex]\tt \dfrac{1.365}{178.23}=0.00766[/tex]

The enthalpy of combustion per mole of anthracene :

[tex]\tt \Delta H=-\dfrac{Q}{n}=\dfrac{54110.1}{0.00766}=-7063981.7~J/mol\approx -7064~kJ/mol[/tex]

Answer: They are made of nylon, steel or sometimes gut.

Explanation:

Answer:

CH3OH(l) + 3 2 O2(g) → CO2(g) + 2 H2O(l

Explanation:

.

Answer:

true i am pretty sure

Explanation:

the ans. is false (:) ok

Answer:

The main difference is that neutrons are neutral while protons are positive.

Explanation:

Neutrons have nor charge and protons have a positive charge. Hope this helps!

Answer:

Protons: Determine the element

Neutrons: Is for the Average atomic mass or AMU for short.

Explanation:

Answer:

Oppositely charged ions attract.

Explanation:

In an ionic bond oppositely charged ions attracts one another by electrostatic attraction.

Answer:

CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)

Explanation:

Methane is an hydrocarbon. Whenever hydrocarbon undergoes a reactio with oxygen, the products formed are carbon(iv) oxide and water.

The equation of the reaction is given as;

CH4 + O2 --> CO2 + H2O

Upon balancing the equation, we have;

CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)

The amount of CaCO₃ in the tablet : 0.5219 g

Reaction

1. CaCO₃(in antacid) + 2HCl⇒ CaCl₂+H₂CO₃

2. Titration ⇒ HCl+NaOH⇒NaCl+H₂O

For titration :

M₁V₁.n₁=M₂V₂n₂(n=acid/base valence⇒NaOH/HCl=1)

mol HCl=mol NaOH = excess HCl

[tex]\tt 27.2\times 0.09767=2.657~mlmol[/tex]

mol HCl

[tex]\tt 75\times 0.1746=13.095~mlmol[/tex]

Moles of HCl used (reacted with CaCO₃) :

initial HCl - excess HCl =

[tex]\tt 13.095-2.657=10.438~mlmol=0.010438~mol[/tex]

From reaction 1 :

mol HCl : mol CaCO₃ = 2 : 1

[tex]\tt mol~CaCO_3=\dfrac{1}{2}\times 0.010438=0.005219[/tex]

mass of CaCO₃ :

[tex]\tt 0.005219\times 100~g/mol=0.5219~g[/tex]

Answer: So you are matter, the apple, water, a computer etc.

Explanation: matter is anything that takes up space

Answer:

D- 31.9988 g/mol

Explanation:

The molar mass of a substance is the mass in grams of one mole of the substance. For a compound, the molar mass is the gram - formula mass or gram - molecular weight. It is determined by the addition of its component atomic masses;

  To find molar mass of O₂;

      Atomic mass of O = 15.9994g/mol

 Molar mass of O₂ = 2(15.9994) = 31.9988g/mol