What is the concentration of an AlCl3 solution if 150 mL of the solution contains 350. mg of cr ion?

Answer: hello!

formula: P1/T1=P2/T2

P1= 225

T1= 23 C (296 K)

P2= ?

T2= 97 C (370 K)

equation: 225/296 = ?/370

Explanation:

you are going to start by cross multiplying 225 and 370.

225 x 370= 83250

now you are going to divide your answer by 296

83250 / 296= 281.25

so your answer for P1 is 281.25

Answer:

Susssssssssssssssy

Explanation:

Sup

Answer:

75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH

which means the formula for the acid must be H3A and

the value of x in

HxA is 3

Explanation:

75ml of a solutipn of 0.1moL  l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?​

the concentration of both the and the base are the same at 0.1M

the base...NaOH has 0.1 moles/L of OH ion

75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH

which means the formula for the acid must be H3A and the value of x in

HxA is 3

Answer:

K2CO3(aq) + CaC12(aq) –> CaCO3(s) + 2Cl(aq) 2.

Explanation:

The number of moles of the excess reagent there would be is 3.9 moles

From the question,

We are to determine the number of moles of the excess reagent there would be.

The given balanced chemical equation is

N₂ + 4H₂O → 2H₂O₂ + N₂H₄

This means,

1 mole of N₂ is required to react completely with 4 moles of H₂O

Now,

If 1 mole of N₂ is required to react completely with 4 moles of H₂O

Then,

2.8 moles of N₂ will react completely with 11.2 moles of H₂O

∴ H₂O is the excess reagent

Number of moles of H₂O that would remain = 15.1 mol - 11.2 mol

Number of moles of H₂O that would remain = 3.9 mol

Hence, the number of moles of the excess reagent there would be is 3.9 moles

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Answer:

A unit for measuring work is called the foot-pound

The answer is A this is a conclusion.

Answer:

b. have the same kind number of complete shells

Answer:

oil and water

Explanation:

oil and water - When you put oil and water together they do not mix. Therefore, these are a heterogeneous mixture since they are two separate parts.

Answer: C, B, A

Explanation:

C is the initial solution, because naoh has not been added yet

B is the midpoint of the titration.  naoh has been added to the solution, but it has not fully reacted yet. You can tell that this one is the midpoint because there is still HF- in the diagram, which is not one of the products formed in the reaction.

A is the endpoint because the diagram shows that all products are fully formed. There is an increased amount of Na+ and H2O in the diagram and no HF- left.  

PS. I tested this answer on the concentration of acetic acid post-lab (from mcgraw hill) earlier today and it said this was the right answer :) hope this helps

The correct sequence of diagram from initial solution to the solution at the equivalence point of the reaction is C → B → A.

In the equivalence point of the acid-base titration, amount of acid will equal to the amount of base and no other ions withh present except water and salts.

In the given question there is a titration between an acid (HF) and a base (NaOH).

Hence, correct sequence is C → B → A.

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Answer:

The equation is Fe₂O₃ + CO ⇒ Fe + CO₂.

The balanced reaction equation is Fe₂O₃ + 3CO ⇒ 2Fe + 3CO₂.

Explanation:

First, we have to write our equation. It's actually pretty straightforward - first we look for our reactants (looks like it's Fe₂O₃ and CO), then we look for our products (Fe and CO₂). Then, we have to balance it so that both sides have the same number of both element.

Currently, we have the equation Fe₂O₃ + CO ⇒ Fe + CO₂. There are 2 Fe atoms, 4 O atoms, and 1 C atom on the left side. There is 1 Fe atom, 2 O atoms, and 1 C atom on the right side.

First thing we can do is give our Fe on the right side a coefficient of 2. This will make it equivalent to the 2 Fe atoms on the left side:

Fe₂O₃ + CO ⇒ 2Fe + CO₂

Next, we need to make sure that we have the same number of C and O atoms on each side. This takes a little bit of thinking, but what we have to do is give CO a coefficient of 3 and CO₂ a coefficient of 3. This gives us 6 O atoms on the left side (when we include the O₃) and 6 O atoms on the right side (since there are 3 O₂ atoms and 3 times 2 is 6). Here's what that looks like:

Fe₂O₃ + 3CO ⇒ 2Fe + 3CO₂

And that's how I balanced the equation. It can be confusing, but with enough practice, it will get easier and easier. :)

Well one mole of carbon specifies 6.022×10²⁴

INDIVIDUAL carbon atoms, i.e. a mole of carbon.........

Explanation:

And thus we take the quotient.......

[tex] \frac{1.35 \times {10}^{24} ·C·atoms}{6.022 \times {10}^{24} \times C \times atoms } = 2.24 \: mol \\ [/tex]

- BRAINLIEST ANSWERER

Answer:

Use dimensional analysis:

1.27x1024 atoms C x 1 mol C/6.02x1023 atoms = 2.11 mol C

Explanation:

Answer:

212 gm of CH2Cl2 are formed

Explanation:

4.6 CONCEPT ASSESSMENT Suppose that each of these reactions has a 90% yield. CH4(g) + Cl2(g) - CH2Cl(g) + HCl(g) CH3Cl(g) + Cl2(g) - CH2Cl20) + HCl(g) Starting with 50.0 g CH4 in the first reaction and an excess of Cl2(g), the number of grams of CH2Cl2 formed in the second reaction is (a) 50.0 X 0.81 x (85/16) (c) 50.0 X 0.90 X 0.90 (b) 50.0 X 0.90 (d) 50.0 X 0.90 X 0.90 < (16/50.5)(70.9/85)​H

1st, rewrite the equations so you can see the problem easier

reaction (1)    CH4 +Cl2--------->CH3CL + HCl

reaction (2)   CH3Cl + Cl2------> CH2Cl2 + HCl

the product ib reaction (1) is CH3Cl and is formed with a 90%  yield.

90% of the reactant methane iis converted to methyk chloride.

methane (CH4) has a molar mass of 12 + 4X1 =16

you start with 50.0 gm of CH4,

SO

50.0/16 =3.125 moles of CH4

90% of this become methyl choride...CH3Cl

SO

0.90  X 3.125 = 2.8 moles of CH3Cl are formed

NOTE 90% HAS ONLY 2 SIGNIFICANT FIGURES SO YOU ARE LIMITED TO 2 SIGNIFICANT  FIGURES IN YOUR CALCULATION!

in reaction(2) 1 mole of methyl chloride becomes methyl dichloromethane yi

with again a 90% yield

0.90 X 2.8 = 2.5 moles of CH2Cl2 are formed

so

2.5 moles of CH2Cl2 are formed.

CH2Cl2 has a molar mass of 12 + 2X1 + 2X35.5 =

12 + 2 + 71 =85

1 mole weighs  85 gm

2.5 moles weigh 2.5 X 85 = 212 gm

X

Answer:

Number of atoms = 5.1345 x 10²³

Explanation:

Given:

Mass of sodium = 19.6

Find:

Number of atoms

Computation:

We know that atomic mass of sodium is 22.98

So,

Number of atoms = [Mass of sodium/atomic mass of sodium]Avogadro's number

Number of atoms = [19.6 / 22.98]6.02 x 10²³

Number of atoms = 5.1345 x 10²³

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Answer:

Just dissolve in water , you can separate

Explanation:

because salt dissolves in water but sand doesn't

Explanation:

sedinentation and decantation

Answer:

is 2K(s)+2H2O(l)→2KOH(aq)+H2(g).

Explanation:

Answer:

pls explain better so we understand

Answer:

4 protons, 5 neutrons, 4 electrons to have the neutral Be atom

the only way to make a negative Be is to have more than 4 electrons

Explanation:

Make a neutral Beryllium atom by adding protons, neutrons and electrons. Now, what would you do to make a

beryllium atom with a negative charge?

Be has an atomic number of 4, an atomic mass 9

its atomic number tells us it has 4 protons, with a +4 charge

its atomic mass = neutrons + protons, so it has 5 neutrons with no charge

its neutral atom will have 4 electrons each with a negative charge to balance the +4 total proton harge.

so

4 protons, 5 neutrons, 4 electrons to have the neutral Be atom

to make a negative Be species, it still must have an atomic number of 4,

or it is not Beryllium

so the only way to make a negative Be is to have more than 4 electrons

Answer:

Yes

Explanation:

By forcing the atoms into a new configuration is possible.

The addition of new atoms around the atom will change the electronic geometry of the atoms. The addition of electron-accepting or donating atoms will result in a change in configuration. The configuration change will result in the change in the hybridization of the atom, and it will acquire a new shape. The geometry of the molecule changes and it will acquire the lowest energy state.

This suggests that atoms in real molecules are present in the flexible state of configuration, and are at least energy, The change in the surrounding changes the configuration of the atoms, and are easily configured.

Answer:

?????????????????????????????????????

Explanation:

This question is asking for the complete, ionic and net ionic chemical equations for the reaction between liquid bromine with a solution of hydrochloric acid and cobalt (II) iodate mixed with a solution of iron (III) oxalate.

In this case, according to the given information, it turns out possible to figure out the required, by considering that the complete chemical equation has the correct balance and states of all species involved, the ionic one shows the ionizable species and the net ionic do not show any spectator ion. In such a way, we proceed as follows:

a.

[tex]Br_2(l)+2HCl(aq)\rightarrow Cl_2(g)+2HBr(aq)[/tex]: Complete.

We can ionize HCl and HBr as they are aqueous:

[tex]Br_2(l)+2H^+(aq)+2Cl^-(aq)\rightarrow Cl_2(g)+2H^+(aq)+2Br^-(aq)[/tex]: Ionic

Finally, we cancel out the hydrogen ions as the spectator ones:[tex]Br_2(l)+2Cl^-(aq)\rightarrow Cl_2(g)+2Br^-(aq)[/tex]

b.

[tex]3Co(IO_3)_2(s)+Fe_2(C_2O_4)_3(aq)\rightarrow 3CoC_2O_4(s)+2Fe(IO_3)_3(aq)[/tex]: Complete

We ionize the iron-containing species:

[tex]3Co(IO_3)_2(s)+2Fe^{3+}(aq)+3(C_2O_4)^{2-}(aq)\rightarrow 3CoC_2O_4(s)++2Fe^{3+}(aq)+6(IO_3)^-(aq)[/tex]

Finally, we cancel out the iron ions as the spectator ones:

[tex]3Co(IO_3)_2(s)+3(C_2O_4)^{2-}(aq)\rightarrow 3CoC_2O_4(s)+(aq)+6(IO_3)^-(aq)[/tex]

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Answer:

b

Explanation:

Haty

The energy required to break the bond in the reactants is activation energy .

Hence, option (A) is correct answer.

The chemical reaction which releases energy are known as exothermic reaction. Bond forming is exothermic process. Activation energy is needed to initiate the reaction. In exothermic reaction potential energy converted into kinetic energy.

The chemical reaction which absorbs heat from the surrounding is known as endothermic reaction. Bond breaking is endothermic reaction.  Activation energy is needed to initiate the reaction. In endothermic reaction kinetic energy converted into potential energy.

Thus, from the above conclusion we can say that The energy required to break the bond in the reactants is activation energy .

Hence, option (A) is correct answer.

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Answer:

sorry di ko alam

Explanation:

Answer:

0+3 anion

Explanation:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Answer:

what is the question

Explanation:

Answer:

4.97 X 10^13 ATOMS OF Zn

Explanation:

how many atoms of zinc are required to weigh 5.4 ng

a nano gram is 10^-9 grams

Zinc has an atomic mass of 65.39 gm/moles

there is an Avogadros number of atoms in a mole

65.39 GRAMS PER MOLE

65.39 g/(6.022 X 10^23)how many atoms of zinc are required to weigh 5.4 ng

 GRAMS PER ATOM

1.086 GRAMS PER  1O^22 ATOMS

1 atom of Zn weighs 1.086 X 10^9 X 1O^-22 n grm=

1,086 X 10^-13 n gm                              

Y tines 1.086 X 10^-13 = 5.4 n gm

Y = 5.4/ (1.086 X 10^-13) =

4.97 X 10^13 ATOMS OF Zn

CHECK

(4.97 X 10^13 ) X 65.39 gm/(6.022 X 10^23) =

5.397 X 10^-9 =

5.4 n g

Answer: NaF is ionic. NF3 is covalent. SiF4 is ionic. CaF2 is Ionic and  NH4F is also ionic. Ionic compounds transfer electrons whereas covalent compounds share electrons hence the word "co". Also, ionic compounds are formed with metal and nonmetal. Where a covalent is with 2 nonmetals. Only ionic compounds would produce fluoride in water because ionic compounds can dissolve in water and covalent compounds cant.

Answer:

The speed of light is constant and absolute and referenced to a vacuum.  The speed at which light itself travels through different mediums changes.

Light travels slower through denser mediums. It travels slower through the air than it does in a vacuum. Slower again through glass than air, or water than air or glass.

Answer:

Glossary: Electromagnetic wave. Definition: Electromagnetic radiation is generated by the vibration of electrons or other electrically charged particles

Explanation: