If the reaction produces 400.0 mL of 1.5 M MgCl2, how many moles of HCl reacted?
(A) 0.30 moles
(B) 0.60 moles
(c1.20 moles
(D) 2.40 moles

Answer:

9.36 grams NaOH needed

Explanation:

Given Rxn

(NH₄)₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2NH₃(g) + 2H₂O shows a molar reaction ratio of 1-mole (NH₄)₂SO₄ to 2-moles NaOH. If the 15.4 gram sample of (NH₄)₂SO₄ is converted to moles, then 2 times moles of ammonium sulfate will be the molar amount of NaOH needed to completely react. Complete computation by converting moles to grams NaOH; that is, multiply by formula wt. of NaOH (=40g/mol).

moles (NH₄)₂SO₄ = 15.4g/132.14g·mol⁻¹ = 0.117 mole (NH₄)₂SO₄.

moles NaOH = 2 x 0.117-mole = 0.234-mole NaOH needed.

∴grams NaOH needed = 0.234-mole NaOH x 40-g NaOH/mole NaOH = 9.36 grams NaOH needed. (3 sig. figs.)

Then multiply   0.117 mole by 2 => 0.234 mole NaOH needed to completely react with the 0.117 mole (NH₄)₂SO₄. Converting to mole to grams, multiply by formula wt. of NaOH => 0.117 mole x 40g/mole = 9.36 grams NaOH needed.

Answer:

CO2 should be 50.88 g

Explanation:

CH4 + 2 O2  -->  CO2 + 2 H2O

First, find the moles of CH4:

Molar Mass of CH4 (formular mass):

12+1*4=16 g/mol (actually just use the atomic mass in your periodic table to add them up)

Then we can find how many moles in CH4 = 18.5÷16=1.15625 mol

As we know 1 mole of methane(CH4) makes 1 mole of CO2, so if 1.15625 moles of methane is reacted, 1.15625 moles of CO2 will be made.

So the moles of CO2 is 1.15625 moles.

Calculate the mass of CO2:

Molecular mass: 12+16*2=44 g/mol

Mass=44*1.15625=50.88 g (cor. to 2 d.p.)

Answer:

the natural and man made thing which we can see around us is known as environment. not enviorement.

Answer:

Environment means anything that surrounds us. It can be living (biotic) or non-living (abiotic) things. It includes physical, chemical and other natural forces. ... In the environment there are different interactions between animals, plants, soil, water, and other living and non-living things.

Answer:

Extract DNA from the fertilizer to identify its origin.

Explanation:

Barnes find out that fertilizer was used in the explosive material. Barnes should now identify the origin of this type of fertilizer so that its root can be determined. When the origin is unable to be determined then Barnes should keep the traces of the fertilizer and try to identify the manufacturer.

Answer:

Track down where the fertilizer was sold and who bought it

Explanation:

I, myself, took this exam.

Answer:

0.0389757845886336

Explanation:

Answer: Q=104525J

Explanation: where Q is the heat energy required to heat a mass, m , though a change in temperature of Δ T and c is the heat capacity of the material (found in books!). Typical units are Q in Joules or J , m in k g and Δ T is in either Kelvin, K , or degrees Celsius o C . The units of c depend on the other units used but J / k g o C is typical.

Answer:

the same

Explanation:

due to the law of conservation of mass, the mass will not change

Answer: The mass will be the same it will not be able to change.

Explanation: due to the law of conservation of mass, the mass will not change telling us that the mass and the grams or whatever it was saying on there will stay exactly no change. so the 250 grams will not change.

Answer:

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.

Explanation:

g00gle worls

Answer:

There are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Explanation:

Because pH is a logarthmic scale, we can use the formula:

[

H

+

]

=

10

-pH

. Where...

=>

[

H

+

]

is the concentration of hydrogen ions in the solution.

=>

p

H

is the pH of the solution.

=> Where

10

is the base of the power - it's a logarithm formula.

We can now just sub in the values and solve for [

H

+

]

.

[

H

+

]

=

10

-pH

=

10

−

(

12.83

)

=

1.479108388

×

10

−

13

We can round (if required) to

1.479

×

10

−

13

.

Thus, there are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Hope this helps :)

Explanation:

Elements contained. C. H

% by mass. 10.6. 4.4

/ each by its a.m. 10.6/12.0. 4.4/1.0

amount. 0.88. 4.4

/ each by the smaller. 0.88/0.88. 4.4/0.88

ratio of amount. 1.00. 5.00

simplest whole number ratio= 1 : 5

The empirical formula=CH5

Answer:

24.47 L

Explanation:

Using the general gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = 0.0821 Latm/molK

T = temperature (K)

According to the provided information in this question,

P = 1.0 atm

V = ?

n = 1 mol

T = 25°C = 25 + 273 = 298K

Using PV = nRT

V = nRT ÷ P

V = 1 × 0.0821 × 298 ÷ 1

V = 24.465 ÷ 1

V = 24.465

V = 24.47 L

Answer:

Mercury chloride's(HgCI2) empirical formula is HgCI.

Explanation:

Answer:

Answer is C since activation energy is needed in a reaction

Potential energy is the energy present in the reactions. The potential energy of the reactant in the graph is more than that of the product. Thus, option A is accurate.

Potential energy is the energy of the reaction that results in the formation of products. The potential energy is reduced in the exothermic reactions as energy is released along with the products.

The bonds present in the reactants in the reaction mixture split in the presence of the activation energy to release energy and form the product.

Therefore, option A. the graph shows the greater potential energy of the reactant.

Learn more about potential energy here:

https://brainly.com/question/2292813

#SPJ2

Answer:

It's A because its almost like a personality its just a sexuallity / gender

Answer:

half of its genetic material from each parent.

Explanation:

When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.

Answer: An ion with fewer electrons than its neutral atom is called a(n) cation. The charge of an ion with more electrons than its neutral atom is. negative.Name an ionic compound by the cation followed by the anion. ... Covalent compounds are formed when two or more nonmetal atoms bond by sharing valence electrons. Valence electrons are the outermost electrons of an atom.

Explanation:

Answer: 1. 2 moles of oxygen atoms = 32 grams

2. 2 moles of oxygen molecules = 64 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.

1 mole of oxygen atom (O) weighs = 16 g

Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]

Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g

Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]

Answer:

it would be C average kinetic energy

Answer:

ionic bond

Explanation:

Explanation:

Answer:

D because it is in a fixed position

Answer: a. BaO

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here element barium is having an oxidation state of +2 called as [tex]Ba^{2+}[/tex] cation and [tex]O^{2-}[/tex] is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]BaO[/tex]

Explanation:

cells, dna, chromosomes, body systems

Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

The balanced chemical reaction is:

[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]  

According to stoichiometry :

2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]

Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex]  of [tex]H_2[/tex]

Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Answer: D

Explanation:

because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can

Answer:

C

Explanation:

Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.

Answer:

The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved.

This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed.

KE = 0.5 • m • v2

where m = mass of object

v = speed of object

That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.