Hello, anyone? help me

Answer:

1.32m es la concentración de NaCl en el agua de mar

Explanation:

La disminución de presión de vapor sigue la ecuación:

P = XP⁰

Donde P es la presión de la solución = 23.99mmHg

X es la fracción molar del solvente

P⁰ la presión del agua pura = 24.56mmhg

23.99mmHg = X*24.56mmhg

0.97679 = X

La fracción molar del solvente se define como:

Moles Solvente / (Moles soluto + Moles solvente)

Asumiendo que las moles de soluto = NaCl = 1:

0.97679 = Moles solvente / (1 + Moles solvente)

0.97679 + 0.97679 Moles solvente = Moles solvente

0.97679 = 0.02321 moles solvente

42 moles solvente = 42 moles de agua.

masa de agua:

42 moles * (18.01g / mol) =758g de agua = 0.758kg

Molalidad, m, son las moles de soluto (1mol NaCl) por kg de solvente (0.758kg):

1mol / 0.758kg =

Answer:

electric is your answer :)

Explanation:

Edge STEM instruction/assignment perhaps???

Answer:

A. C (alternate current)

Answer:

Explanation:

THE BEST ANSWER IS CCC

Hydrocarbon combustion refers to the chemical reaction where a hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.

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[tex]{\green{\dashrightarrow}}[/tex]Self-heating cans work through an exothermic chemical reaction between two chemicals. Popular combinations are aluminum and silica, calcium oxide and water, and copper sulfate and zinc. When the two substances combine, the reaction produces enough heat to raise the temperature of the can.

Answer: 30 g LiF

Explanation:

Answer:

Some chemical reactions will not generate products is because the molecules in a chemical reaction aren´t able to line up with each other correctly.

Explanation:

Answer:

The reason that a chemical reaction doesn't happen is that the molecules weren't able to line up with each other correctly. It's the same as you extending your right hand and your friend extending his right hand at the same time.

Explanation:

Answer:

The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. ... That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.

Answer:

to get used to them

Explanation:

you have to practice them so that they can get into your head

Sulphur Trioxide = So3

Sodium Hydroxide = NaoH

Answer:

[tex]\huge\boxed{Sulfur \ Trioxide\hookleftarrow}[/tex]

[tex]\huge\boxed{Sodium \ Hydroxide\hookleftarrow}[/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

# ꧁❣ RainbowSalt2²2² ࿐

Answer:

(C15H15N)

Explanation:

Answer:

molecules gain energ and start to move quickly

Water has highest density at 4∘C. This changes its properties from other simple fluids. When water is heated from 0∘C to 4∘C, the volume of liquid decreases. Thus for this transition, P ΔV is negative.

Answer:

5.90g of NaClO are needed

Explanation:

Assuming the weak acid is HClO pKa = 7.54

To solve this question we must use the H-H equation for acids:

pH = pKa + log [A-] / [HA]

Where pH is the pH we want = 7.74

pKa is pKa of the weak acid = 7.54

[A-] could be taken as the moles of the conjugate base (Moles NaClO) and [HA] moles weak acid = 0.500L * (0.10mol/L) = 0.0500 moles HClO

Replacing:

7.74 = 7.54 + log [NaClO] / [0.0500 moles]

0.20 = log [NaClO] / [0.0500 moles]

1.5849 = [NaClO] / [0.0500 moles]

Moles NaClO = 0.0792 moles

The mass is: -Molar mass NaClO = 74.44g/mol-

0.0792 moles * (74.44g / 1mol) =

5.90g of NaClO mass of the sodium salt of the conjugate base are need to make the buffer with a pH of 7.74.

pH tells the solution is acidic or basic. pH means potential hydrogen.

Given,

Assuming the weak acid is (hypochlorous acid) HClO

pKa = 7.54

[tex]pH = pKa + \dfrac{ log[A-] }{ [HA]}[/tex]

(Moles NaClO) and [HA] moles weak acid = 0.500L * (0.10mol/L) = 0.0500 moles HClO

Putting the value

[tex]7.74 = 7.54 + \dfrac{ log[NaClO] }{ [0.0500 moles]}\\0.20 =\dfrac{ log}{[0.0500 moles]} \\1.5849 =\dfrac{ [NaClO]}{Moles\;of\; NaClO } = 0.0792 moles[/tex]

The mass is

Molar mass NaClO

= 74.44g/mol - 0.0792 moles * (74.44g / 1mol)

=5.90g of NaClO are needed

Thus, 5.90g of NaClO are needed.

Learn more about pH, here:

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Answer:

Chemical Potential Ener

Answer:

The carbons on either side of the double bond are pointed in the same direction

Answer:

Explanation:

Heterozygous cross with a hom.ozygous recessive yields the following results

50% rr (hom.ogyzous recessive)

50% Rr (heterozygous dominant)

A heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).

Crossing over is a type of cellular process which occurs during the process of meiosis when chromosomes of the same type line up. When these two chromosomes – one from the mother and one from the father – line up, parts of the chromosome can be switched. Two chromosomes contain the same genes, but the genes may have different forms.

The organisms in this initial hybridization are called the parental or P generation. The progeny of the Rr x rr cross are called F1 generation which will have a heterozygous cross with the homozygous recessive giving the following results: 50% Rr (homozygous recessive) and 50% rr (heterozygous dominant)

A cross between two of the offspring in F1 generation would produce a new set of progeny called second filial generation (or F2 generation).

Thus, a heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).

Learn more about Parental crossing, here:

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Answer:

Na0H

Ca(OH)2

NH40H

Are the answers

Answer:

Cellular respiration uses oxygen in addition to glucose. It releases carbon dioxide and water as waste products. Cellular respiration actually "burns" glucose for energy.

Explanation:

Answer:

CuCl2 + 2NaNO3 → Cu(NO3)2 + 2NaCl

Explanation:

m(NaCl) =m(CuCI2) × 2Mr(NaCl) / Mr(CuCI2)

= 15 × 2 × (94/135)

=20.89 g

Answer:

D

Explanation:

The answer is D...and if you need explanation you can comment

Answer:

The molecule is a branched hydrocarbon.

Explanation:

The methyl prefix indicate the presence of a single carbon or the molecule is a branched hydrocarbon.

The Prefix is used to show or indicate the substituents, side chains of the molecule and prefix attached to the beginning of a word and the molecules name is based on the number of carbon atoms in IUPAC nomenclature.  The International Union of Pure and Applied Chemistry (IUPAC).

For Example:

Number of carbon Atoms          Root Name                  Prefix (side group)

1                                                    meth-                             methyl-

2                                                   eth-                                ethyl-

3                                                   prop-                              propyl-

4                                                   but-                                 butyl-

5                                                   pent-                               pentyl-

6                                                   hex-                                 hexyl-

7                                                   hept-                                heptyl-

Thus, we can say that prefix tells us the number of carbon atoms in each molecule. A presence of single carbon is indicated by the methyl prefix or we can also say that the molecule is branched hydrocarbon.

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Answer:

The common product is H2CO3

Explanation:

Complete question

Which products are the same in both the copper carbonate and the calcium carbonate if they react with hydrochloric acid in different reactions?

Solution

Reaction of  copper carbonate and hydrochloric acid  is as follows

CuCO3 + 2 HCl --> CuCl2 + H2CO3

Reaction of  calcium carbonate and hydrochloric acid  is as follows

CaCO3 + 2HCl --> CaCl2 + H2CO3

The common product is H2CO3

Answer:

The iupac name of CH3-O-CH2-CH2-CH3 is Methoxybutane.

Answer:

it's eveporates remains unused products

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Catalyst are substance that are added to a reaction in order to speed of the reaction.

And they remain the same before and after the reaction, hence the correct option is :

B. It remains unused.

__________________________

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Answer:

true

Explanation:

Answer:

Igneous or sedimentary rocks.

Explanation:

The presence of metamorphic rock is most likely evidence of that the rock formed from igneous or sedimentary rocks. The igneous rock converted into metamorphic rocks when the rock experience intense heat and pressure within the Earth's crust. These metamorphic rocks are crystalline and often have a “squashed” texture. So due to high temperature and pressure, the metamorphic rock is formed from igneous rock.

Answer:

b the same like this page provide the best way to go with it the hell are nutrients to

Explanation:

bush administration of jute bags and purses and then a good day to day basis and then we will have the same IP Android app and wanted to let you know that I am a

Answer:

5

Explanation:

mark me brainliest!

Answer:

Double bonds. It says I have to write more words lol but yeah it's double bonds