fill in the blank. "A solution is prepared by dissolving calcium chloride in water and diluting to 500.0 mL. If this solution contains 44 ppm chloride ions, the concentration of calcium ions is __________ ppm.
a. 88
b. 44
c. 500
d. 11
e. 22"
"e. 22
1 ppm = 1mg solute/1L solution
44 ppm = x/.5 L solution (500 mL = .5L)
X mg = 22
22/.5 = 11
11 mg/.5 = 22mg Ca+"

The reaction is thermodynamically favored because it releases energy, which is indicated by the negative value of the change in enthalpy (∆H) of the reaction. This means that the products have a lower enthalpy than the reactants, making the reaction spontaneous and energetically favorable.

Additionally, the decrease in the disorder or randomness of the system (negative ∆S) is outweighed by the decrease in enthalpy, resulting in a negative change in Gibbs free energy (∆G) and indicating that the reaction will proceed in the forward direction.

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Answer:

cheese

Explanation:

the cheese would be the limiting factor if your sandwich needs to have  ONE of each of the ingredients..then you could only have 4 sandwiches  ....is there more info given?

   For instance if you need 5 pickles per sandwich, then you could only have 3 sandwiches and pickles would be the limiting reactant.

The distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.

The distance between two points is calculated using the following equation.

for a given points (x1, y1), (x2, y2), the distance, d is;

d = √[(x2-x1)² + (y2 - y1)²]

From the given question;

x1 = 8, y1 = -5

x2 = 1, y2 = 1

distance = √[(1-8)² + (1 - -5)²]

distance = √[(-7)² + (16)²]

distance = 9.22 units

Thus, the distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.

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Answer:

23percent

Explanation:

correct this or not?

Answer:

C: checking your email

Explanation:

I believe that C would be impossible, as you cannot use wireless networks without radio waves

Answer:

HCl (aq) + NaOH (aq) --> H2O (L) + NaCl (aq)

Explanation:

HCl is a strong acid while NaOH is a strong alkali. Hence both should dissociate completely in water and 1 mol of HCl will fully neutralise 1 mol of NaOH.

I'm assuming that Part 2 on molarity is part of a data based question that requires you to calculate the number of moles of NaOH based on the data provided and the equation that you are required to balance. Hence, I can't help you with it as I do not have the values.

We can plug them into the Henderson-Hasselbalch equation to calculate the pH 2.14

Ascorbic acid, also known as Vitamin C, is a naturally occurring water-soluble vitamin found in citrus fruits, green vegetables, and other fruits and vegetables. It is an essential nutrient for humans, playing an important role in the growth and repair of tissues, and helping to protect the body from free radicals and other environmental toxins.

Ka1 for H₂C₆H₆O₆ = 7.5 x 10⁻⁵
The initial concentration of H₂C₆H₆O₆ is 0.0942M.
We can calculate the pH of the solution by using the Henderson-Hasselbalch equation:
pH = pKa1 + log ([C₆H₆O₆²⁻] / [H₂C₆H₆O₆)
Since we don't know the concentrations of H₂C₆H₆O₆ and C₆H₆O₆²⁻, we can use the law of mass action to solve for them.
At equilibrium,
[H₂C₆H₆O₆] * [C₆H₆O₆²⁻] = Ka1 * [H₂C₆H₆O₆]²
[C₆H₆O₆²⁻] = Ka1 * [H₂C₆H₆O₆]
Substituting the initial concentration of H₂C₆H₆O₆:
[C₆H₆O₆²⁻] = (7.5 x 10⁻⁵) * (0.0942) = 7.08 x 10⁻⁶ M
Now that we have the concentrations of both species, we can plug them into the Henderson-Hasselbalch equation to calculate the pH:
pH = pKa1 + log ([C₆H₆O₆²⁻] / [H₂C₆H₆O₆])
pH = -log(7.5 x 10⁻⁵) + log (7.08 x 10⁻⁶ / 0.0942) = 2.14

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Using the Henderson-Hasselbalch equation the pH of the system is 2.14

The concentration of an acidic or basic species, the conjugate base or acid, and the pH of a solution are all connected by the Henderson-Hasselbalch equation.

We know that;

pH = pKa1 + log ([C₆H₆O₆²⁻] / [H₂C₆H₆O₆)

Then;

[H₂C₆H₆O₆] * [C₆H₆O₆²⁻] = Ka1 * [H₂C₆H₆O₆]²

[C₆H₆O₆²⁻] = Ka1 * [H₂C₆H₆O₆]

Therefore;

[C₆H₆O₆²⁻] = (7.5 x 10⁻⁵) * (0.0942) = 7.08 x 10⁻⁶ M

And we have that;

pH = -log(7.5 x 10⁻⁵) + log (7.08 x 10⁻⁶ / 0.0942)

pH = 2.14

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Answer:

they can bond together to form very long, durable chains that can have branches or rings of various sizes and often contain thousands of carbon atoms. Silicon and a few other elements can form similar chains; but they are generally shorter, and much less durable.

Explanation:

Scope 1 emission covers direct emissions from owned or controlled sources. Scope 2 emission covers indirect emissions consumed by the reporting company. Scope 3 emission includes all other indirect emissions that occur in a company’s value chain.

The scopes of emission relates who owns those emissions and the level of control applicable to changing those emission levels at each stage. Scope 1 and 2 emissions are a mandatory part of reporting for many organizations across the world and relate to systems that are within reasonable control of an entity such as onsite and purchased energy. Scope 3 emissions are centered on sources of emissions that are more external to a specific organization such as those across the supply chain. This explains the scopes of emission.

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Answer:

Essentially, scope 1 and 2 are those emissions that are owned or controlled by a company, whereas scope 3 emissions are a consequence of the activities of the company but occur from sources not owned or controlled by it.

Explanation:

Hope this helps

Answer:

A conversion factor is a variable that transforms the dimension of one variable into the terms of another variable.

Explanation:

Let be \(x\) and \(y\) two variables with diferent dimensions (units), \(r\) is a conversion if transforms the dimension of one variable into the terms of the other variable. That is:

\(y = r\cdot x\) (1)

Where:

\(x\) - Input, [input unit]

\(y\) - Output, [output unit]

\(r\) - Conversion factor, [output unit] per [input unit]

A chemical reaction is when reactants are converted into another substance (also called products). Their reaction rearranges the constituent atoms of the reactants to give different substances as products.

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Have a wonderful day!

The mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

Iron ores refers to minerals in which iron occur in combined form found in the earth's crust.

Some ores of iron include:

Molar mass of hematite, Fe₂O₃ = 160 g/mol

Molar mass iron = 56 g/mol

Percent mass of iron in hematite = 56/160 = 35%

The mass of hematite that contains 8.0×10³ kg of iron = 8.0 × 10³kg/0.35 = 2.29 × 10⁴ kg.

Therefore, the mass of hematite that contains 8.0×10³ kg of iron is 2.29 × 10⁴ kg.

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On a Space shuttle, LiOH Is used to absorb CO2 to produce LiHCO3

LiOH + CO2 === LiHCO3

Now

58g of CO2 produces 79.3g of LiHCO3

This is the Actual Yield.

Recall

% Yield = Actual yield/Theoretical yield x100

NOW

We have to find the theoretical yield

From the equation of reaction

Now 58g of CO2 reacted

Converting to Moles

mole = Mass/Molar Mass

Molar mass of CO2=44g/mol

Mole = 58/44

=1.318moles of CO2

From the equation Of Reaction.

1 mole of CO2 reacts and Produces 1 mole of LiHCO3

Since their Mole ratio is 1:1

An Equal amount of LiHCO3 will be produced.

So 1.318moles of LiHCO3 will be produced.

Convert this mole to Mass

Mole =Mass/Molar Mass

Mass = Mole x Molar Mas

Molar Mass of LiHCO3 =68g/mol

Mass = 1.318 x 68

Mass = 89.62g.

This is the theoretical Yield.

% yield = 79.3/89.62 x 100

= 88.48%.

Answer:

A. AgNO3

I hope it's helps

Answer:

The killers who choose poison for killing the victim are the one who does not want to confront the victim. When a knife or a bullet is used to kill a person he may struggle and can cause harm to killer also.  

Explanation:

Poison is the most easiest way to kill a person without any struggle. The poison can be given to a person in a juice or through an injection. The poison entered in the body of victim will cause his heart to cease gradually and he will not have energy to struggle with the killer to save his life.

An astronomical unit is the average distance between the sun and Earth reactant, which is approximately 93 million miles.

Correct option is, B. The planet is farther from the Sun than Earth.

As per the given scenario, the planet's astronomical unit is 1.5. Therefore, the planet is 1.5 times the distance between the sun and Earth. Now, we need to compare this planet to Earth. According to the answer options given, the planet's distance from the sun must be considered since the question asks us to compare the planet with an astronomical unit of 1.5 to Earth.

The planet is farther from the Sun than Earth. To summarize, since the planet is farther away from the sun than Earth, it is less likely to support life as it receives less solar energy, resulting in lower temperatures. The further the planet is from the sun, the longer it takes for it to complete one revolution, resulting in a longer year.

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Answer:

but iron is 2 and 3 by its valance how could it be possible

Answer:

5.96 g/cm^3

Explanation:

Corner atom = 1/8

Atoms in center = 1

Atoms in face of the cube= 1/2  

Molar mass of V = 50.94 g/mol (from period table)

1 mole = 6.02x10^23

In BCC unit cell:

(8 x 1/8)+ 1=2 per 1 unit cell

Mass: 2(50.94g)/6.02x10^23 = 1.69x10^-22 g/unit cell

305pm=(305x10^-12m÷10^-2m) x (1mL÷1cm^3)

           = 2.837 x 10^-23 mL

1pm=10^-12m

1cm=10^-2m

1mL=1cm^3

density=mass/volume

density of V = 1.69x10^-22g÷2.837x10^-23mL

                    =5.957g/mL

                    =5.96g/cm^3

When trans-2-butene (CH3-CH=CH-CH3) reacts with Br2 in H2O, the following reaction takes place:CH3-CH=CH-CH3 + Br2 → CH3-CH(Br)-CH(Br)-CH3Since trans-2-butene has two carbon-carbon double bonds, there are two stereoisomers possible for the product.

These stereoisomers are known as the meso compound and the racemic mixture.The meso compound has a plane of symmetry, which means that it is optically inactive. The racemic mixture is a mixture of two enantiomers, which means that it is optically active.Therefore, including stereoisomers, there are two products obtained when trans-2-butene reacts with Br2 in H2O: the meso compound and the racemic mixture.When trans-2-butene reacts with Br2 in H2O, it undergoes an addition reaction.

The product obtained depends on the stereochemistry of the starting material. Since trans-2-butene is a geometric isomer, there are two possible stereoisomers that can react with Br2: cis-2,3-dibromobutane and trans-2,3-dibromobutane. Therefore, two products are obtained when trans-2-butene reacts with Br2 in H2O.

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Answer:

A Transverse Wave

The volume of the 7.50 m potassium carbonate solution with 49.0 kg of potassium carbonate dissolved in it is 47270 ml.

To calculate the volume in ml of a 7.50 m potassium carbonate solution with 49.0 kg of potassium carbonate dissolved in the solution, we will use the formula Molarity = (moles of solute) / (liters of solution).

First, we need to calculate the moles of potassium carbonate in the solution. To do this, we will use the molar mass of potassium carbonate, which is 138.21 g/mol.

Moles of potassium carbonate = (49.0 kg) / (138.21 g/mol) = 354.54 mol

Next, we will rearrange the formula for molarity to solve for liters of solution:

Liters of solution = (moles of solute) / (Molarity) = (354.54 mol) / (7.50 m) = 47.27 L

Finally, we will convert the liters of solution to milliliters:

Volume in ml = (47.27 L) * (1000 ml/L) = 47270 ml

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Answer:

c

Explanation:

the rest are chemical properties

Answer: A physical trait is a defining aspect or feature of your body or other subject that you can see visually.

Explanation:

The periodic table brings order to information about the chemical elements. The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties.

Answer:

The answer is lemonade.

Weaker acids are those which tend to have a higher pH from 4 to at least 6 stronger acids have low pH from 2 and below that's from 2 to 0.

Hope this helps

Hope

Answer:

If there is a change in the natural shape of the intestines, this can be known as a twisted bowel. A twist in the small intestine is referred to as a volvulus. Twists in the large intestine are known as a colonic volvulus. These abnormal twists or loops can cause an obstruction or other medical conditions which could be fatal. If signs of twisting bowel present, it is important to seek medical attention as quickly as possible.

The correct form of the second-order integrated rate law for one reactant is 1[A]t - 1[A]0 = kt.

The second-order integrated rate law relates the concentration of a reactant to time for a second-order reaction. The correct equation for the second-order integrated rate law for one reactant ([A]) is:

1/[A]t - 1/[A]0 = kt

Here, [A]t and [A]0 represent the reactant concentration at time t and initial time (0), respectively. k is the rate constant.

Option (a) represents the first-order integrated rate law, and option (b) is incorrect because the rate law should have a subtraction between the terms rather than a multiplication. Therefore, option (c) is the correct choice for the second-order integrated rate law for one reactant.

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In order to demonstrate that intramolecular forces are stronger than intermolecular forces, a block of ice will be heated in a sealed container until it turns into steam.

Because the forces holding together compounds are stronger than the forces holding together molecules, intramolecular forces are stronger than intermolecular forces.

Intermolecular forces exist between molecules, but intramolecular forces exist between atoms within a molecule. This is the primary distinction between intermolecular and intramolecular forces.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

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