The molecule below contains both an aldehyde and a ketone functional group. Circle only the carbonyl carbon atom of the aldehyde functional group.

The molarity of a solution is the molar concentration of it.

It is calculated by:

Where n is the number of moles of the substance in the solution and V is the total volume of the solution.

The volume was given:

And the number of moles we can calculate using the given mass and the molar mass:

So:

Thus, the molarity is approximately 386 mol/L.

The but-2-ene is a molecule with four carbons and the middle bond, (the second one) is a double-bond.

So, its structure is H₃C-CH=CH-CH₃.

However, the double bond makes two possible isomers, the "e" and "z":

The double bond, differently from the single bond, does not rotate, so these structures are not the same.

In the left one, the carbon groups have higher priority, and they are in alternating sides, bottom and top, and so it is called the E isomer.

In the right one, the carbon groups are on the same side, so it is called the Z isomer.

Step 1

The reaction provided:

2 NaN3 (s) ⇨ 2 Na (s) + 3 N2 (g) (completed and balanced)

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Step 2

Information provided:

100.0 g NaN3 decomposes

-----

Information needed:

The molar masses of:

NaN3) 65.00 g/mol

N2) 28.00

(please, the periodic table is useful here)

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Step 3

Procedure

By stoichiometry,

2 NaN3 (s) ⇨ 2 Na (s) + 3 N2 (g)

2 x 65.00 g NaN3 ----------------- 3 x 28.00 g N2

100.0 g NaN3 ----------------- X

X = 100.0 g NaN3 x 3 x 28.00 g N2/2 x 65.00 g NaN3

X = 64.62 g

Answer: 64.62 g of N2 produced

We are given a speed of 1.02 mm/hr and we have to convert that speed into inches/day. To find the answer to our problem we can use a 2 steps conversion. First we can convert mm into inches and then the hr into days.

We know that there are 25.4 mm in 1 inch. So let's convert it.

25.4 mm = 1 inch

Speed = 1.02 mm/hr * 1 inch / (25.4 mm) = 0.04016 inch/hr

Speed = 0.04016 inch/hr

Then we know that there are 24 hours in 1 day.

24 hrs = 1 day

Speed = 0.04016 inch/hr * 24 hr/(1 day) = 0.964 inch/day

Speed = 0.964 inch/day

The speed of a slime mold in inches per day is 0.964.

+828kJ

Given the following chemical reaction with their heat of reactions

In order to arrive at the resulting reaction, we will carry out the followiing transformation;

• Swap the reactant with product, of equation 1 and;

• Multiply equation 2 by 3, to have;

Cancel out the Oxygen element in both equation and add to have;

Hence the enthalpy change of the reaction to 3sf is +828kJ

Step 1: Identify the given and do necessary conversions.

• 27.mol of copper ,

we know that 1 = 1*10^-6 mole ,

So, 27.mol*1*10^-6 = 27*10 ^-6 mole of copper.

• Volume of the solution = 300ml ,

300ml/1000ml = 0.3L

Step 2: Calculate the concentration in mol/L

Molarity( M /mole/L) = moles of the solute / volume

=27*10 ^-6 mole/ 0.3 L

=0.00009mol/L

• Therefore ,Concentraion of copper(II) sulfate =9.0x10^-5mol/L

( 2 significant digits)

Answer:

D

Explanation:

as a transition metal, when put in dilute hydrochloric acid it will bubble vigorously and produce hydrogen gas

answer and explanation

the sum of pH and pOH is always equal too 14

and so if we apply that principle we have the following

pOH + pH = 14

and we are told that the pH is 0.0059 so we substitute this in the equation

pOH +0.0059 = 14

pOH = 14 - 0.0059

pOH = 13.99

Explanation

Let us first define the different types of reaction.

A combination reaction is one in which two reactants combine to form a single product.

A decomposition reaction will be one in which a reactant breaks down into two or more products.

A simple displacement reaction will be one in which a reagent, which is in its natural state, displaces one element bound to another. As a product, we will have the previously linked element now in its free form.

In a double displacement reaction two linked elements move past each other and take each other's place.

Answer:

Smaller grid spacing closes the gap on observations in time and space, resulting in higher resolution model output that is more accurate and reliable.

1) Solute. A solute is a substance that dissolves when put into another substance (the solvent).

NaCl dissolves when placed into water. So, NaCl is the solute.

The mass of the solute is 25.0 g.

.

STEP-BY-STEP EXPLANATION

What to find? The electronic configuration of tin ion

Tin is an element with an atomic number of 50.

NB: Atomic number = number of proton

Hence, the number of proton of tin = 50

The above tin ion means it has lost two electrons, which make it has a total electron of 48

To write the electronic configuration of tin ion, we will be using the SPDF Notation

spdf are names given to orbitals that hold electrons in atoms.

s - orbital

p- orbital

d- orbital

f -orbital

29,769.95g of carbon dioxide can be removed.

1st) It is necessary to write the balanced chemical reaction:

According to the balanced equation, 1 mole of carbon dioxide (CO2) can be removed by producing 1 mole of lithium carbonate (Li2CO3).

Using the molar mass of carbon dioxide and lithium carbonate we can convert moles into grams:

- CO2 molar mass: 44 g/mol

- Li2CO3 molar mass: 73.9 g/mol

With the molar mass we can see that 44g of carbon dioxide (1 mole) can be removed by producing 73.9 g of lithium carbonate.

2nd) Now we can calculate the amount of carbon dioxide that can be removed from the breathing environment if the scrubber reaction produces 50.0 Kg of Li2CO3, using a mathematical rule of three:

Here, it is important to convert the grams of Li2CO3 to kg before doing the calculus.

So, 29,769.95g (29.8kg) of carbon dioxide can be removed.

The skeletal structure of an organic compound is an abbreviated representation of its molecular structure, they are quick and easy to draw.

For example, the following image shows the skeletal structure of a compound:

The peaks represent the carbons. We must remember that carbon can have a maximum of 4 bonds.

Now, I will show you how is the structure of this specific compound:

This is ternary alcohol, called 2-methyl-2-butanol. If you see carefully, you will notice that each carbon has 4 bonds. The functional groups present will be OH. The skeletal structure will be:

First, it is the chemical energy because of the batteries, then this energy is transforming to electrical because of the flowing of electrons. Before this, the electrical energy is going to be light energy for the light bulb and finally, we have the heat energy of the light bulb. The order is:

The two compounds that react are:

Potassium iodide: KI

Lead (II):

When the two solutions are mixed the following reaction takes place:

The resulting product is called lead (II) Iodide.

Answer:

There are a lot of properties of ionic compounds to explain.

The most characteristic ones are:

- High melting points

- Hard and brittle

- Electrical conductivity

All of these can be explained by the forces in ionic compounds.

The forces that maintain the ions together are electrostatic forces, which come from the charged ions with opposite signs.

Electrostatic forces are very strong, so and in ions this occur in a crystal lattice, so we need a lot of energy to break this attraction. Because of that, we need a high temperature to make it has enough energy to break this attraction and melt.

This strong attraction also makes the ionic compounds hard to break, because we will need a lot of force to break the ions appart. However, once enough force is applied, its lattice structure is shifted and ions with same charge becomes close to each other, making a repulsive force that breaks them appart, giving them the brittle property.

An electrical conductivity happens when there are free charges in a system. The ionic compounds are composed by charged particles, so if they are free to move, they will conduct electricity. So, when the compound is melted of dissolved, the charged ions, that once were together by the electrostatic force, now can conduct electricity.I have finished answering the question.

Answer:

The [H3O+] is 1.58x10-12 M.

Explanation:

To calculate the [H3O+] from the pH, we can use the pH formula and replace the value of pH:

So, the [H3O+] is 1.58x10-12 M.

Answer: the percent yield of the reaction is 30.7%

Explanation:

The question requires us to determine the percent yield of the reaction that produces copper(I) sulfide, given the theoretical yield and actual yield.

The following information was provided by the question:

Amount of Cu used = 0.0970 mol of Cu

Actual yield of reaction = 2.37 g of Cu2S

To solve this problem, we'll need to determine the theoretical yield of the reaction, considering the amount of copper (Cu) used and the balanced chemical equation for this reaction, and then calculate the percent yield of the reaction.

1) Determining the theoretical yield of reaction:

The reaction between copper and sulfur to produce copper (II) sulfide can be written as:

Considering that 0.0970 moles of Cu were used in excess of S, and the stoichiometry of the reaction, we can calculate the amount of Cu2S produced:

2 mol Cu ---------------------- 1 mol Cu2S

0.0970 mol Cu ------------ x

Solving for x, we have that 0.0485 moles of Cu2S should be obtained from the reaction.

2) Calculating the percent yield of the reaction:

The percent yield of a chemical reaction can be calculated using the following equation:

Note that the theoretical and actual yield values must be used in the same units. Thus, we need to convert the mass given for actual yield (2.37g) to number of moles, considering the molar mass of copper (I) sulfide (159.16 g/mol):

Therefore, the actual yield corresponds to 0.0149 moles of Cu2S.

Now, we can calculate the percent yield of the reaction:

Therefore, the percent yield of the reaction is 30.7%.

The ice pack gets colder when the inside barrier is broken and the chemicals mix together as instant cold packs employ this type of endothermic reaction.

To learn more about endothermic reaction visit:

brainly.com/question/23184814

#SPJ9

Chemistry =>Chemical Reactions => Balancing equations

We have the oxidation of iron in the equation.

To balance the equation we must start by counting the atoms of each element on both sides of the reaction.

We will balance the oxygen. We have 2 atoms of oxygen on the reactants. So we write coefficient 2 on the FeO molecule.

Now, we balance the iron. We have 2 Fe atoms, so we write the coefficient 2 on the Fe molecule. We have:

Now, the equation of the reaction is balanced.

Answer: 2Fe + O2 →2FeO

Characteristics of nonmetals

1. What characterizes non-metals is that they lack the ability to conduct electricity, therefore they are poor conductors, unlike metals.

2. Non-metallic compounds in general are the basis for forming organic compounds essential for life.

3. Non-metal elements do not reflect light, are non-corrosive and are brittle, and break easily.

4. They also have high electronegativity, so when they form an ionic bond they tend to take electrons.

To solve this problem, we could use the ICE table as follows:

First of all, the reaction that we're working with is:

Now, let's make the table:

As you can notice, the initial concentration of C6H5CO2H is 0.536002M, and as the products haven't been formed yet, their concentration is 0.

When the change happen, the concentration of the reactant will decay "x" and the concentration of the products will increase "x". (That's the reason of the signs).

And finally, the equilibrium.

We also know that:

And, this equilibrium constant comes from the following:

Where all concentrations are the equilibrium concentrations.

If we replace, we got that:

We're going to solve this equation for x:

And, using the quadratic formula we obtain that the value of x is 0.000587014 approximately.

Now, if x=0.000587014, that means that [H+] = 0.000587014

And finally, remember that the pH of a solution is defined as:

Therefore, the pH is 3.23.

Given Data

mass of solute Na 10.0 g

mass of solvent 1000.0g water

to calculate:

molality of solution

molalilty is defined as the mols of a solute divided by the Kg of the solvent

therefore mols of Na = mass/ molar mass

= 10.0g/22.98g/mol

= 0.44 mols

1 Kg = 10000. grams

Therefore molality of solution

= 0.44 mols/ 1 Kg

= 0.44 mols/Kg

Question

Research: Find 4 strategies that are used to prevent rusting of car parts and/or water pipes? Briefly explain how they work in your own words. What are some pros and cons of these methods?

Answer

Method 1: Applying Oil - Coating materials with oil will help to prevent rust or slow its formation since it prevents moisture from reaching the iron, which can get oxidized.

Pros: It can be applied easily to most materials and it's of relatively low cost

Cons: Some materials can't be covered with oil because they can interfere with the process they are designed for. Example: Food transport machinery

Method 2: Paint the metal - Similarly to the oil a good amount of paint can cover the metallic parts and prevent moisture from the air to get in direct contact with the iron.

Pros: It is easy to apply paint to most metals.

Cons: Contrarily to oil, paint can be more expensive depending on the application.

Method 3: Galvanization - is the process of applying a protective zinc coating to iron or steel materials to prevent or slow the rusting processes.

Pros: The galvanization process makes steel highly durable and the material usually becomes scratch free.

Cons: Steel structures that are either too big or too small are unsuitable for the galvanization process.

Method 4: Store in a controlled environment - Metals corrode easily when exposed to environments with high humidity. To preserve a metal in good condition, it should be stored in environments with low humidity content and not in contact with salts or acids.

Pros: It does not alter the properties of the equipment.

Cons: Not all metal objects can be stored in environments containing low humidity.

4

beacause it is4 is teta and 7 is hepta

Answer

225.5 mol O₂

Procedure

Assuming the complete combustion of heptane, we will consider the following reaction for our calculations.

C₇H₁₆ + 11 O₂ → 7 CO₂ + 8 H₂O

The moles of oxygen can be determined by stoichiometry

A real-world example that can demonstrate the relationship between the variables temperature and volume is, for example, when we inflate a balloon for a party.

- First, we fill the ballon with a gas (air).

- Second, if we tie the balloon and heat it with some source of heat, we will see that the ballon begins to increase in volume.

So, as we increase the temperature of the gas inside the ballon, the balloon increases in volume.

This happens because temperature and volume are variables directly proportional through the Ideal Gas Law, whose formula is:

In the formula:

P is the pressure of the gas.

V is the volume of the gas.

n is the number of moles.

R is the constant of the gases.

T is the temperature of the gas.

Answer:

Explanation:

Here, we want to get the pH of the given molecule

Firstly,we write the ionization equation so as to get the number of hydrogen atoms from its dissociation

We have this as:

The Pka value for formic acid is 3.75

We have it that:

Using the ICE equation for the equilibrium constant,we have it that:

Thus, we have:

Since x is very small as opposed to tthe initial acid concentration, we approximate x as 0 below

Thus,we have:

Finally, we know that the pH is the negative logarithm to base 10 of the concentration of hydroxonium ion