can someone please help? :(

Answer:

Explanation:

Here, we want to write the equilibrium constant expression

Generally, to write this, we exclude non-gaseous molecules

We simply put divide the concentration of the products (in square brackets) raised to the number of moles divided by that of the reactants raised to the number of moles too

For the given equation, we have the expression as:

A  polymer of monosaccharides linked by glycosidic bonds is known as a polysaccharide.

We know that there are different kinds of sugars that we have. This would depend on the way that the atoms of the sugar are joined together. The various kinds of sugars are found to be;

Monosaccharides: These are composed of simple sugar units

Disaccharides: These are composed of two sugar units that are joined together.

Polysaccharides : These are composed of more than two sugar units that are joined together.

Now we have to note that in talking about poly saccharides the idea that they are sugars that are composed of many units have to be at the back of our minds in the discussion. The many units have to be joined by a kind of bond that is called the  glycosidic bonds

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2.12 × 10²⁵ number of molecules are present in 7. 05 moles of pyridine.

Pyridine- A nitrogen atom has been added in lieu of one of the -CH groups in the benzene core to create pyridine, an azaarene. It belongs to the family of compounds known as pyridines. It plays a part in contaminating the environment. It is an organic heteromonocyclic mancude parent, an azaarene, a monocyclic heteroarene, and a member of the pyridine family.

Avogadro's number, which is equal to 6.02214076 × 10²³, is the quantity of units in one mole of any material (defined as its molecular weight in grams). Depending on the substance and the nature of the reaction, the units may be electrons, atoms, ions, or molecules (if any)

Given that there are 7.05 moles of pyridine,

The C₅H₅N has a molar mass of 79 g/mol.

One pyridine molecule contains five carbon atoms.

The number of molecules in one mole of pyridine is 5×6.022 10²³.

The number of molecules in 7.05 moles of pyridine are therefore equal to 7.05 × 5 × 6.022 10²³.

⇒ 2.12 × 10²⁵ number of molecules.

Hence, 2.12 × 10²⁵ number of molecules are present in 7. 05 moles of pyridine.

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The complete combustion of octyne has the form of the following equation:

To balance the equation, we need to count the atoms of each element before and after the reaction occurs. If this number is the same for each type of atom, the reaction is balanced.

Let's start counting:

As you can see, the reaction is not balanced. To balance, we could change the coefficients of each compound in order to count again a lot of times. Doing this, the balanced reaction would be:

The coefficient in front of O2 when the reaction is properly balanced is 23.

Tools, testing equipment, and personal protective equipment need to be regularly inspected and are tested, and PCBU needs to have procedures in place to make sure of this.

Before each use, all the instruments, testing apparatus, and PPE should be visually inspected for signs of damage. To make sure that equipment, such as tools, PPE, rubber mats, and LV rescue kits, are in good working order before usage, PCBUs should have "pre-start" visual inspection processes in place. Before usage, testing equipment needs to be checked out for damage to the insulated leads and probes and verified to be functional. To make sure it offers the necessary level of protection, testing equipment should be examined on a regular basis. The following variables will affect testing intervals: the frequency of the use, the setting, and the manufacturer's recommendations

With this requirement, both workers performing work and the finished work are guaranteed to be electrically safe.

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To determine the moles of a compound from the mass in grams, we must use the molecular mass. The molecular mass is calculated by adding the atomic weights of the elements multiplied by the atoms of the element present in the molecule. To make it easier we can make the following table:

We have that the molar mass of CHCl3 is: 119.377g/mol.

The number of moles will be:

In 16.0g pf CHCl3 there are 0.134 moles

In the reaction H₂ + I₂ --> 2HI, the hydrogen undergoes oxidation.

The balanced given chemical reaction is :

H₂ + I₂ --> 2HI

The oxidation state of Hydrogen is increased from 0 to +1 and the increase in oxidation number is called as oxidation. The loss of electrons is called as oxidation.

The oxidation state of iodine is decreased from 0 to -1 and the decrease in the oxidation state is called as the reduction. The gain of electrons is called as the reduction.

oxidation = Hydrogen , Reducing agent = hydrogen

reduction = Iodine , oxidizing agent = Iodine

Thus, In the reaction H₂ + I₂ --> 2HI, the Hydrogen undergoes oxidation.

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Answer:

I think C

Explanation:

don't forget to follow rate like

Answer:

exaggerate

Explanation:

There are many possible verbs for this.  I suggest exaggerate, but one many also consider:

"make a false claim"

"misrepresent"

Answer:

A b/c aluminum

Explanation:

don't forget to follow rate like

Answer:

carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

Explanation:

Answer:

Light Distribution and Brightness.

Conservation of Energy.

The Appearance of the Space and Luminaires.

Glare.

The Appearance of Color.

Lighting Control and Flexibility.

Lighting of Faces.

Cost of Implementation.

Explanation:

Hyperconjugation makes the alkanes more stable than less substituted alkanes.

Hyperconjugation refers to the delocalization of electrons with the primary sigma bonds. Usually, hyperconjugation involves the interaction of the electrons in a sigma orbital for example C–H or C–C with an adjacent unpopulated non-bonding p or antibonding σ* or π* orbitals to give a pair of extended molecular orbitals.

  It suggests a key factor in shortening of sigma bonds (σ bonds). For example, the single C–C bonds in 1,3-butadiene and propyne are approximately 1.46 Å in length, much less than the value of around 1.54 Å found in saturated hydrocarbons. For butadiene, this can be explained as normal conjugation of the two alkenyl parts. But for propyne, it is generally accepted that this is due to hyperconjugation between the alkyl and alkynyl parts.

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Answer: the presence of impurities in a compound lowers the melting point and broadens the range.

Explanation: this is because the impurities cause defects in the crystalline lattice of the compounds, it is easier to break down the intermolecular interactions between the compounds.

thus, when the compounds with impurities are given heat, it has less melting point than the purest form because of breakage of intermolecular interactions faster.

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In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient. In the reaction from the question we can properly balance by adding the following stoichiometric coefficients

1. 2 H2 + O2 -> 2 HO2

2. FeCl2 + H2O -> FeO + 2 HCl

3. C4H8 + 6 O2 -> 4 CO2 + 4 H2O

4. ?

5. 2 NaOH + MgCl2 -> 2 NaCl + Mg(OH)2

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

A negatively charged electron located in the outermost shell of the atom is termed as valence electron.

Positively charged atom means the atom having more no of protons then electron in  its nucleus and have symbol such as [tex]X^{+}[/tex].

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

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Answer:

Explanation:

500 = 60 * ?  

500/60 = ?

8.33333333333 = ?

so it's 8 and one third  :)

Flecainide, propafenone, and moricizine are unique in that they have no effect on the repolarization phase but all the above three do decrease conduction in the ventricles.

A class 1c anti-arrhythmic drug known as propafenone, which is also marketed under the name Rythmol, is used to treat conditions like atrial and ventricular arrhythmias that are linked to rapid heartbeat.

Moracizine, sometimes known as moricizine, is a class IC antiarrhythmic that is marketed under the trade name Ethmozine. It was discontinued in 2007 for commercial reasons after being used for the prevention and treatment of significant and life-threatening ventricular arrhythmias.

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Answer:

False

Explanation:

Biotic factors are those parts of the environment that are living such as humans, bacteria, fungi and protists.

Abiotic factors are those parts of the environment that are non-living.

Answer: 1,2,1,2

Answer:

1,2,1,2

Explanation:

See attached worksheet.  Balancing equations requires some organization and a pencil for making many changes in the process of finding the correct coefficients.  Add a litttle patience is required, but discovering the solution can be fun

N₂O₄(g)   ---->  2NO₂(g) is called as the decomposition reaction.

When one reactant in a chemical reaction is decompose to form one or more products then the chemical reaction is said to be decomposition reaction. The reaction is as follows :

N₂O₄(g)   ---->  2NO₂(g)

This equation is balanced equation. Dinitrogen tetroxide containing N - N single bond dissociates to form two molecules of nitrogen dioxide. the reaction is called as decomposition reaction . decomposition reaction are generally endothermic reaction because they require heat to decompose. as we know to break the bond energy is absorbed and formation of bond is the release of energy.

Thus, N₂O₄(g)   ---->  2NO₂(g) is called as the decomposition reaction.

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A velocity/time graph would look like with no acceleration is the straight line with zero slope

Here the given data is related with the concept and fundamental of velocity/time graph and the graphical representation where the velocity of an object is concluded with respect to the time is known as velocity-time graph

Therefore the given case in the graph is straight line with zero slope means no acceleration

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Answer:

C

Explanation:

got it right

Answer:

Divide the distance the object traveled by the time it took to get there.

Explanation:

To calculate the speed on an object, start by determining how far the object has traveled. Next, figure out the amount of time that the object took to cover that distance. Finally, divide the distance the object traveled by the time it took to get there. Don't forget to label the speed with the correct units of measurement.

Answer:yes but yes

Explanation:yes

Answer:

0.0220 g (22 mg) of NO2.

Explanation:

To solve this type of problem, it is best to work with grams. Remember that 1 kg equals 1000 g and 1 g equals 1000 mg. The conversion for 5.26 kg of nitrogen monoxide (NO) would be:

And for 7.64 mg of oxygen (O2) is:

The next step is to find the number of moles of each reactant using its molar mass. The molar mass of NO is 30 g/mol (you can calculate the molar mass of a compound using the periodic table):

And the moles of oxygen (O2) is 32 g/mol:

The next step is to see how many moles of NO" can be produced for each reactant.

You can see in the chemical equation that 2 moles of NO produce 2 moles of NO2, so the molar ratio between them is 1:1. This means that 175.33 moles of NO reacted produce 175.33 moles of NO2.

Now, you can see that 1 mol of O2 reacted produces 2 moles of NO2, so let's see how many moles of NO2 are being produced:

You can note that the limiting reactant, in this case, is oxygen (O2) because this reactant imposes the "limit" to produce the product.

The final step is to convert from 4.776 x 10^(-4) moles of NO2 to grams using its molar mass which is 46 g/mol. The conversion will look like this:

We obtain 0.0220 g (22 mg) of NO2 from 5.26 kg of NO and 7.64 mg of O2.

Answer:

Explanation:

A solid dissolves in a liquid when it mixes completely with the liquid. The solid has broken down into pieces so small that its particles spread all throughout the new mixture. The solid and liquid will stay mixed without shaking. Everything dissolves in water.

hope it helps!

Answer:

The correct answer is, D. growing in size

24.90 moles of carbon dioxide are formed if 8.30 moles of propane (c3h8) is burned in air (so oxygen won't run out).

A three-carbon alkane, propane has the chemical formula C3H8. At room temperature and pressure, it is a gas, but it can be compressed into a liquid for transportation.

Given:

8.30 moles of propane

Combustion reaction will be

   C3H8+5O2→3CO2+4H2O

Now from the above reaction it is clear that 1 mole of propane after combustion produces 3 moles of CO2

So 8.30moles of propane will produce

8.30*3molesof CO2/1Mole of C3H8=24.90 moles

Hence,24.90 moles of carbon dioxide are formed if 8.30 moles of propane (c3h8) is burned in air (so oxygen won't run out).

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According to the laws of thermodynamics, energy will remain constant in a system, therefore energy will not be created or destroed but it will be transformed, remaining constant. Letter B

Enzymes known as transfer RNA (tRNA) synthetases are responsible for joining a particular amino acid to its associated tRNA in order to produce proteins at the ribosome.

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