describe the reagents needed for a successful pcr experiment? what are their roles?

Answer:

2Al + 3Na2SO4 -----> Al2(SO4)3 + 6 Na

Explanation:

Product should be Al2(SO4)3

Because Al contains +3 charge

And SO4 contains -2 charge

To balance this postive and negative charge we multiple +3 with 2 and -2 with 3

Answer:

here hope it helps

Explanation:

covalent bonds

I believe it's (A). It will double.

Explanation:

Charles law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure. (Charles's law).

The pressure, volume, and temperature are the main factors of the ideal gas. At constant pressure when the temperature is doubled, then volume also gets doubled. Thus, option A is correct.

The ideal gas law has been known as the law that relates the pressure, volume, moles, and temperature of the gas particles. The relationship between the volume and the temperature of the gas was given by Charle's law.

According to Charle's law, the volume and the temperature have been known to have direct relation when the factor of pressure is said to be constant. If they exhibit the direct relation then doubling the temperature will double the volume of the gas.

Therefore, option A. the doubling of temperature doubles the volume is correct.

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Na₂ So₄(aq) + Ba (No₃)₂ (aq) → 2NaNo₃ (aq) + Baso₄ (s)

The complete ionic equation is,

2 Na⁺ (aq) + so₄²⁻ (aq) +. Ba²⁺ (aq) → 2 Na⁺(aq) + 2 No₃⁻ (aq) + Baso₄ (s) +2No₃⁻ (aq)

Canceling the same ions on both sides we get the net ionic equation as,

Ba²⁺ (aq) + so₄²⁻ (aq) → Baso₄ (s).

A net ionic equation is a chemical equation that describes only the elements, compounds, and ions directly involved in a chemical reaction. A net ionic equation is a chemical equation of a reaction that lists only the species involved in the reaction.

The net ionic equation is commonly used in acid-base neutralization reactions, double displacement reactions, and redox reactions. Break down all soluble ionic compounds into their respective ions and write the ionic equations. Each ion should be labeled with its charge and (aq) to indicate that it is in solution. A factor is used to indicate the number of each ion present.

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A single substitution reaction a strip or zinc metal is added to a copper(II) nitrate solution. Copper will be pushed out of the solution by zinc. As a result, zinc nitrate, Zn(NO3)2, and copper metal, Cu, produced.

An illustration of a single substitution reaction is the reaction of potassium (K) and water (H2O). In the process, hydrogen gas (H2) is released and potassium hydroxide (KOH), a colourless solid chemical, formed. 2K + 2H2O 2KOH + H is the reaction's equation.

This page explains the Copper II Nitrate formula, sometimes referred to as Cupric nitrate or Copper Dinitrate formula. This inorganic substance exists as a solid with blue crystals. Cu(NO3)2 is the chemical formula for Copper II Nitrate.

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One isotope has a mass of 24.02 amu and accounts for 49.4% of the total mass of the sample. The mass of the other isotope is 28.02 amu. The average atomic mass for this element is 25.99 amu.

To calculate the average atomic mass of the element, we need to use the relative abundance and mass of each isotope.

Let's call the mass of the first isotope x. We know that this isotope makes up 49.4% of the sample, so the relative abundance of the second isotope (with mass 28.02 amu) is 100% - 49.4% = 50.6%.

Now we can set up an equation to solve for x:

(0.494)x + (0.506)(28.02) = average atomic mass

Plugging in the values:

0.494)(24.02) + (0.506)(28.02) = average atomic mass

11.87188 + 14.16712 = average atomic mass

26.039 amu = average atomic mass

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Answer:?

?Explanation:

Answer:

+ 2 degrees Fahrenheit

Explanation:

To determine the molar mass of the element, we will use the formula:$$\mathrm{Molar\ mass}=\frac{\mathrm{Density}}{\mathrm{Moles}/\mathrm{Volume}}$$Given:$$\mathrm{Density}=13.55\:\mathrm{g/cm^3}$$$$\mathrm{Moles}=1.16\:\mathrm{mol}$$$$\mathrm{Volume}=17.17\:\mathrm{cm^3}$$.

Given that, density = 13.55 g/cm3molar mass = ?mass of sample = density x volume$$\therefore \ \text{mass of sample} = \mathrm{density} \times \mathrm{volume}$$$$\Rightarrow\mathrm{mass} =13.55 \:\mathrm{g/cm^3} \times 17.17 \:\mathrm{cm^3}=232.7315\:\mathrm{g}$$Now, Molar mass is given by,$$\mathrm{Molar\ mass}=\frac{\mathrm{Density}}{\mathrm{Moles}/\mathrm{Volume}}$$$$\Rightarrow\mathrm{Molar\ mass}=\frac{13.55\:\mathrm{g/cm^3}}{1.16\:\mathrm{mol}/17.17\:\mathrm{cm^3}}=103.1\:\mathrm{g/mol}$$Therefore, the molar mass of the element is 103.1 g/mol.

The given information is about the element's sample. The formula for molar mass is used to find out the unknown molar mass of the given element.

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NADPH inhibits the pentose phosphate pathway

NADPH is a product of the pentose phosphate pathway, which generates NADPH and ribose-5-phosphate.

NADPH is a coenzyme that plays a vital role in many metabolic processes, including the pentose phosphate pathway.

Therefore, it is incorrect to say that NADPH inhibits the pentose phosphate pathway. Instead, NADPH is a key participant in this pathway, where it is produced and utilized to synthesize nucleotides, amino acids, and fatty acids, and to protect cells against oxidative stress

When there is an excess of NADPH, it can inhibit the pentose phosphate pathway through feedback inhibition, thus reducing the production of NADPH. This is important to maintain a balance of NADPH and other metabolites in the cell.

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Methionine is always the first one to be incorporated into a newly made protein followed by identification of the only start codon on mRNA.

Amino acids are transferred by initiator tRNAs to the mRNA strand by the process of translation. Each tRNA has an anticodon, which is a group of three nucleotides that pairs with an appropriate mRNA codon to form a stable bond. The amino acid that the codon specifies is carried by the opposite end of the tRNA. AUG is one codon that serves as a "start" signal to initiate translation (it also specifies the amino acid methionine).

All newly created proteins have methionine as the first amino acid at their N-terminal end, the end of a protein that is synthesised initially, because the initiator tRNA always carries this amino acid (in bacteria, a modified version of methionine called formylmethionine is employed).

Transfer RNAs, or tRNAs, are molecules that read an mRNA's codons sequentially (from the 5' end to the 3' end) during translation.

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In the provided activity, you are observing the effects of different solutions on the shape of red blood cells. Let's go through each effect and explanation:

Effect of isotonic solution on cell shape:

When an isotonic solution, such as 0.9% NaCl or 5% dextrose, is added to the edge of the coverslip, the red blood cells will not change their shape significantly. An isotonic solution has the same osmolality as the cell, meaning the concentration of solutes in the solution is similar to that inside the cell. As a result, there is no net movement of water across the cell membrane, and the cells maintain their original shape.

Effect of hypertonic solution on cell shape:

When a hypertonic solution, such as 25% NaCl, is added to the edge of the coverslip, the red blood cells will undergo a change in shape. A hypertonic solution has a higher osmolality than the cell, meaning the concentration of solutes in the solution is higher than that inside the cell. In this case, water will move out of the red blood cells through osmosis, from an area of lower osmolality (inside the cells) to an area of higher osmolality (the hypertonic solution). The loss of water causes the cells to shrink and become crenated or wrinkled.

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Answer:

Molality of glucose is 7×10⁻¹⁰ mol/Kg

Explanation:

\(Molality = \frac{Moles of solute}{Kg of Solvent}\)

you need to do 2 things before use this formula:

1. Transform 6.36 g of glucose into moles

2. Transform 500 mL of water into grams

1. To transform 6.36 g of glucose into moles, we need to know the molar mass of glucose. The molecular formula of glucose is C₆H₁₂O₆

Molar Mass of:

O = 16

H = 1

C = 12

So, to calculate the molar mass of glucose:

(6x12)+(12x1)+(16x6) = 72 + 12 + 96 = 180 g/mol

Now:

6.36 g of glucose --- x moles

180 g of glucose --- 1 mol

x = 6.36/180

x = 0.035 moles

2. First, transform 500 mL into L = 0.5 liters.

To transform 500 mL of water into grams we need to know the density of the water. It is 997 Kg/m³.

liters to m³:

1 liter --- 0.001 m³

0.5 --- x

x = 5×10⁻⁴ m³

997 Kg --- 1 m³

5×10⁻⁴ --- x

x = 5×10⁻⁷ Kg

Now: 0.035 moles/5×10⁻⁷ Kg =

Molality of glucose is 7×10⁻¹⁰ mol/Kg

Answer:

Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there.

Explanation:

Answer:

1.17 atm

Explanation:

Calculation to determine the total pressure inside the container (in atm)

Using this formula

Total pressure = Partial pressure 1 + Partial pressure 2

Where,

Partial pressure 1=0.53 atm

Partial pressure 2=0.639 atm

Let plug in the formula

Total pressure = 0.53 atm + 0.639 atm

Total pressure = 1.17 atm

Therefore the total pressure inside the container (in atm) is 1.17 atm

Answer:

4.0 kg

Explanation:

M = W/g = 39.2/9.8 = 4.0 kg

sorry if its wrong-

Answer:

start moving faster

Explanation:

i would guess because they slow down our freeze when they get cold

Answer:

last option is correct.

Air molecules surrounding the metal will speed up and metal molecules will slow down

Explanation:

the metal cools when placed in room temperature air which causes surrounding air to heat up.

the speed of molecules slow down for any material which cools and molecules speed increases when any material heats up

Answer:

It is used in induction of electric current through electromagnetic induction.

True because,

Atoms of different elements have different masses because different atoms have a different number of subatomic particles i.e neutrons, protons and electrons.

Atomic mass of an element cannot be same as the mass of a single atom of that element because by investigation of mass spectrometry it was found that many naturally occurring elements exist in the form of two or more isotopes. Isotopes are the atoms of the same elements having the same atomic number containing the same number of protons but the different number of neutrons and because of this, it possesses different mass number. So, the observed atomic mass of the atom of an element is the average atomic mass of the elements. Average of masses of a different isotope of the same element is taken and then the atomic mass of the element is decided.

A formula to calculate average atomic mass:-

Example:-

Lithium exists in nature in the form of two isotopes Li−6 and Li−7 with atomic masses 6.0151u and 7.0160u and the percentages 7.59 and 92.41 respectively.

Solution:- Average atomic mass of Li

[Atomic mass of Li−6× percentage + Atomic mass of Li−7× percentage]/100

=

100

6.015u×7.59+7.0160u×92.41

​

=6.939u

Hence, the atomic mass of an element is not the same as the mass of a single atom of that element; Atomic mass is average of isotopic mass o atoms.

Answer:

TRUE BRUHHHH maybe

Explanation:

TRUE BRUHHHHHHHGGGHHHGHGHGHGHHHHHHHHHHHHHHHHHHHHHHH

Answer:

Count each type of atom in reactants and products. ...

Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances. ...

Repeat steps 1 and 2 until the equation is balanced

Explanation:

Step 1: Coefficients Versus Subscripts. When approaching a chemical equation, it is important that you understand the difference between coefficients and subscripts. ...

Step 2: Sum the Atoms. ...

Step 3: Balance the First Element. ...

Step 4: Repeat for the Other Elements. ...

Step 5: Tips.

Answer:

2C6H6 + 15O2 = 12CO2 + 6H2O

Explanation:

This is a combustion reaction meaning a substance (in this case Benzene or C6H6) reacts with oxygen gas (O2) and releases energy in the form of light and heat.

so Benzene (C6H6) and Dioxygen (O2) are reactants meaning they are on the left side of the equation

Carbon Dioxide (CO2) and Water (H2O) are the products meaning they are on the right side of the equation

To balance an equation you need an equal amount of each element/compound/polyatomic on each side of the equation

so 2C6H6 + 15O2 = 12CO2 + 6H2O:

(2•6) = 12 C = (12•C) = 12 C ~ 12C = 12C

(2•6) = 12 H = (2•6) = 12 H ~ 12H = 12H

(15•2) = 30 O2 = [(12•2) • (6•1)] = 30 O2

~ 30 O2 = 30 O2

so the equation is now balanced

feel free to ask if you have any other questions

hope this helps :)

The balanced equation of the reaction is:

\(O_2 + 2 NO\) ⇒ \(2 NO_2\)

Every gas occupied 24 L in one mole in r.t.p. according to the equation:

\(24 \times n = V\)

8/24=0.333 mol

2 moles of NO makes 2 moles of \(NO_2\\\) so

0.333*24=8L

Based on the calculations, the total pressure of the final products is equal to 1.76 atm.

From the information provided about this chemical reaction, we can logically deduce the following parameters:

Next, we would write the properly balanced chemical equation for this chemical reaction:

                               I₂ + 5F₂   ⇒  2IF₅

Also, we would determine the number of moles of each atom of I₂ and F₂:

\(Number \;of \;moles = \frac{mass}{molar\;mass}\)

Substituting the given parameters into the formula, we have;

Number of moles = 63.45/253.8

Number of moles = 0.25 moles.

Assuming I₂ were limiting, we would need:

5 × 0.25 = 1.25 moles of F₂.

For fluorine gas, we have:

PV = mRT/MM

Mass, m = PVMM/RT

Mass, m = 2.5(5.00)(38)/(0.0821 × 298)

Mass, m = 475/24.4658

Mass, m = 19.42 grams.

Number of moles = 19.42/38

Number of moles = 0.51 moles.

The total number of moles = 0.25 + 0.51 = 0.76 mol.

For the mole fraction of I₂, we have:

Mf = 0.25/0.76

Mole fraction = 0.33.

For the mole fraction of F₂, we have:

Mole fraction = 1 - 0.33 = 0.67.

Next, we would determine the total pressure of the two elements by applying Dalton's law:

Total pressure = 0.33 × 0.27 + 0.67 × 2.5

Total pressure = 1.76 atm.

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Answer:

c

Explanation:

I'm pretty sure it's C. If it is not then it might be d

Answer:

91.3

2 Significant figures

Answer:

The values have 2 significant numbers ╮(￣ω￣;)╭

In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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Answer:

Yes! You are correct

Explanation:

The higher the frequency of light, the higher its energy. .