What is the pH of a 0.034 M
solution hydroiodic acid (HI)?
pH = [?]

Answer:

1.natural 2.weathering 3.soil

The factors that affect the strength of electric or magnetic fields are loop count, the current, the wire size, and the presence of an iron core.

Electromagnetic field is defined as the field that is made up of both the electric and magnetic field that can help in conduction of electricity.

The factors that affect the strength of electric or magnetic fields include the following:

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The molar mass of the unknown substance is 256.6 g/mol.

The molar mass of sucrose C12H22011 is 342 g/mol.

A 2% sucrose solution is isotonic with 1.5% solution of an unknown substance.

Molar mass of sucrose = Molar mass of unknown substance.

2% × 1000/342 = 1.5% × 1000/x

x = 342 × 1.5/2

x = 256.5 g/ mol

Therefore, the molar mass of the unknown substance is 256.6 g/mol.

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Answer:



a = 0.6 m/s² .

Explanation:

given that:

• Vi = 12m/s

• Vf = 21 m/s

• t = 15 s

• a = ?

∴ a = (Vf - Vi) / t

⇒ a = (21 - 12) / 15

⇒ a = 0.6 m/s² ...answer...

Note that:

▪ 'Vf' refers to final velocity

▪ 'Vi' refers to initial velocity

▪ 't' refers to time period

▪ 'a' refers to acceleration



hope that helps...

Answer:

.......................................

Answer:

2 CuCl₂ (aq) + Sn(NO₂)₄ (aq) ---> 2 Cu(NO₂)₂ (aq) + SnCl₄ (aq)

Explanation:

You can safely assume that this is a double-displacement reaction. In these reactions, the cation of one molecule is substituted for the cation of another molecule, and vice versa. Once the reaction occurs, you are left with the products:

copper (II) chloride + tin (IV) nitrite ---> copper (II) nitrite + tin (IV) chloride

The balanced equation is:

2 CuCl₂ (aq) + Sn(NO₂)₄ (aq) ---> 2 Cu(NO₂)₂ (aq) + SnCl₄ (aq)

Answer:

the cells in your body

Explanation:

Most people that i have asked this similar question to, have said the sun. It's not the sun because the sun disappears at night. Your body produces heat because your cells are burning up energy.

Answer:

A.DNA

Explanation:

Ahaa Its gona be right

Answer:

D.N.A.

Explanation:

Hi student! Let me help you out on this question.

D.N.A. is the molecule which carries instructions for inherited traits.

[tex]\therefore,Option\quad A \quad is \quad correct[/tex]

Hope that this helped! have a good day ahead.

Answer:

=2007.69 Torr

Explanation:

The new pressure of helium gas assuming constant temperature is equal to 2007.69

Torr.

Given the following data:

Initial volume = 293 mL

Final volume = 0.115 L

Initial pressure = 788 Torr

Temperature = 25°C.

Conversion:

Initial volume = 293 mL to L = 293/1000=0.293L

To determine the new pressure assuming constant temperature, we would apply Boyle's law:

Mathematically, Boyle's law is given by the formula;

PV=K

P1V1=P2V2

Where;

P1 is the original (initial) pressure.

P2 is the final pressure.

V1 is the original (initial) volume.

V2 is the final volume.

Substituting the given parameters into the formula, we have;

788×0.293 = P2 × 0.115

230.884 = 0.115P2

P2 = 230.884/0.115

P2 =2007.69

Answer:

P = 29,523 kPa

Explanation:

The formula of the Ideal Gas Law is:

PV = nRT

In this formula,

P = pressure (kPa)

V = volume (L)

n = number of moles

R = 8.314 (L*pKa/mol*K)

T = temperature (K)

You have been given values for all of the variables but pressure. Therefore, you can plug the given values into the equation and simplify to find pressure.

PV = nRT

P(1 L) = (13 moles)(8.314 L*kPa/mol*K)(273.15 K)

P(1 L) = 29523

P = 29,523 kPa

**I am pretty certain my math is correct. I also checked with an ideal gas law calculator and got this same answer. Either I am missing something or some of the values are wrong. Hopefully this explanation helps clear something up though.**

Answer:

Avogadro's number or Avogardro’s constant

Explanation:

I’m pretty sure this is correct if it’s not I’m sorry lol.

From the calculations, we can see that the half life of the material is 11.4 days

The term radioactivity refers to the spontaneous disintegration of a radioactive nucleus. The time taken for half of the radioactive material to remain.

Given that;

N/No = (1/2)^t/t1/2

N = amount that remained

No = amount that remained in the beginning

t = time taken

t1/2 = half life of the substance

N =Noe^-kt

4.995 ×10^9 = 1.75 x 10^12e^-55k

3.5* 10-2=e^-55k

k = ln3.5* 10-2/-55

k =0.06095

t1/2 = 0.693/0.06095

t1/2 = 11.4 days

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Answer:

4.5 J wasted

Explanation:

10 % efficient means 90% wasted

90% of 5 J   =  .9 *5 = 4.5 J

Answer:

silicon 0.712 J/g°C

Explanation:

i hope this helps you, sorry if im wrong, but this should be correct!

Answer:

.7109  j / gm-C

Explanation:

Specific heat =  j/gm-C

j = 2110     gm = 44.7     C = ( 89.6-23.2) = 66.4

2110 /(44.7 * 66.4) = .7109   j/gm-C

Answer:

No.

A more reactive metal displaces or pushes out a less reactive metal from its compound. In the reactivity series, sodium is more reactive than iron hence no displacement reaction will occur.

The molarity of the solution given the data from the question is 0.0135 M

Molarity is simply defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of MgSO₄ = 1.78 / 120.4

Mole of MgSO₄ = 0.0148 mole

Molarity = mole / Volume

Molarity = 0.0148 / 1.1

Molarity = 0.0135 M

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[tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.

Malic acid is sour and acidic. This helps to clear away dead skin cells when applied to the skin.

The conversion of oxaloacetic acid into malic acid takes place in [tex]C_4[/tex]plants through the [tex]C_4[/tex] cycle by the process of photosynthesis.

Carboxylation of pyruvate produces oxaloacetate (OAA). This is an energy-requiring reaction that uses adenosine triphosphate (ATP).

Hence, [tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.

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From the solubility curve as shown, the solution of 95g at 40 C can be said to be unsaturated.

The term saturated solution has to  do with a solution which contains just as much solute as it can normally hold at a particular temperature.

Looking at the solubility curve as shown, the solution of 95g at 40 C can be said to be unsaturated.

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Answer:

2,137... gallons

Explanation:

(160+140+14x16x2)/350=2,137...

Answer:

0.158g/L.

Explanation:

MM of helium gas or He =4 g/mol

P = 0.974 atm

T = 27 °C, but we need absolute temperature.

TK = TC + 273

T = 27 + 273 = 300 K

m/V = (4 g/mol · 0.975 atm) / (0.0821 L·atm/mol·K · 300 K)

m/V = 0.975/6.1575 g/L

m/V = 0.158g/L

Answer: The density of the helium is 0.158g/L.

The heat will go up right above the top of the pot and then will go through the hole in the centre.

Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.

Conduction is probably the most basic and intuitive way of achieving heat transfer. Something hot touches something cool and the cool thing heats up. For instance, the water in a pot boils when the flame from the stovetop heats the pan, and the heat from the pan is transferred to the water via conduction.

Thus, the heat will go up right above the top of the pot and then will go through the hole in the centre.

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Answer:

Monosaccharides

A monosaccharide is the monomer of a carbohydrate. Carbohydrates, such as sugars and starches, store energy. Others, such as cellulose and chitin, are structural in nature.

Answer:

monosaccharide

Explanation:

a monosaccharide is the monomer of carbohydrates.

0.1 mL of the stock solution of the enzyme is taken and made up to 5.0 mL with 0.001M HCl in order to prepare a 50-fold diluted enzyme.

Dilution is a process of making a solution of lower concentration from a solution of higher concentration by the addition of solvent to a given volume of the solution of higher concentration.

Dilution of solutions is done using the dilution formula in order to determine the given volume of diluent or stock solution required. The dilution formula is given below:

where:

For the enzyme dilution;

C1 = 1 mg/mL

C2 = 1/50 mg/ml = 0.02 mg/ml

V= ?

V2 = 5 ml

V1 = C2V2/C1

V1 =  0.02 * 5/1 = 0.1 mL

Therefore, 0.1 mL of the stock solution of the enzyme is taken and made up to 5.0 mL with 0.001M HCl in order to prepare a 50-fold diluted enzyme.

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Answer:

2.5M

Explanation:

First calculate the gram-formula mass of CaCO3 (add up the mass of each element in the compound)

40.1 + 12.01 + 16(3) = 100.11

Now use the mole calculation equation on Table T and plug in the numbers

(Keep in mind that 25 is the given mass)

25/100.11 = 2.497 or 2.5M

Answer:

convert 250.0 mL in Liters :250. 0 / 1000 = 0,25 LDensity = 1.240 g/LMass

Explanation:

the number of neutrons in aluminium is 14

Answer:

14

Explanation:

number of neutrons in an atom is difference between mass number and atomic number

atomic number of Al is 13 and mass number of Al is 27

number of neutrons = 27 - 13 = 14

Answer:

The molar mass of CO2 = 44.01 g/mol

Explanation:

Start with 2.09 moles of HCl and convert to moles of CO2 For every 2 moles of HCl used, 1 mole of CO2 is formed.

2.09 mol HCl •(1 mol CO2/2 mol HCl) = 1.045 mol CO2

Now convert moles of CO2 to grams using the molar mass.

1.045 mol CO2 • 44.01 g/mol = 45.99 grams CO2

3 significant figures = 46.0 grams CO2

Hope This Helped

Answer: B. [tex]\text{CH}_{3}\text{COO}^{+}[/tex]

Explanation:

To find the conjugate base, you add a hydrogen ion and add 1 to the overall charge.

CH[tex]_3[/tex]COO⁻ is the conjugate base of  CH[tex]_3[/tex]COOH in the given reaction. Therefore, the correct option is option B.

Conjugate acids and bases are ideas included in the Bronsted-Lowry acid-base theory. An acid losses a hydrogen ion as it splits into its electrons in water. The conjugate base of the acid is the species that results.

A conjugate base comprises the base participant, X-, of two compounds that convert into one another by acquiring or losing a proton, according to a more comprehensive definition. In a chemical process, the conjugate base has the capacity to either gain and absorb a proton. The proton and hydrogen is given away in the process by the conjugate acid. CH[tex]_3[/tex]COO⁻ is the conjugate base of  CH[tex]_3[/tex]COOH in the given reaction.

Therefore, the correct option is option B.

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1) The diagram shows an exothermic reaction since the potential energy of the products is less than that of the reactants, meaning energy was released.

2) To find the change in enthalpy, determine the difference between the potential energy of the products and the potential energy of the reactants. (on this diagram, C-A) To find the activation energy, find the difference between the potential energy of the reactants and the "peak" of the curve (on this diagram, B-A). For this diagram, both the enthalpy and activation energy are positive.

Answer:

Part 1 and Part 2 Answer

Explanation:

Part 1:

The reactions have higher potential energy than the products, this means it is an exothermic reaction.

Part 2:

Change in enthalpy is determined by the difference between potential energy of the reactants (A) and potential energy of the products (C). Because the reactants is higher than the products' and we know the reaction is exothermic, the change in enthalpy will be negative (-∆H).

The activation energy can be determined by the difference between the peak of the graph (B) and the potential energy of reactants (A). The activation energy would be positive.