A proton transfer reaction can occur when a carbonyl compound is placed in an aqueous acidic solution.

a. True
b. False

Answer:

Elements in the same period have the same number of electron shells moving across a period elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

Explanation:

The frequency of gamma radiation is calculated to be = 1.11 *10^20 Hz.

A gamma radiation is also known as gamma ray. It is a penetrating form of electromagnetic radiation arising from radioactive decay of atomic nuclei. It consists of shortest wavelength electromagnetic waves, even shorter than X-rays.

Gamma rays can pass through the human body completely and as they pass through, they cause ionizations that damage tissue and DNA.

As we know that E= hf

Hence, f= E/h

Given E=  6.96 x 10-14 J

And, Planck's constant, h = 6.626 *10^-34 m² kg/s

f = 6.96 * 10^-14J  +/6.626 *10^-34

f = 1.11 *10^20 Hz

Hence, frequency of gamma radiation = 1.11 *10^20 Hz.

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Answer:

The correct answer would be 40 m/s

Explanation:

The reason 40 m/s is the correct answer is because m/s stands for meters per second.

Hope this helps you with what you're working on! :D

Answer:

40 m/s north

Explanation:

Velocity is a vector quantity, so it have both direction and magnitude.

Answer:

\(\boxed {\boxed {\sf 38.11 \ L}}\)

Explanation:

To find the volume, we need to convert grams to moles, then moles to liters.

We convert grams to moles using the molar mass. This is the mass of 1 mole of a substance. It is the same as the atomic mass found on the Periodic Table, but the units are grams per mole (not atomic mass units).

We have the compound carbon dioxide or CO₂. Look up the molar masses of the individual elements.

Notice that oxygen has a subscript of 2, so there are 2 atoms in each molecule. We have to multiply oxygen's molar mass by 2 before adding carbon's.

Use this value as a ratio.

\(\frac {44.009 \ g\ CO_2}{1 \ mol \ CO_2}\)

Multiply by the given number of grams: 74.87

\(74.87 \ g\ CO_2*\frac {44.009 \ g\ CO_2}{1 \ mol \ CO_2}\)

Flip the ratio so the units of grams cancel.

\(74.87 \ g\ CO_2*\frac {1 \ mol \ CO_2}{44.009 \ g\ CO_2}\)

\(74.87 *\frac {1 \ mol \ CO_2}{44.009 }\)

\({74.87 \ mol \ CO_2}{44.009 } = 1.701242928 \ mol \ CO_2\)

Any gas at standard temperature and pressure (STP) has a volume of 22.4 liters per mole.

\(\frac {22.4 \ L}{1 \ mol \ CO_2}\)

Multiply by the number of moles we calculated.

\(1.701242928 \ mol \ CO_2*\frac {22.4 \ L}{1 \ mol \ CO_2}\)

The units of moles cancel.

\(1.701242928 *\frac {22.4 \ L}{1 }\)

\(1.701242928 *{22.4 \ L}= 38.10784158 \ L\)

The original measurement has 4 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place.

The 7 tells us to round the 0 10 a 1.

\(38.11 \ L\)

Answer:

720

Explanation:

4 m/s

60 seconds

                            = 180 seconds

3 minutes

4 m/s

                             = 720 m/s

180 seconds

Answer:

If the material is opaque, light is reflected or absorbed. If the material is transparent, all light is transmitted. If the material is translucent, the light is scattered. The higher the frequency, the more energy the light waves have. The lower the frequency, the less energy the light waves have.

Explanation:

I'm literally learning about it right now and I got it right.

0.6988M

Explanation:

Cobalt (II) chloride = CoCl2 Molar mass = 129.839 g/mol

Molarity = moles/liter of solution

\(Moles = 22.7g \times \frac{1mol}{129.893g} = 0.1747moles\)

\(Liters \: of \: solution = 250 ml \times \frac{1 L}{1000 ml} = 0.250 L\)

\( Molarity = \frac{0.1747 moles}{0.250 L}=0.6988 M\)

Answer:

True

Explanation:

it does! because of the angle between Saturn and Earth and the Sun.

Hope this helps plz hit the crown :D

Answer:

22 b

Explanation:

that us the math

Answer:

physical quantity is used for measuring mass.

have a great day God bless you

Hydrogen is formed at the negative electrode (cathode) and oxygen at the positive electrode (anode) and the concentration of sulfuric acid increases.

Direct electric current is used in the electrolysis process to accelerate chemical reactions that would not naturally occur.

It can be seen that as the electrolysis proceeds the dilute sulfuric acid gets slightly more concentrated as only water is removed from the electrolyte as hydrogen and oxygen.

The ions present in the dilute acid are H+(aq), OH–(aq) and SO4 2–(aq).

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suggest an explanation of why the concentration of the sulfuric acid increases during electrolyis

Answer:

2,3,5

Explanation:

Got correct on EDG

Answer:

True

Explanation:

Answer:

True

Explanation:

the lungs is a part of respiratory system, so it is true; its main job is to remove Co2 from your body and bring in fresh air

Answer:

Ok giv me a min

Explanation:

The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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Answer:

Chemistry is used almost everywhere you go. from the car you use to get to work (gasoline burning) to the nuclear reactors that power many homes ( uranium becoming unstable to product electricity.

The quantum numbers that are not possible are 16,14,15.

The quantum numbers are used to address the position of the electron in an atom. They are the set of numbers that show the most probable position of the electron in an atom. There are four sets of quantum numbers that describe the position of an electron and they are;

1) Principal quantum number

2) Orbital quantum number

3) Magnetic quantum number

4) Spin quantum number.

The set of quantum numbers 16,14,15 is not possible because ml must have values of -l to +l as we know.

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The abbreviated electron configuration for Al2+ is [Ne]3s2 3p1

since Al has 13 electrons :  [Ne]3s2 3p1

Al2+ means it has lost 2 electrons to become :  [Ne]3s1

Electronic configurations in chemistry can be describe as the way each electron move independently in an orbital, in an average field created by all other orbitals. which also means  the arrangement of electrons in orbitals around an atomic nucleus.

An electron in simple term is a negatively charged subatomic particle that binds together with protons and neutrons  to form an atom's nucleus. it can also be seen as a tiny particle of matter that is smaller than an atom and has a negative electrical charge in it.

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Answer:

30 ml

Explanation:

Answer:

4740460000, or 4.74046*10^9

Explanation:

This is math i thnk

e means *10

\(5.63\cdot \:8.42\cdot \:10^{19-11}\)

\(5.63\cdot \:8.42\cdot \:10^8\)

\(10^8\cdot \:47.4046\)'

<3

Red

ok so this is saying

5.63 x 10^19 * 8.42 x 10^-11   indicates a scientific notation

plug into your graphing calculator and you get 4740460000 but make it imto three sig figs so the answer is: 4.74 x 10^9

Answer:

see below

Explanation:

A. The given reaction releases energy, indicating that it is an exothermic reaction.

B. The △H value for the reaction can be written as △H = -571.7 kJ, with a negative sign indicating the energy is released.

C. The balanced equation for the reaction between hydrogen and oxygen to form water is:

2H2(g) + O2(g) → 2H2O(l)

D. To calculate the amount of energy released when 10.0g of hydrogen is reacted with an excess of oxygen, we need to first determine the amount of hydrogen involved in the reaction.

The molar mass of hydrogen is 1.008 g/mol, so 10.0 g of hydrogen is equivalent to 10.0 g / 1.008 g/mol = 9.92 mol of hydrogen.

From the balanced equation, we can see that 2 mol of hydrogen is required for every 1 mol of oxygen, so the amount of oxygen involved in the reaction is twice the amount of hydrogen.

Therefore, the amount of oxygen needed for 9.92 mol of hydrogen is 2 × 9.92 mol = 19.84 mol.

Assuming that there is an excess of oxygen, all of the hydrogen will react, so the limiting reactant is oxygen.

Using the △H value of -571.7 kJ, we can calculate the amount of energy released as follows:

-571.7 kJ / 2 mol H2 = -285.9 kJ/mol H2

So the energy released when 10.0 g of hydrogen reacts with an excess of oxygen is:

-285.9 kJ/mol H2 × 9.92 mol H2 = -2836.53 kJ

Therefore, the reaction releases 2836.53 kJ of energy when 10.0 g of hydrogen reacts with an excess of oxygen.

The mass of Zn that would be required to completely react with 1.70 L of 0.550 M HCl in the given chemical reaction is 30.38g.

The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows;

mass = no of moles × molar mass

According to this question, the following chemical equation is given: Zn(s) + 2HCl(aq) → ZnCl₂ (aq) + H₂(g)

moles of HCl = 1.70 × 0.55 = 0.94 moles

If 1 mole of Zn reacts with 2 moles of HCl, then 0.94 moles of HCl will react with 0.94/2 = 0.47 moles of Zn.

mass of Zn = 0.47 moles × 65g/mol = 30.38g

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Answer:

Explanation:

Given species;

  Beryllium

  Calcium

   Sulfur

Unknown:

Give the symbol, number of neutrons and the mass number

Solution:

The symbols of the species are;

    Beryllium  -   Be

    Calcium     -  Ca

     Sulfur       -  S

Number of neutrons:

    Beryllium - 5

   Calcium    - 20

   Sulfur       -  16

Mass number :

  Beryllium - 9

    Calcium - 40

     Sulfur -    32

Answer:

280

Explanation:

total pressure=partial pressure (He)+partial pressure (N2)+partial pressure (H2)

Explanation:

The energy released due to breakage of bond or we can say that protons and electrons go from a structure of higher potential energy to lower potential energy. During this change, potential energy is converted to kinetic energy in form of heat.

Generally chemical potential energy is accessed in form heat, which the difference between the potential energies of reactant and product.

Based on the information provided, we have a reaction between hydrogen iodide (HI) gas and hydrogen gas (H₂) to form iodine gas (I₂). The equilibrium is represented by the equation:

2HI(g) = H₂(g) + I₂(g)

The concentration values given in the table correspond to the concentrations of H₂ and HI at different times.

a) From t=0 s to t=5 s: Without the specific graph mentioned in Figure 7.10, it is difficult to provide a precise explanation of the physical situation in the container during this time period. However, based on the equilibrium reaction given, we can make some general observations. At the start (t=0 s), the concentrations of H₂ and HI may be high. As time progresses, the reaction proceeds, and the concentrations of H₂ and HI may decrease while the concentration of I₂ increases. The specific behavior will depend on the rate of the forward and reverse reactions.

b) External factor altered at t=5 s: To bring about a change in the shape of the graph at t=5 s, some external factor must have been altered. The most likely factor is the total pressure within the container. Since the reaction involves gases, changes in pressure can affect the equilibrium position. However, according to the information given, a change in pressure will not affect equilibrium in this case since the number of moles of gas is the same on both sides of the equation. Therefore, if the shape of the graph changes at t=5 s, some other external factor, such as temperature or the addition of a catalyst, must have been altered.

c) Calculation of K at t=3 s: The equilibrium constant (K) can be calculated at any given time using the concentrations of the reactants and products. However, the concentrations of H₂ and HI at t=3 s are not provided in the information given. Without the necessary data, it is not possible to calculate K at t=3 s.

Lastly, the statement "1 dm³ COCI, decomposes" seems incomplete. If you provide additional information or clarify the question, I'll be happy to assist you further.

The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.

Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.

The Boyle's Law is given as:

P₁V₁ = P₂V₂

Given,

Initial pressure (P₁) = 0.974 atm

Initial volume (V₁) = 255 mL

Final pressure (P₂) = 1.05 atm

Final volume = V₂

The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:

P₁V₁ = P₂V₂

0.974 × 255 = 1.05 V₂

V₂ =  248.37 ÷ 1.05

= 236.54 mL

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Answer:

Iron is natural. Paper is man-made

Explanation:

Answer:

iron

Explanation:

The empirical formula :

C₁₀H₁₆N₄SO₇

Given

6.4 g sample

Required

The empirical formula

Solution

mass C :

= 12/44 x 8.37 g

= 2.28

mass H :

= 2/18 x 2.75 g

= 0.305

mass N = 1.06

mass S :

= 32/64 x 1.23

= 0.615

mass O = 6.4 - (2.28+0.305+1.06+0.615) = 2.14 g

Mol ratio :

= C : H : N : S : O

= 2.28/12 : 0.305/1 : 1.06/14 : 0.615/32 : 2.14/16

= 0.19 : 0.305 : 0.076 : 0.019 : 0.133 divided by 0.019

= 10 : 16 : 4 : 1 : 7

The empirical formula :

C₁₀H₁₆N₄SO₇