Most hydrogen (H, #1) atoms have a mass of 1. How many electrons would there be in one of these hydrogen atoms? (1 pt)
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Answer:

4800 times a day

Explanation: she blinks 300 times every hour and i times it by 16 as the hours everyday (24-8) so 300 x 16 equals 4800

Vrms, in meters per second, for helium atoms at 4.65 K (which is close to the point of liquefaction) is 1,268 m/s.

Vrms is the root mean square speed. Helium atoms are moving in random directions with speeds determined by the temperature of the helium. The root-mean-square velocity is the most probable velocity of the gas molecules in the gas container.

Below is the formula for the Vrms of an ideal gas molecule:Vrms = √(3kT/m)

where k is the Boltzmann constant, T is the absolute temperature of the gas in kelvins, and m is the mass of one molecule of the gas.

Substituting the values of k, T, and m, we get; Vrms = √(3(1.381×10^-23 J/K)(4.65 K)/(6.6464×10^-27 kg/mol)) = 1,268 m/s.

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The volume of the cube will be:

The volume of a cube is given by:

Volume = \(S^3\) where S refers to the three sides of the cube.

In this case, the sides are 27 cm x 21 cm x 4.4 cm

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Answer:

D. the answer is CAT-CGA-TCC mutates to CAT-TC

Explanation:

The mutation that is an example of deletion is;  CAT - CGA - TCC mutates to CAT - TCC

Mutation refers to the change in the amino acid sequence of a protein. There are several types of mutation such as;

Deletion involves the removal of part of the amino acid sequence in a protein sequence. In the case of CAT - CGA - TCC mutates to CAT - TCC, the CGA was removed and not replaced by any other codon. This is deletion.

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Answer:

Yes it does change

Explanation:

TRIS buffer is a widely used buffer in biochemical research. Buffer solution is a mixture of a weak acid and its corresponding base. In this buffer, the weak base is TRIS, and its corresponding acid is the protonated form of TRIS. The buffer can resist pH changes when acid or base is added to it, making it useful in experiments.

TRIS buffer is a widely used buffer in biochemical research. Buffer solution is a mixture of a weak acid and its corresponding base. In this buffer, the weak base is TRIS, and its corresponding acid is the protonated form of TRIS. The buffer can resist pH changes when acid or base is added to it, making it useful in experiments. To prepare a 1.0 L of 0.020 M TRIS buffer at pH, the following steps can be taken:

Step 1: Calculate the pH required for the buffer solution

The pH required for the buffer solution is calculated by using the Ka of TRIS. At 25°C, Ka = 8.32 x 10-9. Hence, the pKa value of TRIS can be calculated as: pKa = - log(Ka) = - log(8.32 x 10-9) = 8.08pH = pKa + log (base/acid)

Since the buffer solution is to be prepared at pH, the values of base and acid can be obtained by rearranging the equation above as follows: base/acid = 10^(pH - pKa)

At pH 8.0, the base/acid ratio is 10^(8.0 - 8.08) = 0.6309. This implies that the ratio of TRIS to its corresponding acid in the buffer should be 0.6309:1.

Step 2: Calculate the concentration of TRIS required

The concentration of TRIS in the buffer solution can be calculated using the formula: Buffer pH = pKa + log [A-]/[HA], where

[A-] = Concentration of conjugate base

[HA] = Concentration of conjugate acid

Since the required pH is 8.0, and the pKa value of TRIS is 8.08, the ratio of [A-]/[HA] is 0.6309 (obtained from step 1).

Let [A-] = x and [HA] = 0.6309x

The sum of [A-] and [HA] gives the concentration of TRIS in the buffer solution: [A-] + [HA] = 0.020 Mx + 0.6309x = 0.020 Mx = 0.01133 M

Therefore, 11.33 ml of 0.11 M TRIS will be required to make 1.0 L of buffer solution.

Step 3: Determine the required amounts of HCl and NaOH

The pH of TRIS at the concentration and pH required for the buffer is not exactly 8.0, so we need to adjust the pH using either HCl or NaOH.

To determine the required amount of HCl, we use the equation: Buffer pH = pKa + log [A-]/[HA] = 8.08 + log [A-]/[HA]HCl will be required to bring the pH down to 8.0. Since the buffer pH is 8.0 and the pH of the solution before adding HCl is 11.3, the difference in pH is 3.3. Therefore, the amount of HCl required can be calculated using the formula: Amount of HCl required (ml) = (0.10 M) x (0.033 L) = 0.0033 moles of HCl

The amount of NaOH required to neutralize the excess acid can be calculated using the formula: Amount of NaOH required (ml) = (0.0033 moles of HCl) / (0.10 M) = 0.033 L

NaOH is required to bring the pH back to 8.0. Hence, 33.0 ml of 0.10 M NaOH will be required.

Step 4: Mix all the components and adjust the volume

Mix the required amounts of 0.11 M TRIS, 0.10 M HCl, and 0.10 M NaOH in a volumetric flask of 1.0 L and adjust the volume to 1.0 L with distilled water. The resulting solution will be a 0.020 M TRIS buffer with a pH of 8.0. This is the required buffer solution.

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The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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Answer

0.009 mol/L

Explanation

Given:

Mass of KCl = 0.66 g

Volume of water = 700 mL = 0.7 L

From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g

What to find:

The molarity of the solution

Step-by-step solution:

The formula to calculate molarity is:

The first step is to calculate the molar mass of KCl

KCl = Mass of 1 mol K + Mass of 1 mol Cl

KCl = 39.10 g + 35.453 g

KCl = 74.553 g

So the molar mass of KCl = 74.553 g/mol

The next step is to determine the number of moles of KCl in 0.66g of KCl:

Put the values of mole and volume into the molarity formula above to determine the molarity of the solution:

The molarity is 0.009 mol/L

ANSWER

The number of moles of Pb(SO4)2 is 1.5 moles

EXPLANATION

Given that;

The mass of Li2SO4 is 330g

Follow the steps below to find the moles of Pb(SO4)2

Step 1; Write the balanced equation of the reaction

Step 2; Find the number of moles of Li2SO4 using the below formula

Recall, that the molar mass of Li2SO4 is 109.94 g/mol

The number of moles of Li2SO4 is 3.00 moles

Step 3; Find the number of moles of Pb(SO4)2 using a stoichiometry ratio

In the above equation of the reaction, 1 mole Pb(SO4)2 reacts to give 2 moles LiSO4

Let the number of moles of Pb(SO4) be x

Therefore, the number of moles of Pb(SO4)2 is 1.5 moles

The number of moles of magnesium, chlorine, and oxygen atoms in 2.70 moles of magnesium perchlorate is 2.70, 5.40, 21.60.

The formula of the compound is Mg(ClO​​​​4)2.

From the formula, we can see that 1 molecule of Mg(ClO4)2 contains 1 atom of Mg, 2 atoms of Cl and 8 atoms of O.

So 2.70 mol Mg(ClO4)2  contains

1 * 2.70 mol Mg = 2.70 mol Mg

2 * 2.70 mol Cl = 5.40 mol Cl

8 * 2.70 mol O = 21.60 mol O

So, the required answer is 2.70, 5.40, 21.60.

Therefore, the number of moles of magnesium, chlorine, and oxygen atoms in 2.70 moles of magnesium perchlorate is 2.70, 5.40, 21.60.

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(2*1.008) plus 16 equals 18.02g/mol of water. Reduced to 0.01 moles of water, 0.011099m is equal to 0.2g water * (1m/18.02g) 2. The formula for a copper(II) chloride hydrate is CuCl2 # x H2O. A 3.41-g sample of the hydrate is heated to force the water out.

What is Hydrate?

Hydrates are inorganic salts that either have a bond to a metal centre or have crystallised together with the metal complex and "contain water molecules mixed in a defined ratio as an intrinsic part of the crystal"[1]. The water of crystallisation or the water of hydration is also stated to be present in such hydrates. Deuterate can be utilized in place of hydrate if the water is dense water, which contains the isotope deuterium as its constituent hydrogen. A striking illustration is cobalt(II) chloride, which can be used as a water indicator because it changes colour from blue to red when hydrated. To indicate that a salt is hydrated, use the notation "hydrated compoundnH2O," where n is the number of water molecules in the salt's formula unit.

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d. The IE of Mg is higher than that of calcium is not true for the the ionization energy (IE) of the magnesium atom.

The ionization energy (IE) of an atom is the energy required to remove an electron from the atom. The IE of magnesium (Mg) is lower than that of sodium and neon, but higher than that of beryllium. The IE of Mg is lower than that of Mgt (Which is not an element) and higher than that of calcium.

Mg and Ca are both located in the same group (group 2) in the periodic table and have similar electron configurations. However, the IE of Mg is higher than that of Ca because the valence electrons in Mg are held more tightly than in Ca due to the increase in the effective nuclear charge.

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Answer:

Combination reaction.

Explanation:

The reaction depicted in the question is;

H2 (g) + Cl2 (g) ⟶ 2HCl (l)

Now, this reaction shows that two reactants namely hydrogen and chlorine react to form a single product named Hydrogen chloride. This process is called combination reaction.

Answer:

Explanation:

Combustion of coal releases carbon as CO2. Phytoplankton remove carbon dioxide from the atmosphere by photosynthesis. Carbon is passed along the food chain as fish eat the plants. Penguins feed on the fish, taking in the carbon compounds containing the original carbon atom.

The carbon atoms in coal end up in a penguin due to the process of food chain.

Penguins are aquatic flightless birds that are found in the Southern Hemisphere.

The food chain leads to the carbon atom into the penguin.

The carbon atoms are release from the coal combustion.

The released atoms go into plants leaves.

The herbivorous eat plants.

Then the carnivorous eats the herbivorous.

The carnivorous can be a fish and fish are eaten by penguins.

Thus, in this way, the carbon atoms in coal end up in a penguin due to the process of food chain.

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Answer:

Ge only has 2 pair of unpaired electrons.

Explanation:

The portion of energy from the Sun that reaches the Earth​ is known as

electromagnetic spectrum.

Energy transfer from objects in space such as the Sun usually reach the

earth through the process known as radiation. The energy is referred to as

electromagnetic energy.

Components of the electromagnetic spectrum are:

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DVCS makes it easy with electronic bookkeeping services. Electronic bookkeeping service includes entering bills, scan and storage of same, deposits, provision of bills to be paid reports, electronic payments, reconciliation of bank and credit card accounts, and much more.

Among the many services offered by electronic bookkeeping are bill entry, bill scanning and storage, deposits, bill-to-be-paid reports, electronic payments, bank and credit card account reconciliation, and much more.

Single-entry bookkeeping and double-entry bookkeeping are the two main types of bookkeeping used in accounting. Depending on their needs, businesses may select either one or both.

Source documents and accounting records reside in digital form rather than on paper in e-accounting. Internationally, this idea is acknowledged. It helps any sort of company cut costs by saving a great deal of time, effort, and paper.

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Answer:

C

Explanation:

Higher turbidity allows water to absorb more sunlight, causing an increase in temperature.

As long as the temperature and other conditions are kept constant, the rate constant will remain constant for that reaction.

Part A: Why should experimentally determined values of the rate constant, k, for each trial be fairly similar, even though the concentrations of the reactants are changed in each trial,

The experimentally determined values of the rate constant k for each trial should be fairly similar even though the concentrations of the reactants are changed in each trial because the rate constant is a measure of the intrinsic reactivity of the reaction itself, and is independent of the initial concentrations of the reactants.

As long as the temperature and other conditions are kept constant, the rate constant will remain constant for that reaction.

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Answer:  (1 Kilogram = 2.20462 pounds) . There are 2.2046226218 lb in 1 kilogram. To convert kilograms to pounds, multiply your figure by 2.205 for an approximate result. 1 kilogram is also equal to 2 lb and 3.27396195 oz. Working out a rough estimate in your head for converting to pounds and ounces may be tricky - remember that there are 16 ounces in a pound.

Answer:

a) longitudnal waves

b)parallel to vibration

c) transverse waves .it is used in a ripple tank

Answer:

15moles

Explanation:

The balanced equation of this reaction is as follows:

N2 + 3H2 → 2NH3

Molar mass of H2 = 2g/mol

mole = mass/molar mass

mole = 90/2

mole = 45moles.

Based on the above balanced equation, 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2)

Hence, 45moles of hydrogen gas will produce (45 × ⅓) = 15moles of nitrogen gas (N2).

Answer:

Its 14.9 for those who are doing the escape room :)

Explanation:

The elements Na, Li, K, Rb, and Cs in order of increasing ionization energy is Li, Na, K, Rb, Cs. The correct answer is option D.

What is ionization energy?

The ionization energy is the minimum energy which is required to remove a valence electron from an isolated gaseous atom, molecule or a positive ion. This measures the ability of an atom to form an ion by losing an electron to take part in a chemical reaction.

As we move down the group, the ionization energy decreases due to the increase in the atomic size of an element. So, the electrons are far from the nucleus and loosely bound to the nucleus.

Therefore, it is easy to remove an electron from the elements which are found lower in the group. So, the order of increasing ionization energy is Li, Na, K, Rb, Cs, the correct answer is option D.

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The amino acid sequence will be determined by the codons in the mRNA sequence that is being translated.

During translation, the mRNA sequence is read three nucleotides at a time, and each codon is translated into an amino acid based on the genetic code. This process is known as the "triplet code" because codons are made of three nucleotides.

The ribosome reads the mRNA sequence and translates it into a protein by recruiting amino acids in the correct order. The tRNA molecules carry the correct amino acids to the ribosome, where they are added to the growing polypeptide chain.

The ribosome continues to read the mRNA sequence until it reaches a stop codon, which signals the end of the translation and the completion of the amino acid sequence.

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Answer:

ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

Explanation:

Answer:

C

C

B

Explanation:

1. Dominant Traits are always shown on the allele because it takes over

2. A mutualistic relationship are 2 organisms that work together. For example, the rhino and oxpecker, which the oxpecker eats the pests on the rhino, creating food for the bird and healthiness for the rhino

3. Plants and Animals Cells have a cell membrane but animals do not have a cell wall. The answer could also be golgi but B is the best answer

The diffusion coefficient for urea dissolved in water at 37°C is 2.2 x 10⁻⁹ m²/s. The density and molecular weight of urea can be used to calculate the radius, r, of the solute particle in the equation.

To determine the diffusion coefficient for urea dissolved in water at 37°C, the viscosity and density of the solution would need to be measured and then used in the Stokes-Einstein equation to calculate the diffusion coefficient. The Stokes-Einstein equation relates the diffusion coefficient, D, to the viscosity, η, of the solvent and the temperature, T, according to the equation:

D = kT/(6πηr)

where k is the Boltzmann constant, T is the absolute temperature and r is the radius of the solute particle.

The calculation to determine the diffusion coefficient for urea dissolved in water at 37°C can be done using the Stokes-Einstein equation:

D = kT/(6πηr)

We can calculate the radius, r, using the density of urea, which is given as 1.32 g/cm³, and the molecular weight of urea (60.06 g/mol):

r = \((3M/4\pi d)^(^\frac{1}{3}^))\)

where M is the molecular weight of urea and d is the density of urea.

r =\((360.06/4\pi 1.32)^(^\frac{1}{3}^))\)

r ≈ 0.37 x 10⁻⁹ m

We can now substitute this value of r and the given values of k, T, and η into the Stokes-Einstein equation to calculate the diffusion coefficient:

D = (1.38 x 10⁻²³ J/K) x (310 K) / (6π x (0.6913 x 10⁻³ kg/m*s) x (0.37 x 10⁻⁹ m))

D ≈ 2.2 x 10⁻⁹ m²/s

So, the result is 2.2 x 10⁻⁹ m²2/s.

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