hromium can be electroplated from an aqueous solution containing sulfuric acid and chromicacid, h2cro4. what current is required to deposit 1.25 g chromium metal (atomic weight

Answer:

t = 3.29 hour

Explanation:

It is given that,

The distance between a car and the lizard is 35.3 miles.

The speed of the car is 30.5 m/s

We need to find how long will it take the car to drive 35.3m.

It means,

Distance, d = 35.3 miles

Since, 1 mile = 1609.34 m

⇒ 35.3 miles = 56809.84 m

Speed, v = 30.5 m/s

Speed, v = d/t

So,

\(t=\dfrac{d}{v}\\\\t=\dfrac{56809.84\ m}{30.5\ m/s}\\\\t=1862.61\ s\)

or

t = 3.3 hour

Hence, it will take 3.3 hour.

The selected example of an aluminum binary phase diagram is the Aluminum-Magnesium (Al-Mg) phase diagram. The aluminum-magnesium system has two terminal phases; the α-Al phase that has a face-centered cubic (fcc) crystal structure, and the Mg2Al3 phase that has a hexagonal close-packed (hcp) crystal structure.

The maximum solubility of Mg in aluminum is about 17.5 wt%, and the maximum solubility of Al in Mg is about 1.8 wt%. The main application of Al-Mg alloys is in the aerospace industry, specifically in the manufacturing of airplanes, helicopter bodies, and spacecraft components. The addition of magnesium to aluminum increases the strength and hardness of the alloy. The microstructure of Al-Mg alloys consists of a dendritic α-Al matrix and a hard intermetallic compound Mg2Al3. The amount of Mg2Al3 present in the alloy depends on the cooling rate, annealing temperature, and alloy composition.

The solidification of Al-Mg alloys involves nucleation, growth, and coalescence of dendrites. Dendrites are formed due to the difference in solubility between aluminum and magnesium, where magnesium has a lower solubility in aluminum.

As the alloy cools, magnesium atoms will migrate to the interface between the liquid and solid, forming dendrites. The dendrites will continue to grow and branch out, forming a microstructure that consists of an α-Al matrix and Mg2Al3 intermetallics.

The phase present at room temperature is α-Al, with a composition of approximately 83.5 wt% Al and 16.5 wt% Mg. The phase fraction of Mg2Al3 at 250C will depend on the cooling rate, annealing temperature, and alloy composition.

To know more about Magnesium  visit :

https://brainly.com/question/8351050

#SPJ11

Answer: 8.1 days

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant = x

a - x = amount left after decay process= \(\frac{x}{4}\) 

a) to find rate constant

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(k=\frac{0.693}{2.7days}=0.257days^{-1}\)

b) for completion of one fourth of reaction

\(t=\frac{2.303}{k}\log\frac{x}{\frac{x}{4}}\)

\(t=\frac{2.303}{0.257}\log{4}\)

\(t=8.1days\)

Thus after 8.1 days , one fourth of original amount will remain.

Answer:

Matter is any substance that has mass and takes up space. Any physical object consists of matter. It doesn't matter whether it's an atom, element, compound, or mixture. It's all matter. (Not a pun, i promise ツ)

However, unlike some believe, not everything you encounter in the world is matter. Matter can be converted into energy, which has neither mass nor volume. So, light, sound, and heat are not matter. Most objects have both matter and some form of energy, so the distinction can be tricky. For example, a candle flame certainly emits energy (light and heat), but it also contains gasses and soot, so it is still matter. The building blocks of matter are called "atoms" and "molecules." They, too, are matter. The matter we can detect normally is called "baryonic" matter. However, there is another type of matter out there, which can't be directly detected. But its influence can. It's called dark matter.

Attached below is a picture of examples of matter.

Key words and phrases:

matter, heat, light, dark matter, baryonic matter, sound, energy, mass, volume, space, physical

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Answer:

How do the formulas differ for molecular and ionic compounds? The formula for a molecular compound represents the atoms that make up one molecule of a compound. The formula for an ionic compound represents one formula unit of the compound. ... Put two electron between atoms to form a chemical bond.

Explanation:

The necessary voltage to power the electrolysis of molten sodium chloride is 4V.

Electrolysis is the breakdown of a compound into the elements it is formed from by passing electricity through it. It is actually a chemical reaction in which one element loses electrons and the other may gain electrons. The process of electrolysis has wide applications in electroplating, metallurgical processes, production of chlorine gas, etc.

Molten sodium chloride is generally used in the production of chlorine gas and sodium metal. This molten or aqueous form of sodium chloride is also known as brine. The process is carried out in a cell called the Down's cell.

To know more about electrolysis, here

brainly.com/question/12054569

#SPJ4

Answer:

photosynthesis

Explanation:

chloroplasts store sugar which is needed for photosynthesis

A cyst is defined as the abnormal growth that occurs in the body which may be cancerous and is usually filled with fluid.

A cyst is an abnormal growth that occurs in tissue layers of the body that is usually filled with serous fluid.

The presence of cyst in the body can occur due to the following causes:

Depending on the cause, the cyst is usually filled with the following:

Learn more about cyst here:

https://brainly.com/question/1627189

#SPJ1

Answer:

jghjhfghjklkjhgfdgfdsdh

Explanation:

Answer:

vaporisation and freezing

Explanation:

also whoever is the other guy who answered it for points is a ***** ( brainly yelled at me and called me rude)

Answer:

The most common isotope is Bromine-79.

Explanation:

The thickness of lead in grams per square centimeter (-1m in g/cm²) is approximately 0.624 g/cm².

To calculate the thickness in grams per square centimeter (-1m in g/cm²), we can use the following equation:

Thickness (g/cm²) = (Density of material) * (Thickness in cm)

Given:

Density of lead = 11.4 g/cm³

Initial count rate = 996 cps

Final count rate = 613 cps

The reduction in count rate is due to the absorption of gamma radiation by the lead. We can use the formula:

Reduction in count rate = Initial count rate - Final count rate

Plugging in the values:

Reduction in count rate = 996 cps - 613 cps

Reduction in count rate = 383 cps

Now, let's convert this reduction in count rate to a thickness of lead in grams per square centimeter. We can assume a linear relationship between the reduction in count rate and the thickness of lead.

Thickness (g/cm²) = (Reduction in count rate) / (Initial count rate) * (-1m in g/cm²)

Plugging in the values:

383 cps = 613 cps * (-1m in g/cm²)

Rearranging the equation to solve for (-1m in g/cm²):

(-1m in g/cm²) = (383 cps) / (613 cps)

Calculating the value:

(-1m in g/cm²) = 0.624

Therefore, the thickness of lead in grams per square centimeter (-1m in g/cm²) is approximately 0.624 g/cm².

learn more about lead here

https://brainly.com/question/6529765

#SPJ11

Answer:

Explanation:

Here, we want to balance the given equation in acidic conditions

We start by breaking the equation into half equations

We have that as:

The next step is to balance other elements aside from oxygen and hydrogen

This is already done

The next step is to balance oxygen by adding H2O:

The next step is to balance hydrogen by adding the hydrogen ion

We have that as:

The next step here is to balance the excess ions by adding electrons:

Now, we need to cancel out the electrons.

We multiply equation ii by 4:

Now, let us merge the two equations:

Hope you could get an idea from here.

Doubt clarification - use comment section.

Evaporation. ( Evaporation is a type of evaporation that occurs at the surface of a liquid as it transitions to the gas phase. )

What are two types of evaporation?

There are two types of evaporation:

evaporation and boiling. Evaporation is a surface phenomenon and occurs only at the phase boundary between the liquid and gas phases. Atoms or molecules on the surface gain energy from the environment, overcome the attraction of other molecules, and evaporate.

How does the temperature affect evaporation?

Water evaporates at low temperatures, but it evaporates faster as the temperature rises. This makes sense. This is because more molecules move faster at higher temperatures. Therefore, the molecule is more likely to have enough energy to leave the liquid and become a gas.

To know more about Evaporation visit here:

https://brainly.com/question/936799

#SPJ1

Answer:

Uranus and neptune

Explanation:

Answer:

B, Neptune and Uranus

Explanation:

The “ice giants” Uranus and Neptune are made primarily of heavier stuff, probably the next most abundant elements in the Sun – oxygen, carbon, nitrogen, and sulfur. For each giant planet the core is the “seed” around which it accreted nebular gas.

Rotation refers to the movement of an object rotating around its own axis. Rotation refers to the orbital motion of an object around another object.

When the earth rotates it moves or revolves around the sun. The Earth's orbit around the Sun is called an orbit. It takes one year or 365 1/4 days for the Earth to make a complete orbit around the Sun. The moon revolves around the earth as the earth revolves around the sun. This is because the earth accelerates and decelerates as it orbits the sun.

Most of the apparent motion of the Sun comes from the Earth's rotation. As our planet rotates, the sun, moon, and all the stars appear to move from east to west, as if they were spinning in an office chair, while the walls all move in the opposite direction. It looks like you are. It is important to understand the difference between twists and turns. Rotating an object around its internal axis is called rotation. When an object orbits its outer axis it is called rotation.

Learn more about Rotation here:-https://brainly.com/question/26249005

#SPJ1

The percent by mass of each element in \(HClO_{3}\) is approximately:

Hydrogen (H): 1.05%, Chlorine (Cl): 36.75%, Oxygen (O): 31.20%

What is mass?

To calculate the percent by mass of each element in the compound \(HClO_{3}\) , we need to determine the molar mass of the compound and the molar mass of each element present in the compound.

The molar mass of \(HClO_{3}\) can be calculated as follows:

Molar mass of H = 1.01 g/mol

Molar mass of Cl = 35.45 g/mol

Molar mass of O = 16.00 g/mol

Molar mass of  \(HClO_{3}\) = (1 x 1.01) + (1 x 35.45) + (3 x 16.00) = 96.46 g/mol

Therefore, the percent by mass of each element in \(HClO_{3}\) is as follows:

Percent by mass of H = (mass of H / molar mass of  \(HClO_{3}\) ) x 100%

= (1.01 g / 96.46 g) x 100%

= 1.05%

Percent by mass of Cl = (mass of Cl / molar mass of \(HClO_{3}\) ) x 100%

= (35.45 g / 96.46 g) x 100%

= 36.75%

Percent by mass of O = (mass of O / molar mass of \(HClO_{3}\) ) x 100%

= (3 x 16.00 g / 96.46 g) x 100%

= 31.20%

Therefore, the percent by mass of each element in \(HClO_{3}\) is approximately:

To know more about molar mass, visit:

https://brainly.com/question/31545539

#SPJ1

The correct order of decreasing acid strength for the acids lactic acid (LA), oxalic acid (OA), and malic acid (MA) is option B: LA > MA > OA.

The acid strength of an acid is determined by its tendency to donate a proton (H+ ion). The pKa value is a measure of the acidity of an acid, with lower pKa values indicating stronger acids.

In this case, the given pKa values for lactic acid (LA), oxalic acid (OA), and malic acid (MA) are LA = 3.88, OA = 1.23, and MA = 3.40.

Comparing the pKa values, we see that OA has the lowest pKa value (1.23), indicating that it is the strongest acid among the three. LA has a higher pKa value (3.88), making it weaker than OA but stronger than MA. Finally, MA has the highest pKa value (3.40), making it the weakest acid among the three.

Therefore, the correct order of decreasing acid strength is LA > MA > OA, as stated in option B.

Learn more about lactic acid here: brainly.com/question/4596922

#SPJ11

The IUPAC nomenclature system is used to systematically name chemical compounds based on their composition and structure. In the case of FeCl3,.

In FeCl3, the iron ion has a charge of +3, which is denoted by the Roman numeral III in parentheses following the element name "iron." This indicates that the iron ion has lost three electrons, resulting in a positive charge of +3.

The second part of the compound name is "chloride," which refers to the chloride ions (Cl-) that are present in the compound.

By combining the names of the elements and indicating the charge on the iron ion, we arrive at the IUPAC name "iron(III) chloride" for FeCl3.

It's worth noting that FeCl3 is also commonly known as ferric chloride in many non-IUPAC naming conventions, which is derived from the Latin name for iron, "ferrum." However, in accordance with IUPAC rules, the systematic name for FeCl3 is iron(III) chloride.

To learn more about  compounds

https://brainly.com/question/29108029

#SPJ11

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume}\\\)

From the question

volume = final volume of water - initial volume of water

volume = 35 - 8 = 27 mL

We have

\(density = \frac{14}{27} \\ = 0.518518...\)

We have the final answer as

Hope this helps you

Let's see that the STP represents the conditions for the temperature of 0°C (273 K) and for the pressure of 1 atm.

We have this initial data and a volume of 3.20 x 10 ^(2) mL. To solve this problem, we need to use the ideal gas formula:

where T is temperature, P is pressure, and V volume. Subindex 1 is the initial data and subindex 2 is the final data.

We want to find the final volume, so clearing for V2 in the formula, we're going to obtain:

And the final step is replacing the data that we have, where the final data is 425.0 K and 3.50 atm (remember that the volume must be in liters, 1 liter is 1000 mL, so 3.20 x 10^2 mL is 0.32 L):

The answer is that the new volume of the sample of helium would be 0.14 L.

Answer:

It is a single replacement (SR) reaction also known as displacement reaction

Explanation:

Here, we want to write the equation of reaction for the single replacement of magnesium and cadmium (II) nitrate

Magnesium ion is higher up than cadmium (ii) ion in the electrochemical series. What this means is that it can displace it from its salt

We have the equation of reaction in words as:

Using their symbols, we have the equation above as:

Answer:

c

Explanation:

Yes, a change in the molality causes the boiling point of a solution to increase. Molality refers to the number of moles of solute present in a kilogram of solvent. It's important to note that when solute particles are added to a solvent, the solution's boiling point increases and the freezing point decreases.

There is a direct relationship between the molality of a solution and its boiling point. When a solute is dissolved in a solvent, the solution's boiling point increases. The solute particles have a greater influence on the solution's properties than the solvent particles, which results in an increase in the solution's boiling point.

The boiling point of a solution is greater than that of the pure solvent due to the presence of a solute. As a result, the boiling point of a solution can be used to determine the solute's molecular weight. The difference between the boiling points of a pure solvent and a solution of the same solvent and solute is proportional to the solute's molality.

To know more about molality visit:

https://brainly.com/question/30640726

#SPJ11

Explanation:

Acids and alkalis both contain ions. Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-. Water is neutral because the number of hydrogen ions is equal to the number of hydroxide ions

Answer:

cids and bases both react with water and a lot of acids and bases are soluble in nature. Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH–).

Explanation:

The molecular formula of of tobacco that composed of C, H, and N, and A 0.005250 g sample of nicotine was combusted, producing 0.014242 g of CO₂ and 0.004083 grams of H₂O = C₁₀H₁₄N₂.

To determine the empirical formula, we have to divide each member of moles by the smallest one.

Number of C atoms = 3.237 x 10⁻⁴ / 0.646 x 10⁻⁴

= 5

Number of H atoms = 4.536 x 10⁻⁴ / 0.646 x 10⁻⁴

= 7

Number of N atoms = 0.646 x 10⁻⁴ / 0.646 x 10⁻⁴

= 1

Hence, the empirical formula = C₅H₇N

Now, determine the empirical formula mass:

Mass of C₅H₇N = (5 x C) + (7 x H) + (N)

= (5 x 12 + (7 x 1.008) + (14.007)

= 81.118 g/mol

Divide the molar mass of he compound by the empirical formula mass.

(160 ± 5 gr/mol) / 81.118 g/mol

≈ 2

Multiply the empirical formula by 2.

So, the molecular formula = C₁₀H₁₄N₂

Learn more about molecular mass here: https://brainly.com/question/30337467

#SPJ1

The value of Δn for the given equation in relation to Kc (equilibrium constant) and Kp is 1.

In the given chemical equation,

Two solid potassium (K) react with two liquid water (H2O) to form two aqueous potassium hydroxide (KOH) and gaseous hydrogen (H2) in an equilibrium process.

The change in the number of moles (δn) for the given reaction is equal to the difference in the total number of moles of the product and reactant side.

According to the chemical equation,

Two solid potassium (K) react with two liquid water (H2O) to form two aqueous potassium hydroxide (KOH) and gaseous hydrogen (H2) in an equilibrium process.

Initially, the total number of moles of reactants = 2 moles of K + 2 moles of H2O= 2 moles of K2 + 1 = 5

Total number of moles of products = 2 moles of KOH + 1 mole of H2= 2 moles of K2 + 1 = 5

Total moles of reactants and products = 10

The number of moles of gaseous products = 1, H2

The number of moles of gaseous reactants = 0

Therefore, δn = (number of moles of gaseous products) - (number of moles of gaseous reactants)= 1 - 0= 1

Therefore, δn for the given chemical equation is 1.

Relating Kp and Kc:Kp and Kc can be related to each other by using the following equation:

Kp = Kc (RT)Δn

Where, R is the gas constant (0.082 L atm/K mol),

T is the temperature, and Δn is the difference in the number of moles of gaseous products and reactants.

Kc for the given chemical equation is given by,

Kc = [KOH]2[H2]1/[K]2[H2O]2

Therefore,Δn = (2 + 1) - (2 + 0) = 3

Now, using the above equation,

we haveKp = Kc (RT)Δn= Kc (RT)3

The above equation relates Kp and Kc. Here, Kp can be determined if Kc and Δn are known and vice versa.

Hence, the value of Δn for the given equation in relation to Kc and Kp is 1.

Learn more about equilibrium constant at: https://brainly.com/question/19340344

#SPJ11

The chemical symbol for the element that makes up most of Earth's core is Fe, which stands for iron. Iron makes up approximately 85% of the Earth's core, with the remainder being nickel and other trace elements.

The high abundance of iron in the Earth's core is responsible for the planet's magnetic field, which is essential for life on Earth as it helps to protect us from harmful solar radiation. The study of the Earth's core and its composition is important for understanding the planet's history and evolution, as well as for predicting future changes in the Earth's magnetic field. The element that makes up most of Earth's core is iron. Its chemical symbol is Fe, which is derived from the Latin word "ferrum." Iron is the primary component of the inner and outer core, accounting for about 85% of its composition. This element plays a vital role in Earth's geophysics, including the generation of the planet's magnetic field.

To know about nickel:

https://brainly.com/question/3039765

#SPJ11