A reaction is 35% complete in 45.0 minutes. How long after its start will the reaction be 85% complete if the reaction is zero order

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Let us look at this equation;

Li2CO3(s) ------->2Li^(aq) + CO3^2-(aq)

We can see that each unit of Li2CO3 has two lithium ions and one carbonate ion.

Let us not forget that Li has a valency of 1 while carbonate ion has a valency of 2. Exchange of valencies gives the final formula of the compound.

Answer:

Two Lithium ions and one carbonate ion

Explanation:

Answer: The mass of \(AlCl_3\) produced is 889.38 g

Explanation:

We are given:

Moles of Al = 8 mol

Moles of \(Cl_2\) = 10 mol

For the given chemical reaction:

\(2Al+3Cl_2\rightarrow 2AlCl_3\)

By stoichiometry of the reaction:

If 3 moles of chlorine gas reacts with 2 moles of Al

So, 10 moles of chlorine gas will react with = \(\frac{2}{3}\times 10=6.67mol\) of Al

As the given amount of Al is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, chlorine gas is considered a limiting reagent because it limits the formation of the product.

By the stoichiometry of the reaction:

If 3 moles of \(Cl_2\) produces 2 mole of \(AlCl_3\)

So, 10 moles of \(Cl_2\) will produce = \(\frac{2}{3}\times 10=6.67mol\) of \(AlCl_3\)

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)

We know, molar mass of \(AlCl_3\) = 133.34 g/mol

Putting values in above equation, we get:

\(\text{Mass of }AlCl_3=(6.67mol\times 133.34g/mol)=889.38g\)

Hence, the mass of \(AlCl_3\) produced is 889.38 g

Concentration - 3

Phase - 1

Catalyst - 4

Surface area - 2

The splitting of large nuclei method is representative of a fission reaction. Thus, option A is the answer.

Fission reaction refers to a type of nuclear reaction in which the nucleus of an atom is split into two or smaller nuclei, along with the release of a large amount of energy. This process can occur naturally but is also commonly induced in nuclear reactors and weapons.

In a fission reaction, the nucleus of an atom, typically a heavy element such as uranium or plutonium, is bombarded with neutrons. This causes the nucleus to become unstable and split into two or smaller nuclei, as well as several neutrons. These neutrons can then go on to initiate additional fission reactions, leading to a chain reaction and the release of a significant amount of energy in the form of heat and radiation.

Fission reactions are the basis for the operation of nuclear reactors, where the heat generated by the chain reaction is used to produce electricity. However, they are also the source of the energy released by nuclear weapons. Fission reactions can be highly destructive, producing massive explosions and long-term environmental damage from the radiation released.

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In the box on a periodic table  we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.

By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.

The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.

Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.

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The Ksp (solubility product constant) for PbBr2 at the given temperature is approximately 4.7 x 10^-6.

The solubility product constant (Ksp) is a measure of the extent to which a sparingly soluble salt dissociates into its ions in a solution. For the compound PbBr2, the equilibrium equation is:

PbBr2(s) ⇌ Pb2+(aq) + 2Br-(aq)

The Ksp expression for this equilibrium is:

Ksp = [Pb2+][Br-]²

Given that the molar solubility of PbBr2 is 2.17 x 10^-3 M, we can assume that the concentration of Pb2+ and Br- ions in the saturated solution is equal to the solubility value.

Thus, [Pb2+] = 2.17 x 10^-3 M and [Br-] = 2 x (2.17 x 10^-3 M) = 4.34 x 10^-3 M (since the stoichiometry of PbBr2 is 1:2).

Plugging these values into the Ksp expression:

Ksp = (2.17 x 10^-3 M) * (4.34 x 10^-3 M)²

≈ 4.7 x 10^-6

Therefore, the Ksp for PbBr2 at the given temperature is approximately 4.7 x 10^-6.

The Ksp for PbBr2 at the given temperature is approximately 4.7 x 10^-6. This value represents the equilibrium constant for the dissociation of PbBr2 into its constituent ions, Pb2+ and Br-, in a saturated solution.

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Answer:

glamorize

Explanation:

There are many stories about celebrities being on drugs, and the media seems to deliver the stories in a way that acts as drugs are beneficial and further glamorizes them.

News coverage tends to glamorize drug use.

An examination performed by the national middle on addiction and Substance Abuse at Columbia college discovered that young adults who frequently use popular social media outlets have been more likely to drink, use pills, and buy tobacco than adolescents who both did no longer use social media or used it less regularly.

The effects display that the media impact on the human populace cannot exchange the stabilities of equilibria however can affect the number of drug addicts. Sensitivity analyses are performed to search for powerful control measures for drug treatment.

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When pouring from a stock solution bottle, it is generally recommended to hold onto the bottle by grasping the body of the bottle itself. Here's a detailed explanation: Stability, Spillage Prevention, Accurate Pourin

Stability: Holding the bottle by its body provides better stability and control over the pouring process. The body of the bottle is usually designed to provide a firm grip, allowing you to have better control over the pouring angle and flow rate.

Spillage Prevention: Holding the bottle by its body helps minimize the risk of spilling or tipping the bottle. The body of the bottle is typically wider and more stable compared to the neck or cap. By holding onto the body, you can maintain a better balance and reduce the likelihood of accidental spills.

Accurate Pouring: Holding the bottle by the body allows you to have a clearer view of the pouring spout or opening. This visibility helps ensure that you can accurately aim and control the pouring of the stock solution without splashing or wasting the liquid.

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The KK for the oxidation of zinc by hydrogen ions at 25 °C is -1.23 V.  

The standard reduction potentials for the half-reactions involved in the oxidation of zinc by hydrogen ions can be used to calculate the Nernst constant (KK) for the reaction at a given temperature using the following equation:

KK = \(e^{(-E/RT)} / [1 + e^{(-E/RT)]\)

The standard reduction potential for the half-reaction \(Zn(s)+2H+(aq) == Zn_2+(aq)+H_2(g) is -0.76 V.\)

The standard reduction potential for the half-reaction :\(Zn(s)+2H+(aq) == Zn_2+(aq)+H_2(g) is -0.76 V.\)

The standard reduction potential for the half-reaction H(g)+4e-→2H*(-2) is -2.44 V.

Using the tabulated electrode potentials, we can find the standard reduction potential for the half-reaction:\(Zn(s)+2H+(aq) == Zn_2+(aq)+H_2(g) is -0.76 V.\)

Standard reduction potential (E°) = -0.76 V

Standard reduction potential (E°) = -0.76 V

The standard reduction potential for the half-reaction:\(Zn(s)+2H+(aq) == Zn_2+(aq)+H_2(g) is -0.76 V.\)

Standard reduction potential (E°) = -2.44 V

Using the equation for KK, we can calculate the KK for the oxidation of zinc by hydrogen ions at 25 °C:

KK = \(e^{(-E/RT)} / [1 + e^{(-E/RT)]\)

\(KK = e^{(-(-0.76 V)/(298 K * 1 atm)) }/ [1 + e^{(-(-0.76 V)/(298 K * 1 atm))]\\KK = e^{(-0.76 V)}/(1.105 + e^{(-0.76 V))\)

KK = -1.23 V

Therefore, the KK for the oxidation of zinc by hydrogen ions at 25 °C is -1.23 V.  

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The mass of iron which is needed to react with 16.0 grams of sulphur is 28 grams

How to balanced the given equation?

The balanced chemical equation for the reaction between iron and sulfur  to form iron sulfide is:

8 Fe + S₈ → 8 FeS

From the balanced chemical equation, we can see that 8 moles of Fe react with 1 mole of S₈ to form 8 moles of FeS.

To determine the mass of iron required to react with 16 grams of sulfur, we first need to calculate the number of moles of sulfur present in 16 grams of S.

The molar mass of S is 32.06 g/mol (the atomic mass of S is 32.06). Therefore, the number of moles of S in 16 grams is:

n(S) = m(S) / M(S) = 16 g / 32.06 g/mol = 0.499 mol

The molar mass of 8 moles of iron will be 448 grams

∴56 × 8 = 448 grams

Similarly the molar mass of S₈ will be 256 grams

∴32 × 8 = 256 grams

Therefore,

256gram of Sulphur needs 448 gram of Iron

So 16 gram of sulphur will  ?

cross multiply

The mass of Iron needed =( 16 × 448) ÷256

= 7168 ÷ 256

Hence by solving the above equation we can find the mass of iron which is 28 grams

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This one is from G_oogle

The Milkmaid and Her Pail

A farmer's daughter had been out to milk the cows, and was returning to the dairy carrying her pail of milk upon her head. As she walked along, she fell a-musing after this fashion: "The milk in this pail will provide me with cream, which I will make into butter and take to market to sell. With the money I will buy a number of eggs, and these, when hatched, will produce chickens, and by and by I shall have quite a large poultry-yard. Then I shall sell some of my fowls, and with the money which they will bring in I will buy myself a new gown, which I shall wear when I go to the fair; and all the young fellows will admire it, and come and make love to me, but I shall toss my head and have nothing to say to them." Forgetting all about the pail, and suiting the action to the word, she tossed her head. Down went the pail, all the milk was spilled, and all her fine castles in the air vanished in a moment!

- Do not count your chickens before they are hatched.

I tried to make my own but it turned out bad...

Hope this helps ❤️

Explanation:

2H2+O2------->2H2O

its yr balanced equation.

hope it helps

Answer:

Explanation:

Distillation is a separation technique used to separate constituents of a mixture based on difference in there boiling points. Constituents of crude oil are also separated based on there boiling points. When the crude oil is heated above 250°C, diesel oil, gas oil, mineral oils, fuel oil, waxes and tars will be left in the mixture while constituents such as kerosene, fuel gas and petrol would have been separated/distilled out.

Answer: right here

Explanation:

A compound is a substance made up of a definite proportion of two or more elements. A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

Answer:

Explanation: First one is Purple, purple, White.

Hairy, Hairy, Non hairy.

Answer:

Any dominant trait (capital letter) will dominate the recessive trait (lowercase letter)

Explanation:

Any letter combo with the dominant trait will have that dominant trait. The only time the recessive trait will come through is if it is a double lowercase letter. Ex. PP=purple flower Pp= Purple flower and pp= white flower

Answer:

6,570,000

Rounded to 3 significant figures. The figures therefore are 6, 5, 7

An enzyme that transfers a phosphate moiety in a reaction is called a "kinase." The most common source of phosphate for biochemical reactions is "adenosine triphosphate (ATP)."

The most common source of phosphate for biochemical reactions is adenosine triphosphate (ATP), which is composed of adenosine and three phosphate groups. ATP is the primary energy source for many metabolic processes, as the phosphate groups can be readily transferred in different directions, thus releasing energy. During this transfer, the bond between the two phosphate groups is broken and the remaining phosphate group is transferred to another molecule, resulting in the formation of adenosine diphosphate (ADP) and a new compound that contains the phosphate group. Other sources of phosphate for biochemical reactions include phosphoenolpyruvate (PEP) and guanosine triphosphate (GTP).

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The major products formed when benzene reacts with the following reagents are :

(a) tert-butylbenzene

(b) bromobenzene

(c) mixture (ortho-nitrobenzene, meta-nitrobenzene, para-nitrobenzene)

(d) benzaldehyde

(e) nitrobenzene

(a) The major product formed when benzene reacts with tert-butyl bromide and \(AlCl_3\) is tert-butylbenzene.

(b) The major product formed when benzene reacts with bromine and a nail (iron) is bromobenzene.

(c) The major product formed when benzene reacts with iodine and \(HNO_3\) is a mixture of ortho-nitrobenzene, meta-nitrobenzene, and para-nitrobenzene.

(d) The major product formed when benzene reacts with carbon monoxide, HCl, and \(AlCl_3\)/CuCl is benzaldehyde.

(e) The major product formed when benzene reacts with nitric acid and sulfuric acid is nitrobenzene.

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Answer:

3

Explanation:

The balanced chemical equation is as follows:

4KClO₃ ₍s₎ ⇒ 3KClO₄ ₍s₎ + 3KCl

The term balanced chemical equation is defined an equation where the number of atoms of each type in the reaction is the equal on both reactants and product sides.

The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.

Thus, The balanced chemical equation is as follows:

4KClO₃ ₍s₎ ⇒ 3KClO₄ ₍s₎ + 3KCl

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Answer:

B, Pure substance

Explanation:

Water, is a pure substance, a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water.

Active series ions with the highest reactivity among metals.

The simplicity of chemical reactions is the main difference between metals. The most active metals in terms of reactivity are those in the lower left corner of the periodic table. For example, water reacts with lithium, sodium and potassium. However, as you move down this pillar, the more metallic the elements become, the more reactive they become, thus accelerating the rate of this reaction.

The order in which metals are arranged in descending order of reactivity is called the reaction sequence or activity sequence of metals.

The list of active or electromotive series metals is arranged in order of increasing reactivity with hydrogen ion sources such as water and acids.

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Answer:

6 Cl atoms

Explanation:

In one molecule of ZnCl2, we have 2 atoms of Cl

Therefore, in 3 molecules of ZnCl2, we'll have 3(2) atoms of Cl = 6 atoms of Cl.

please mark brainliest

Answer:

it's because the liquid in the bottle is supercooled

Answer:

true

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

Lactose contains sugar and glucose, which is found in lactose, glucose will be formed when coffee is added to milk and then lactose is added to the coffee and milk combination.

Because milk contains calcium, it is white in colour and contains the known sugars lactose and glucose. Lactose, a type of sugar present in milk, turns into glucose when combined with coffee.

Farmers dry the brownish bean-shaped coffee seed, which is then ground into a fine powder and combined with milk and sugar to make coffee. In general, Brazil and other nations are where you may find coffee.

Because lactose contains sugar and glucose, when coffee is added to milk and then lactose is added to the coffee and milk solution, glucose will be created.

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4.70 × 10²⁴ atoms Ge

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

7.80 mol Ge

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

\(\displaystyle 7.80 \ mol \ Ge(\frac{6.022 \cdot 10^{23} \ atoms \ Ge}{1 \ mol \ Ge} )\) = 4.69716 × 10²⁴ atoms Ge

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.69716 × 10²⁴ atoms Ge ≈ 4.70 × 10²⁴ atoms Ge

Answer:

The main problem with Bohr's model is that it works very well for atoms with only one electron, like H or He+, but not at all for multi-electron atoms

Explanation:

Owelle disapprove of the Bohr model because it was primarily for the hydrogen atoms. It couldn't elaborate on spectra of multi-electron atoms.

An electron is a negatively charged subatomic particle.

The main problem with Bohr's model is that it works very well for atoms with only one electron, like H or \(He^+\), but not at all for multi-electron atoms

Hence, Owelle disapproves of the Bohr model.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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