if 1 ml of sample was originally diluted, what would be the final dilution factor of a plate inoculated with 0.1ml of 10^-3 dilution?a. 10^-2b. 10^-3c. 10^-4d. 10^-5

Answer:

Erosion

Explanation:

Answer:

Explanation:

Over time they can break larger rocks into sediments. Rocks break down by the process called weathering. Moving water, wind, and glaciers then carry these pieces from one place to another. This is called erosion

At the transition stage, one form of matter starts getting converted into another form of matter.

Solid, liquid and gas are the three phases in which matter occur in nature. Matter is interconvertible in nature i.e it can be converted from one form to another.

Melting, freezing and evaporation are the three phases of transition.

Liquid water at low temperature freezes to form solid ice. This process is known as freezing. Whereas, liquid water when provided high temperature or heat releases vapours. This process is known as evaporation. Solid ice when brought at room temperature gets converted back into liquid water. This process is known as melting.

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A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. ... A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups.

Answer:

nano3+agcl2

Explanation:

double displacement reaction

Answer:

Any unapposed interaction that will change the motion of an object.

Explanation:

My physics teacher had us write this down last week.

An indication that a chemical reaction occurred would be an increase in the reaction mixture's temperature.

A chemical reaction is a process in which reactants interact chemically and turn into products. For illustration When humans breathe in oxygen, it combines with glucose to create carbon dioxide, water, and energy.

Chemical reaction is the process by which one or more compounds, known as reactants, change into one or more new ones, known as products. Chemical components or compounds make up substances.

Living organisms, such as cells, animals, people, and insects, can evolve, reproduce, and adapt thanks to chemical processes.

Floro antimonic acid, often known as HSbF6, is the strongest super acid known to man. It is created by combining antimony pentafluoride (PFF) and hydrogen fluoride (HF) (SbF5). The strongest super acid known to man is produced by mixing equal amounts of the two acids in a variety of combinations.

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Answer:

Rubidium Sulfide, Rb2S

Explanation:

The name is usually just the first element, and if it's not a polyatomic, then just the second element with -ide at the end. RbS = Rubidium sulfide

Rb has a +1 charge, while S has a -2, which doesn't = 0 in charges, therefore you do a cross motion with the charges

= Rb2S

Answer:

Respiration happens in the cells of plants, animals and humans, mainly inside mitochondria, which are located in a cell's cytoplasm. The energy released during respiration is used by plants to make amino acids, and by animals and humans to contract their muscles to let them move.

Explanation:

The percent yield of the solution is obtained as  94%.

We know that the reaction equation for the problem that we have here can be written as;

Pb(NO3)2(aq) + 2KI(aq) → 2KNO3(aq) + Pbl₂(s)

Number of moles of Pb(NO3)2 = 10.5 g /331 g/mol

= 0.0317 moles

Number of moles of KI =  5.38 g/166 g/mol

= 0.0324 moles

If 1 mole of Pb(NO3)2 reacts with 2 moles of KI

0.0317 moles of Pb(NO3)2 reacts with 0.0317 * 2/1

= 0.0634

Thus KI is the limiting reactant.

Then;

2 moles of KI produces 1 mole of PbI2

0.0324 moles of KI will produce  0.0324 moles * 1 mole/2 moles

= 0.0162 moles of PbI2

Mass of PbI2 produced is;

0.0162 moles  * 461 g/mol

= 7.47 g

Thus percent yield =  7.02 g / 7.47 g * 100/1

= 94%

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Answer:

C: checking your email

Explanation:

I believe that C would be impossible, as you cannot use wireless networks without radio waves

Answer:

A. A new substance

Explanation:

sorry if its wrong if its right your welcome <3

121 mol CH₄

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Organic

Atomic Structure

Step 1: Define

7.31 × 10²⁵ molecules CH₄

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

\(\displaystyle 7.31 \cdot 10^{25} \ molecules \ CH_4(\frac{1 \ mol \ CH_4}{6.022 \cdot 10^{23} \ molecules \ CH_4} ) = 121.388 \ mol \ CH_4\)

Step 4: Check

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

121.388 mol CH₄ ≈ 121 mol CH₄

Answer:

0.83Cal

Explanation:

Given parameters:

   Amount of energy given;

      35J;

 Convert to Cal;

         1 calorie  = 42 joules

         x calories  = 35 joules

   Cross multiply;

         42x = 35

             x = \(\frac{35}{42}\)   = 0.83Cal

To indicate the distance that corresponds to the bond length of the N₂ molecule, we need to know the bond length of the N₂  molecule. The bond length of a molecule refers to the distance between the nuclei of two bonded atoms.

The bond length of N₂  is approximately 109.76 picometers (pm). Therefore, to indicate the bond length of N₂   on the horizontal axis, we can place an X at 109.76 pm.

It's important to note that bond lengths can vary slightly depending on the specific conditions of a given experiment or calculation. However, the bond length of N₂  at standard conditions is well established, and 109.76 pm is a commonly accepted value.

Knowing the bond length of a molecule is important in understanding the nature of the chemical bond between two atoms. The bond length is related to the strength of the bond, with shorter bond lengths indicating stronger bonds. The bond length of N₂ , for example, is relatively short, indicating a strong bond between the two nitrogen atoms.

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a) Solubility (g KHT/L) = (0.950 g KHT) / (0.025 L) = 38 g KHT/L

b) Solubility (mol KHT/L) = (38 g KHT/L) / (188.18 g/mol) = 0.202 mol KHT/L

c) [K+] = [HT-] = 0.202 mol KHT/L

d) Ksp = (0.202)(0.202) = 0.0408

A more detailed explanation of the answer.

a) To calculate the solubility of KHT in g KHT/L of solution, follow these steps:
1. Convert the volume of the solution to liters: 25.00 mL = 0.025 L
2. Calculate the solubility by dividing the mass of KHT by the volume of the solution:
Solubility (g KHT/L) = (0.950 g KHT) / (0.025 L) = 38 g KHT/L

b) To calculate the solubility of KHT in mol KHT/L of solution, follow these steps:
1. Determine the molar mass of KHT (K = 39.10 g/mol, H = 1.01 g/mol, C = 12.01 g/mol, O = 16.00 g/mol):
Molar mass of KHT = K + 2*(C + H + 2*O) = 39.10 + 2*(12.01 + 1.01 + 2*16.00) = 188.18 g/mol
2. Convert the solubility from g KHT/L to mol KHT/L:
Solubility (mol KHT/L) = (38 g KHT/L) / (188.18 g/mol) = 0.202 mol KHT/L

c) To determine [K+] and [HT-] in this solution, follow these steps:
1. Since KHT dissociates into K+ and HT-, the concentrations of K+ and HT- will be equal to the solubility of KHT in mol KHT/L:
[K+] = [HT-] = 0.202 mol KHT/L

As there is a trace of solid present and the reaction is at equilibrium, we can determine the Ksp at this temperature by following these steps:
1. Write the balanced chemical equation for the dissociation of KHT: KHT (s) <-> K+ (aq) + HT- (aq)
2. Write the expression for the Ksp: Ksp = [K+][HT-]
3. Plug in the concentrations calculated earlier: Ksp = (0.202)(0.202) = 0.0408

So, at this temperature (Tp), the Ksp for KHT is 0.0408.

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Answer:

Physical change occur when objects or sub undergo a change that does not change their chemical composition.

Chemical change us a permanent change which occur when a substance combined with another to form a new substances.

Answer:

407.5 g

Explanation:

Hope it helps.

The rate of formation of ammonia is approximately -1.8 x 10⁻² units (per unit time) based on the given rate of disappearance of hydrogen.

The balanced equation for the reaction is:

N₂(g) + 3H₂(g) → 2NH₃(g)

According to the stoichiometry of the reaction, for every 3 moles of hydrogen (H₂) consumed, 2 moles of ammonia (NH₃) are formed.

Given that the rate of disappearance of hydrogen (-2.7 x 10⁻² is negative, indicating its consumption, we can determine the rate of formation of ammonia using the stoichiometric ratio.

Rate of formation of ammonia = (Rate of disappearance of hydrogen) × (2/3)

Rate of formation of ammonia = (-2.7 x 10^(-2)) × (2/3)

Rate of formation of ammonia ≈ -1.8 x 10^(-2) (units depend on the units of the rate given)

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Answer:Papillae contain taste buds that help animals determine whether food is safe to eat.

Explanation:

An element is a substance that cannot be broken down into any other sense. There are about 100 elements, each with its own type of atom.

Everything in the universe carries atoms of at least one or more elements. a chemical element also called an element, is any material that cannot be decomposed into the simpler matter by ordinary chemical processes. Elements are the basic materials of which all matter is composed. Science describes an element as pure stuff made of only 1 type of atom that can not be broken down further into other substances.

An element is the simplest form of a medium. Generally, it cannot be simplified or broken down into smaller particles. An atom is part of an element.

So we can conclude that  An element is a density made up of only one type of atom, all with the same number of protons.

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Answer:

8 and 0

Explanation:

8 and 0 together make 80

Answer:

the one using a heat lamp would be the hottest

Explanation:

the heat lamp would go into the copper penny and copper is a type of metal so the copper would absorb the heat

flashlight gives of light not heat

The one amongst the heat lamp and flashlight that would get the hottest would be:

- Heat Lamp

Thus, 'Heat lamp' is the correct answer.

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Answer: I want to say 1

Explanation:

I think

According to the question the reaction A+B→C+D is exothermic.

Reaction in chemistry is a process in which two or more substances interact to form a new substance. Chemical reactions involve the breaking of chemical bonds and the formation of new bonds. Chemical reactions are essential for the formation and breaking of molecules, and are responsible for the production of energy.

a) The reaction A+B→C+D is exothermic.

b) The AH for the forward reaction is the difference between the enthalpies of the products and the reactants. The AH for the backward reaction is the difference between the enthalpies of the reactants and the products.

c) X would represent the position of the activated complex on the graph.

d) The activation energy for the forward reaction is the difference between the enthalpies of the reactants and the activated complex. The activation energy for the backward reaction is the difference between the enthalpies of the products and the activated complex. The forward reaction is expected to be faster because it has a lower activation energy.

e) On the same set of axes, the graph would show a decrease in the activation energy with the use of a catalyst, resulting in a lower energy barrier and faster reaction rates.

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Answer:

When ions are made of a single atom, such as Li+1, they are called monatomic ions

Explanation:

Any atom or molecule with a net charge, either positive or negative, is known as an ion. An ion consisting of a single atom is a monoatomic ion; an ion consisting of two or more atoms is referred to as a polyatomic ion.

Answer:

Sodium is an alkali metal so it needs to lose an electron to fill it's outer shell.

That is an ion. When an element loses or gains an electron but in this case, sodium needs to lose an electron.

Answer: Increasing the concentration of a base will cause the pH level of the solution to increase. Increasing the concentration of an acid will cause the pH level of the solution to decrease.

Explanation:

as it breaks down the surface , it reshapes it

The different parts of the chemical equation below are identified as follows:

1. A: Solid

2. B: Liquid

3. C: Gas

4. D: Aqueous

5. (s): Solid

6. (l): Liquid

7. (g): Gas

A chemical equation is a symbolic representation of a chemical reaction where reactants are written on the left side and products on the right side. These reactants and products are identified with their respective states such as solid, liquid, gas, and aqueous.

The symbols for the physical states of the reactants and products are included in parentheses, alongside their respective chemical formulas.

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