steric strain occurs when parts of molecules are (1) ____ and their electron clouds (2) ____ each other. molecules with steric strain are (3)_____than those without strain.options answer (select one):(1). -- Spread out. , in different directions. , too close together(2). -- bond to. , attract. , repel(3). -- more stable. , less stable , smaller

Answer:

Ne

Explanation:

Comparing Ne and Na, Neon atoms will have the greatest ionization energy.

The ionization energy is the energy required to remove the most loosely held electrons within an atom.

Answer:

One atom must be much more electronegative than the other.

Answer:

4. The amount of caffeine in the drinks

5. The heart rate of the participants of the experiments

6. Water

7. i) The volume of drink taken should be constant

ii) The frequency of taking their drink is constant

iii) The time of drinking by the brothers is constant

Explanation:

In the question, Jeffery intends to find the caffeine drink that will result in the heart rate increasing most

The variables (varieties) of drinks tested by Jeffery = Pepsi, espresso, and water

Drink variable arranged by the order of increasing Caffeine content are presented as follows;

Caffeine content of water < Caffeine content of Pepsi < Caffeine content of espresso

The triplet with the double shot of espresso = The triplet with the highest heart rate

4. The independent variable is the variable which is suspected to be the cause of the specified observation

Therefore, in the question, the independent variable are the drinks with different amount of caffeine

5. The dependent variable is the effect or the outcome of the independent variable

The dependent variable in the question is the heart rate of the subjects in the study

6. The control group is the independent variable or input that is expected to give the minimum effect or output compared to other independent variables in the study such that the control group does not contain the suspected cause of the observation or effect under investigation

The control group (or variable) in the question is water which does not contain caffeine

7. Three constants that all three brothers should be doing are;

i) The three brothers should be taking a constant or the same quantity of their preferred drink

ii) The frequency at which they take their drinks should be constant

iii) The time at which the brothers take the drink should be the same

Answer:

62.5 km/hr

Explanation:

Speed can be found by dividing the distance by the time.

s=d/t

We know the car travelled a distance of 125 kilometers in 2 hours. Therefore:

• d=125 km

• t= 2 hr

Substitute the values into the formula.

s= 125 km/ 2 hr

Divide

s= 62.5 km/ hr

The speed of the car is 62.5 kilometers per hour.

(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].

pH = -log(0.0003)

pH ≈ -log(3 × 10⁻⁴)

Using a calculator, we can calculate the logarithm:

pH ≈ -(-3.5229) (rounded to the nearest tenth)

pH ≈ 3.5

Therefore, the pH of the fruit juice solution is approximately 3.5.

(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].

[H⁺] = 10(-pH)

[H⁺] = 10⁻³

[H⁺] = 0.001 mol/L

Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.

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Answer:

detail is given below.

Explanation:

The charged particles of nucleus are protons while neutrons are neutral having no charge.

We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus.

Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.

Symbol of proton= P⁺  

Symbol of neutron= n⁰  

The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.

one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.

While the atomic number is 20.

Answer:

-1

Explanation:

1) The compound is 2-methyl but-2-ene

2) Cyclopentene

3) 2-ethyl but -1-ene

4) 2 - methyl cyclobutene

Find the longest chain of carbon atoms that contains the double bond. This chain is the parent chain and its name is based on the number of carbon atoms it contains.

Number the carbon atoms in the parent chain so that the double bond has the lowest possible number and use the suffix "-ene" to indicate that the compound is an alkene.

If there are substituents on the parent chain, name them and indicate their location using numbers.

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Answer:

electricity

Explanation:

A circuit is used in every electrical and electronics operation.

Here are the answers

\(\\ \tt\hookrightarrow HCl+NaOH\longrightarrow NaCl+H_2O\)

\(\\ \tt\hookrightarrow H_2SO_4+2NaOH\longrightarrow Na_2SO_4+2H_2O\)

\(\\ \tt\hookrightarrow 2HCl+Ba (OH)_2\longrightarrow BaCl_2+2H_2O\)

Pea plants uses the light energy from sun for photosynthesis and they synthesis chemical energy in leaves.

Photosynthesis is a biochemical process taking place in green plants to synthesis energy with the aid of light energy. The green pigments chlorophyll absorbs enough light energy for this biochemical reactions.

The photosynthetic reaction is the reaction between water and carbon dioxide producing glucose and oxygen. Thus, this process intakes carbon dioxide that we exhale and release oxygen that aids our respiration.

Pea plants are green plants undergoing photosynthesis. They uses light energy to produce chemical energy. With the presence of sunlight, they can easily carry photosynthetic reaction in leaves.

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Answer:

Test for the first one is the best for

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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Answer:

Explanation:

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

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

From the question we have

\(density = \frac{2.06}{3.10} \\ = 0.664516..\)

We have the final answer as

Hope this helps you

The parts of an amino acid that are important in the protein buffer system are the amino group (-NH2) and the carboxyl group (-COOH).

These two groups can act as both an acid and a base, allowing them to maintain a stable pH within the body. When the pH level in the body becomes too acidic, the amino group will act as a base and attract hydrogen ions (H+), forming NH3+.

When the pH level becomes too basic, the carboxyl group will act as an acid and release hydrogen ions, forming COO-. This ability to both accept and donate hydrogen ions makes amino acids crucial in regulating pH levels and maintaining proper physiological function.

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A single replacement reaction is a type of chemical reaction that takes place when one element in a compound is replaced by another element. In other words, in this reaction, one element is replaced by another element. There are a few ways to predict whether or not a single replacement reaction will occur.

These ways are explained below: Paying Attention to ReactantsThe first way to predict if a single replacement reaction will occur is by paying attention to the reactants. In a single replacement reaction, a more reactive element will replace a less reactive element. For example, if a metal element is mixed with an aqueous solution that contains ions of another metal, a single replacement reaction will occur if the metal in the solid state is more reactive than the metal in the solution state. For instance, if you put zinc in copper sulfate, a reaction will occur because zinc is more reactive than copper. Therefore, it will replace copper, producing zinc sulfate and copper.Using the Activity SeriesAnother way to predict if a single replacement reaction will occur is by using the activity series. The activity series is a list of metals and their ability to replace other metals from their compounds. This list is arranged in order of decreasing activity. Therefore, if a metal is more active than another metal on the activity series, it will replace that metal from its compound. For example, if you put magnesium in silver nitrate, a reaction will occur because magnesium is more reactive than silver. Therefore, magnesium will replace the silver, producing magnesium nitrate and silver. If the metal is less active than another metal on the activity series, no reaction will occur.Using Electrochemical SeriesThe electrochemical series is another way to predict if a single replacement reaction will occur. The electrochemical series lists the elements in order of their standard reduction potentials. A metal with a higher reduction potential will replace a metal with a lower reduction potential from its compound. For instance, if you put copper in magnesium sulfate, no reaction will occur because copper has a lower reduction potential than magnesium. Therefore, magnesium will not replace copper from its compound.

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Answer:

The volume of stock solution needed to make the solution is 1875 ml

Explanation:

The parameters given are;

The volume of 75 M solution of H₂SO₄ = 400 ml

The concentration of stock solution = 16.0 M

Number moles per liter of stock solution = 16 moles

Number of moles in required 400 ml solution = 0.4×75 = 30 M

Volume of stock solution that contains 30 M = 30/16×1 = 1.875 l

The volume of stock solution that is required = 1875 ml

Answer:

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

..

Answer:

3 × 10¯¹⁰

Explanation:

9×10² ÷ 3×10¹²

The above expression can be simplified as follow:

9×10² ÷ 3×10¹²

Recall:

9 = 3²

9×10² ÷ 3×10¹² = 3²×10² ÷ 3×10¹²

Recall:

a^m ÷ a^n = a^(m – n)

3²×10² ÷ 3×10¹² = 3^(2 – 1) × 10^(2 – 12)

= 3¹ × 10¯¹⁰

Recall:

a¹ = a

3¹ × 10¯¹⁰ = 3 × 10¯¹⁰

Here are the typical sections that you should include in your report:

Title Page - This page should contain the title of your experiment, your name, your instructor's name, and the date the experiment was conducted.

Introduction - In this section, you should provide some background information on pH and why it is important to measure it. You should also state the objectives of the experiment and describe the methodology you used.

Materials and Methods - This section should include a list of all the materials you used in the experiment, as well as a step-by-step description of the procedure you followed to measure pH. Be sure to include any safety precautions you took during the experiment.

Results - In this section, you should present the data you collected during the experiment. You should include tables, graphs, or figures to illustrate your results. You should also provide a written explanation of your findings.

Discussion - In this section, you should interpret your results and explain what they mean in terms of the objectives of the experiment. You should also discuss any sources of error that may have affected your results, and suggest ways to improve the experiment in the future.

Conclusion - In this section, you should summarize your findings and state whether or not your objectives were achieved.

References - This section should include a list of any sources you consulted during the experiment, such as textbooks, journal articles, or websites.

Appendices - This section should include any additional information that is relevant to the experiment but not included in the main body of the report, such as raw data, calculations, or photographs.

When writing your lab report, be sure to follow the formatting and citation guidelines provided by your instructor or department. You may also want to consult a scientific writing guide or other resources to help you write a clear and concise report.

\(\begin{align}\huge\colorbox{black}{\textcolor{yellow}{I hope this helps !}}\end{align}\)

\(\begin{align}\colorbox{purple}{\textcolor{lime}{Please mark as brillinest !}}\end{align}\)

\(\textcolor{cyan}{\small\textit{If you have any further questions, feel free to ask!}}\)

Answer:

57.6g

Explanation:

1u=28.8g

2u=28.8g×2

.....=57.6g

Based on the given information, it is possible that the mineral with the weaker reaction is a feldspar mineral, specifically an orthoclase or plagioclase feldspar.

The weaker reaction of a mineral with dilute hydrochloric acid (HCl) suggests that the mineral is likely composed of a mineral group that is less susceptible to acid dissolution. One such mineral group is the feldspar group.

Feldspar minerals, such as orthoclase and plagioclase, are commonly found in light-colored rocks and have a moderate to weak reaction with dilute HCl. They typically show a faint effervescence or no reaction at all when HCl is applied.

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The equilibrium constant expression for the reaction is (PSiO2)4/(PSi2H6)2(PO2)7. Hence, the correct option is C.

In this expression, the concentrations of the reactants (Si2H6 and O2) are raised to the power of their respective stoichiometric coefficients, and the concentration of the product (SiO2) is raised to the power of its stoichiometric coefficient. The concentration of the liquid product (H2O) is not included in the equilibrium constant expression because it is in the liquid state.

The correct expression for the equilibrium constant (K) for the given reaction is:

C. (PSiO2)4/(PSi2H6)2(PO2)7

Therefore, the equilibrium constant expression for the reaction is (PSiO2)4/(PSi2H6)2(PO2)7.

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Answer:

I know this is very late I am sorry, but

I believe your answer would be C) 4.00 mol.

Correct me if I am wrong.

Explanation:

9040 divided by 2260= 4

0.222 moles of water  released 9040 J of energy.

The heat of vaporization is defined as the heat required to convert 1 g of a substance from liquid to vapor. We are told that the heat of vaporization of water is 2260 J/g.

Hence;

1g of water releases  2260 J of heat

xg of water releases  9040 J of heat

x = 1g ×  9040 J /2260 J

x = 4 g

1 mole of water contains 18 g

x moles of water contains 4 g

x = 1 mole  × 4 g/18 g

x = 0.222 moles

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Answer:

true I just guessed of I'm being honest

Option A ,  Ion-dipole > hydrogen bonding > dipole-dipole > dispersion

Intermolecular forces are the direct interactions that bind liquid or solid molecule together. It is a specific kind of chemical connection that takes place between molecules and is often weaker than intramolecular forces. These intermolecular forces, despite being weaker, govern some of the substances' most crucial characteristics, including boiling temperature, melting point, enthalpy of fusion, vaporization, and density. Ion-dipole > hydrogen bonding > dipole-dipole > dispersionIon-dipole interactions, which are attracted to one other by a persistent dipole, are the strongest intermolecular forces of attraction. Be aware that an ion's charge is more powerful and more persistent than a dipole's. The next step is hydrogen bonding, a unique kind of dipole-dipole interaction that results from the significant difference in electronegativity that permanently separates the charge. The remaining interactions between dipoles are weaker than hydrogen bonds. The London dispersion forces are the weakest intermolecular interactions since the dipoles are merely produced by the arbitrary movement of electrons within the bonds.

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Answer:

Cotten

Explanation:

Natural gas is fossil fuel.