Conduct research to learn more about
the relative sizes, or atomic radii, of atoms. Find out how scientists define this
property, and identify specific examples

Answer:

448

Explanation:

K =273+°c

K=273+175

K=448

The best description of cis-trans isomers is that they differ in their spatial arrangement around inflexible double bonds. Option E is correct.

Specifically, cis-trans isomers are a type of stereoisomers that have the same molecular formula and the same covalent bonds but differ in the spatial arrangement of their atoms due to the inflexibility of a double bond. In cis isomers, the two substituents on each carbon atom are on the same side of the double bond, while in trans isomers, the two substituents on each carbon atom are on opposite sides of the double bond.

This results in different physical and chemical properties for the two isomers. For example, cis and trans isomers of some compounds may have different boiling points, melting points, and reactivities.  Cis-trans isomerism is an important concept in organic chemistry as it affects the properties and behavior of molecules and can have significant implications for their biological activity, environmental fate, and industrial applications. Option E is correct.

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Taking into account the ideal gas law, a mass of 0.00314 grams of H₂ is collected.

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

In this case, you know:

Replacing in the ideal gas law:

0.985526 atm× 0.039 L = n× 0.082 (atm×L)÷(mol×K)× 298 K

Solving:

[0.985526 atm× 0.039 L]÷ [0.082 (atm×L)÷(mol×K)× 298 K]= n

0.00157 moles= n

Considering that the molar mass of H₂ is 2 g/mole, the mass can be calculated as:

mass= number of moles× molar mass

mass= 0.00157 moles× 2 g/mole

mass= 0.00314 grams

Finally, you collected a mass of 0.00314 grams.

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Answer:

I don't know the answers of chemistry if you have an entrance question of maths so I can

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Answer:

3034 degrees

Explanation:

Answer:

The reaction will proceed to the right and produce more products.

Explanation:

The reaction produces heat, so it is exothermic. If you remove heat, the reaction counters that by producing more products and replacing the heat that was lost.

Answer:

B.) Chemical

Explanation:

The energy stored in the bonds between atoms is referred to as chemical energy. I hope this helps! ^-^

Considering the Charles' law, the volume if it is heated up to 57 degrees C will be 3.48 L.

Charles' law establishes the relationship between the volume and the temperature of a gas sample at constant pressure: when the temperature is increased, the volume of the gas also increases and when the temperature is decreased, the volume decreases.

That is, the volume is directly proportional to the temperature of the gas and is expressed mathematically as:

V÷T= k

where

Analyzing an initial state 1 and a final state 2, it is fulfilled:

V₁÷T₁= V₂÷T₂

In this case, you know:

Replacing in Charles' Law:

3.3 L÷ 313 K= V₂÷ 330 K

Solving:

(3.3 L÷ 313 K)× 330 K= V₂

3.48 L= V₂

Finally, the final volume will be 3.48 L.

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Hi there!

Let me know if you have questions about my answer:

6.15 × 10²⁴

Explanation:

To find the number of atoms, divide the mass of calcium (m) by its molar mass (MM). This will give you the number of moles of calcium (n).

\(n = m/MM\)            Start with a formula

\(=\frac{41.0g}{40.08g/mol}\)             Substitute values from the question

\(= \frac{41.0g*1mol}{40.08g}\)             Simplify

\(= \frac{41.0mol}{40.08}\)                 Cancel out the units "g"

\(= 1.022...mol\)          Number of moles of calcium, with 4 significant figures

Then, multiply the number of moles of calcium (n) by Avogadro's number (\(N_{A}\)) to find the number of calcium atoms.

\(Number.of.Ca=n*N_{A}\)      Start with a formula

\(= 1.022mol*\frac{6.022*10^{23}Ca}{1mol}\)      Substitute values from the question

\(= \frac{1.022mol*6.022*10^{23}Ca}{1mol}\)           Simplify

\(= 1.022*(6.022*10^{23}Ca)\)     Cancel out the units "mol"

\(= 6.154*10^{24} Ca\)                   Multiply, leave one extra digit to help round. "4" tells you to round down.

\(= 6.15*10^{24} Ca\)                     Final answer to 3 significant figures*

*When multiplying and dividing numbers, your final answer will have the same number of significant figures as the number with the least number of significant figures in the question.

40.08 has 4 significant figures. 41.0 has 3 significant figures. So, you want 3 significant figures in your final answer.

I hope this helps!

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Explanation:

a. homogeneous equilibrium (all species are in the gas phase)

b. heterogeneous equilibrium (solid carbon is present)

c. heterogeneous equilibrium (solid catalyst may be present)

d. heterogeneous equilibrium (liquid mercury and solid mercury(II) oxide are present)

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:

Energy was gained when the sodium and hydroxide ions formed new bonds with the water.

Explanation:

The other answer choices are incorrect because:

Energy was absorbed when the bonds between sodium and hydroxide ions were broken: This is incorrect because breaking bonds requires energy, so energy is absorbed rather than released.

Energy was released when the sodium and hydroxide ions came together to form NaOH: This is incorrect because the reaction being described is dissolution of NaOH in water, not formation of NaOH from its constituent ions.

Energy was released when the bonds between sodium and hydroxide ions were broken: This is incorrect for the same reason as the first option. Breaking bonds requires energy, so energy is absorbed rather than released.

Answer: this correct answer will be energy was released when the sodium and hydroxide ions formed new bonds with the water.

Explanation:

Answer:

In a lab, a student mixes 25.0 ml of 0.115 M aluminum sulfate with 34.0 ml of 0.0975 M Lead (III) nitrate. Calculate the grams of the precipitate that is formed.

Explanation:

Vinegar pH 3.2: Weak acid

Battery acid pH 0.5: Strong acid

Shampoo pH 7.0: Neutral

Ammonia pH 11.1 Strong base

Half-reaction at the cathode:

part 1.

The half-reaction at the cathode is the reduction of Cu2+ ions to Cu+ ions:

10Cu2+ (aq) + 2e- → 10Cu+ (aq)

part 2.

Half-reaction at the anode:

The half-reaction at the anode is the oxidation of IO3- ions to I2:

2IO3- (aq) → I2 (s) + 6e-

part 3.

The cell voltage under standard conditions is  -0.20 V.

The difference in the electrical potential between two electrodes is described as the cell voltage.

The cell voltage under standard conditions is equal to the difference between the standard reduction potentials of the half-reactions:

Ecell = E°cathode - E°anode

Ecell = 0.34 V - (+0.54 V)

Ecell = -0.20 V

Rounding off to 2 decimal places:

Ecell = -0.20 V

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Photosynthesis is the primary process for which the sun is responsible on earth.

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Answer:

I would serve nothing

Explanation:

thank you bye\

Answer:

Explanation:

I would not serve it because what if Their is some dangerous chemical

Answer:

here's your answer........,.....

melting of wax is a physical reaction, because the same amount of wax exists before and after the change.

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Answer:

A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.

Explanation:

Brainlist

28 mol CaF

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 1.7 × 10²⁵ molecules CaF

[Solve] moles CaF

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

28.2298 mol CaF ≈ 28 mol CaF

question 1 water question 2 instant tea question 3 mixture

The standard cell potential (also known as the standard electrode potential) is a measure of the potential difference between two electrodes in an electrochemical cell under standard state conditions.

(a) Standard Cell Potential for Mg(s) + Ni2+(aq)⟶ Mg2+(aq) + Ni(s):

E0cell = (0.79 - (-0.25))V = 1.04 V.

This reaction is spontaneous under standard state conditions.

(b) Standard Cell Potential for 2Ag+(aq) + Cu(s)⟶ Cu2+(aq) + 2Ag(s):

E0cell = (0.34 - (-0.52))V = 0.86 V.

This reaction is spontaneous under standard state conditions.

(c) Standard Cell Potential for Mn(s) + Sn(NO3)2(aq)⟶ Mn(NO3)2(aq) + Sn(s):

E0cell = (0.15 - (-0.14))V = 0.29 V.

This reaction is spontaneous under standard state conditions.

(d) Standard Cell Potential for 3Fe(NO3)2(aq) + Au(NO3)3(aq)⟶ 3Fe(NO3)3(aq) + Au(s):

E0cell = (1.23 - (-1.50))V = 2.73 V.

This reaction is spontaneous under standard state conditions.

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Answer:

1.17 M

Explanation:

Step 1: Given data

Molar concentration of Li₃PO₄: 0.390 M

Step 2: Write the reaction for the dissociation of Li₃PO₄

Lithium phosphate is a strong electrolyte that dissociates according to the following equation:

Li₃PO₄(aq) ⇒ 3 Li⁺(aq) + PO₄³⁻(aq)

Step 3: Calculate the molar concentration of lithium ions

The molar ratio of Li₃PO₄ to Li⁺ is 1:3. The molar concentration of Li⁺ is 3/1 × 0.390 M = 1.17 M.

Considering the definition of strong electrolyte, the molar concentration of Li⁺ is 1.17 M.

An electrolyte is a substance that, when dissolved in water, gives rise to the formation of ions.

Electrolytes can be weak or strong, depending on whether they are partially or fully ionized or dissociated in aqueous medium.

A strong electrolyte is any substance that, when dissolved in water, exclusively causes the formation of ions with a practically irreversible dissolution reaction. That is, it is a solute that completely dissociates into ions in solution.

Lithium phosphate is a strong electrolyte that dissociates according to the following equation:

Li₃PO₄(aq) ⇒ 3 Li⁺(aq) + PO₄³⁻(aq)

From the balanced equation, you can observed that:

1 mole of Li₃PO₄ produced 3 mole of Li⁺.

Therefore, 0.390 M Li₃PO₄ will produce = 3 × 0.390 = 1.17 M Li²⁺

In summary, the molar concentration of Li⁺ is 1.17 M.

Learn more:

Answer:

40 atm

Explanation:

Boyles law states that the pressure exerted on a gas is inversely proportional to the volume it occupies provided that the temperature is held constant. It is given by:

P ∝ 1/V

PV = constant

P₁V₁ = P₂V₂

Given that V₁ = initial volume = 200 ml, P₁ = initial pressure = 2 atm, V₂ = final  volume = 10 ml, P₂ = final pressure. Hence:

2 atm * 200 ml = P₂ * 10 ml

P₂ = (2 atm * 200 ml) / 10 ml

P₂ = 40 atm

Answer:

Radiocarbon measurement or radiocarbon dating is a method that is used to measure the age of the carbon-based material in living organisms.

Radiocarbon dating is able to estimate age of fossils that are younger than 50,000 years and unable to measure things that died longer than 200,000 years ago because fossils that are too old do not contain carbon or carbon get vanished from too old fossils of organisms. Some of the fossils also get contaminated due to environmental conditions and during teh collection or preservation process.

Thus,  radiocarbon measurement is useless when trying to measure most rocks older than 50,000 years.

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Why is nickel more reactive then copper?

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If we notice in reactivity series of metal, we can observe that the metals which are listed above have more reactivity then those in downwards.

And, if we notice carefully we can see that nickel is above copper, which nickel is more reactive then copper.

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