1 point
Your friend over in England that had the TV from last test now wants to
send you 3.87x10^23 atoms of gold in exchange for your 3.87g of Au.
Indicate which sample has more gold, your or your friends sample? *
Your Sample
Friends Sample
1 point
How much does your friend's sample of gold from the previous question
weigh? *
Your answer

Answer:

Final Temp = 23.92°C

Explanation:

ΔH(total) = (m·c·ΔT)ice + (m·ΔH(f))melt'g + (m·c·ΔT)water

2182.5j = (5g)(2.092j/g·°C)(1°C) + (5g)(334.56j/g) + (5g)(4.184j/g·°C)(ΔT)

(2182.5 - 10.46 - 1672.8)j = 20.92j/°C·ΔT

ΔT = (2182.5 - 10.46 - 1672.8)j / 20.92j/°C = 23.92°C

Since the melting ice starts and ends at 0°C and is then warmed to 23.92°C then the temperature change is also the final temp of the water based upon given energy input values.

Answer:

Strong Electrolyte

Explanation:

Electrolytes are classified into strong and weak electrolytes. Strong electrolytes are electrolytes that completely dissociate in an aqueous solution and are as well good conductors of electricity while weak electrolytes are those that are not completely dissociated in an aqueous solution and are not very good conductors of electricity.

Examples of strong electrolytes are strong acid, strong base, and salts. Examples of weak Electrolyte are weak acids and weak bases.

Thus the correct answer is strong electrolytes.

Answer:

The outer layer of fabric does get hotter because the black color absorbs more heat. And that heat doesn't get transmitted to the skin because of the thick fabric. But thin black clothing transmits that heat to the skin, making a person hotter.

Explanation:

Answer: volume decreases

Answer:

D

Explanation:

the correct answer is D

Answer:

1 atom only with the unit u.

Explanation:

The formula mass of a substance is defined as the sum of the atomic masses of all atoms in a formula unit of the particular substance in question.

Thus the correct answer is option A

Answer:

−7.389056fo3+5.436564f

−l2o3+2l

Explanation:

2al+f(2.7182822)o3=al2o3+2f(2.718282)

Step 1: Add -al^2o^3 to both sides.

7.389056fo3+2al+−al2o3=al2o3+5.436564f+−al2o3

−al2o3+7.389056fo3+2al=5.436564f

Step 2: Add -7.389056fo^3 to both sides.

−al2o3+7.389056fo3+2al+−7.389056fo3=5.436564f+−7.389056fo3

−al2o3+0fo3+2al=−7.389056fo3+5.436564f

Step 3: Factor out variable a.

a(−l2o3+2l)=−7.389056fo3+5.436564f

Step 4: Divide both sides by -l^2o^3+2l.

a(−l2o3+2l)

−l2o3+2l

=

−7.389056fo3+5.436564f

−l2o3+2l

a=

−7.389056fo3+5.436564f

−l2o3+2l

Explanation:

f, br, b, A1, CA, na in order of increasing electronegativity

Answer:

0.0308 mol

Explanation:

In order to convert from grams of any given substance to moles, we need to use its molar mass:

Now we calculate the number of moles of KAI(SO₂)₂ contained in 5.98 g:

Answer:

better mileage on cars, took lead out of paint, smaller packaging like for delivery and store products, EPA laws updating

Answer:

Reducing pollution from transportation sources has led to healthier air for Americans. In cities, smog has been visibly reduced.

Explanation:

i hope this helped

Answer:

29565 feet

Explanation:

multiply 5.6 by 5280

We first set about determining the empirical formula of the compound. From the principle of mass conservation, we can assume that the empirical compound contains 4.04 g of N and 11.46 g of O.

We now convert the mass of each element into the number of moles by dividing by the molar mass.

(4.04 g N)/(14.0067 g/mol) = 0.2884 mol N

(11.46 g O)/(15.999 g/mol) = 0.7163 mol O.

To find the empirical formula, we divide each molar quantity by the smaller of the two. That would be the number of moles of nitrogen.

(0.2884)/(0.2884) = 1

(0.7164)/(0.2884) = 2.48 ≈ 2.5.

To make both whole numbers, we multiply each numeral by 2:

(1)(2) = 2

(2.5)(2) = 5.

So, the empirical formula of our compound is N₂O₅.

To find the molecular formula of our compound, we must find the factor by which the molar mass of the actual compound differs from the molar mass of the empirical compound. The molar mass of the empirical compound, N₂O₅, is 108.01 g/mol. We are told that the molar mass of the actual compound is 216.0 g/mol. So, the two differ by a factor of (216.0 g/mol)/(108.01 g/mol) = 1.99 ≈ 2.

The molecular formula of this compound is thus N₂ₓ₂O₅ₓ₂ or N₄O₁₀.

Answer: Composition is an orderly arrangement of visual structures (elements and principles) to create a mood, add meaning and direct the viewers' attention to the purpose of the artwork. Compositions are said to be 'designed' according to the specific intent of the artist.

The statement that describes the Arrhenius interpretation of acids and bases is that it is limited to situations that involve aqueous solutions or specific compounds. Therefore, option D is correct.

Arrhenius's interpretation defined an acid as a substance that increases the concentration of hydrogen ions (H⁺) when dissolved in water and a base as a substance that increases the concentration of hydroxide ions (OH⁻) when dissolved in water.

According to Arrhenius's interpretation, when an acid is dissolved in water, it releases H⁺ ions, which then react with water molecules to form H₃O⁺ ions, also known as hydronium ions.

Similarly, when a base is dissolved in water, it releases OH⁻ ions, which then react with water molecules to form H₂O molecules and more OH⁻ ions. Thus, option D is correct.

Learn more about Arrhenius, here:

https://brainly.com/question/15196401

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Answer:

.

Explanation:

Answer: We must use 5 moles of [tex]Fe_2O_3[/tex]

8.19 moles of oxygen are needed

Explanation:

The balanced chemical reaction is:

[tex]Fe_2O_3(s)+3CO(g)\rightarrow 2Fe(l)+3CO_2(g)[/tex]

As is the limiting reagent as it limits the formation of product and is the excess reagent.

According to stoichiometry :

2 moles of require = 1 mole of

Thus 10 moles of [tex]Fe[/tex] will require=[tex]\frac{1}{2}\times 10=5moles[/tex]  of [tex]Fe_2O_3[/tex]

 Thus we must use 5 moles of [tex]Fe_2O_3[/tex]

The balanced chemical reaction is:

According to stoichiometry :

2 moles of require = 3 mole of [tex]O_2[/tex]

Thus 5.46 moles of [tex]Fe_2O_3[/tex] will require=[tex]\frac{3}{2}\times 5.46=8.19moles[/tex]

8.19 moles of oxygen are needed

Answer:

D

Explanation:

Kicking the soccer muscles uses the foot muscle that is applied by mechanical force. The ball moves along the ground as the kick removes the friction.

Friction is a resisting force that is encountered by an object or the surface when it moves along another surface. It occurs because the objector the surface slides against each other.

When the kick is applied to a ball lying on the surface then, the frictional force present between the ground and the ball is reduced so that the ball moves along.

Therefore, option D. the kick reduces or removes the frictional force.

Learn more about friction here:

https://brainly.com/question/23095978

Answer:

ot

Explanation:

there is no choices

Answer:

Advertise

Explanation:

once a product is ready to be sold, engineers explain their ideas to marketing people, who will advertise the product.

While metallic bonds have the strong electrostatic force of attractions between the cation or atoms and the delocalized electrons in the geometrical arrangement of the two metals. ... Metallic bonds are malleable and ductile, while covalent bonds and ionic bonds non-malleable and non-ductile.

Answer:

Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical properties.

Answer:

Isotopes are two or more types of atoms with the same atomic number but differing nucleon numbers due to varying numbers of neutrons in their nuclei.

OAmalOHopeO

Answer:

Iodide ion, I- will form the weakest bond with sodium ion, Na+

Explanation:

Electronegativity is the ability with which a neutral atom attracts electrons to itself.

The electronegativity of the halogens decrease on going down the group among the halogens. This is is because on going down the group, the atomic size as well as ionic size of the atoms in the group increases. This increase decreases the effect of the attraction of the positive nucleus on the electrons. Thus, valence electrons can be more readily removed.

The transfer of electrons from metallic sodiummto a halogen results in annionic bond between the two atoms. The strength of the ionic bond decreases on going down the group due to decrease in electronegativity. Thus, iodide ion, I-, which is the least electronegative among the given options will form the weakest bond with Na+.

Answer:

Answer without us!

Explanation:

You seem pretty smart and you can achieve anything!

Answer:

0.2763M NaOH

Explanation:

Based on the reaction of hydrogen phtalate, KHP, with sodium hydroxide, NaOH:

KHP + NaOH → KNaP + H₂O

1 mole of KHP reacts per mole of NaOH.

In the equivalence point, the moles of NaOH added = Moles of KHP that were dissolved.

Thus, to solve this question, we must find the moles of KHP = Moles NaOH. With the moles and the volume of NaOH required to reach the equivalence point we can find molarity of NaOH solution:

Moles KHP = Moles NaOH (Molar mass KHP = 204.22g/mol):

1.518g * (1mol / 204.22g) = 7.433x10⁻³ moles NaOH

In 26.90mL = 0.0269L:

7.433x10⁻³ moles NaOH / 0.02690L

Answer:

6250

Explanation:

so m=500 and v=5

so v²=25

using the equation we can do 1/2 x 500 x 25 = 6250

Answer:

The SI base unit for amount of substance is the mole. 1 grams Ba(NO3)2 is equal to 0.0038264798528183 mole.

Explanation:

Answer: the awnser is A

Explanation:

Edge 2020

Answer:

how far an object moves in a certain amount of time

Explanation:

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Answer: Animal fibre

I hope this helped!

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- Zack Slocum

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Answer:  c) Animal

Explanation:  It is a protein based fibre so classified as animal fibre.  Vegetable fibers are cellulose based.

Answer:

Molar mass of H2CO3 : 62.03 g/mol

Answer:

Advantages of Nonrenewable Energy. Less Initial Capital to Install. Consistency. Extraction and Storage. Reliable and Dependable.

Disadvantages of Nonrenewable Energy. Unfriendly to the Environment. Nonrenewable. They Are Unsustainable. Prone to Cause Accidents. The Spread of Weaponizable Materials  

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