Eddie experimented to find out which freezes at a lower temperature, distilled water or salt water. The steps he used in his experiment are shown below.

1Fill one beaker with 250 mL of room-temperature distilled water

2Fill another beaker with 250 mL of room-temperature salt water

3Measure the mass of the liquid in both beakers

4Place both beakers in a freezer

Observe the temperature at which the liquids freeze

Which of the steps in Eddie's experiment was NOT needed?
A.4
B.2
C.3
D.1

Answer:

May be its correct bro

Explanation:

take it easy

Answer:

In classical soil science, humus is the fraction of soil organic matter that is amorphous and without the "cellular cake structure characteristic of plants

Explanation:

anyways were r we going 2 talk?

and wut did i miss?

Answer:

62.7 gram

Explanation:

Molar mass = (6)(12)+(10)(1)+(1)(32)=114 g/mol

Mass = no of moles × molar mass

= 0.55 × 114 = 62.7 gram

The mass of 0.55 moles of compound C₆H₁₀S is equal to 62.7 g.

A mole is defined as a standard unit that is used to find a huge number of quantities such as atoms, molecules, ions, or other particles. The mass of the 1 mole of any chemical element is equal to the atomic mass of the element and that of any chemical compound is known as molar mass.

The number of entities in 1 mole was found to be equal to 6.023 × 10²³ which is known as Avogadro’s number or Avogadro's constant

Given, the number of moles of the given compound = 0.55 moles

The mass of 1 mole of given compound C₆H₁₀S  = 114 g/mol

The mass of 0.350 moles of the given compound = 0.55 × 114 = 62.7 g

Therefore, 62.7 grams is the mass of 0.55 moles of C₆H₁₀S.

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The solution for the arithmetic problems are​ is mathematically given as

23.27-72.058=-48.79

0.0853+0.05477+0.0002=0.14

35/0.0622=562.7

3400*0.00800=27.2

(43.1+27.250)*(22.514-18.0)​=317.56

Question Parameter(s):

23.27-72.058

0.0853+0.05477+0.0002

35/0.0622

3400*0.00800

(43.1+27.250)*(22.514-18.0)​

Generally,

23.27-72.058=-48.79

0.0853+0.05477+0.0002=0.14

35/0.0622=562.7

3400*0.00800=27.2

(43.1+27.250)*(22.514-18.0)​=317.56

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Answer:

i think it would be

Explanation:

What is the unit rate of the better deal? (Number answers only.)

LaTeX: \frac{160\:miles}{5\:gallons}\:or\:\frac{315\:miles}{9\:gallons}160 m i l e s 5 g a l l o n s o r 315 m i l e s 9 g a l l o n s

The better deal has a unit rate of [m] miles per gallon.

Answer:

Air at sea level

Explanation:

sry If Im wrong

Answer:

Nitrogen is the answer my good sir.

Explanation:

Answer:

I say.... C.

Explanation:

Ionic compounds dissolve in water if the energy given off when the ions interact with water molecules compensates for the energy needed to break the ionic bonds in the solid and the energy required to separate the water molecules so that the ions can be inserted into solution.

Hope it helps!~ (Sorry if you get it wrong or I got it wrong-)

~The Confuzzeled homan

Reproduction is an energy requiring process as new organisms are produced from parents.

Reproduction is the process by which living organisms produce young ones of their own kind.

Reproduction can either be by;

Reproduction is an energy consuming process.

Energy is required for cell division and for building up new news in the new organism.

Therefore, during reproduction, energy is required.

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Answer:

According to mass and volume,  block density is 2 g/ml

Explanation:

Density is a measure, usually used in physics and chemistry, that relates the mass and volume of a solid or compound.

In general terms, the density is directly proportional to the mass, and inversely proportional to the volume, so increasing the mass will also increase the density.

The formula used to calculate the density is

ρ = [tex]\frac{m}{V}[/tex]

Therefore, according to the mass and density of the block

ρ = [tex]\frac{12}{6}[/tex] = 2g/ml

Being the density of the block equal to 2 g/ml.

The other options are not possible, because the values given do not correspond to the result of the equation.

Answer:

32 g

Explanation:

the molar mass of oxygen is 16 g

if it's asking o2 then 64

Answer:

56.6 g Fe2O3

Explanation:

Balanced equation is given by

[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]

On both sides

Hence balanced

Now

Moles of O_2:-

Moles of Fe_2O_3;

Mass of Fe_2O_3:-

Answer:

True

Explanation:

Answer:

Yes

Explanation:

They are produced by heating metal salts eg. Aluminium it is used to produce silver and white flames and sparks.

HOPE IT HELPED

Answer:

Wt. Avg. Atomic Weight => 63.35457 amu

Explanation:

Given              Isotopic             %Abundance     fractional          Wt Avg

                  At. Mass (amu)                                  abundance      contribution                    

Cu-63              62.93                      69.09              0.6909            43.4783

Cu-65              64.9278                  20.0668        0.200668        20.0668

Wt Average of all isotopes = ∑Wt Avg Contributions

=  43.4783 amu + 20.0668 amu = 63.35457 amu

Answer:

A. More mass

C. Shorter distance between them

Explanation:

The two characteristics of a body experiencing greater gravitational force are that they have mass and a shorter distance between them.

This is conformity with Newton's law of universal gravitation.

The law states that "every object attracts one another with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them".

This law implies that the more the mass of two bodies, the more the gravitational force of attraction. And that the shorter the square of the distance between them, the more the attraction.

Answer:

A. More Mass And

C. Shorter Distance Between Them

Explanation:

I Know This Is Already Answered But I'm Ok With It.

The reactants of the reaction will be solid gold (III) sulfide and hydrogen gas, while the products will be pure solid gold and hydrogen sulfide gas.

Reactants react together during reactions to arrive at products.

In this case, solid gold (III) sulfide and hydrogen gas react according to the following equation:

[tex]Au_2S_3(s) + 3 H_2 (g)-- > 2 Au(s) + 3H_2S(g)[/tex]

Reactants = solid gold (III) sulfide, hydrogen gas

Products: pure solid gold, hydrogen sulfide gas

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Explanation:

k

ca

mg

zn

fe

sn

pb

h

cu

hg

ag

pt

au

the answer is calcium or magnesium

because that metal's activity will be higher than al and

lower than Na. so that the metal will be ca or mg.

Answer:

c

Explanation:

carbon dioxide oxygen cycle is basically photosinthesis

photosinthecis is where carbon dioxiode is turned to oxygen

Answer:

The Electron Configuration for Sulfur(S)= 1s^2  2s^2  2p^6  3s^2  3p^4

Explanation:

Use the sheet attached to help with a future question. (Hint: Follow the red lines). The atomic number will be equal to the number of powers raised.

Answer:

you find your bmi by dividing your weight in kg by your height in Meters then square it

this is the formula kg/m2

Explanation:

After series of conversion from one unit to another, the number of gallons was found to be 12 litres

Given Data

Conversion from pounds to Gram

1 kg ---------2.204 lb

x kg ---------184.33 lb

x = 184.33/2.204

x = 83.634 kg

hence the mass in gram = 83.634*1000

mass in gram = 83634 g

Now let us find the volume

We know that density = mass/volume

volume = mass/density

volume = 83634/1.84

volume = 45453.26 cm^3

Convert cm^3 to litres

Volume in litres = 45453.26 /1000

Volume in litres = 45.45 Litres

Convert from Litres to Gallons

1 gallon = 3.79 L

x gallons =  45.45 L

x =  45.45/3.79

x gallons = 11.99 L

Approx = 12 Litres

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Answer:

They are big rocks that fly through space and are made of most commonly chondrite. When they collide, they collide with such force that they create craters on places like the moon.

Answer:

a) there are three transition states

b) there are two intermediates; carbocation and protonated alcohol

c) The first step in the forward direction

Explanation:

The acid-catalysed hydration of alkenes proceeds via a carbocation mechanism.

Three transition states can be identified in this mechanism for the acid-catalyzed hydration of alkenes.

The three transition states are derived from the three steps in the reaction sequence:

1) Protonation of the alkene by hydronium ion

2) Addition of water to the carbocation

3) loss of a proton to yield the alcohol

The first step involves the breaking of a pi bond, hence it is a slow step hence it has the smallest rate constant. The other two steps are fast steps.

Answer:

0.13 M

Explanation:

The reaction equation is;

NaOH(aq) + KHC8H4O4(aq) ------> KNaC8H4O4(aq) + H2O(l)

Molar mass of KHP = 204.22 g/mol

Amount of KHP= mass/ molar mass = 0.3365 g/204.22 g/mol = 1.65 × 10^-3 moles

n= CV

Where;

C= concentration

V= volume in dm^3

n= number of moles

C= n/V = 1.65 × 10^-3 moles × 1000/250 = 6.6 × 10^-3 M

If 1 mole of KHP reacts with 1 mole of NaOH

1.65 × 10^-3 moles of KHP will react with 1.65 × 10^-3 moles of NaOH

From

n= CV

We have that only 12.44 ml of NaOH reacted

C= n/V = 1.65 × 10^-3 moles × 1000/12.44

C= 0.13 M

At the equivalence point, the KHP solution turned light pink.

Answer:

The molar mass of an element is the mass in grams of one mole (6.02 x 1023 particles) of the element.

Hope it help

Explanation:

good luck

Based on the reactants and products,

A precipitate is a solid product formed in when two solutions of salts react by double replacement.

The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3

The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+

The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

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pH ranges depending on the solution, for a solution with weak acid pH will be between 4.0-7.0.

pH is helps to determine if a solution is acidic or basic in nature.

A pH meter is the instrument that can be used for the measurements.

Methyl orange is used when titrating a strong acid against a weak base.

Therefore, the pH of the solution which is a weak acid will be between 4.0-7.0.

Learn more on pH level here,

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Answer:

2 protons per atom of Helium

Explanation:

The number of proton in a given element is given by its place on the periodic table which is for He 2 protons b/c the atomic number for He is 2.

Other Examples:

Hydrogen (H-1) or Protium has 1 proton b/c its atomic number is 1.

Magnesium (Mg-24) has 24 protons  b/c  its atomic number is 24.

Lead (Pb-207) has 82 protons b/c its atomic number is 82.

Uranium (U-238) has 92 protons b/c its atomic number is 92.

The periodic table order of arrangement of elements is based upon 'The Periodic Law'. => The chemical and physical properties of the elements is a periodic function of atomic numbers, or number of protons in the nucleus.

Answer:

22.8 L

Explanation:

Step 1: Given data

Step 2: Convert "T" to Kelvin

We will use the following expression.

K = °C + 273.15 = -6 + 273.15 = 267 K

Step 3: Calculate the volume of the gas

We will use the ideal gas equation.

P × V = n × R × T

V = n × R × T / P

V = 1.35 mol × (0.0821 atm.L/mol.K) × 267 K / 1.30 atm

V = 22.8 L

Answer: Decreases

Explanation: Electronegativity decreases because the valence electrons are farther from the nucleus.