A 0.10 L solution with 1.85 g of Ca(OH)2 is of what concentration, in molarity?

Answer:  0.885 M

Explanation:  19.4 grams of NaCl is (19.4g/58.55 g/mole) = 0.332 moles of NaCl.  375ml is 0.375 liters.  Molar is moles per liter:  (0.332 moles NaCl/0.375 liters) = 0.885 M

Answer:

the answer is b im pretty sure

Explanation:

sorry if im wrong

The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex]. The empirical formula is also known as the simplest basic formula.

A molecular formula is indeed a formula derived with molecules that corresponds to the total number of distinct atoms in the molecule of a chemical. A subscript inside a molecular formula denotes the number for each type of atoms in the substance's molecule.

The empirical formula provides the most basic formula for something like a compound, defined by the ratio between subscripts of the formula's smallest entire number of constituents. It is also known as the simplest basic formula. An empirical formula is the formula of a material given with the least integer subscript. The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].

Therefore, the molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].

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Answer:

The most important elements that we use in everyday life include carbon, hydrogen, oxygen, with smaller amounts of things like chlorine, sulfur, calcium, iron, phosphorus,nitrogen, sodium, and potassium. Apart from these, other elements include magnesium, zinc, neon, and helium are also in our daily existence.

all these element are my favourite element .......

Answer:

8.3g

Explanation:

d=m/v

m=d*v

m=0.893*9.29

m=8.3g

If the density of carbon tetrachloride is 0.893 g/mL. The mass of the compound will be 8.3 g.

Mass is the quantity of matter. The mass can be calculated by multiplying density with the volume. The evaluation of how close something is packed. As the mass per unit volume, it has that definition.

Volume is the space occupied by the object. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance that is less dense than water will float if it is gently introduced to the water's surface.

So the formula will be d = m / v

m = d x v

The density of carbon tetrachloride is 0.893 g/m

The volume of carbon tetrachloride is 9.29 mL

What the mass is?

Putting the value in the formula

m = 0.893  x 9.29 = 8.3g

Thus, the mass of the compound will be 8.3 g.

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Answer:

H = 6

O = 6

Fe = 3

Total atoms = 15

Explanation:

3Fe (OH)2

Fe = 1×3

O= 2× 3 = 6

H= 2× 3 = 6

Total atoms = 6+6+3=15

I hope I helped you^_^

Answer:  588.9 lbs

Explanation:  1 lb = 0.454 kg

(267.1kg)*(1 lb/0.454 kg) = 588.9 lbs

Answer:

2477.6 cm³

Explanation:

Volume = length x width x height

Label in cm³

Answer:

10 ml

Explanation:

The graduated cylinder contains 19 ml of water before the silver pellet is placed inside. Afterwards, the graduated cylinder measures 29 ml of water. Therefore the pellet displaced 10 ml of water. ( 29ml - 19ml = 10ml )

Answer:

A. Chemistry.

Explanation:

Answer: B

Explanation:

The rate law is the mathematical equation that describes how reactant concentration changes as a function of time. A law such as "Rate = k*[A]*[B]" means that, for each liter-equivalent of the reactant(s) A, there are k liters of reactant B. The law also dictates the molarity (and thus partial pressure) for each component in solution.

Answer:

it would take 2 years

Explanation:

93/55=1.69--->1.70------>2

Molecular Mass of water:-

[tex]\\ \sf\longmapsto H_2O[/tex]

[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]

[tex]\\ \sf\longmapsto 2u+16u[/tex]

[tex]\\ \sf\longmapsto 18u[/tex]

[tex]\\ \sf\longmapsto 18g[/tex]

1mole of water weighs 18g

We know

[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]

Mass of one molecule:-

[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]

[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]

The statement that correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant is "he relationship is directly proportional; as temperature increases, volume increases in the same way."

In mathematics, a direct proportion means that the two variables increase or decrease simultaneously. As one increases the other increases and vice versa.

According to Charles law; the volume of a given mass of gas is directly proportional to its volume at constant pressure.

As a result of this law, the correct statement is option D; The relationship is directly proportional; as temperature increases, volume increases in the same way.

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Answer: A lot of the steps are the same.

Explanation:

Scientific Method

State your question

Do background research

Formulate your hypothesis, identify variables

Design experiment, establish procedure

Test your hypothesis by doing an experiment

Analyze your results and draw conclusions

Communicate results

Steps of The Scientific Method

Engineering Design Process

Define the problem

Do background research

Specify requirements

Create alternative solutions, choose the best one and develop it

Build a prototype

Test and redesign as necessary

Communicate results

Steps of The Engineering Design Process

Answer:

0

Explanation:

It has no charge.

Salicylic acid is insoluble in water because it is a non-polar covalent compound.

For this reason it is a poor conductor of electricity as it has no free moving ions that would act as charge carriers.

But on the other hand salicylate which is a conjugate base of salicylic acid has a charge of -1 and can be written as C7H5O3-.

hopefully this makes sense

:)

The volume in liters of 3245 aluminum cans is 24.8 L.

A recycling center collects 3245 aluminum cans and there are 22 aluminum cans in 1 lb. The mass of 3245 aluminum cans is:

[tex]3245 cans \times \frac{1lb}{22cans} = 147.5 lb[/tex]

To convert mass to volume, we need the density of aluminum (5.95 lb/L). The volume corresponding to 147.5 lb of aluminum is:

[tex]147.5 lb \times \frac{1L}{5.95 lb} = 24.8 L[/tex]

The volume in liters of 3245 aluminum cans is 24.8 L.

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Explanation:

The chemical reaction that describes the combustion of methane is

[tex]\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}[/tex]

We need to convert the mass of methane to moles:

[tex]0.00880\:\text{g} × \dfrac{1\:\text{mol CH}_4}{16.04\:\text{g}}[/tex]

[tex]= 5.49×10^{-4}\:\text{mol CH}_4[/tex]

Now use the molar ratios to determine the amount of oxygen used during the combustion:

[tex]5.49×10^{-4}\:\text{mol CH}_4×\left(\dfrac{2\:\text{mol O}_2}{1\:\text{mol CH}_4}\right)[/tex]

[tex] = 0.00110\:\text{mol O}_2[/tex]

Converting this to grams, we find that the mass of oxygen is

[tex]0.00110\:\text{mol O}_2×\left(\dfrac{15.999\:\text{g O}_2}{1\:\text{mol O}_2}\right)[/tex]

[tex] = 0.0176\:\text{g O}_2[/tex]

The unit that is equivalent to 75g is 0.075 kg, 750 dg, and 7.5 dag. The correct options are b, c, and d.

Measuring units are the units used to denote the measurement quantities. There are seven basic measuring units. They are length, Time, Amount of substance, Electric current, Temperature, Luminous intensity, and Mass.

The current unit is given grams, which are used to measure the mass of any object.

1000 grams is equal to 1 kilogram and 1 dg = 0.1 g, and 1 dag = 10 g. So by this formula, each of the quantities can be calculated.  

1 kg = 1000 g

So, 0.075 kg = (0.075 × 1000)g = 75 g

1 dg = 0.1 g

So, 750 dg = (750 × 0.1) g = 75 g

1 dag = 10 g

So, 7.5 dag = (7.5 × 10) g = 75 g

Thus, the correct options are b. 750 dg, c. 7.5 dag, and d. .075 Kg.

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A wooden baseball bat is an example of a heterogeneous substance.

A heterogeneous substance is consists of compounds that are not thoroughly mixed together.

Woods are fibrous structural substances with spaces present in trees and other woody plants' stems as well as roots. They are composed of a natural composite of cellulose fibers and are contained with a lignin matrix that is capable of resisting compression.

They can use for fire, building, the manufacture of weapons and tools, furniture, as well as paperwork.

Wood is a heterogeneous, highly porous cellular material. It is made up of cells and the cell walls are made up of roughly 40% cellulose, 15% hemicellulose, and lignin of about (15–30%).

Therefore, we can conclude that a wooden baseball bat is an example of a heterogeneous substance.

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Answer:B

Explanation: i got it right

The scientists use weather balloons to measure up to about 100,000 feet of elevation. The correct option is D.

A weather balloon, also known as a sounding balloon, is a balloon that carries instruments aloft to transmit data on atmospheric pressure, temperature, humidity, and wind speed using a small, disposable measuring device known as a radiosonde.

Weather balloons can travel up to 24 miles (39 kilometres) before bursting, and a payload can land (via parachute) up to 75 miles (120 kilometres) away, depending on wind conditions at the launch site.

If the balloon is flexible, it will expand as it rises to lower air pressure altitudes.

To prevent them from popping, weather balloons are only partially filled when released.

Thus, the correct option is D.

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Answer:3.935g/cm3

Explanation:39.35 g. /10cm3 = 3.935g/cm3

10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.

Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.

Density is calculated by dividing an object’s mass by its volume.

The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³

Density = mass/volume

            = 39.35 g/10 cm³

            =3.935 g/cm³.

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coal

Which of these can be mined from earth and used as an energy source?

A.Get rid of the waste and extra fluid

B.Ureters

C.Coal

D.Bladder

ans is coal

Answer:

1 mol of H2SO4 contains 6.022 x 10^23 molecules. : 0.5 mol of H2SO4 contains 0.5 x 6.022 x 10^23 molecules. = 3.011 x 10^23 molecules . that is 49 g of H2SO4 contains 3.011 x 10^23 molecules of H2SO

Explanation:

Answer:

222.1

Explanation:

(14+4*1)*2+32.1+16*4+(2*1+16)*5=222.1

Answer:

Electron configuration is the structural arrangement notation of electrons in the shells or energy levels of an atom.

Explanation:

[tex]{ \sf{}}[/tex]

Answer:

it indicates how long it takes for the material to decay

Explanation:

hope this helps!

The half-life of a radioactive substance indicates how long it takes for the material to decay.

A half life is the amount of time it takes for half of a radioactive substance to decay.

Radioactive isotopes are defined as the isotopes which undergo decay processes very easily. They have very short half life. They are usually the isotopes of heavier elements.

Half life is defined as the time taken for the unstable isotope to fall to half its original value.

Hence, option C is correct.

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Answer:   In table below.

Explanation:

A.N. (atomic number) = protons

Mass (Total AMU)

Charge

P= Protons, same as atomic number

N = Neutrons, Atomic Mass Number - Protons

E = Electrons.  (Atomic Number - Charge)

Element = Defined by atomic number

a) Atomic number=9   Protons = 9, neutrons = 9, electrons = 10

b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36

c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52

d) Atomic number=81,  Protons = 81, neutrons = 120, electrons = 80

e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.

Atomic Number (Z)= number of protons = number of electrons

Mass number (A) = number of protons + number of neutrons.

For ions with a positive net charge:

Number of electrons = Z - net charge

For ions with negative net charge:

Number of electrons = Z + net charge

a) Atomic number=9   Protons = 9, neutrons = 9, electrons = 10

b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36

c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52

d) Atomic number=81,  Protons = 81, neutrons = 120, electrons = 80

e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.

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