If the density of a substance is 15g/ml what would the volume be if it has
a mass of 10g?

Answer:

step1

NH4NO3(s)+H2O(I)--------->NH⁴OH(aq)+HNO³(aq)

step²

NH⁴OH(aq)+HNO³(aq)-------->NH⁴+(aq)+NO³-(aq)+H²O(I)

If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.

The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:

2PbS + 3O2 -> 2Pb + 2SO2

From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.

To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:

Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol

Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol

Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.

To calculate the mass of Pb, we multiply the number of moles by its molar mass:

Molar mass of Pb = 207.2 g/mol

Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g

This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.

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Answer:

The three types of organisms in an ecosystem are producers, consumers, and decomposers.

Producers get their energy by using sunlight to make their own food from water and carbon dioxide through photosynthesis.

Consumers get their energy by eating plants and animals for food as they cannot make their own food.

Decomposers get their energy by eating/scavenging and breaking down dead and decaying plant and animal bodies.

Hope that helps.

Answer:

C. An organized way to test scientific ideas.

Explanation:

The Scientific Method is a series of steps to test ideas and hypothesizes. We use the Scientific Method to make it easier to organize and label things step by step.

Answer:

the one that uses radio communication is FM Radio

Answer:

56,9

Explanation:

According to molar concentration, 6.113 grams of  sodium chloride are there in 55.0 ml of a 1.90 M aqueous solution of sodium chloride.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in first formula mentioned gives, mass= 1.90×58.5×0.055=6.113 g.

Thus,6.113 grams of  sodium chloride are there in 55.0 ml of a 1.90 M aqueous solution of sodium chloride.

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Answer:

51.14%

Explanation:

The following data were obtained from the question:

Mass of hydrated salt = 7.212 g

Mass of anhydrous salt = 3.524 g

Percentage mass of water =..?

Next, we shall determine the mass of the water in the hydrated salt. This can be obtained as follow:

Mass of hydrated salt = 7.212 g

Mass of anhydrous salt = 3.524 g

Mass of water =.?

Mass of water = (Mass of hydrated salt) – (Mass of anhydrous salt)

Mass of water = 7.212 – 3.524

Mass of water = 3.688 g

Finally, we shall determine the percentage mass of water in the hydrated salt as follow:

Percentage of water

= mass of water /mass of hydrated salt × 100

Percentage of water = 3.688/7.212 × 100

Percentage of water = 368.8/7.212

Percentage of water = 51.14%

Therefore, the percentage of water in the hydrated salt is 51.14%

Answer:

Nickle

Explanation:

Symbol: Ni

Atomic number: 28

Electron configuration: [Ar] 3d⁸4s²

Atomic mass: 58.6934 u

Melting point: 2,651°F (1,455°C)

Discovered: 1751

The element is Ni(Nickel) with 28 electrons and a charge of 2+.

The atomic number is represented as Z. Atomic number is equal to the number of protons which is equal to the number of electrons.

So, in the case given in the question, the atomic number is 28 because it has 28 electrons.

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Answer:

6.32 × 10⁻³

3.2560008× 10⁷

5.630× 10⁰

9.5002× 10¹

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

For example:

0.00632

In scientific notation =  6.32 × 10⁻³

32,560,008

In scientific notation  = 3.2560008× 10⁷

5.630

In scientific notation  = 5.630× 10⁰

95.002

In scientific notation  = 9.5002× 10¹

Answer:

1. 10⁻³

2. 10⁷

3. 10⁰

4. 10¹

Scientific notation is where you make a large number into a smaller form.

The numbers and exponents are the answers. Here are the parts:

10 = the base

⁻³ = the exponent/power

Hope this helps!

Answer:

true

Explanation:

Answer:

i think thats right

Explanation:

go with ur gut

Answer:the first and the second one

Explanation:

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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Explanation:

Which of the following is not a postulate of the kinetic molecular theory?

Answer is

option D. the collisions between gas molecules are elastic

Hope it will help you

Answer:

This is required answer.

Explanation:

Given that:

1. by addition the ammonia to acetic acid

using balanced chemical equation:

ammonium acetate:

The balanced equation is:

NH₃ + H₂O ===> NH₄OH

when ammonia gas dissolves in water then we get the base in form of ammonium hydroxide.

When  NH₄OH reacts with CH₃COOH then we get ammonium acetate and water

NH₄OH + CH₃COOH ===> [CH₃COO]- & NH₄+ & H₂O

So, we can say that,

when we are adding an acid and a base together then we get the product of H₂O and given elements.

2. addition of barium hydroxide to sulfuric acid:

The balanced equation is :

H₂SO4+ Ba(OH)₂--> BaSO₄+ 2H₂O

when acid and base reacts together than we get barium sulphate and water

when sulfuric acid and barium hydroxide.

Hence, this is required answer.

Answer:

Option d is correct option = Frequency of light is 6.56×10⁻² Hz

Explanation:

Given data:

Frequency of light = ?

wavelength of light = 4.57×10⁹m

Solution:

Formula:

Speed of light = wavelength × frequency

c = λ × f

f = c/λ

This formula shows that both are inversely related to each other.

The speed of light is 3×10⁸ m/s

Frequency is taken in Hz.

It is the number of oscillations, wave of light make in one second.

Wavelength is designated as "λ" and it is the measured in meter. It is the distance between the two crust of two trough.

Now we will put the values in formula.

f = 3×10⁸ m/s / 4.57×10⁹m

f = 0.656×10⁻¹s⁻¹

s⁻¹  = Hz

f = 0.656×10⁻¹  Hz or 6.56×10⁻² Hz

Answer:

T-R-U-E... true?

Answer:

True

Explanation:

Hope this helps

Explanation:

be2+ stable

Ne stable

Br- stable

h+ notstable

Answer:

Explanation:

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

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass of object = 8.3 g

volume = final volume of water - initial volume of water

volume = 8 - 6 = 2 mL

So we have

[tex]density = \frac{8.3}{2} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Approximately [tex]0.43\; \rm kPa[/tex] (rounded to two significant figures.)

Explanation:

Let [tex]P_0[/tex]. [tex]V_0[/tex], and [tex]T_0[/tex] denote the initial pressure, volume, and temperature of this sample. Let [tex]P_1[/tex]. [tex]V_1[/tex], and [tex]T_1[/tex] denote the final pressure, volume, and temperature of this sample.

Convert the two temperatures to degrees Kelvins:

[tex]T_0 = 15.0 + 273.15 = 288.15\; \rm K[/tex].

[tex]T_1 = (-25.0) + 273.15 = 248.15\; \rm K[/tex].

Based on the assumption that the ammonia sample here is an ideal gas, it should satisfy the ideal gas equation:

[tex]P\, V = n\, R \, T[/tex], where:

The value of the ideal gas constant, [tex]R[/tex], should stay the same during this change.

On the other hand, assume that this sample did not leak during this change. Hence, the number of moles of gas particles in the sample, [tex]n[/tex], should also stay the same during this change.

Therefore:

[tex]\displaystyle \frac{P_0\, V_0}{T_0} = n\, R[/tex].

[tex]\displaystyle \frac{P_1\, V_1}{T_1} = n\, R[/tex].

Combine these two equations to obtain:

[tex]\displaystyle \frac{P_0\, V_0}{T_0} = \frac{P_1\, V_1}{T_1}[/tex].

Rearrange this equation and solve for [tex]P_1[/tex], the final pressure of this sample:

[tex]P_1 = \displaystyle \frac{P_0\, V_0\, T_1}{T_0\, V_1} = \frac{P_0\, T_1}{T_0} \cdot \left(\frac{V_0}{V_1}\right)[/tex].

The question stats that the Initial pressure of this sample is [tex]P_0 = 0.79\; \rm kPa[/tex].

On the other hand, volume "increased by [tex]60.0\%[/tex]" means that the final volume would be [tex](1 + \underbrace{0.600}_{60\%}) = 1.600[/tex] times the initial volume. Therefore:

[tex]\displaystyle \frac{V_0}{V_1} = \frac{V_0}{(1 + 0.600)\, V_0} = \frac{1}{1.600}[/tex].

Solve for the final pressure of this sample, [tex]P_1[/tex]:

[tex]\begin{aligned}P_1 &= \frac{P_0\, T_1}{T_0} \cdot \left(\frac{V_0}{V_1}\right) \\ &= \frac{0.79\; \rm kPa \times 248.15\; \rm K}{288.15\; \rm K} \times \frac{1}{1.600} \approx 0.43\;\rm kPa\end{aligned}[/tex].

(Rounded to two significant digits.)

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of object = 64 mL

density = 8 g/mL

The mass is

mass = 8 × 64

We have the final answer as

Hope this helps you

Answer:

the amount of time he takes to react is the dependent variable

Explanation:

the independent variable is what you intentionally change in an experiment, and the dependent variable is what is changing based off of your independent variable. In this case, the IV is the sounds being played, and the DV is the amount of time it took Robert to react

Answer:

This does not make any sense. You need to give the options.

But I think what you mean is

Which of the following represents a chemical change?

A Mowing of grass

B Sublimation of ice

C Dissolving sugar in water

D Charring of a marshmallow

The answer would be D

Explanation:

A color change is a chemical change and charring a marshmallow means burning it and that will change the color.

HOPE THIS HELPS ;D

Answer:

…mixture of two stable isotopes—boron-10 (19.9 percent) and boron-11 (80.1 percent); slight variations in this proportion produce a range of ±0.003 in the atomic weight.

Explanation:

Answer:

no

Explanation:

if you are referring to the first question, the answer is no. the equation is unbalanced because the left side has 4 hydrogens and the right has only 2, and the left has 2 oxygens while the right has 3. this means it does not follow the law of conservation of mass because each side has a different mass.

A pH of 4 is ten times more acidic than a pH of 5.

Yes, pH can have decimal values. In fact, pH values can range from 0 to 14 and can have any value between them including decimals. pH is a measure of the acidity or alkalinity of a solution, and it is determined by the concentration of hydrogen ions (H+) in the solution.A solution with a pH of 7 is neutral, which means that it has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-). An acidic solution has a pH below 7 and a high concentration of H+ ions. On the other hand, an alkaline solution has a pH above 7 and a low concentration of H+ ions.A pH that is less than 7.0 indicates acidity. pH less than 7.0 is acidic while pH greater than 7.0 is alkaline. Each number on the pH scale represents a ten-fold change in the acidity/alkalinity of the solution. For example, a pH of 5 is 10 times more acidic than a pH of 6, and 100 times more acidic than a pH of 7.A pH of 0 indicates a very strong acidic solution while a pH of 14 indicates a very strong alkaline solution. It's worth noting that pH is a logarithmic scale, meaning that a change of one pH unit corresponds to a ten-fold change in hydrogen ion concentration.

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When 325 g of CHCl3 is produced, approximately 99.29 grams of HCl are produced.

To determine the amount of HCl produced when 325 g of CHCl3 (chloroform) is produced, we need to use the balanced chemical equation for the reaction:

CHCl3 + 2NaOH -> NaCl + H2O + CCl4

From the balanced equation, we can see that the stoichiometric ratio between CHCl3 and HCl is 1:1. This means that for every 1 mole of CHCl3, 1 mole of HCl is produced.

To calculate the number of moles of CHCl3, we need to divide the given mass (325 g) by its molar mass:

Molar mass of CHCl3 = 12.01 g/mol (C) + 1.01 g/mol (H) + 3 x 35.45 g/mol (Cl) = 119.38 g/mol

Moles of CHCl3 = 325 g / 119.38 g/mol = 2.72 mol

Since the stoichiometric ratio between CHCl3 and HCl is 1:1, the number of moles of HCl produced is also 2.72 mol.

To calculate the mass of HCl, we multiply the number of moles by its molar mass:

Molar mass of HCl = 1.01 g/mol (H) + 35.45 g/mol (Cl) = 36.46 g/mol

Mass of HCl = 2.72 mol x 36.46 g/mol = 99.29 g

This calculation is based on the stoichiometric ratio between CHCl3 and HCl, where 1 mole of CHCl3 produces 1 mole of HCl. By converting the given mass of CHCl3 to moles and then multiplying by the molar mass of HCl, we can determine the mass of HCl produced.

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Answer:

A homogeneous mixture is a solid, liquid or gaseous mixture that has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components in which proportions vary throughout the sample.

Explanation:

Sugar dissolves and is spread throughout the glass of water. ... The sugar-water is a homogenous mixture while the sand-water is a heterogeneous mixture. Both are mixtures, but only the sugar-water can also be called a solution.

Answer:

if you are talking about miles the answer would be is 0.0001509932(divided by 160934)

if you are talking about mililiters it would be 24.3(multiply times one)

hope this helps

Answer:

Volume of benzene is 73.23 mL.

Explanation:

Given data:

Volume of benzene = ?

Mass of benzene = 64.0 g

Solution:

The given problem will be solved through density formula.

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

The value of density of benzene in literature is 0.874 g/mL.

0.874 g/mL = 64.0 g/ v

v = 64.0 g/0.874 g/mL

v = 73.23 mL