A 39.2 g sample of copper took
up the 4.4 cm3 of space.
What is the density of the
copper piece in g/cm3?
[?] g/cm³
the tonths placo

The price of gas in Paris is 1.29 euro per liter . the price of gasoline in dollars per gallon is 6.1039 dollar per gallon.

The price of gas in Paris = 1.29 euro per liter.

we have to convert this in dollar per gallon,

it is given that ,

1 euro is equal to = 1.25 dollar

also, in one liter =0.264172 gallons

now, conversion to dollar per gallons are :

1.29 euro per liter =  (1.29 × 1.25 ) / 0.264172 dollars per gallon

                             =  1.6125 / 0.264172 dollars per gallon

                             =  6.1039 dollars per gallon

Thus,The price of gas in Paris is 1.29 euro per liter . the price of gasoline in dollars per gallon is 6.1039 dollar per gallon.

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The empirical formula of the oxide formed, given that 0.2 g of S reacts completely with 0.2 g of O is SO₂

The following data were obtained from the question:

The empirical formula of the oxide formed can be obtained as follow:

Divide by their molar mass

S = 0.2 / 32 = 0.00625

O = 0.2 / 16 = 0.0125

Divide by the smallest

S = 0.00625 / 0.00625 = 1

O = 0.0125 / 0.00625 = 2

From the calculations made above, we can conclude that the empirical formula of the oxide formed is SO₂

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Please find the equation to form copper (I) ion from neutral copper (Cu) below:

Hence, the correct equation is   mentioned above.

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Answer:

the answers b

Explanation:

Answer:

D)The liquid in test tube #2 was Catalase.

Explanation:

There are 0.697 moles in 4.2 × 10²³ molecules of a substance.

The number of moles in a substance can be calculated by dividing the number of molecules in that substance by Avogadro's number as follows:

no of moles = no of molecules ÷ 6.02 × 10²³

According to this question, 4.2 × 10²³ molecules of a substance is given. The number of moles in this substance can be calculated as follows:

no of moles = 4.2 × 10²³ ÷ 6.02 × 10²³

no of moles = 0.697moles

Therefore, there are 0.697 moles in 4.2 × 10²³ molecules of a substance.

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It’s ‘x’

’x’ only appears once

The volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

The volume of a substance can be calculated by dividing the mass of the substance by its density as follows:

Volume = mass ÷ density

According to this question, the density of ethanol is 0.789 g/cm³. A flask holds 165.0 g of ethanol and the volume can be calculated as follows:

Volume = 165.0g ÷ 0.789g/cm³

Volume = 209.13cm³

Therefore, the volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

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Answer:

11

Explanation:

Write an argumentative essay on "The Importance Of Homework.

According to the question, the declaration that best illustrates the cart is as follows:

Thus, the correct option for this question is C.

Velocity may be defined as a type of vector quantity that significantly determines the rate of alteration of the position of an object with respect to time.

According to the context of this question, the cart was migrating at a persistent velocity as a straight line which is significantly mentioned in the graph given above.

The rate through which the location and position enhance is directly proportional to the time. For example, when time increases, the distance or position also increases. So, it was migrating at a persistent velocity.

Therefore, the correct option for this question is C.

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Answer:

17.3178 g

Explanation:

n= m/Mr

m= n x Mr

n= 0.540

Mr of S =32.07

m = 0.540 x 32.07

m= 17.3178 g

The concentration of the new solution, given that 2/3 of it's initial volume was boiled away is 0.758 M

We'll begin by obtaining the new volume of the solution.This can be obtained as follow:

V₂ = 1 - 0.67

V₂ = 0.33 mL

The concentration of the new solution can be obtained as follow:

M₁V₁ = M₂V₂

0.250 × 1 = M₂ × 0.33

0.250 = M₂ × 0.33

Divide both side by 0.33

M₂ = 0.250 / 0.33

M₂ = 0.758 M

From the calculation made above, we can conclude that the concentration of the new solution is 0.758 M

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Answer:

It came from the soft drink being frozen.

Explanation:

When a drink gets frozen it expands and it causes the can to split open

The law of conservation of mass, also known as the principle of mass conservation, in physics and chemistry states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time because the mass of the system cannot change and therefore quantity cannot be added to or subtracted.

Conservation of Mass.

Antoine Lavoisier discovered in 1789 that mass is neither created nor destroyed in chemical reactions, which led to the formulation of the Law of Conservation of Mass. That is to say, the mass of any one element at the start of a reaction will be equal to that element's mass at the conclusion of the reaction. The overall mass will remain constant over time in any closed system if we take into account all reactants and products in a chemical reaction. Lavoisier's discovery transformed science and served as the cornerstone for contemporary chemistry.

Because naturally occurring elements are extremely stable under the circumstances present on the Earth's surface, the Law of Conservation of Mass is valid. The majority of elements are created in stars and supernovae through fusion processes. Therefore, atoms do not change into other elements during chemical reactions in the ordinary world of Earth, from the top of the tallest mountain to the bottom of the deepest ocean. As a result, each atom that makes up life and nonliving stuff is extremely old and has a past.

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The fact that both emphasize how crucial it is to plan ahead for lab experiments is one connection between the two sections.

How do you get ready for the lab?

We are aware that we conduct experiments in a laboratory. The majority of the experiments we conduct in the lab are either designed to support or refute a hypothesis. We conduct experiments from time to time to ascertain a scientific law.

We now need to think about the sections "Dressing for the Lab" and Making a Plan and Staying Focused." Dressing for lab prepares us for any accident or mishap that might take place while performing our experiment. Making a plan and staying focused emphasizes the fact that we must be prepared with what action plan or steps we have to follow and what equipment and material are required for the experiment.

Therefore, the fact that both emphasize how crucial it is to plan ahead for lab experiments is one connection between the two sections.

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There are five Family on the periodic table that are alkali metals , Alkaline earth metals , transition metals , Halogens family and noble gas family.

1) In alkali metals, there are six elements are present and among all the elements Sodium metal should be selected. Because sodium metal is most abundant metal in the world.

2) In alkaline earth metal family, The magnesium element should be selected.

3) In Halogens gas family , chlorine should be selected.

4) In transition metals , copper metal should be choose.

5) In noble gas elements, The helium gas should be selected

These are the daily life usage of all the elements of each family of the periodic table.

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The periodic table has the shape it has due to the arrangement of electrons in atoms.

This is referred to as the arrangement of the chemical elements in a tabular manner and it consists of 18 groups and 7 periods and are arranged in the order of increasing atomic number which have unique chemical properties.

The periodic table has that type of shape due to it having a resemblance of the pattern of how electrons fill the sub shells which is also the same as how they are arranged in atoms which is therefore the most appropriate choice.

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The equilibrium will change in a backward direction, favouring backward reaction. Equilibrium will shift in forward direction or more of SO 3 will be formed.

The concentration increases. The concentration decreases. There is no change. [O2]: The concentration increases. The concentration decreases. There is no change. [SO3]: The concentration increases. The concentration decreases. There is no change. Backward reaction will be favoured if pressure decreased.

[SO3]: The concentration increases. The concentration decreases. There is no change. [O2]: The concentration increases. The concentration decreases. There is no change.

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Question: Hello: ) ✨ what is the furthest planet from the sun and closest to the earth ?

Answer: Neptune is the furthest planet from the Sun in our Solar System but there are dwarf planets further out, notably Pluto. Pluto's orbit is a much more elongated ellipse than those of the other planets, so for 20 years out of its 249-year orbit, it is in fact closer to the Sun than Neptune.

Explanation:

In order of distance from the sun they are; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto, which until recently was considered to be the farthest planet, is now classified as a dwarf planeYou might think that the farthest planet from the Sun, or Earth, is Neptune since Neptune is 30 AU or 4.5 billion km / 2.8 billion mi away from us. However, it is actually Pluto who is the farthest planet from the Sun.

Have an awesome Day/Night<3

Answer:

Neptune is the farthest planet from Sun.

Explanation:

Pluto is a dwarf planet therefore it isn't Pluto.

931 g of nitric acid is required to react with 454 g of C₇H₈ in the reaction between them.

It refers to the relation between the amount of reactants and products. It is a quantitative study concerned with mainly numbers.It helps in utilizing the balanced chemical equations for calculating the quantity of reactants and products.

The reaction between nitric acid and C₇H₈ takes place as follows:

C₇H₈+3 HNO₃ [tex]\rightarrow[/tex]C₇H₅N₃O₆+ 3 H₂O

1 mole of C₇H₈ reacts with 3 moles of nitric acid .454 g of C₇H₈ are converted to moles using molar mass and then it's related with moles of C₇H₈ and moles of nitric acid .Then, the moles of nitric acid are converted to grams

454 g C₇H₈×1 mole C₇H₈/92.14 g ×3 moles nitric acid/1 mole C₇H₈×63.01 g nitric acid/ 1 mole nitric acid=931 g

Thus, 931 g of nitric acid is required to react with 454 g C₇H₈.

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Answer:Composition. Jupiter, Saturn, Uranus and Neptune collectively make up the group known as the jovian planets. The general structures of the jovian planets are opposite those of the terrestrial planets.

Explanation:

Hydrogen quickly can not pressurized steel cylinders because" The low volumetric energy density of hydrogen makes storage a challenge. Since it would be the lightest and most basic element, it is even lighter that helium it is quickly lost in the environment."

A very minor hydrogen leak could occur if hydrogen interacts with the metal or passes completely through to the outside surface. Metal's mechanical characteristics deteriorate when hydrogen is present in the metal's lattice (e.g., fatigue as well as fracture resistance). Hydrogen embrittlement would be a phenomenon (HE).

Intensifying the density and adding additional gas to the tank are two effects of cooling compressed hydrogen gas. Liquid nitrogen was frequently used to chill the system down to 77 K, which triples its volumetric capacity when compared to uncooled hydrogen.

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The volume of 3.153 M KOH required to make the given solution is 948.8 mL.

Molarity (M) is the amount of a substance in a certain volume of solution.

Total mass of the given solution is calculated as follows;

mass = mass conc. x volume

mass = 0.345 g/L x 9 L

mass = 3.105 g

The volume of 3.153 M KOH required to make the given solution is calculated as follows;

Molarity = mass/volume in liters

3.153 = 3.105/V

V = 3.105/3.153

V = 0.9848 L

V = 948.8 mL

Thus, the volume of 3.153 M KOH required to make the given solution is 948.8 mL.

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Answer:

yes it will because the air in the jar is co2 or o2 and these gases have the capacity to burn things out

From lack of Oxygen (a) less ATP is produce.

Aerobic means the process which require the oxygen. Anaerobic means process without oxygen. when cellular respiration takes place aerobically ( in the presence of oxygen ) , glucose react with oxygen form ATP this can be used by cell, and by product is water and carbon dioxide.

C₆H₁₂O₆   +   6O₂    ---------->    6CO₂   +   6H₂O   +  ATP

To learn Without the presence of oxygen very less ATP is produced. In the absence pf oxygen ,glucose is breaks down into the alcohol and carbon dioxide with release of energy.

Thus, From lack of Oxygen (a) less ATP is produce.

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The specific requirements in Science to work in the universe include several features, i.e., consistency, observation, predictability and testability.

The expression 'requirements in Science' makes reference to all issues that must be fulfilled to work in a given scientific field in particular as the case of physics in the Universe, which depends on several characteristics, especially predictability and testability.

In conclusion, the specific requirements in Science to work in the universe include several features, i.e., consistency, observation, predictability and testability.

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Answer:

salt and sugar can mix the best with water bcoz its an homogeneous mixture

thank uh

Answer:

Many of the atomic masses listed on the periodic table are decimal values because it's the weighted average mass of all of the isotopes of that element. The mass of each isotope of an element is multiplied by its percent abundance in nature

When studying quantum mechanics, the de Broglie wavelength is a key idea. De Broglie wavelength is the wavelength () that is connected to an item in relation to its momentum and mass.

Typically, a particle's force is inversely proportional to its de Broglie wavelength.

Assuming that the smallest measurable wavelength in an experiment is 0.830 fm , what is the maximum mass of an object traveling at 171 m⋅s−1 for which the de Broglie wavelength is observable?

We know:

According to the following equation, an object's de-Broglie wavelength solely depends on its momentum:

λ = h/p = h/m*v, where,

By rearranging the above equation, the object's mass can be written as:

        m = h/λv

The maximum mass and the minimum de Broglie wavelength of the item are inversely correlated because the two quantities are inversely proportional to one another. When we enter the values provided, we get:

        m = {6.626×10^(−34) J⋅s} / {0.330 fm × 157 m/s}

            ≈ 1.28×10^(−20) kg

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The amount of Amoxicillin dose given to the 85.4 lb child daily is determined as 1,743.3 mg.

The amount of  Amoxicillin  dose given to the child is calculated as follows;

amount of Amoxicillin dose = weight of the child x dosage prescribed

The weight of the child in pounds (lb) is calculated as follows;

1 lb = 0.453592 kg

85.4 lb = ?

= 85.4 x 0.453592 kg

= 38.74 kg

amount of Amoxicillin dose = 38.74 kg x 45 mg/kg

amount of Amoxicillin dose = 1,743.3 mg

Thus, the amount of Amoxicillin dose given to the 85.4 lb child daily is determined as 1,743.3 mg.

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The complete question is below:

A 85.4 lb child has a Streptococcus infection. Amoxicillin is prescribed at a dosage of 45 mg per kg of body weight per day given b.i.d. Calculate the daily dose of the child.