A gas has a volume of 50mL at a pressure of 2 atm. Increase the volume to 200mL, and the temperature remains constant. What is the new pressure?

To identify minerals

Each material chemical makeup are a variety of chemical compounds which has each own category. They have different functional groups which helps people identify which material they look for. For instance, hydroxyl group has chemical makeup of alcohol

To identify minerals

Explanation:

Each material chemical makeup are a variety of chemical compounds which has each own category. They have different functional groups which helps people identify which material they look for. For instance, hydroxyl group has chemical makeup of alcohol

Answer:

A

Explanation:

Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

Answer:

The seven SI base units, which are comprised of:

Length - meter (m)

Time - second (s)

Amount of substance - mole (mole)

Electric current - ampere (A)

Temperature - kelvin (K)

Luminous intensity - candela (cd)

Mass - kilogram (kg)

Explanation:

Answer:

The seven SI base units, which are comprised of:

* Length - meter (m)

* Time - second (s)

* Amount of substance - mole (mole)

* Electric current - ampere (A)

* Temperature - kelvin (K)

* Luminous intensity - candela (cd)

* Mass - kilogram (kg)

Explanation:

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Answer:

13.39

Explanation:

Density is g/mL divide the grams by the mL

Answer:

A) oxygen moles/sec = 48 * 10 ^-14  mol/sec

B) mass of oxygen = 1536*10^-14 grams

Explanation:

cross sectional area of cylinder = 2cm^2 = 2 * 10^-4 m^2

length of cylinder = 5 cm = 0.05 m

concentration at one end = 0.2 mol m^-3

concentration falls linearly at other end = 0.05 mol m^-3

Diffusion constant of oxygen = 8 * 10^-10  m^2 s^-1

A ) Number of moles of oxygen passing every second

 N = A * D * [tex]\frac{dc}{dt}[/tex]   ------- ( 1 )

A = area , D = diffusion constant,  [tex]\frac{dc}{dt}[/tex] = rate of change of diffusion

dc /dt = ( 0.2 - 0.05 ) / 0.05  = 3 mol m^-4

back to the equation

N = ( 2 * 10^-4 ) * ( 8 * 10^-10 ) * ( 3 ) = 48 * 10 ^-14  mol/sec

B) Mass of oxygen passing down the cylinder each second

This can be obtained by converting : 48 * 10^-14 moles to grams

1 mole of oxygen  =  32 grams of oxygen

therefore : 48 * 10^-14 moles of oxygen = ( 32 * (48*10^-14) = 1536*10^-14 grams

in endothermic reaction heat is added

Answer:

Electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions

Explanation:

In accordance with VSEPR theory, the electron domains or electron pairs on the valence shell of the central atom in a molecule always position themselves as far apart in space as possible in order to minimize repulsions.

Recall that according to VSEPR theory, the shape of a molecule depends on the number of electron pairs or electron domains on the valence shell of the central atom of the molecule, both lone pairs and bond pairs. Lone pairs are known to cause more repulsions than bond pairs.

Awnser: The awnser would be (D) Thomas

Explanation:

Use Quizlet

Answer:

5 electron

It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electron in 4p orbital.

Answer:

Explanation:

To find the original pressure we use the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the original pressure

[tex]P_1 = \frac{P_2V_2}{V_1} \\[/tex]

From the question

V1 = 20 L = 20,000 mL

P2 = 560.0mmHg

V2 = 15700mL

We have

[tex]P_1 = \frac{560 \times 15700}{20000} = \frac{8792000}{20000} = \frac{2198}{5 } \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

To find the concentration of new solution we use the formula

[tex]C_1V_1 = C_2V_2[/tex]

where

C1 is the concentration of the stock solution

V1 is the volume is the volume of the stock solution

C_2 is the concentration of the diluted solution

V2 is the volume of the diluted solution

Since we are finding the the concentration of new solution

[tex]C_2 = \frac{C_1V_1}{V_2} \\[/tex]

From the question

C1 = 0.575 M

V1 = 298 mL

V2 = 750 mL

We have

[tex]C_2 = \frac{0.575 \times 298}{750} \\ = 0.228466666...[/tex]

We have the final answer as

Hope this helps you

Answer:

1.325×10²⁵

Explanation:

1 mole of H2O has 2 mole of H atom

11 mole of H20 has 22 mole of H atom

we know

1 mole=6.023×10²³ atom

hence 22mole H =22×6.023×10²³

=1.325×10²⁵

Answer:

C

Explanation:

[Ne]3s23p1

Answer:

C

Explanation:

Answer:

The specific heat of substance is 0.90 j/g.°C.

Explanation:

Given data:

Mass of sample = 341.0 mg (341.0/1000 = 0.341 g)

Initial temperature = 8.4 °C

Final temperature = 21.5 °C

Heat needed = 4.03 J

Specific heat capacity of substance = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT = 21.5 °C - 8.4 °C

ΔT = 13.1 °C

4.03 J = 0.341 g × c ×13.1 °C

4.03 J = 4.4671 g.°C  × c

c = 4.03 J  /4.4671 g.°C

c= 0.90 j/g.°C

The specific heat of substance is 0.90 j/g.°C.

Answer:

Explanation:

Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.

Explanation:

CuSO4.5H2O and CaSO4.2H2O

Answer:

CaSO4 is an example of anhydrous compound

Reason:

Calcium Sulphate (CaSO4) does not contain water in its crystal structure, unlike other minerals.

Answer:

D. potential energy

Explanation:

Answer:

whether the molecule is formed from at least two atoms

Explanation:

A feature that distinguishes an elemental molecule and a compound molecule is whether the molecules are formed from at least two atoms.

An elemental molecule is a molecule that contains two or more of the same kind of elements.

A compound molecule contains two or more different kinds of molecules.

A molecule is a unit of a compound that can represent such a compound.

Therefore, what distinguishes an elemental molecule from a compound molecule is whether a molecule forms from at least two atoms.

An example of the buoyant force on a piece of bread is the piece of bread floats on the surface of body water such as a lake.

This is a force experienced by objects when they are in a body of water. This force implies objects have an upward force, which in many cases causes them to float.

Any object that is submerged in water but floats or shows to have an upward force is an example of this force. Based on this, the option that clearly shows the buoyant force is a bread floating on a lake.

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Answer:

A

Explanation:

Answer:

the last one i think

Explanation:

Answer:

4.5 × 10²³ number of atoms Al

Explanation:

Given data:

Mass of Al = 20 g

Number of atoms of Al = ?

Solution:

The given problem will solve by using Avogadro number.

'It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance" .The number 6.022 × 10²³ is called Avogadro number.

We will calculate  the number of moles of Al first:

Number of moles = mass/molar mass

Number of moles = 20 g/ 27 g/mol

Number of moles = 0.74 mol

1 mole = 6.022 × 10²³ number of atoms

0.74 mol ×  6.022 × 10²³ number of atoms / 1 mol

4.5 × 10²³ number of atoms Al

The required number of atoms is [tex]4.46\times 10^{23}[/tex]

Atomic weight, also called relative atomic mass, ratio of the average mass of a chemical element’s atoms to some standard.

Given that,

Mass=[tex]20[/tex] grams

1 mole of aluminum [tex]= 27g = 6.023\times10^{23}[/tex] number of atoms 27g of aluminum contains [tex]6.023\times10^{23}[/tex] a number of atoms.

Therefore,20 grams the number of atoms is,

[tex]6.023\times10^{23}\times\frac{20}{27} =4.46\times10^{23}[/tex]

Learn more about the topic of atomic weight:

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Answer:

nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle).

Answer:Physical changes involve states of matter and energy. No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.

Explanation:

Answer:

C. a nail made from the metal iron

Explanation:

I did the test.

The product made from non-renewable resources is nail made from the metal iron.

Non renewable resources are materials that do not replenish themselves but they are easily exhausted or diminished after a period of time.

Therefore, The product made from non-renewanleable resources is nail made from the metal iron.

Learn more about nonrenewable resources below.

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#SPJ2

Answer:

The identity of unknown substance is Barium.

Explanation:

The given compound has a formula of MCl2. And the percentage of chlorine in this compound is said to be 34.1 %. But, we know that the mass of chlorine in this compound is, 35.5*2 = 71 g

Therefore, if we let x be the total mass of the compound, then:

34.1% of x = 71 g

(0.341)x = 71 g

x = 71 g/0.341

x = 208.2 g

Hence, the mass of other atom M, must be:

M = x - 71 g

M = 208.2 g - 71 g

M = 137.2 g

Now, we look into periodic table in group II. We find that the element is Barium with atomic mass of 137 g.

The identity of unknown substance is Barium.

Barium forms a metal chloride whose percentage of chlorine is 34.1 %. The unknown substance is barium chloride.

We have a Group II metal chloride with a general formula MCl₂. The molar mass of Cl⁻ is 35.45 g/mol. The mass of 2 moles of Cl⁻ is:

[tex]2 mol Cl^{-} \times \frac{35.45g Cl^{-} }{1mol Cl^{-} } = 70.90g Cl^{-}[/tex]

70.90 g represents 34.1% of 1 mole of MCl₂. The molar mass of MCl₂ is:

[tex]70.90gCl^{-} \times \frac{100gMgCl_2}{34.1gCl^{-} } = 208gMgCl_2[/tex]

208 g of MCl₂ contains 70.90 g of Cl⁻. The mass of M²⁺ in 1 mole of MCl₂ is:

[tex]mMCl_2 = mCl^{-} + mM^{2+} \\\\mM^{2+} = mMCl_2 - mCl^{-} = 208g-70.9 g = 137.1 g[/tex]

Barium has a molar mass of 137.3 g/mol, so M must be barium. The unknown substance is barium chloride.

Barium forms a metal chloride whose percentage of chlorine is 34.1 %. The unknown substance is barium chloride.

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Answer:

it is second one

Explanation:

thanks

Answer:

Argon-40

the reason this is abundent is because this is a more common isotope

Explanation:

Answer:

0.70 J/g.°C

Explanation:

Step 1: Given data

Step 2: Calculate the specific heat of graphite

We will use the following expression.

Q = c × m × ΔT

c = Q / m × ΔT

c = 1136 J / 402 g × (30°C - 26°C)

c = 0.70 J/g.°C