Lakes, rivers, or springs can form when:

A) limestone dissolves
B) groundwater reaches the surface
C) sand, silt, and clay are deposited
D) rain water seeps into the ground

Answer:

I'm not an expert at this, but I assume its mercury.

Answer:

". It will mark the time since humans began altering Earth. Starting about 10,000 years ago, it is tentatively being called the Anthropocene."

i dont know if tht will help

100,000 years in the geologic history of Earth would be considered

as Anthropocene .

The first and most recent geological epoch in Earth's history when human life began to have a noticeable influence on the planet's climate, including ecosystems, and ecosystems, is referred to as the Anthropocene Epoch. This term refers to an undefined unit of geologic time.

It would be the first time since people started changing the planet. It must be tentatively referred to as the Anthropocene and began around 10,000 years ago.

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Answer:

action, reaction

Explanation:

Answer:

for every action there is an equal and opposite reaction

Answer:Robert Oppenheimer went on to become chairman of the General Advisory Committee of the Atomic Energy Commission, which, in October 1949, opposed the development of the hydrogen bomb. This shocking opposition led to accusations that Oppenheimer was a Communist supporter.

Explanation:

Answer:

H3PO4 is the formula for hydrophosphoric acid

The chemical formula of hydrophosphoric acid is H₃PO₄ which is a mineral acid of phosphorous.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer:

1.1 × 10⁻⁶ M

Explanation:

Step 1: Given and required data

Step 2: Write the balanced equation for the solution reaction of calcium oxalate

CaC₂O₄(s) ⇄ Ca²⁺(aq) + C₂O₄²⁻(aq)

Step 3: Calculate the concentration of the oxalate ion to begin the precipitation of calcium oxalate

We will use the Ksp of calcium oxalate.

Ksp = 2.7 × 10⁻⁹ = [Ca²⁺].[C₂O₄²⁻]

[C₂O₄²⁻] = Ksp / [Ca²⁺]

[C₂O₄²⁻] = 2.7 × 10⁻⁹ / 2.5 × 10⁻³

[C₂O₄²⁻] = 1.1 × 10⁻⁶ M

Kidney stones are the calcareous stones formed in the kidney of the excretory system. The initial concentration of oxalate ion was [tex]1.1 \times 10^{-6} \;\rm M.[/tex]

Concentration is the amount of the substance present in the sample and can be calculated by the solubility constant of the products.

Given,

Concentration of calcium = 2.5mM

The solubility product constant = [tex]2.7 \times 10^{-9}[/tex]

The balanced chemical reaction for calcium oxalate can be written as:

[tex]\rm CaC_{2}O_{4}(s) \leftrightharpoons Ca^{2+}(aq) + C_{2}O_{4}^{2-}(aq)[/tex]

The concentration of oxalate ions by Ksp is calculated as:

[tex]\begin{aligned} [C_{2}O_{4}^{2-}] &= \rm \dfrac {Ksp}{[Ca^{2+}]}\\\\&= \dfrac{2.7 \times 10^{-9}}{2.5 \times 10^{-3}}\\\\&= 1.1 \times 10^{-6}\;\rm M\end{aligned}[/tex]

Therefore, [tex]1.1 \times 10^{-6} \;\rm M[/tex] is the concentration of oxalate ion.

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Answer:

I think that gravity can be considered a force.

Explanation:

As the object falls, it moves faster and faster. Gravity is considered a universal force because it acts between any two masses anywhere in the universe. For example, there is a gravitational pull between the Sun and the Moon. Even small masses attract one another.

Hope this helped! :)

Answer:

B

Explanation:

Answer:

a

Explanation:

because it fits the diagonal trend that point toward the upper right

Answer:

[Ne] 3s² 3p¹

Explanation:

Answer:

λ = 5.68×10⁻⁷ m

Explanation:

Given data:

Energy of photon = 3.50 ×10⁻¹⁹ J

Wavelength of photon = ?

Solution:

E = hc/λ

h = planck's constant = 6.63×10⁻³⁴ Js

c = 3×10⁸ m/s

Now we will put the values in formula.

3.50 ×10⁻¹⁹ J =  6.63×10⁻³⁴ Js × 3×10⁸ m/s/ λ

λ =  6.63×10⁻³⁴ Js × 3×10⁸ m/s / 3.50 ×10⁻¹⁹ J

λ =  19.89×10⁻²⁶ J.m / 3.50 ×10⁻¹⁹ J

λ = 5.68×10⁻⁷ m

Answer:

0.00121 atm

Explanation:

Step 1: Given data

Step 2: Calculate the pressure exerted by the column of water in SI units

The pressure exerted by the column of liquid depends on the height of the column, the density of the liquid and the gravitational constant. We can calculate it using the following expression.

P = ρ × g × h

P = 1.00g/cm³ × 9.80665 m/s² × 12.5 m

P = 123 Pa

Step 3: Convert "P" to atm

We will use the conversion factor 101325 Pa = 1 atm.

123 Pa × (1 atm/101325 Pa) = 0.00121 atm

Answer:

a. 100%

b. 133%

c. 300%

Explanation:

To find yield first we need to determine theoretical yield converting each reactant to moles and find limitng reactant for each reaction:

Moles A:

4.5g * (1mol / 150g) = 0.03 moles

Moles B:

4.0g * (1mol / 100g) = 0.04 moles

a. For a complete reaction of 0.03 moles of A are needed:

0.03 moles A * (1 mole B / 3 moles A) = 0.01 moles of B

As there are 0.04 moles of B, A is limiting reactant.

Theoretical moles and mass of C are:

0.03 moles A * (1 mole C / 3 moles A) = 0.01 moles of C.

0.01 moles of C * (200g / mol) = 2g are produced.

Yield is:

2g / 2g * 100 = 100%

b. For a complete reaction of 0.03 moles of A are needed:

0.03 moles A * (3 mole B / 2 moles A) = 0.045 moles of B

As there are 0.04 moles of B, B is limiting reactant.

Theoretical moles and mass of C are:

0.04 moles B * (1 mole C / 3 moles B) = 0.0133 moles of C.

0.0133 moles of C * (200g / mol) = 2.67g are produced.

Yield is:

2.67g / 2g * 100 = 133%

c. For a complete reaction of 0.03 moles of A are needed:

0.03 moles A * (1 mole B / 1 moles A) = 0.03 moles of B

As there are 0.04 moles of B, A is limiting reactant.

Theoretical moles and mass of C are:

0.03 moles A * (1 mole C / 1 moles A) = 0.03 moles of C.

0.03 moles of C * (200g / mol) = 6g are produced.

Yield is:

6g / 2g * 100 = 300%

Answer:

choice A

Explanation:

it it occurs when a gas escapes from a container through a hole of diameter.

Answer:

A. It occurs when a gas passes through a tiny hole.

Explanation:

Edge2020

Have a great day y'all :)

Answer:

maybe try to do something with electricity?

Explanation:

give me an update on when u find one :) cant wait to see it

Answer: Bromine water

Explanation:

Alkanes are saturated hydrocarbons with single bond and the alkenes as unsaturated hydrocarbons with double bonds.

Bromine water is a chemical reagent which is used to distinguish between alkane and alkene.

It is of orange color in solution form and turns to colorless in alkene.

The alkanes to show any reaction with bromine water.

Answer:

Metal, Copper, and Alluminum

Explanation: It is what it is

Answer:

4.2x10⁻⁴ M or 0.032 g/L.

Explanation:

Hello!

In this case, for solubility product problems, we apply the concepts of equilibrium because an insoluble salt is ionized until a certain point limited by the solubility product constant, Ksp. Thus, we first write the ionization reaction of aluminum hydroxide at equilibrium:

[tex]Al(OH)_3(s)\rightleftharpoons Al^{3+}(aq)+3OH^-(aq)[/tex]

Next, we write the corresponding equilibrium expression:

[tex]Ksp=[Al^{3+}][OH^-]^3[/tex]

Which in terms of [tex]x[/tex], the reaction extent, is:

[tex]Ksp=x*(3x)^3[/tex]

Because [tex]x[/tex] also represents the molar solubility of aluminum hydroxide at the considered temperature; now, we can write:

[tex]8.1x10^{-13}=x*(3x)^3[/tex]

Which can be solved for x as follows:

[tex]x=\sqrt[4]{\frac{8.1x10^{-13}}{27} } \\\\x=4.2x10^{-4}M[/tex]

Thus, the solubility is 4.2x10⁻⁴ M or mol/L and in g/L we have:

[tex]4.2x10^{-4}\frac{mol}{L}*\frac{78g}{1mol} =0.032\frac{g}{L}[/tex]

Best regards!

Answer:

Explanation:

A genus is a group that includes a number of very closely related species; a species within a genus includes populations of organisms that can potentially interbreed.

Answer:

urorrr

Explanation:

hahhahahahahhaahah oki nam omy mymy mymy

Answer:

ionic radii is a half the distance between two ions

Explanation:

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Answer:

[tex][Cu^{2+}]=0.041 M[/tex]

Explanation:

Hello!

In this case, since the molarity of a solution is defined in terms of the moles of the solute and the volume of solution, given that the concentration of Cu(NH₃)₄²⁺ is 0.041 M, and there is only one copper atom per Cu(NH₃)₄²⁺ ion, we can compute the concentration of Cu²⁺ as shown below:

[tex][Cu^{2+}]=0.041\frac{molCu(NH_3)_4^{2+}}{L}*\frac{1molCu^{2+}}{1molCu(NH_3)_4^{2+}} =0.041 \frac{molCu(NH_3)_4^{2+}}{L}[/tex]

[tex][Cu^{2+}]=0.041 M[/tex]

Best regards!

Answer:

Propionic acid reacts with NaOH(aq) to form sodium propionate and water.

Explanation:

.

Answer:

C

Explanation:

CO2 is a molecule because it is compose of atoms which made it a molecule, it can also be call a compound.

Answer:

I believe it is c. Molecule, Pure compound

Explanation:

this is because it is composed of atoms which create molecule.

Answer:

Explanation:

Chemicals to produce NH₃ ( ammonia )

1 ) Ammonium chloride ( NH₄Cl )

2 ) Calcium hydroxide  Ca(OH)₂

2NH₄Cl + Ca(OH)₂ = CaCl₂ + 2NH₃ + 2H₂O.

Net Ionic equation

2NH₄⁺ ( aq ) + 2OH⁻ (aq )  = 2NH₃(g)  + 2H₂O .

Answer: multiple approaches yield the same result positively contributes to the development of a theory since it shows that the conclusions are sound and not based on other factors such as the environment of the experiment, the researches, etc.

Answer:

I'm not positive this is the answer but my guess  would be C: Evidence from multiple approaches might prevent a poorly developed theory from being accepted.

Answer:

Explanation:

29.4 mL of nitric acid having molarity of .187M reacts with 22.7 mL of potassium hydroxide .

moles contained in nitric acid solution

= .0294 x .187 moles

= 5.5 x 10⁻³ moles

This must have been reacted with same amount of moles of base

moles of sodium hydroxide in 22.7 mL of solution = 5.5 x 10⁻³ moles

molarity of base solution = 5.5 x 10⁻³ / 22.7 x 10⁻³

= .24 M .

Answer:

N = 5.8 × 10²⁴ molecules

Explanation:

Step 1: Given and required data

Step 2: Calculate the number of molecules (N) in 9.6 moles of C₂H₄

To convert moles to molecules we need Avogadro's number: there are 6.02 × 10²³ molecules of C₂H₄ per mole of C₂H₄

N = n × NA

N = 9.6 mol × 6.02 × 10²³ molecules/mol

N = 5.8 × 10²⁴ molecules

Answer:

3

Explanation: