2. Which was the independent variable in the experiment below? *
3 points

A. Amount of light
B. Soil type
C. Temperature
D. Health of plant

Answer:

A. To study the chemical composition of the surface of a planet

Explanation:

Strictly speaking, a spectrometer is any instrument used to view and analyze a range (or a spectrum) of a given characteristic for a substance (for example, a range of mass-to-charge values as in mass spectrometry), or a range of wavelengths as in absorption spectrometry like nuclear magnetic radiation spectroscopy

-hope this helps!

Answer:

Water and Salts

Explanation:

Because a neutralization reaction, which results in the formation of salt and water, occurs when an acid and a base react with one another. The H + ions from the acid and the OH - ions from the base combine to form water. As a result of the reaction, a solution with a neutral pH (pH = 7) is produced as the strong acids and strong bases completely dissociate.

Answer:

A 6.0

Explanation:

Answer:

V1/T1 = V2/T2 (Charles' Law)

T is in Kelvin. Celsius temp plus 273.15 = K

T1 = 14 +273

= 287 K

T2 = 29 + 273

= 303 K

4.5 / 287 = V2 / 303

V2 = 4.75 L

= 4.8 L

Answer:A solar flare is an intense burst of radiation coming from the release of magnetic energy associated with sunspots. Flares are our solar 

Explanation:

Mass defect is define as the difference between nuclear mass and the mass of its components.

As the name suggested that defect in mass of any substance given idea about the mass defect and it will be define as the difference between the atomic mass of an atom and sum of the masses of all constitute particles present inside the nucleus.

Hence it is the difference between nuclear mass and the mass of its

components.

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In the given reaction, the substance that is the base of the reaction is [tex]CaSO_4[/tex]. The correct option is C.

The base is a slippery liquid that is bitter and turns red litmus paper to blue.

Bases react with acids to form salts.

Then bases have pH above 7.

Examples of bases are calcium carbonate, sodium hydroxide, etc.

Thus, the correct option is C.

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Answer:

D. Ca(OH)2 (aq)

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.

Explanation:

please consider as brainlest if i helped you

usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.

The oxidation number for sulphur (S) in the given compound sulphur trioxide (SO₃) is +6.

Oxidation number of any element is define as the number of exchangeable electrons from the outermost shell of an element.

For the given compound SO₃ no charge is present on the whole molecule and oxidation state of oxygen atom is -2, and let we assume that the oxidation state of sulphur atom is x and we calculate for x as:

x + 3(-2) = 0

x - 6 = 0

x = +6

Hence the oxidation state of atom is +6.

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The answer is D: 6+

Worked for me on EDGE 2023

Answer:

saturated solution

Explanation:

Answer:

The equilibrium concentrations are [N₂O] = 1.00 mol/L; [O₂] = 0.50 mol/L; [NO] = 1.00 mol/L. Kc = 2.0.

Explanation:

First, write the balanced chemical equation with an ICE table.2N₂O + O₂ ⇌ 4NOI/mol·L⁻¹: 0; 0; 3.00C/mol·L⁻¹: +2x; +x; -4xE/mol·L⁻¹: 2x; x; 3.00 - 4xAt equilibrium, [N₂O] = 2x mol/L= 1.00 mol/L.So x = 0.50Then [O₂] = x mol/L = 0.50 mol/Land [NO] = (3.00 - 4x) mol/L = (3.00 – 4×0.50) mol/L = 1.00 mol/LKc=[NO]4[N2O]2[O₂]=1.0041.002×0.50 = 2.0

The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.  

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.

The balanced chemical equation for the reaction has been:

[tex]\rm Mg(OH)_2+2HNO_3-- > Mg(NO_3)_2+H_2O[/tex]

The net ionic equation has been given as the ionic form of the reactants and product that has been formed in the reaction. The ions same on the product and reactant side of the equation has been eliminated in the net ionic equation.

The net ionic equation for the given chemical reaction has been:

[tex]\rm Mg^{2+}+OH^++2H^++2NO^{-}_3-- > Mg^{2+}+NO^{-}_3+2H_2O\\\\OH^{-}+2H^+-- > 2H_2O[/tex]

The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.  Thus, option A is correct.

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Answer:

A on edge

Explanation:

Just trust

We need M2

Answer:

22g of copper?

Explanation:

Answer: B.

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Mark me brainliest please.

Answer:

Large hollow-shaped molecules of hexagonal carbon rings

Explanation:

looks like a soccer ball

wikipedia

Answer:

321 g

Explanation

All you need to know here is that the molarity of a solution tells you the number of moles of solute present in exactly

1 L

of the solution.

In your case, a

2.20-M

sodium chloride solution will contain

2.20

moles of sodium chloride, the solute, for every

1 L

of the solution.

So if every

1 L

of this solution must contain

2.20

moles of sodium chloride in order for the solution to have a molarity of

2.20 M

, it means that

2.50 L

of this solution must contain

2.50

L solution

⋅

2.20 moles NaCl

1

L solution

=

5.50 moles NaCl

To convert the number of moles of sodium chloride to grams, use the molar mass of the compound.

5.50

moles NaCl

⋅

58.4 g

1

mole NaCl

=

321 g

−−−−−

The answer is rounded to three sig figs.

Answer:

The answer is C and E

Explanation:

I just had that question

Answer:

c and e

Explanation:

Answer:

im not 100% sure but i think it is :A

Explanation:

Answer:

Our differences make us special.

Explanation:

Answer:

3.24

Explanation:

It is known that nitric acid is a strong acid, so it will dissociate completely, resulting in [tex]H^+[/tex] and [tex]NO_3^-[/tex] ions being present in solution. We also know that pure water has a neutral pH due to the chemical equilibrium of [tex]H_2O(l)[/tex] ⇄ [tex]H^+(aq) + OH^-(aq)[/tex] signifying equal parts of hydrogen and hydroxide ions.

Now, we must convert from 4.5 moles of nitric acid to moles of hydrogen. This can be accomplished using unit conversions and the chemical dissociation equation [tex]HNO_3(s) - > H^+(aq) + NO_3^-(aq)[/tex]

[tex]4.5molHNO_3 * \frac{1 mol H}{1 mol HNO_3} = 4.5molH+[/tex]

Then, using the pH equation [tex]-log[H+] = pH[/tex] and the formula for molarity [tex]M = \frac{g}{L}[/tex], we can find the value of [tex][H^+][/tex] and in turn the pH of the resulting solution. Keep in mind that both answers for grams of the hydrogen ion and molarity of the hydrogenion should have two significant figures.

[tex]4.5mol H^+ * \frac{1.01gH^+}{1 mol H^+} = 4.6g H^+\\\frac{4.6gH^+}{8000L sol} = 5.8*10^{-4} M H^+[/tex]

Now the pH equation may be used.

[tex]-log(5.8*10^{-4}) = 3.24[/tex]

Note that logarithmic significant figures dictate that the logarithm of a number with x significant figures will result in a value with x digits after the decimal point, meaning that this answer will have two digits after the decimal point and three significant figures.

Answer:

2.28 atm

Explanation:

According to Dalton's law of partial pressures the total pressure is equal to the sum of all of the partial pressures. Basically, just add the individual partial pressures to get the total pressure.

1.00+.29+.99=2.28atm total pressure

Answer: is the chemical compound that contains one oxygen atom and one other element in it chemical formular

Explanation:

Oxide - is a binary compound of oxygen with a more electropositive element or group

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Answer:

See below ↓↓↓↓

Explanation:

1)

a)

b)

c)

d)