Please answer it truthfully please​

Answer:

Im pretty sure its hydrocarbon

Explanation:

Answer:

4. b 5.C

Explanation:

Photosynthesis makes sugar for plants and sunlight is the energy used to convert CO2 and water into glucose

The product of the process of photosynthesis is sugar and the energy to dive the process of photosynthesis comes from sunlight.

Photosynthesis is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy  through the process of cellular respiration.

Some of the energy which is converted  is stored in molecules of carbohydrates like sugar and starches  which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis  are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.

The process begins with proteins absorbing light energy  which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.

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Answer: C. Model A shows the three-dimensional shape of the molecule, but Model B does not.

Explanation:

i took the test and it makes the most sence for the modeles.

Answer:

Conduction, Convection, and Radiation

Explanation:

I got it right on Edge 2021

the The fill in the blanks should be filled with Conduction, Convection, and Radiation

information regarding heat:

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Answer:

The hair color of a person

Explanation:

The correct answer would be the hair color of a person.

Qualitative data are data that cannot be measured with any instrument but can only be used to characterize. Unlike quantitative data, these kinds of data can only be observed and recorded but cannot be assigned numerical values, except if coded.

The sound of a person's voice can be quantitative on one hand and qualitative on the other. The intensity of a sound can be measured using a decibel meter and quantitatively assigned a figure, whereas, the quality of the sound can only be characterized and not measured.

Both the weight and the body temperature of a person can be measured using a weighing balance and a thermometer respectively and hence, are considered to be quantitative data when collected.

The color of the hair of a person cannot be measured but can only be observed and characterized. Hence, hair color data constitute qualitative data.

Answer:

hair color

Explanation:

Answer:

75%

Explanation:

3/4 is 75% if you multiply by 25

The equilibrium constant (K) : 11.85

Given

Reaction

N₂(g) + 3H₂(g) ⇒ 2NH₃(g)

Required

K(equilibrium constant)

Solution

The equilibrium constant (K) is the value of the concentration product in the equilibrium

The equilibrium constant based on concentration (K) in a reaction  

pA + qB -----> mC + nD  

[tex]\tt K=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]

For the reaction above :

[tex]\tt K=\dfrac{[NH_3]^2}{[N_2][H_2]^3}\\\\K=\dfrac{0.1^2}{0.25\times 0.15^3}\\\\K=11.85[/tex]

MgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)

The electrolyte in the solution produces ions.

The equation of a chemical reaction can be expressed in the equation of the ions

For strong electrolytes (the ionization rate = 1) is written in the form of separate ions, while the weak electrolyte (degree of ionization <1) is still written as an un-ionized molecule

In the ion equation, there is a spectator ion that is the ion which does not change (does not react) because it is present before and after the reaction

When these ions are removed, the ionic equation is called the net ionic equation

For gases and solids including water (H₂O) can be written as an ionized molecule

A molecular equation is a chemical equation expressed as a molecule

So only the dissolved compound is ionized ((expressed in symbol aq)

Reaction

MgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)

Mg²⁺(aq)+2Br⁻(aq) + Pb²⁺(aq)+2NO₃⁻(aq)⇒PbBr₂(s) + Mg²⁺(aq)+2NO₃⁻(aq)

spectator ions : Mg²⁺(aq) and 2NO₃⁻(aq)

2Br⁻(aq) + Pb²⁺(aq)⇒PbBr₂(s)

The balanced molecular equation:

MgBr₂(aq) + Pb(NO₃)₂(aq) → PbBr₂(s) + Mg(NO₃)₂(aq)

The  complete ionic equation:

Mg²⁺(aq)+2Br⁻(aq) + Pb²⁺(aq)+2NO₃⁻(aq)⇒PbBr₂(s) + Mg²⁺(aq)+2NO₃⁻(aq)

The net ionic equation

2Br⁻(aq) + Pb²⁺(aq)⇒PbBr₂(s)

A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element. A reaction that contains the stoichiometric ratios of the reactants and products; these ratios can be used for mole -to-mole conversions.

Thus, the reactions when a magnesium bromide solution is mixed with a lead(II) nitrate solution, a precipitate forms is given above.

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40567⁰ kkkkkkkkkkkkkkkkkkkkkkmeow

Explanation:

cuz I got a 100

Answer:

Water vapor retains the same heat energy.

Answer:

water vapor gives up heat energy.

Explanation:

Took a quiz and got it right

Use this formula PV=nRT

Rearrange formula , question want V ,so

V=nRT/P

given

P= 3.00 atm

n=0.450 moles

R is ideal gas constant = 0.08206 L atm mol-¹K-¹

T in Kelvin so , (75 + 273)= 348 Kelvin (K)

Then insert all this information given with that rearranged formula V=nRT/P

Answer:

I dont get it what am i supposed to do?

Explanation:

Answer: Since k2 corresponds to 64 hours, the time for the milk to sour at 40 C is 64 h / 9.38 = 6.8 hours.

Explanation:

At temperature T1, the Arrhenius Equation is:

k1 = Ae^(-Ea/RT1).

An equivalent equation can be written at T2:

k2 = Ae^(-Ea/RT2).

If these equations are divided, then A cancels:

k1/k2 = e^(-Ea/RT1)/e^(-Ea/RT2)

Taking the natural log:

ln(k1/k2) = (Ea/RT2)-(Ea/RT1);

or:

ln(k1/k2) = (Ea/R)(1/T2 - 1/T1)

We can infer from the question that the milk sours 3 times as fast at the higher temperature (let's call it T1), so we can arbitrarily call k2 = 1 and k1 = 3.

a) Substitute:

ln(3) =  (Ea/R)(1/276.15 K - 1/293.15 K).

We get Ea/R = 5231.6. Multiply this by whatever value of R you choose to get Ea in your favorite energy unit. Remember the sig figs.

b) Again, let's let the lower temperature = T2, since we have defined k2 = 1:

ln(k1) = (5231.6)(1/276.15 K - 1/313.15);

ln(k1) = 2.24, so k1 = 9.38.

Since k2 corresponds to 64 hours, the time for the milk to sour at 40 C is 64 h / 9.38 = 6.8 hours.

The seedlings exerted an upward pushing force on the soil explains why the

seeds emerged from the soil.

Bob watered the soil in which the seed absorbs the water through the coat ,

the seed coat and embryo begins to enlarge and emerge from the soil.

The hydrated enzymes become active thereby increasing metabolic

activities and energy production which is needed for the growth of the plant.

The energy helps the seed exert an upward force on the soil.

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The relative humidity on a starry summer night is determined as 91%.

The dry bulb depression temperature is calculated as follows;

ΔT = 19⁰C - 18⁰C   =  1⁰C

at dry bulb temperature of 18⁰C and depression temperature of 1⁰C, the relative humidity is determined as 91%.

Thus, the relative humidity on a starry summer night is determined as 91%.

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Explanation:

Rate of reaction can be increased by having more surface area.

Therefore,

Option B is correct✔

Answer:

b

Explanation:

Answer:

See explanation

Explanation:

The equation of the reaction is;

C 2 H 6 O(l)  +  3 O 2 (g)  → 2 CO 2 ( g )  +  3 H 2 O(l )

Next we have to determine the limiting reactant, this reactant gives the least number of moles of product.

Number of moles of C 2 H 6 O = mass/molar mass = 1.86g/ 46.07 g/mol = 0.04 mols

From the equation;

1 mol of ethanol yields 2 mols of CO2

0.04 moles of ethanol yields 0.04 * 2/1 = 0.08 mols of CO2

For water;

1 mol of ethanol yields 3 mols of water

0.04 moles of ethanol yields 3 * 0.04/1 = 0.12 mols of water

Also;

Number of moles of oxygen= 10g/32g/mol = 0.31 moles

3mols of O2 yields 2 moles of CO2

0.31 moles of O2 yields 0.31 * 2/3 = 0.21 moles of CO2

For water;

3 moles of O2 yields 3 moles of water

0.31 moles of O2 yields 0.31 * 3/3 = 0.31 moles of water

Hence ethanol is the limiting reactant.

From  PV=nRT

Volume of CO2 is;

V = nRT/P

V = 0.08 * 0.082 *298/1 = 1.95 L

Volume of water;

V = nRT/P

V= 0.12 * 0.082 * 298/1

V= 2.93 L

Total volume of gases after reaction = 1.95 L + 2.93 L = 4.88 L

Answer:

0.97 atm.

Explanation:

From the question given above, the following data were obtained:

Final pressure (P2) = 6.8 atm

Initial temperature (T1) = 40 K

Final temperature (T2) = 280 K

Initial pressure (P1) =?

Thus, we can obtain the initial (original) pressure of the gas as follow:

P1/T1 = P2/T2

P1 /40 = 6.8/280

Cross multiply

P1 × 280 = 40 × 6.8

P1 × 280 = 272

Divide both side by 280

P1 = 272/280

P1 = 0.97 atm

Therefore, the original pressure of the gas is 0.97 atm.

Answer:

1+2=2+1 is the answer for the question

Explanation:

Given -

molar mass = 135.13 g/mol

To Find -

Solution:

we know that -

So,

Here empirical mass =

12.01 + 1.008 + 14.01 = 27.028

Then,

135.13 = n × 27.028

n = 4.99 ≈ 5

We know that,

Then,

molecular formula = 5(CHN)

= C₅H₅N₅

Therefore,

Option A is correct✔

Answer:

3

2

Explanation:

3O2 => 2O3

the equation is balancing

Answer:

ooooooooooppppppppppppppppppppppppp

Explanation:

Answer:

c I think but that's only what i think

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 24.088×10²³ atoms of carbon are in sample containing 4.000 moles of carbon. The correct option is option B.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of atoms/molecules/ formula units of carbon= number of moles of carbon × 6.022×10²³

number of moles of carbon= 4 moles

substituting all the given values in the above equation, we get

number of atoms/molecules/ formula units of carbon= 4 × 6.022×10²³

number of atoms/molecules/ formula units of carbon=2.4088×10²⁴ atoms of carbon

There are 2.4088×10²⁴ atoms of carbon

Therefore, 24.088×10²³ atoms of carbon are in sample containing 4.000 moles of carbon. The correct option is option B.

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The chemist weigh out 35.51 g Na2SO4

Given

0.250 moles of Na2SO4

Required

weight of Na2SO4

Solution

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Moles of a substance can also be determined from its molecular weight

[tex]\tt mol=\dfrac{mass}{MW}[/tex]

For 0.250 moles of Na2SO4, mass =

[tex]\tt mass=mol\times MW\\\\mass=0.25\times 142,04 g/mol\\\\mass=35.51~g[/tex]

The equation is balanced. There are 4 aluminium atoms and 6 oxygen atoms on each side.

Answer:

Propane gas plus oxygen gas produces water and carbon dioxide.

Explanation:

This is the initial chemical equation: C3H8 + O2 = CO2 + H2O

This is the balanced chemical equation: C3H8 + 5 O2 = 3 CO2 + 4 H2O

C3H8 + O2 → CO2 + H2O

C3H8 + 5O2 → 3CO2 + 4H2O

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Answer:

Explanation: