At which position is the northern hemisphere experiencing winter?


The image includes the position and tilt of Earth in its orbit around the sun. Earth is tilted away from the sun in position A. In position B, the sun shines evenly on Earth from pole to pole. Earth is tilted toward the sun in position C. In position D, the sun shines evenly on Earth from pole to pole.

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Point A

Point B

Point C

Point D

The molarity of the solution of H₃PO₄ needed to neutralize the KOH solution is 0.35 M

H₃PO₄ + 3KOH —> K₃PO₄ + 3H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(Ma × 10.2) / (0.2 × 53.5) = 1 / 3

(Ma × 10.2) / 10.7 = 1 / 3

Cross multiply

Ma × 10.2 × 3 = 10.7

Ma × 30.6 = 10.7

Divide both side by 30.6

Ma = 10.7 / 30.6

Ma = 0.35 M

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Moles of copper

Mass of copper

Now

According to law of conservation of mass

Mass of products=Mass of reactants

The color of the indicator will correspond to the pH values of either acidic or basic substances.

pH values are values which are obtained from taking the negative logarithm to base ten of the hydrogen ions concentration of a substance.

pH values of acidic substances are less than 7 while the pH of basic or alkaline substances are greater than 7.

An indicator is an organic dye which changes colour according to the pH of a substance.

Examples of indicators are methyl orange and phenolphthalein.

Therefore, the color of the indicator will correspond to pglh values of either acidic or basic substances.

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[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Here we go ~

There are 4 carbon atoms in the chain, so it's prefix should be " But " and there are only sigma bonds, therefore the primary suffix will be " ane ", and the functional group attached to the end is " OH " denoting alcohol group, so the secondary suffix will be " ol "

Hence, the name of the compound will be ~

[tex]\qquad \sf  \dashrightarrow \:Butan - 1 - ol[/tex]

or simply

[tex]\qquad \sf  \dashrightarrow \: Butan ol[/tex]

Using the ideal gas equation and Gay Lussac's law, the volume of the passenger's collapsed bottle after landing is 0.0075 L.

The ideal gas equation shows the relationship between temperature, pressure, volume and number of moles.

The volume of the passenger's collapsed bottle after landing is 0.0075 L.

Given that;

PV = nRT

n = PV/RT

Hence:

P = 0.75 atm;

V = 0.5 L;

T = 295 K;

R = 0.082 atmL/K.mol

n = 0.75 * 0.5 / 0.082 * 295

n = 0.015 moles

If the pressure after landing was 1.0 atm;

V1n1 = V2n2

V2= V1n1/n2

V2 = 0.5 L *  0.015 moles/ 1 mole

V2 = 0.0075 L

The volume of the passenger's collapsed bottle after landing is 0.0075 L.

Missing parts;

A passenger on an airplane finished a 0.5 L bottle of water during the flight

and replaced the lid. The cabin pressure and temperature were maintained at

0.75 atm and 295 K during the flight. After landing, he noticed his empty water

bottle had collapsed. (12 points)

i. How many moles of gas were in the water bottle?

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Ion particles are present in water solutions of electrolytes while neutral molecules are present in case of non electrolytes.

Electrolytes are compounds that dissociate into ions when dissolved in a solution, resulting in the solution becoming conductive to electricity. These substances are usually made up of ionic compounds or acids that dissolve in water, producing positively and negatively charged ions. These ions can move freely within the solution and transport electric charge, thereby transforming the solution into a conductor of electricity.

When we talk about water solutions of electrolytes, it's important to note that the solute particles are present in the form of ions. These ions are essentially atoms or molecules that have a net electric charge as a result of gaining or losing electrons. The presence of these charged particles allows for conductivity within the solution, making them capable of carrying an electric charge. Some common examples of electrolytes include table salt (also known as sodium chloride), acids, and bases.

When it comes to solutions in water that contain non-electrolytes, the solute particles are made up of neutral molecules or compounds that lack an overall electric charge and therefore, cannot facilitate electrical conductivity within the solution. Sugar, alcohol, and urea are a few examples of non-electrolytes.

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[tex]2\text{Ca} + \text{O}_2 \rightarrow 2\text{CaO}[/tex]

According to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.

They are the different sets of organs that make up the body, collaborating in each case with the fulfillment of some specific type of functions.

This simultaneous and juxtaposed set of systems involves various organs, ducts, tissues and various glands, all coordinated by endocrine substances and nerve impulses, so as to operate more or less autonomously as the case may be.

Therefore, we can conclude that according to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.

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Answer:

frequency

Explanation:

because a wave is equally a frequency

Answer:

2.2 moles H2O

Explanation:

[tex]35g O_2 \mbox{ \cdot }\frac{1mol}{32g/mol} \mbox{ \cdot }\frac{2mol H_2O}{1mol O_2}= 2.1875[/tex], which rounds to about 2.2

Answer:

the first question's answer is 10.7g and the follow up question is 47.7g.

Explanation:

it makes you drag the object onto the scale and then displays it on the green rectangle.

Answer:

750 g of phosphorus is 750 g of phosphorus

Answer:

a single bond will share 2 electrons

double will share 4

so triple will share 6

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.

Balanced chemical equation:

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

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The pressure of the given moles of propane with the given volume and temperature is 1.024atm.

The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )

Given the data in the question;

PV = nRT

P = nRT / V

P = ( 13mol × 0.08206Latm/molK × 288K ) / 300L

P = 307.23264Latm / 300L

P = 1.024atm

Therefore, the pressure of the given moles of propane with the given volume and temperature is 1.024atm.

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The reaction that is described in the question is a nuclear reaction because a change has occurred in a nucleus.

The term nuclear reaction  has to do with a reaction in which there is a transformation of the nucleus of an atom.

As such, the reaction that is described in the question is a nuclear reaction because a change has occurred in a nucleus.

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Answer:

C

Explanation:

Edge 2022

Answer:

99.6 kpa     (or maybe 124.2 kpa  <======see below)

Explanation:

Assuming constant volume:    ( I also assumed +30 C initial temp)

P1/T1  = P2/T2

T2 * P1/T1 = P2              (T must be in K )

(35 + 273.15) * 98 /(273.15 + 30)  = 99.6 kpa

Just in case this was -30 C to start, the answer would be  124.2 kpa

Atoms are the unit of the molecule of the compound. The 3.01 x 10²⁴  atoms of oxygen are present in 5 moles of water and 3 moles of carbon dioxide in the sample.

Atoms are the smallest fundamental unit of the compounds that can be given by Avogadro's number.

For calculating the oxygen atoms in 5 mole water:

If 1 mole = 6.02 × 10²³

Then, 5 moles = 5 ×  6.02 × 10²³

Hence, 3.01 x 10²⁴ atoms of oxygen are present in 5 moles of water.

Moles of carbon dioxide in the sample is calculated as:

If 1 mole of carbon dioxide = 6.02 × 10²³ molecules

Then moles in 1.8 x 10²⁴ molecules will be,

(1.8 x 10²⁴ molecules) ÷ (6.02 × 10²³ molecules)  = 3 moles

Hence, 3 moles of carbon dioxide is present in the sample.

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Answer:

Frequency of the ultrasonic sound, f=1000kHz=10

6

Hz

Speed of sound in air, V

a

=340m/s

The wavelength (λ

r

) of the reflected sound is given by the relation:

λ

r

=V/f

=340/10

6

=3.4×10

−4

m.

(b) Frequency of the ultrasonic sound, f=1000kHz=10

6

Hz

Speed of sound in water, V

w

=1486 m/s

The wavelength of the transmitted sound is given as:

λ

r

=1486/10

6

=1.49×10

−3

m.

Answer:

-

Explanation:

As the piece of metal skitters across the surface of the water in a beaker and — particularly in the case of potassium — it appears to catch fire, it is not obvious that the explanation for both phenomena lies in the production of hydrogen gas.

Answer: Tree and Grass are the two correct answers here

Explanation:  Producers are photosynthesizing organisms. They are any kind of green plant that make their food by taking sunlight and using the energy to make sugar.

Answer:

Tree, grass

Explanation:

Producers make their own food. Trees and grass can make their own food using sunlight (photosynthesis). Monkey is consumer (eats other things like bananas- made by plants - for survival). Mold (like fungus) eat dead stuff and thus are decomposers (not producers).

Answer:

.0987 moles

Explanation:

Ideal gas law     PV = n RT       R = .082057 L-atm/mol-K

7 ( .347) = n (.082057) (300)       n = .0987 moles

The Intermolecular force is a type of force which exists between particles in an Ideal gas.

Intermolecular forces are considered weaker attractions that hold molecules in gas close together. This force of attraction is present between molecules or particles.

So we can conclude that the Intermolecular force is a type of force which exists between particles in an Ideal gas.

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Answer:

Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

Explanation:

hope it's helps

Answer:

D. K3PO4

Explanation:

K3PO4 would dissolve into 3 potassium ions and one phosphate ions thus total of 4 items added in water. Freezing point is depressed by high amounts of stuff. NaCl would add 2 items (one Na and one Cl). Glucose would not break apart, thus 1 item. MgCl2 would break into One Mg and two Cl ions (thus 3 things.)..

Overall, K3PO4 dissolves into most components, thus would depress the freezin point most.

Answer: A fossil will usually have remains or impressions of an animal or plant.

Answer:

the answer is b

Explanation:

trust me

Answer:

The molecules cannot be compared without knowing the mass.