(giving away 10 points)at what position of the earth in its orbit is it summertime in the northern hemisphere
Position 2
position1
position4
position3

Answers

Answer 1

Answer:

Answer: Position 1

Explanation:

Seasons on Earth occur due to tilt of of its axis. Earth's axis is tilted 23.5° from horizontal. Thus, when Earth moves in the orbit around sun, sometimes the northern hemisphere points towards the Sun and sometimes away. When it points towards the Sun, it experiences Summer season and while it points away, winter occurs. In between, spring and autumn occur.

Thus, from the given diagram, norther hemisphere would have summer time at position 1 when the northern hemisphere is facing the Sun.

Answer 2

Answer:

Answer:

The correct answer is Position 1.

Explanation:

The rotational motion of the Earth causes some parts to receive more heat from the sun, while others receive less. Its axis of rotation runs vertically from the North Pole to the South Pole. Since this axis is not completely vertical, the sun's rays are projected with different intensity during the translation movement. Since the Earth is tilted slightly to the left and the axis points to the side where the Sun is at position 1, the sun's rays reach the northern hemisphere with more intensity and the southern hemisphere with less intensity.

Have a nice day!

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Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25-L sample of pure glycerol has a mass of 4.10 X 10^3 g. What is the density of glycerol in g/cm^3?

Answers

Answer: The density of glycerol will be $1.26cm^3$

Explanation:

Density is defined as the mass contained per unit volume.

$Density=(mass)/(Volume)$

Given : Mass of glycerol= $4.10* 10^3$ g

Volume of bromine = 3.25 L= $3250cm^3$ $(1L=1000cm^3)$

Putting in the values we get:

$Density=(4.10* 10^3g)/(3250cm^3)=1.26g/cm^3$

Thus density of glycerol will be $1.26cm^3$

The density of glycerol used in cosmetics and soaps is 1.26 g/cm³.

FURTHER EXPLANATION

Density is the measure of the compactness of a material. It is the mass per given volume. This can be expressed mathematically as:

$Density = (mass)/(volume)$ (equation 1)

To solve the problem, we first sort the given in the problem:

mass = 4.10 × 10³ g

volume - 3.25 L

The problem is asking for the density in units of g/cm³ which means that we must first convert the volume from liters to cm³.

$volume \ (in \ cm^3) = 3.25 \ L * (1000 \ mL)/(1 \ L) * (1 \ cm^3)/(1 \ mL)\nvolume \ (in \ cm^3) = 3250 \ cm^3$

Now we can plug in the values of mass and volume into equation 1:

$Density = (4.10 * 10^3 \ g)/(3250 \ cm^3)\n\nDensity = 1.2615 (g)/(cm^3)$

Since the given in the problem both have 3 significant figures, the final answer must also have three significant digits only. Therefore,

$\boxed {Density = 1.26 (g)/(cm^3)}$

The density of glycerol is greater than 1, so when mixed with water it will sink.

LEARN MORE

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Keywords: Density, Mass, Volume, Unit Conversion

approximately how many grams of sodium chloride (NaCl) are required to prepare 500. mL of 3.00 M solution

Answers

87.75 grams of sodium chloride (NaCl) are required to prepare 500. mL of 3.00 M solution.

What is Mole?

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Volume of NaCl = 500ml

Concentration = 3M

Moles = Concentration × volume

= 3 × 0.5

= 1.5 moles

Mass = moles × molar mass

= 1.5 × 58.5

= 87.75 g

Therefore, 87.75 grams of sodium chloride (NaCl) are required to prepare 500. mL of 3.00 M solution.

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3.00 M means 3.00 mol/L. So if you want 500 mL=0.5 L, it needs 3.00 mol/L * 0.5 L = 1.50 mol. For NaCl, the molar mass is 23+35.5=58.5 g/mol. So the amount of NaCl needed is 1.50*58.5=87.75 g. So the answer is 87.75 grams.

Is selenium tetrafluoride an ionic or covalent bond?

Answers

Final answer:

Selenium tetrafluoride (SeF4) is a molecule characterized by a covalent bond, not an ionic bond. This bond is formed by the sharing of electron pairs between selenium and fluorine atoms.

Explanation:

The question we have here asks, Is selenium tetrafluoride an ionic or covalent bond?

Selenium tetrafluoride, otherwise known as SeF4, is a molecule formed by the chemical bonding of selenium and fluorine. This bonding is not ionic in nature, but covalent. When you hear the term covalent bond, it refers to a bond formed by the sharing of electron pairs between atoms. Here, selenium and four fluorine atoms share their electrons, therefore creating a molecule of selenium tetrafluoride via a covalent bond.

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Final answer:

Selenium tetrafluoride (SeF4) is a covalent bond because it involves the sharing of electrons between two nonmetals, selenium and fluorine. This contrasts ionic bonds, which typically involve a metal donating electrons to a nonmetal.

Explanation:

Selenium tetrafluoride, identified by the chemical formula SeF4, is a type of covalent bond. This classification is due to the fact that selenium and fluorine are both nonmetals. In chemistry, when two nonmetals form a compound, they usually share electrons, resulting in a covalent bond. The electrons are shared because each atom wants to achieve a stable setup, often attained with a full outer shell. Therefore, these compounds are described as covalent or molecular. An example of an ionic bond, on the other hand, involves a metal and a nonmetal. In this type of bond, the metal will lose electrons to become a positively charged cation, while the nonmetal will gain these same electrons to become a negatively charged anion.

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Which type of reaction occurs in the following? 2HgO(s) 2Hg(l) + O2(g)A.a decomposition reaction in which a metal is reduced
B.an acid-base neutralization reaction to produce oxygen gas
C.a displacement reaction involving two metals
D.a combustion reaction involving burning a metal in oxygen

Answers

In this reaction, reactant HgO decomposed into more than one products and reaction is called decomposition. Hg in HgO has oxidation number of +2 whereas oxidation number of Hg in product side is zero( zero because Hg is in its elemental form) so Hg is reduced. Hence option A is correct.

what is decomposition ?

Decomposition can be defined as the “to break down” of complex substance or organic matter into a simpler inorganic matter.

It is one of the essential processes of the ecosystem, decomposition is a metabolic process which take up raw materials in the form of complex compounds, processing it and then converting it into simpler compounds.

some of the Bacteria, fungi and a few other microorganisms are involve in the process of decomposition as feed on dead organisms to survive.

in this process decaying and dead animals and plants serve as the raw materials undergo breakdown process and produces nutrients, carbon dioxide, and water; Microbes which involve in this process collectively known as saprophytes.

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In this reaction, reactant HgO decomposes into more than one products hence reaction is called decomposition.Hg in HgO has oxidation number of +2 whereas oxidation number of Hg in product side is zero( zero because Hg is in its elemental form) so Hg is reduced. Hence A is correct option.

When the equation H2S + HNO3 → S + NO + H2O is balanced, what is the coefficient for H2O?

Answers

It isn't balanced. You have 3 *H and 3 * O, so something in the first formula must be changed. Have been searching for 1 hour and can't find the answer.

the answer is not 3 but i am guessing 6 please let me know

Determine which elements or compounds are products in the follow reaction equation: calcium + chlorine → calcium chloride A. calcium, chlorine, and calcium chloride B. calcium C. calcium and chlorine D. calcium chloride Reset Selection

Answers

Answer: D. calcium chloride

Explanation:

In reaction equations, reactants are on the left side of the arrow and products are on the right side of the arrow. So, our reactants are the elements calcium and chlorine, and our product is the compound calcium chloride.

I hope this helps! :)

Final answer:

In the given chemical reaction equation, the product is calcium chloride as it is formed from the reaction of calcium and chlorine.

Explanation:

In a chemical reaction, substances that are formed as a result of the reaction are known as products. In the given chemical equation, calcium (Ca) reacts with chlorine (Cl2) to produce calcium chloride (CaCl2). Therefore, in this reaction equation, the product is calcium chloride. The reactants, substances that exist before the reaction, are calcium and chlorine. So, the correct answer to your question is D. calcium chloride.