How does heat from the Sun turn liquid water into a gas called water vapor?

Answer:

A Valence electron are the electrons in the outermost shell or energy level of an atom.

Answer: Yes, sulfuric acid is highly soluble in water.

Explanation:

Answer:

The name Tyrannosaurus rex means "king of the tyrant lizards.

Explanation:

tyranno" means tyrant in Greek; "saurus" means lizard in Greek, and "rex" means "king" in Latin. In 1905, Henry Fairfield Osborn, president of the American Museum of Natural History at the time, named Tyrannosaurus rex. T.

Answer:

What does the name Tyrannosaurus rex mean Tyrannosaurus is Greek for lizard and rex means king in Latin So Tyrannosaurus rex was King of the  Lizards

Explanation:

Answer: 140

Explanation:

Given the following :

Mass of metal = 18g = 0.018kg

Mass of water (calorimeter) = 21g = 0.021kg

Initial temperature of metal = 273 + 96 = 369k

Initial temperature of water = 273 + 24 = 297k

Final temperature inside calorimeter = 273 + 26 = 299k

Temperature change of metal = 299 - 369= -70k

Temperature change of water = 299 - 297 = 2k

H = mc ΔT

m = mass

c = specific heat capacity

ΔT = change in temperature

Heat lost by metal = heat gained by water

mc ΔT = mc ΔT

Specific heat capacity of water = 4200

18 * C * ( 299 - 369 ) = 21 * 4.2 * ( 299 - 297)

0.018 × C × -70 = 0.021 × 4.2 × 2

- 1.26 × C = 0.1764

C = 176.4/1.26

C = 140

Answer:

ok what is new. ........,,,,,

Answer:

A = 1.627 ×10²³ molecules of CF₂Cl₂.

B = 809.4 ×10²³ molecules of Fe(NO₃)₂.

C = 0.03117 ×10²³ molecules of C₈H₁₈.

D= 1116 ×10²³ molecules of CaO.

Explanation:

A)

Given data:

Mass of CF₂Cl₂ = 32.66 g

Number of moles = ?

Number of molecules = ?

Solution:

Number of moles = mass/ molar mass

Number of moles = 32.66 g/ 120.9 g/mol

Number of moles = 0.2701 mol

Number of molecules:

1 mole = 6.022×10²³ molecules

0.2701 mol×6.022×10²³ molecules / 1mol = 1.627 ×10²³ molecules of CF₂Cl₂.

B) Given data:

Mass of Fe(NO₃)₂ = 24.2 Kg  (24.2×1000 = 24200 g)

Number of moles = ?

Number of molecules = ?

Solution:

Number of moles = mass/ molar mass

Number of moles = 24200 g/ 180 g/mol

Number of moles = 134.4 mol

Number of molecules:

1 mole = 6.022×10²³ molecules

134.4 mol×6.022×10²³ molecules / 1mol =809.4 ×10²³ molecules of Fe(NO₃)₂.

C) Given data:

Mass of C₈H₁₈= 0.5912 g

Number of moles = ?

Number of molecules = ?

Solution:

Number of moles = mass/ molar mass

Number of moles = 0.5912 g/ 114.22 g/mol

Number of moles = 0.005176 mol

Number of molecules:

1 mole = 6.022×10²³ molecules

0.005176 mol×6.022×10²³ molecules / 1mol =0.03117 ×10²³ molecules of C₈H₁₈.

D) Given data:

Mass of CaO = 104 Kg  (104×1000 = 104,000 g)

Number of moles = ?

Number of molecules = ?

Solution:

Number of moles = mass/ molar mass

Number of moles = 104,000 g/ 56.1 g/mol

Number of moles = 1854 mol

Number of molecules:

1 mole = 6.022×10²³ molecules

1854 mol×6.022×10²³ molecules / 1mol = 1116 ×10²³ molecules of CaO.

Answer: The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

Explanation:

The molecule being described has 4 electron domains, 1 of which is a bonded atom and 3 are lone pairs. The ideal bond angle is 109.5 degrees. The hybridization is sp3. The molecule is polar.

The molecule you are describing has four electron domains consisting of one bonded atom and three lone pairs.

The ideal bond angle for a molecule with four electron domains is 109.5 degrees, which is known as the tetrahedral angle.

The hybridization of the central atom in this molecule is sp3.

To determine whether the molecule is polar or nonpolar, we need to examine the molecular geometry and the electronegativity of the atoms involved.

In this case, the molecule is tetrahedral, meaning that the shape is symmetric. If all the atoms attached to the central atom are the same, the molecule is nonpolar. However, if there are different atoms or if there are polar bonds in the molecule, the molecule may be polar.

Click the below link, to learn more about Hybridisation of molecule:

https://brainly.com/question/19922822

#SPJ11

Appropriate benefit of dietary fiber intake to its associated disease.- c. Decreases intestinal transit time and exposure to potential toxins

Cardiovascular diseases (CVDs) are the most common cause of death worldwide, claiming the lives of an estimated 17.9 million persons each year. CVDs are a group of heart and blood disorders that include coronary artery disease, vascular disease, rheumatic fever, and others. Coronary heart disease could be cured, but treatment can help manage the symptoms and lower the risk of conditions such as heart attacks. Treatment may include changes in lifestyle, such as physical activity and quitting smoking. The most common symptom of heart disease is heart disease (CHD), which kills approximately 382,820 people every year. Every year, approximately 805,000 Americans suffer a heart attack.

To learn more about disease here:

https://brainly.com/question/8611708

#SPJ4

Answer:

but were is the answer

Explanation:

i am so confuesed

When pieces of two ionic compounds switch places to create two new compounds, it is called a double replacement reaction also known as a double displacement, exchange, or metathesis reaction

One in which one reactant is only partially replaced by another is referred to as a twofold displacement reaction.

A list of double reactions is provided below:

AB = CD + CB + CD + AD

A twofold replacement process involves exchanging the same ions from two reactant ionic bonds for two new product compounds.

Two reactants transfer cations or anions to create two new products in a double replacement reaction.

Metathesis reactions double and displacement reactions are additional names for dual replace procedures.

Double replacement reactions include, but are not limited to, precipitation, gas production, and neutralization.

To learn more about double replacement reaction visit:

https://brainly.com/question/19267538

#SPJ4

Answer:

Why does the Moon have phases?

At the new Moon phase, the Moon is so close to the Sun in the sky that none of the side facing Earth is illuminated (position 1 in illustration). In other words, the Moon is between Earth and Sun. At first quarter, the half-lit Moon is highest in the sky at sunset, then sets about six hours later (3). At full Moon, the Moon is behind Earth in space with respect to the Sun. As the Sun sets, the Moon rises with the side that faces Earth fully exposed to sunlight (5).

At the new Moon phase, the Moon is so close to the Sun in the sky that none of the side facing Earth is illuminated (position 1 in illustration). In other words, the Moon is between Earth and Sun. At first quarter, the half-lit Moon is highest in the sky at sunset, then sets about six hours later (3). At full Moon, the Moon is behind Earth in space with respect to the Sun. As the Sun sets, the Moon rises with the side that faces Earth fully exposed to sunlight (5).

The Moon has phases because it orbits Earth, which causes the portion we see illuminated to change. The Moon takes 27.3 days to orbit Earth, but the lunar phase cycle (from new Moon to new Moon) is 29.5 days. The Moon spends the extra 2.2 days "catching up" because Earth travels about 45 million miles around the Sun during the time the Moon completes one orbit around Earth.

At the new Moon phase, the Moon is so close to the Sun in the sky that none of the side facing Earth is illuminated (position 1 in illustration). In other words, the Moon is between Earth and Sun. At first quarter, the half-lit Moon is highest in the sky at sunset, then sets about six hours later (3). At full Moon, the Moon is behind Earth in space with respect to the Sun. As the Sun sets, the Moon rises with the side that faces Earth fully exposed to sunlight (5).

You can create a mockup of the relationship between Sun, Earth, and Moon using a bright lamp, a basketball, and a baseball. Mark a spot on the basketball, which represents you as an observer on Earth, then play with various alignments of Earth and Moon in the light of your imaginary Sun.

When is the Harvest Moon?

The full Moon that occurs closest to the autumnal equinox is commonly referred to as the "Harvest Moon," since its bright presence in the night sky allows farmers to work longer into the fall night, reaping the rewards of their spring and summer labors. Because the equinox always falls in late September, it is generally a full Moon in September which is given this name, although in some years the full Moon of early October earns the "harvest" designation.

Why do we always see the same side of the Moon from Earth?

The Moon always shows us the same face because Earth's gravity has slowed down the Moon's rotational speed. The Moon takes as much time to rotate once on its axis as it takes to complete one orbit of Earth. (Both are about 27.3 Earth days.) In other words, the Moon rotates enough each day to compensate for the angle it sweeps out in its orbit around Earth.

Gravitational forces between Earth and the Moon drain the pair of their rotational energy. We see the effect of the Moon in the ocean tides. Likewise, Earth's gravity creates a detectable bulge -- a 60-foot land tide -- on the Moon. Eons from now, the same sides of Earth and Moon may forever face each other, as if dancing hand in hand, though the Sun may balloon into a red giant, destroying Earth and the Moon, before this happens.

When does the young Moon first become visible in the evening sky?

There is no real formula for determining the visibility of the young Moon. It depends on several factors: the angle of the ecliptic (the Moon's path across the sky) with respect to the horizon, the clarity of the sky (how much dust and pollution gunks it up), and even the keenness of the observer's eyesight.

The young Moon becomes visible to the unaided eye much earlier at times when the ecliptic is perpendicular to the horizon, and the Moon pops straight up into the sky. In these cases, it may be possible to see the Moon as little as 24 hours after it was new, although every hour beyond that greatly increases the chances of spotting it. When the ecliptic is at a low angle to the horizon, and the Moon moves almost parallel to the horizon as it rises, the Moon probably doesn't become visible until at least 36 hours past new.

The record for the earliest claimed sighting of the young crescent Moon is around 19 hours, although most experts are suspicious of any claims of times less than about 24 hours.

Explanation:

a. The  compounds are enantiomers.

b. The compounds are diastereomers.

c. The compounds are enantiomers.

The mirror images of the enantiomers are the non-superimposable. The Diastereomers are the compounds that possess the images that are the superimposable. The Enantiomers are the optically active when it will compared to the diastereomers that are not the optically active.

The compounds that have the similar connectivity of the atoms but it will  possess the opposite configurations at stereogenic center. They are enantiomers.  The compound that has the similar configuration of stereogenic center and the opposite configuration in the another stereogenic center. The compounds are the diastereomers.

To learn more about enantiomers here

https://brainly.com/question/31119372

#SPJ4

When positive hydrogen ions (H⁺) react with water (H₂O) in solution, they produce hydronium ions (H₃O⁺).

The process of positive hydrogen ions (H⁺) reacting with water (H₂O) in solution is an acid-base reaction, as the hydrogen ions are acidic and the water acts as a base. The process of producing hydronium ions (H₃O⁺) are

1. Positive hydrogen ions (H⁺) are introduced into the solution.

2. These hydrogen ions react with water molecules (H₂O) in the solution. 3. One hydrogen ion (⁺) combines with one water molecule (H₂O) to form a hydronium ion (H₃O⁺).

4. The overall chemical equation for this reaction is H⁺ + H₂O → H₃O⁺.

So, the reaction between positive hydrogen ions and water in solution produces hydronium ions (H₃O⁺).

Learn more about hydronium ions: https://brainly.com/question/13387755

#SPJ11

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{20}{25} = \frac{4}{5} \\ \)

We have the final answer as

Hope this helps you

Answer:

1.  Recognizing a problem.

2. Drawing inferences.

3. Testing a hypothesis.

Explanation:

First you need to find a problem, make an inference or a guess, and then you can test your hypothesis.

I hope it helps! Have a great day!

1.  the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.  the final concentration of KOH after adding 550 mL of water to 125 mL of 3.01 M KOH solution is approximately 0.557 M.

1.) If 125 mL of water is added to 45.3 mL of a 0.71 M NaOH solution, the resulting solution will be a diluted NaOH solution. The addition of water will increase the total volume while reducing the concentration of NaOH. To determine the final concentration of NaOH, we need to consider the conservation of moles.

First, let's calculate the moles of NaOH in the initial solution:

moles of NaOH = volume (in L) × concentration (in M)

moles of NaOH = 0.0453 L × 0.71 M = 0.0321433 moles

After adding 125 mL (0.125 L) of water, the total volume of the solution becomes 0.0453 L + 0.125 L = 0.1703 L.

To find the final concentration, we divide the moles of NaOH by the total volume:

final concentration of NaOH = moles of NaOH / total volume

final concentration of NaOH = 0.0321433 moles / 0.1703 L ≈ 0.189 M

Therefore, the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.) If 550 mL of water is added to 125 mL of a 3.01 M KOH solution, the resulting solution will also be a diluted solution. Again, we will apply the conservation of moles to determine the final concentration of KOH.

First, calculate the moles of KOH in the initial solution:

moles of KOH = volume (in L) × concentration (in M)

moles of KOH = 0.125 L × 3.01 M = 0.37625 moles

After adding 550 mL (0.55 L) of water, the total volume of the solution becomes 0.125 L + 0.55 L = 0.675 L.

To find the final concentration, divide the moles of KOH by the total volume:

final concentration of KOH = moles of KOH / total volume

final concentration of KOH = 0.37625 moles / 0.675 L ≈ 0.557 M

For more such questions on concentration visit:

https://brainly.com/question/28564792

#SPJ8

Answer:

hemoglobin to become bicarbonate

Explanation:

When carbon dioxide enters the blood it combines with hemoglobin to form carbamino hemoglobin or carboxyhemoglobin but most of it becomes carbonate ions and diffuse into the blood plasma.

Hemoglobin is a blood protein giving red colour to the blood. It helps to transport oxygen everywhere. When oxygen fills in the air sack, it combines with oxygen and form oxyhemoglobin.

However, hemoglobin have more affinity towards carbon dioxide and and they combines to form carbaminohemoglobin which prevents the transportation of oxygen through blood.

The carbon dioxide will be converted into carbonic acid by combining with water. This acid then forms its carbonate ions and these ions helps to maintain the blood pH to be constant.The carbonate ions, CO₃²⁻can easily diffuse into blood plasma.

To find more about carboxyhemoglobin, refer the link:

https://brainly.com/question/13056928

#SPJ5

Answer:

A. It causes rocks to change color

Explanation:

Weathering can be defined as the gradual decomposition of rock. This means, rocks are broken into pieces or sediments through the process of weathering.

There are two types of weathering process:

1. Physical weathering also known as mechanical weathering. This is the breakdown of rocks into smaller pieces without changing the composition of the rock. Physical weathering is caused by the action of ice, wind, plant growth.

2. Chemical weathering: Here, the rocks changes not just in size of pieces but in its composition. This is when other minerals are applied on the rock in other to dissolve it.

Answer: i rlly dont know srry

Explanation:

To calculate the value of AG' at 298 K, we need to use the equation: AG' = AH' - TAS'.                                                                            

First, we need to convert the values given to kJ/molcan. AH298 = -92.2 kJ/molrani x (1 mol/2 molcan) = -46.1 kJ/molcan.
AS298 = -198.8 J/(molznK) x (1 kJ/1000 J) x (1 mol/2 molcan) = -0.0994 kJ/(molcanK). Therefore, AG' = -46.1 kJ/molcan - (298 K x (-0.0994 kJ/(molcanK))) = -46.1 kJ/molcan + 29.64 kJ/molcan = -16.46 kJ/molcan. Thus, the value of AG' at 298 K is -16.46 kJ/molcan.
The reaction of N2(g) and H2(g) to form NH3(g) can be analyzed using the Gibbs free energy equation, which is ΔG = ΔH - TΔS. To maximize the yield of NH3(g), we need to calculate ΔG' at 298 K.
Therefore, the value of ΔG' at 298 K is -32.9 kJ/mol.

Learn more about NH3 here:
https://brainly.com/question/30214340

#SPJ11

The type of chromatography described, where a specimen is spotted on a silica-coated glass plate and the retention factor for migrated substances is calculated, is called Thin-Layer Chromatography (TLC).

TLC is a chromatographic technique used to separate and analyze mixtures of compounds. In TLC, a thin layer of adsorbent material, such as silica gel or alumina, is coated onto a glass or plastic plate. The specimen is applied as a spot near the bottom of the plate, and the plate is then placed in a solvent system. As the solvent moves up the plate through capillary action, the different components of the mixture will migrate at different rates, resulting in separation. The retention factor (Rf) is a ratio that represents the distance traveled by the compound divided by the distance traveled by the solvent front and is used to identify and characterize the components in the mixture.

To learn more about Thin layer chromatography, click here

brainly.com/question/10296715

#SPJ11

Answer:

In ionic compounds, electrons are transferred between atoms of different elements to form ions. But this is not the only way that compounds can be formed. Atoms can also make chemical bonds by sharing electrons equally between each other. Such bonds are called covalent bonds.

Please mark as brainliest please

Answer:

Elements

Explanation:

I just did this

Answer:

a. pH → 8.12

b. pH → 10.55

c. pH → 8.38

Explanation:

In this excersise, the first two salts come from a strong base and a weak acid, so the anion will make hydrolisis that can help us, to determine pH.

The  NH₄ClO₄ comes from a weak acid and a weak base. This is an special case.

a. KNO₂ →  K⁻  +  NO₂⁻

NO₂⁻  +  H₂O  ⇄  HNO₃  +  OH⁻        Kb = 1.41×10⁻¹¹

Kb = x² / (0.12 - x)

We can avoid the x in denominator because Kb it is a very low value. This expression is reduced to:

[OH⁻] = √(Kb . 0.12)

[OH⁻] = √(1.41×10⁻¹¹ . 0.12)  = 1.30×10⁻⁶ M

- log [OH⁻] = pOH → - log 1.30×10⁻⁶  = 5.88

14 - pOH = pH → 14 - 5.88 = 8.12

b. NaOCl  →  Na⁻  +  OCl⁻

OCl⁻  +  H₂O  ⇄  HClO  +  OH⁻        Kb = 3.33×10⁻⁷

The same as before, we avoid the x in denominator because Kb it is a very low value.

[OH⁻] = √(Kb . 0.37)

[OH⁻] = √(3.33×10⁻⁷ . 0.37)

[OH⁻] = 3.51×10⁻⁴ M

- log 3.51×10⁻⁴ = 3.45 → pOH

14 - 3.45 = 10.55 → pH

c. NH₄ClO₄ → NH₄⁺  +  ClO⁴⁻

Both ions can make hydrolisis in water. Ammonium can give ammonia and the hypochlorite makes hypochlorous acid.

NH₄⁺  +  H₂O  ⇄  NH₃  +  H₃O⁺      Ka = 5.7×10⁻¹⁰

OCl⁻  +  H₂O  ⇄  HClO  +  OH⁻        Kb = 3.33×10⁻⁷

The reduced expression to calculate pH for this sort of salts, is to make the square root of the product between the Ka constant.

As we have Kb for the HClO, we need to determine the Ka

Kw = Ka . Kb   →  Kw/Kb = Ka → 1×10⁻¹⁴ / 3.33×10⁻⁷ = 3×10⁻⁸

[H₃O⁺] = √(5.7×10⁻¹⁰ . 3×10⁻⁸) = 4.14×10⁻⁹ M

- log [H₃O⁺] = pH → - log 4.14×10⁻⁹ = 8.38

As per the calculations of the pH the solutions of 0.12 M KNO2 and 0.37 M NaOCl and the 0.39 M NH4ClO4 web assign have been made with a significant check on the figures.

Learn more about the Calculate the pH of each of the following solutions.

brainly.com/question/9465562.

Transverse.

Longitudinal travels in the same direction as medium.