HURRY
Which part of an atom is mostly empty space?
nucleus
proton cloud
electron cloud
neutron

Answer:

What changes do you notice? The white you see have undergone coral bleaching. At high temperatures, corals may lose their zooxanthellae, causing corals to lose their color and their main source of food. Once bleaching occurs, the coral colony usually dies.

Explanation:

study well

Arigato

Answer:

\(2.26 \times 10^{23}atomsF\)

Explanation:

Step 1: Given data

Step 2: Convert "V" to liters

We will use the conversion factor 1 L = 1000 mL.

750.0 mL × 1 L/1000 mL = 0.7500 L

Step 3: Calculate the moles of HF

We will use the following expression.

n = M × V

n = 0.500 mol/L × 0.7500 L = 0.375 mol

Step 4: Calculate the atoms of F in 0.375 moles of HF

We will use the following relationships:

\(0.375 mol HF \times \frac{1 mol F}{1 molHF} \times \frac{6.02 \times 10^{23}atomsF }{1 mol F} = 2.26 \times 10^{23}atomsF\)

Answer:

300kg

Explanation: The question says about 30%, so I think it is 300kg

Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Thus 1000g of Sphalerite contains 300g of zinc

Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

30% of zinc in Sphalerite means:

30g of zinc is present in 100g of Sphalerite

so in 1g of Sphalerite =(30÷100)g of zinc

so in 1000g of Sphalerite = (30÷100)×1000g of zinc

                                            = 300g of zinc

Thus 1000g of Sphalerite contains 300g of zinc

To learn more about mass percentage, here:

https://brainly.com/question/27429978

#SPJ2

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

for more question on NaCl

https://brainly.com/question/23269908

#SPJ8

Answer:

4. the egg shell you place in normal water

Answer:

Average kinetic energy of gases, which is derived from the RMS (root mean square speed) and KE equation, can be solved as:

It appears that the average KE of gases is dependent on the temperature which means that all gases will have the same KE as long the temperature is the same

Explanation:

The scientific method involves making observations and asking questions. Scientists form hypotheses based on these observations and then develop controlled experiments to collecting and analyze data. Using this data, they are able to draw conclusions and form questions for new scientific research.

:)ᴍᴀʀᴋ ᴀꜱ ʙʀᴀɪɴʟɪꜱᴛ

[OH⁻] = 0.158 x 10 ⁻⁷ M is the concentration of OH- of a solution with an H3O⁺ concentration equal to 6.31  x 10 ⁻⁷ M.

The letters pH stand for the power of the hydrogen ion. The pH of a solution is the negative logarithm of the hydrogen-ion concentration.

pH = - [log H⁺]

\(\rm [H^{+}] [OH^{-}] = 1 \times 10^{-14}\)

\(\rm[OH^{-}] = \dfrac{1 \times 10^{-14} }{ [H^{+}] }\)

\(\rm[OH^{-}] = \dfrac{1 \times 10^{-14} }{ 6.31 \times 10^{-7} }\)

[OH⁻] = 0.158 x 10 ⁻⁷ M

Therefore [OH⁻] = 0.158 x 10 ⁻⁷ M is the concentration of OH- of a solution with an H3O+ concentration equal to 6.31  x 10 ⁻⁷ M.

To know more about pH scale

https://brainly.com/question/491373

#SPJ1

Answer:

Explanation:

A molecule is a basic unit of a chemical substance made up of two or more atoms that are bonded together. A compound, on the other hand, is a substance made up of two or more different elements that are chemically bonded together.

Every compound is a molecule because it is made up of at least two chemically bonded atoms, but not every molecule is a compound because a molecule can be made up of the same type of atoms and not be a compound.

For example, molecular oxygen (O2) is made up of two oxygen atoms, but it is not a compound because both atoms are the same element. On the other hand, water (H2O) is a compound made up of hydrogen and oxygen atoms.

A Brainly star would be appreciated if it helped you!

To determine the tomato's velocity when it hits the ground, we need more information. Specifically, we need the height from which the tomato was dropped and the tomato mass.

Without these details, it is impossible to calculate velocity accurately. The velocity of an object when it hits the ground depends on factors such as the height of the fall, the mass of the object, and any forces acting on it during the fall (such as air resistance).

If you can provide the necessary information, I can help you calculate the velocity of the tomato when it hits the ground.

Answer:

0.333 atm

Explanation:

Step 1: Given data

Step 2: Convert 30.0 °C to Kelvin

We will use the following expression.

K = °C + 273.15 = 30.0 + 273.15 = 303.2 K

Step 3: Calculate the final pressure of the gas

If we assume ideal behavior and constant volume, we can calculate the final pressure od the gas using Gay-Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

P₂ = 0.370 atm × 273.15 K/303.2 K = 0.333 atm

Answer:

d

Explanation:

neutrons and protons have the mass nearly 1.67*10-24 g

but neutrons have no charge.. protons are positively charged

The equation is balanced since the number of atoms of the elements on each side of the reaction is equal. So we can continue with the calculations.

We have that the Al to O2 ratio is 4/3, we know this from the stoichiometry of the reaction by seeing the coefficients that accompany the Al and O2 molecules.

So the moles of Al will be:

If you have 99 moles of O2 you need 132 moles of Al to use it all.

Answer: 132mol Al

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

To learn more about active transport,

brainly.com/question/12133248

the answer is c

Explanation:

because c has all elements mixed together

Answer:

It is important for you find a job that matches your skills, interests and abilities when searching for a career because then you will be satisfied with what you do and your career because since it fits your wants, skills, interests and abilities you will do a great job while working and completing tasks. Overall you'll be happy because that's the perfect job for you.

Explanation:

Answer:

See explanation.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to realize that the NaCl solution must react with an aluminum-containing substance, say the hydroxide or any other salt, so that the following equation will take place:

\(3NaCl(aq)+Al^{3+}\rightarrow 3Na^+(aq)+AlCl_3(s)\)

In such a way, given the volume of the NaCl solution, it must be necessary to know its concentration, in order to get moles of this salt, further use the 3:1 mole ratio of NaCl to AlCl3 and the molar mass of the latter (133.34 g/mol) in order to solve an stoichiometric setup like the following:

\(m_{AlCl_3}=V_{NaCl}*M_{NaCl}*\frac{1molAlCl_3}{3molNaCl} *\frac{133.34gAlCl_3}{1molAlCl_3}\)

Besides, you must make sure the volume is in liters.

Best regards!

The difference about the presence of water on Earth that sets it apart from the other inner planets is that either the planet is too hot that the water vaporizes or too cold that the water freezes.

The primary components of inner planets, commonly referred to as terrestrial planets, are rocks and metals. In comparison to the outer planets, they are modest in both size and shape. They have a molten metal core and a solid surface. The Solar System's four innermost planets are as follows (Mercury, Venus, Earth, and Mars).

Most importantly, since the temperature permits liquid water to exist for long periods of time, Earth is unique in that the majority of our planet is covered with liquid water.

Only the Earth possesses liquid water because all the other planets and moons are either too hot or too cold, causing any water that may be present to boil away or freeze.

To learn more about inner planets refer- https://brainly.com/question/11023671

#SPJ9

Answer:

the answer is out of a or c

Explanation: hope this helps

An amino group is a functional group consisting of an amino (-NH2) and a carboxyl (-COOH) group, which is found in proteins.

It is essential for the formation of peptide bonds between amino acids, which are the building blocks of proteins. The amino group is partially positively charged and is therefore able to interact with other molecules through hydrogen bonding and electrostatic interactions.

The amino group is also able to donate a hydrogen atom, making it an important component in many biochemical reactions.

Furthermore, it plays an important role in the folding of proteins, as the electrostatic interactions between the amino and carboxyl groups help stabilize the protein's three-dimensional structure. In addition, the presence of the amino group can influence the solubility of proteins in different solutions.

To know more about proteins, click below:

https://brainly.com/question/10058019

#SPJ4

Answer:

On first glance, elements and compounds might appear different, yet they share many similarities, like being made up of atoms and having bonds linking their atoms together. Elements and compounds also share the qualities of being both pure and homogeneous substances.

Elements are substances that are made from one type of atom. An element cannot be broken down into any other substance. ... Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.

Elements and compounds are chemicals substances while elements are pure but compounds are not.

A chemical compound is made up of two or more elements that are chemically combined together

Elements are substances that are made from one type of atom. An element cannot be broken down into any other substance.

Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.

Learn more about chemical compounds here:

https://brainly.com/question/26556885

#SPJ6

Explanation:

First you write the balanced chemical equation

Then you put X on the above of water and put 35 L on the above of O2.

35 L X

2. 2 C2H6 + 7O2 > 4CO2 + 6H2O

After that you multiply the coefficient of O2 by STD( 22.4 L ) and also H2O. And write the number on below O2 and H2O.

35 L X

3. 2 C2H6 + 7O2 > 4CO2 + 6H2O

156.7 L 134.4 L

4. Then make a proportion

\(\frac{35 \: l}{156.8 \: l} = \frac{x}{134.4 \: l} \)

X = 30 L

next change the volume to mole

5. 1 mol = 22.4 L

X = 30 L

X ~ 1.34

Finally change the mole to mass by the formula of:

mass of water = mole of water × molar mass of water

m = m × M

m = 1.34 mol × 18 g\mol

m = 24.12 g

Approximately 766.08 grams of oxygen are required to completely react with 240g of C₂H₆.

To determine the amount of oxygen required to completely react with 240g of C₂H₆ (ethane), we need to set up a balanced chemical equation for the combustion of ethane.

The balanced equation for the combustion of ethane is as follows:

C₂H₆ + O₂ → CO₂ + H₂O

From the balanced equation, we can see that the stoichiometric ratio between C₂H₆ and O₂ is 1:3. This means that for every one mole of C₂H₆, three moles of O₂ are required for complete combustion.

To calculate the amount of oxygen required, we need to convert the given mass of C₂H₆ to moles using its molar mass, and then use the stoichiometric ratio to determine the moles of O₂ required. Finally, we can convert the moles of O₂ back to grams using the molar mass of oxygen.

The molar mass of C₂H₆ is calculated as follows:

(2 x atomic mass of carbon) + (6 x atomic mass of hydrogen)

(2 x 12.01 g/mol) + (6 x 1.01 g/mol) = 30.07 g/mol

Now, we can proceed with the calculation:

Calculate the moles of C₂H₆:

moles of C₂H₆ = mass of C₂H₆ / molar mass of C₂H₆

moles of C₂H₆ = 240 g / 30.07 g/mol ≈ 7.98 mol

Determine the moles of O₂ using the stoichiometric ratio:

moles of O₂ = moles of C₂H₆ x (3 moles of O₂ / 1 mole of C₂H₆)

moles of O₂ = 7.98 mol x 3 ≈ 23.94 mol

Convert moles of O₂ to grams:

mass of O₂ = moles of O₂ x molar mass of O₂

mass of O₂ = 23.94 mol x 32.00 g/mol = 766.08 g

For more such questions on oxygen visit:

https://brainly.com/question/28009615

#SPJ8

Answer:

a drink my guy

Explanation:

just frozen

Answer:

The end products cannot be changed back in their original forms

Explanation:

Answer:

the first one

Explanation:

Answer:

acceleration

Explanation:

Answer:

From solutions that evaporate

From hot water solutions when the solution cools

Explanation:

The substances that can form minerals can be dissolved in the water to form a solution. Solution can be described as as a mixture in which a solute is dissolved in a solvent. When a particular dissolved solute evaporates from the solution, crystals of minerals might form. The mineral halite was formed when seas evaporated over a period of time.

The minerals can also be formed when a hot water solution gets cooled.

Answer:

The answer is "\(20 \ mL\)"

Explanation:

Given:

Molarity= number of moles

because it is 1 Liter

\(\to \frac{0.03\ moles}{1.5 moles}=0.02\ L= 20 \ mL \ of\ Tris\\\\\)

therefore,

it takes 20 mL of Tris.

\(\to \frac{0.150 \ moles}{5\ moles} =0.03\ L\\\\\)

                     \(= 30 \ mL \ of\ Nacl\)

So, take \(20 \ mL\ of\ NaCl.\)

Answer:

2.24725 kilograms

Explanation:

To convert grams to kilograms, you divide the number of grams you have by 1000. So, 800 g = 2.225 x 1010/1000 = 2.24725 kg