Part C
How did Dr. Tierno find the answer to his question?

All living organisms falls to either of the prokaryote or eukaryote categories. Thus, the correct option is true.

Living organisms are classified into 2 based on the type of cells they are made of. These are:

Hence, it is safe to say that prokaryotes and eukaryotes both fall in the category of living things. You have to be living in order to be classified as either.

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Answer:

Molar mass = 27 g/mol

Explanation:

Given data;

Number of moles of Al = 0.2 mol

Mass of Al = 5.4 g

Molar mass of Al = ?

Solution:

Formula:

Number of moles = mass/molar mass

By putting values,

0.2 mol = 5.4 g/ molar mass

Molar mass = 5.4 g/ 0.2 mol

Molar mass = 27 g/mol

Answer:

6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.

Explanation:

The balanced reaction is:

C₂H₄ + 3 O₂ ⇒ 2 CO₂ + 2 H₂O

Being the molar mass of the elements:

Then the molar mass of compound C₂H₄ is:

C₂H₄= 2*12 g/mole + 4*1 g/mole= 28 g/mole

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), 1 mole of C₂H₄ acts. Then, being the mass of a mole of a substance, which can be an element or a compound, 1 mole of C₂H₄ is 28 g, which is the amount of mass that reacts in this case.

Then be able to apply the following rule of three: if by stoichiometry 28 grams of C₂H₄ react with 3 moles of O₂, 8.7 grams of C₂H₄ with how many moles of O₂ do they react?

[tex]moles of O_{2} =\frac{8.7 grams ofC_{2} H_{4}*3 moles of O_{2} }{28grams ofC_{2} H_{4}}[/tex]

moles of O₂= 0.31  

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Then we can apply the following rule of three: if by definition of STP 1 mole occupies 22.4 L, 0.31 moles how much volume will it occupy?

[tex]volume=\frac{0.31 moles*22.4 L}{1 mole}[/tex]

volume= 6.944 L

6.944 liters of O₂ at STP will react with 8.7 grams of C₂H₄ to form CO₂ and H₂O.

The volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L

First, we will determine the number of moles of O₂ required.

From the given balanced chemical equation,

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

This means

1 mole of C₂H₄ is required to react completely with 3 moles of O₂

Now, we will determine the number of moles of C₂H₄ present

Mass of C₂H₄ = 8.7 g

Using the formula

[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]

Molar mass of C₂H₄ = 28.05 g/mol

∴ Number of moles of C₂H₄ = [tex]\frac{8.7}{28.05}[/tex]

Number of moles of C₂H₄ = 0.31016 mole

Since

1 mole of C₂H₄ is required to react completely with 3 moles of O₂

Then,

0.31016 mole of C₂H₄ will react completely with 3 × 0.31016 mole of O₂

3 × 0.31016 = 0.9305 mole

∴ Number of moles of O₂ required is 0.9305 mole

Now, for the volume of O₂ at STP that will react

Since 1 mole of a gas occupies 22.4 L at STP

Then,

0.9305 mole of O₂ will occupy 0.9305 × 22.4 L at STP

0.9305 × 22.4 = 20.8432 L

≅ 20.8 L

Hence, the volume of O₂ at STP that will react with the given C₂H₄ is 20.8 L

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Answer:

75 grams

Explanation:

At 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water.

The solubility of a substance in a particular solvent is the maximum amount of that substance that can dissolve in the solvent at a given temperature. The solubility of a substance can be affected by factors such as temperature, pressure, and the presence of other substances.

For K2Cr2O7, the solubility in water is highly dependent on temperature. At 95 °C, the solubility of K2Cr2O7 in water is approximately 75 g/100 mL. This means that at 95 °C, you can dissolve up to 75 grams of K2Cr2O7 in 100 mL of water. Since 100 g of water is equivalent to 100 mL, you can dissolve up to 75 grams of K2Cr2O7 in 100 g of water at 95 °C.

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Answer:

I'm pretty sure its liver and pancreas

Explanation:

the pancreas delivers the digestive juice to the small intestine through small tubes, your liver makes the digestive juices called the bile that helps digest fats and some vitamins

Answer:

the answer is liver and pancreas

Answer:

Cu Copper 63.546

Cl Chlorine 35.453

F Fluorine 18.998403

Explanation:

I don't know whether you asked for Cu or Cl so answered it both.

Answer shallow ocean

Explanation:

i think

Answer:

sample 2

Explanation:

hope this helps

Answer:

It is a Physical change, have a great day :)

Explanation:

A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

Answer:

Apollo 11 made a capsule landing

Explanation:

Answer: i don’t know what type of landing you mean

Explanation:

They did a lunar landing then reentry and then capsule landing.

Answer:

Explanation:

I can help

Answer:

12.67g of Mg / 15.33g of MgO * 100% = 82.6% of Mg

Explanation:

Answer:

fgedhwkmgfvhcdnxj

Explanation:

gtryijdohuygfvbhgfy

Answer:

NaCl and Br2

Explanation:

Edge 2020

Answer:

The Answer is C: Na and Br3

Explanation:

Answer:

it runs the risk of triggering earthquakes. releases harmful gases

Answer:

21.25

Explanation:

Answer:

Heat packs that contain iron and water packets: Exposing the solution to air results in the oxidation of the iron (creates rust). The oxidation of the iron is an exothermic process. Heat packs that contain supersaturated sodium acetate: These are reusable, the packs are boiled to dissolve sodium acetate.

Explanation:Thanks for asking question

Answer:

The answers to your question are given below

Explanation:

The equation for the reaction is given below:

2KClO₃ —> 2KCl + 3O₂

The total number of each atoms present in the reactants and products can be obtained by doing a head count as illustrated below:

Reactants >>>>>> Number of atoms

Potassium (K) >>> 2 × 1 = 2

Chlorine (Cl) >>>> 2 × 1 = 2

Oxygen (O) >>>>> 2 × 3 = 6

Products >>>>>>> Number of atoms

Potassium (K) >>> 2 × 1 = 2

Chlorine (Cl) >>>> 2 × 1 = 2

Oxygen (O) >>>>> 3 × 2 = 6

Answer:

A) Abosrbed

Explanation:

The change is endothermic, meaning the material absorbs energy when it changes its phase from a solid to a liqiud.

Answer:

The electron spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for

interaction

Explanation:

I got the question right

During hydrogen bonding, The electron of hydrogen spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction. Option C is correct.

The presence of hydrogen atoms bound to strongly electronegative elements like nitrogen, oxygen, or fluorine as well as the polarity of the molecule determine whether hydrogen bonds are present in the molecule.

The electron density in the bond between a hydrogen atom and one of these electronegative atoms shifts in favor of the electronegative atom, giving rise to a partial positive charge on the hydrogen atom and a partial negative charge on the electronegative atom. Therefore, the hydrogen atoms in one molecule can establish hydrogen bonds with the electronegative atoms in other molecules.

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The question should be

What happens to hydrogen during hydrogen bonding?

a)The proton spends a lot of time away from hydrogen and hydrogen's electron is exposed for interaction

b)The electron spends a lot of time away from hydrogen and hydrogen's electron is exposed for interaction

c)The electron spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction

d) The proton spends a lot of time away from hydrogen and hydrogen's nucleus is exposed for interaction

1. 4

2. 4

3. 2

4. 2

Given

Reaction

2H₂+O₂⇒2H₂O

Required

Number of atoms

Solution

In compounds, the number of atoms of the constituent components in the form of elements is usually indicated by a subscript after the element symbol, while the number in front of the compound which is the coefficient indicates the number of molecules of the compound.

In chemical reactions, the reactants are on the left and the products on the right

1. Number of Hydrogen in reactants

2 molecules x 2 atoms = 4 atoms

2. Number of Hydrogen in products

2 molecules x 2 atoms = 4 atoms

3. Number of Oxygen in reactants

1 molecules x 2 atoms = 2 atoms

3. Number of Oxygen in products

2 molecules x 1 atoms = 2 atoms

The reaction is said to be balanced because the number of atoms of the element is the same between the reactants and products

Answer:

pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral.

Answer:

cause of climate change: The earth's climate is affected and changed through a lot of natural causes like volcanic eruptions.

how it causes change:  Volcanoes can be extremely dangerous to earth because it can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere.

what is the effect of the change: Major eruptions alter the Earth's radiative balance because volcanic aerosol clouds absorb terrestrial radiation, and scatter a significant amount of the incoming solar radiation, an effect known as "radiative forcing" that can last from two to three years following a volcanic eruption.

i hope you get it correct!! <3 can i plz get a brainlest!

Answer:

See explanation

Explanation:

The reaction between alcohol and acidified potassium dichromate  is a redox reaction. This reaction can be used to detect a drunken driver.

Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.

The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.

Answer:

C

Explanation:

Answer:

I think A, not sure

Explanation:

her weight depends on the force of gravity

Answer:

I just looked up the types of matter energy has.

Explanation:

I believe the answer is D.

Sally's list of matter that have energy is not complete as all the types of matter have energy as all matter have mass , and mass and energy are related, so she should have added gases and solids to her list.

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of the  same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.

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Answer:

velocity and momentum

Explanation:

as you exert force, the object accelerates, hence, its velocity increases.

since momentum is mass times velocity, the momentum increases too

Please be reminded, this answer may not be 100% correct

When the force should be applied for a long time so it increases the change in velocity and momentum

The momentum of the object should be equivalent to the object mass times with the object velocity

Here

p = mv

Here p means momentum

m means mass

v means velocity

Here the momentum should be directly proportional to the mass of the object and for the velocity of the object also.

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Answer:

(1) 25.0cal/g (2) 540cal/g (3) 327 cal/g (4) 8,180 cal/g 82 If 11 grams of a gas occupies 5.6 liters at STP, what is its gram molecular mass? (1) 11 g/mol (2) 22 g/mol

Answer:

0.1mole

Explanation:

Given parameters:

Pressure = 0.0884atm

Temperature  = 6°C  = 6 + 273  = 279K

Volume occupied  = 26.5L

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we are going to use the ideal gas equation:

           PV  = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmLmol⁻¹k⁻¹

T is the temperature.

  Insert the parameters and solve for n;

     0.084 x 26.5  = n x 0.082 x 279

              n  = 0.1mole

Answer:

a) high pressure

that is the answer i got, but wait for a few more answers before you write the answer