Vitamin A is a very large organic molecule composed of twenty atoms
of carbon, one atom of oxygen and thirty atoms of hydrogen. How
many atoms total are in TWO molecules of vitamin A.
Select one:
84
68
34
102

Answer: synthesis reaction.

Explanation:

The type of reaction represented by the equation is synthesis reaction.

A synthesis reaction is simply defined as reaction in which two or more substances react to produce a single new substance which has characteristics different from the reactants.

Considering the equation given, we can conclude as follow:

2H₂ + O₂ —> 2H₂0 + energy

The reaction is a synthesis reaction since H₂ and O₂ combined to produce a single product i.e H₂O

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Answer:

Released

Explanation:

When particles that attract each other come together, energy is usually released. The combination of the two particles is expected to result in a lower energy system. This lower energy system will be more stable than the different individual particles.

Hence, as this lower energy system is formed, the excess energy originally possessed by the particles is evolved hence energy is released when particles that attract each other are allowed to come together.

Answer:

8.45 moles are produced

Explanation:

CaCl₂ + Na₂CO₃ → CaCO₃ + 2 NaCl

From the equation, we can see that for every 1 mole of CaCl₂  and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl

to calculate how many moles of CaCO₃ ,we simply multiply multiply each by the 8.45 moles of CaCl₂ which will reacts

these is because for every 1 mole of CaCl₂  and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl

therefore we have every 1x8.45(8.45)  mole of CaCl₂  and 1x8.45(8.45) mole Na₂CO₃ will give 1x8.45(8.45) mole of CaCO₃ and 2x8.45(16.9) moles of NaCl

8.45 moles are produced in the reaction

Answer:

8.45 moles

Explanation:

The balanced equation for the reaction is given below:

CaCl2 + Na2CO3 → CaCO3 + 2NaCl

From the balanced equation above,

1 mole of calcium chloride (CaCl2) produced 1 mole of calcium carbonate (CaCO3).

Therefore, 8.45 moles of calcium chloride (CaCl2) will also produce 8.45 moles of calcium carbonate (CaCO3)

From the illustration above, 8.45 moles of calcium carbonate (CaCO3) are produced.

Answer:

Explanation:

You need the specif heat capacities of both cobalt and lead.

When the two sheets reach the thermal equilibrium their temperatures are equal.

You can use the equations for the thermal heat to find the equilibrium temperature:

Thermal heat released by the hot sheet, lead:

Thermal heat absorbed by the cold sheet, cobalt:

Equal the two equations to solve for T:

I remove the units for easier handling:

Round to 2 significant figures: 35ºC ← answer

Answer:

(a) What are the half-lives of these two isotopes? (b) Which one decays at a faster rate? (c) How much of a 1.00-mg sample of each isotope remains after 3 half- ...

Explanation:

Answer:

1) 3-methylpentane   2)Butyne

Explanation:

On the first molecule, we have a methyl group on the 3rd carbon, so you will have "3-methhyl". It's a 5 carbon molecule with no double bonds, so "-pentane" is required.

On the second molecule, we have a simple 4 carbon molecule with a triple bond which makes it an Alkyne. 4 carbons makes the prefix "but-" and a alkyne males the ending "-yne".

Answer:c. Hooke and Leeuwenhoek

Explanation: I ask and that answer was right I don't know the explanation

Answer:

C. hooke and leruwenhoek

Answer:

0.3M

Explanation:

Molarity of a solution is given by;

M=n/v

Where;

n= number of moles of solute = mass of solute / molar mass

v= volume of solution

n= mass of CaCl2 / molar mass of CaCl2

Mass of CaCl2 = 0.5

Molar mass of CaCl2 = 40 + (2×35.5)

= 111g/mol

n = 0.5/111 = 0.0045mol

volume, v= 15mL = 15/1000 L = 0.015L

Note that molarity is in mole per liter, hence we convert 15mL to L. 1mL=1/1000L

M =0.0045/0.015

M=0.3mol/L

Therefore, the molarity of the solution is 0.3M

Complete Question:

Which statements describe the inner planets? Select three options.

A.  Uranus is one of the inner planets.

B. Mercury is one of the inner planets.

C. The inner planets are also called terrestrial planets.

D. The inner planets are larger than the outer planets.

E. Gases escaped from them during the planets’ formation.

Correct Option:

The statements which describe the inner planets are as follows:

B. Mercury is one of the inner planets.

C. The inner planets are also called terrestrial planets.

D. Gases escaped from them during the planets’ formation.

Explanation:

We have the smallest planet in the inner solar system - Mercury, Venus, Earth and Mars, which are so identified for being near to the Sun. A terrestrial planet, a telluric planet, or a rocky planet is a world made up predominantly of rocks of silicate or metal. The outer planets in the solar system are the nearest inner planets to the Earth.

The planets inside are smaller than the outer planets. When the fusion began on the Sun a huge seismic eruption would have originated from the Sun's core and erupted externally. It produced a concussion wave that washed away the inner planets' thick gaseous atmospheres, just like a candle flame bursts out of its wick when you unexpectedly blow.

Answer:

D. acids

Explanation:

I hope this helped

Answer:

80.043 g/mol

Explanation:

Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH ₄NO ₃, simplified to N₂H₄O₃. It is a white crystalline solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.

Food acids are added to make flavors "sharper", and also act as preservatives and antioxidants.

Acids are added to foods in order to preserving food as well as a food additives.

Acids are added for preserving food products as well as preventing bacteria growth and maintain quality of a product. there are a number of fruits and vegetables that have different types of acid.

So we can conclude that acids are added to foods in order to preserving food as well as a food additives.

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Final answer:

The pH of a solution is calculated using the hydrogen ion concentration in mol/L (molarity) by taking the negative logarithm of that concentration.

Explanation:

The property used to calculate the pH of a solution is A. The hydrogen ion concentration in mol/L. To calculate pH, we first measure the concentration of hydrogen (H+) ions in moles per liter (molarity). Then, we take the negative logarithm of this concentration to find the pH value. For instance, a concentration of 0.01 M H+ ions results in a pH of 2 because the negative log of 0.01 is 2. The pH scale typically ranges from 0 to 14, with 7 being neutral. A pH less than 7 indicates an acidic solution, while a pH greater than 7 indicates a basic solution.

Answer:

single replacement reaction.

Answer: 1.11 atm

Explanation:

The unit of pressure include kilopascal (kPa), atmospheres (atm), mmHg etc

Now, given that:

Air pressure = 113 KPa

Convert kPa to atm

If 101.325 kPa = 1 atm

113 kPa = Z atm

To get the value of Z, cross multiply

Z atm x 101.325 kPa = 1 atm x 113 kPa

Z = ( 1 atm x 113 kPa) / 101.325 kPa

Z = 1.11 atm

Thus, the pressure is 1.11 atm

Answer:

The pressure will be 1, 83 atm

Explanation:

We use Boyle Mariotte's formula: for a given mass of gas at constant temperature, the pressure and volume vary inversely proportionally. We convert the unit ml into L: 111/1000= 0,111 L and 85/1000= 0,085 L.

P1xV1=P2xV2

P2= (P1xV1)/V2=(1,4 atm x 0,111L)/0,085L=1,83 atm

Answer:

-3

Explanation:

Answer:

C. The amount of solute that will dissolve in a given amount of solvent.

Explanation:

Solubility is the amount of solute that will dissolve in a given amount of solvent. Option 3 is correct.

A solution is a homogeneous mixture of two or more substances, where the substances are uniformly distributed throughout the mixture.

Therefore, the amount of solute that will dissolve in a given amount of solvent is referred to as solubility. The correct answer is option 3.

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Answer:

Upper B a superscript 2 plus, plus 2 upper N upper O subscript 3 superscript minus right arrow upper B a (upper N upper O subscript 3) subscript 2.

I think...

Answer: Upper N upper H subscript 4 superscript plus. and Upper S upper O subscript 4 superscript 2 minus.

Explanation: The spectator ions in this reaction are the ammonium ion and the sulfate ions.

In a reaction, not all of the ions are reacting. The ions not reacting are called the spectator ions.

When we eliminate such ions, we get an overall view of the reaction.

The reaction is:

     2NH₄⁺  + 2OH⁻ + 2H⁺ + SO₄²⁻ ⇒ 2NH₄⁺  + 2H₂O + SO₄²⁻

In ionic equations, water soluble reactants and products are split into their constituent ions while non-ionizing or gaseous reactants and products are represented as formulae or molecules.

 The species that are not reacting and appears on both sides are  2NH₄⁺ and SO₄²⁻ and are the spectator ions.

These non-reactive species are eliminated from the overall ionic equation that shows the reacting ions only.

Answer:

An internal force acts between elements of the system. ... Only external forces affect the motion of a system, according to Newton's first ... Newton's second law states that a net force on an object is responsible for its ... Prior to manned space flights, rocket sleds were used to test aircraft, missile equipment, and physiological

Explanation:

Answer:

3.0 L

Explanation:

V1/V2 = T1/T2

4.3L / V2 = 359K/250K

V2 = (4.3*250)/359 ≈ 3.0 L

The amount of energy transferred between the metal and the water is 500 cal.

The amount of energy transferred between the metal and the water can be calculated using the formula:

Energy = Mass of water × Specific heat of water × Change in temperature

Given that the initial temperature of the water was 25 °C and the final temperature was 35 °C, and the mass of the water was 50 g, we can substitute these values into the formula:

Energy = 50 g × 1 cal/g °C × (35 °C - 25 °C)

= 500 cal

Therefore, 500 cal of energy was transferred between the metal and the water.

Answer: it’s d on edunuity. (Hydrogen and oxygen)

Explanation:  

Answer: listen to relaxing music

Answer:

27.03 g/mol

Explanation:

Molar Mass of HCN

Mass of Hydrogen : 1.008

Mass of Carbon: 12.01

Mass of Nitrogen: 14.01

Molar Mass of HCN =

1.008 + 12.01 + 14.01=

27.03 g/mol

Answer:

1.atomic number

2.electron

3.element

4.atom

5.neutron

6.nucleus

7.proton

Explanation:

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The matching exercise pairs terms like 'atomic number' and 'electron' with their correct definitions. The sum of protons and neutrons in an atom's nucleus is the 'mass number,' and the space where electrons are most likely to be found around the nucleus is known as an 'electron shell.'

Now, to address the descriptions provided

(a) The sum of the number of protons and neutrons in an atom is known as the mass number.

(b) The defined space around an atom's nucleus, where an electron is most likely to be found, is called an electron shell or energy level.

Answer:

The correct term for the definition is Allele.

Answer:

6gm/cm³

Explanation:

It's simple,

The formula to Density is as follows,

Mass

Density = --------

Volume

Grams is a measurement of Mass and Cubic center meters is a measurement of Volume. Thats why we will fill in the formula like this,

54

D = -------

9

Then we divide to get,

D = 6

Next we fill in the units which are grams and cubic centimeters. The initials for the 2 are gm and cm³ so we'll combine those into this,

gm/cm³

Next we combine our answers which also brings us to our answer- 6 gm/cm³

Hope I was helpful,

Toodles