Н - О - Н
I have to find the Molecular formula

Answers

Answer 1
Answer
H2O is the answer

Related Questions

what does H2CO3 mean on the periodic table

Answers

Answer:

Carbonic acid

Best of luck

Carbonic acid........

You are making sweet tea. You add 56g of sugar into 78g if tea. What is the mass percent of sugar ?

Answers

Answer:

Approximately 72%

Explanation:

[tex]Sugar = 56g\\Tea's \:mass = 78g\\\\Sugar\:mass\:percentage = \\\frac{56}{78} \times 100\\\\\frac{5600}{78} \\\\=71.79\\Approximately \:72\%[/tex]

4.One rubber tire can generate about250,000 BTUS (1BTU=.0003KW ) when it is burned. The average American home consumes about 10,000 kWh of electricity per year. How many tires would be needed to meet the annual electricity demand of ten homes for one year if the production of electricity from tires is 50% efficient??

Answers

Answer:

The number of tires required to power ten homes for one year is approximately 2,730 tires

Explanation:

The given information are;

The energy generated by burning one rubber tire = 250,000 BTUs

1 BTU = 0.0003 kW

The amount of energy consumed by the average American home = 10,000 kWh

Therefore, the amount of energy generated by burning one tire in kW can be found as follows;

The energy generated by burning one rubber tire = 250,000 BTUs

1 BTU = 0.0003 kW

∴ 1 BTU × 250,000 = 250,000 BTUs = 0.0003 kW × 250,000 = 75 kW

We note that 250,000 BTUs is equivalent to 263764 kJ

1 kWh is equivalent to 3600 kJ

10,000 kWh = 10,000 × 3600 = 36,000,000 kJ

The energy requirement for ten homes  for one year = 10 × 36,000,000 kJ = 360,000,000 kJ

At 50% efficiency, the energy produced per tire = 0.5 × 263764 kJ = 131,882 kJ

The electrical energy produced per tire = 131,882 kJ/tire

The number of tires required to power ten homes for one year = 360,000,000 kJ/  131,882 kJ/tire = 2,729.71293  ≈2,730 tires

The number of tires required to power ten homes  ≈2,730 tires.

Which particles contribute to the atomic number and why ??

Answers

Answer:

the number of protons in the nucleus that are found in an atom is what determines an element's atomic number.why you may ask and thats because Protons contribute to the mass of an atom.(along with neutrons but they dont have a charge)but protons provide a positive charge to the nucleus.  

Explanation:

because the atom is electrically neutral, the number of electrons must equal the number of protons.

The particles that contribute to the atomic number are the number of protons. Protons contribute to the atomic number because it is positively charged and present inside the nucleus. The correct option is c.

What is the atomic number?

The quantity of protons in an atom's nucleus is known as the atomic number. The number of protons determines an element's identity. The atomic number contributes to the number of protons.

There are three subatomic particles present inside the particles. These are electrons, protons, and neutrons. The electron is negatively charged, a proton is positively charged, and a neutron is neutral.

Because the atom is electrically neutral, the number of electrons must equal the number of protons.

Thus, the correct option is c. protons.

To learn more about the atomic number, refer to the link:

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The question is incomplete. Your most probably complete question is given below:

a. atoms

b. neutrons.

c. protons.

d. electrons.

14C is an isotope of carbon that possesses:_______ a) 6 protons, 8 neutrons, and 2 electrons. b) 6 protons, 6 neutrons, and 2 electrons. c) 6 protons, 8 neutrons, and 6 electrons. d) 8 protons, 6 neutrons, and 2 electrons. e) 6 protons, 2 neutrons, and 6 electrons.

Answers

Answer:

Option C. 6 protons, 8 neutrons and 6 electrons.

Explanation:

14C has the following:

Mass number = 14

Atomic number = 6

Next we shall determine the number of protons in 14C. This can be obtained as follow:

Atomic number is simply the number protons in an atom. Thus,

Proton = Atomic number

Atomic number = 6

Proton = Atomic number = 6

Proton = 6

Next, we shall determine the number of neutrons in 14C. This can be obtained as follow:

Mass number = proton + neutron

Mass number = 14

Proton = 6

Neutron =.?

Mass number = proton + neutron

14 = 6 + neutron

Collect like terms

Neutron = 14 - 6

Neutron = 8

Finally, we shall determine the number of electrons in 14C.

This can be obtained as follow:

Since the isotope i.e 14C has no charge, it means that the atom is in it's ground state. Hence, the number of protons and the number of electrons are the same i.e

Electron = proton

Proton = 6

Electron = proton = 6

Electron = 6

From the above calculations, 14C has

6 protons, 8 neutrons and 6 electrons.

Which of the folling ion or atom has smallest size?
a. CI
b. CI-
c. K
d. K+​

Answers

A. Because the others don’t make sense

Why are the trends and exceptions to the trends in ionization energy observed? Check all that apply. -Ionization energy tends to increase down a group because the electrons get farther away from the nucleus. -Ionization energy tends to increase across a period because the nuclear charge increases. -Ionization energy tends to increase across a period because electrons are added to the same main energy level. -The ionization energies of the elements in Group 16 tend to be slightly smaller than the elements in Group 15 because the fourth electron is added to an unfilled p orbital. -The ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full s orbital shields the electron in the p orbital from the nucleus.

Answers

Answer:

2, 3, 5

Explanation:

just the person above

The correct answer is the Ionization energy tends to increase across a period because electrons are added to the same main energy level and the ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full S orbital shields the electron in the p orbital from the nucleus.

What is causing the ionization energy trend?The first ionization energy increases as you move left to right across a period on the periodic table. This is because when the nuclear charge rises, the outermost electron has become more tightly connected to the nucleus.

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An example of a physical property of an element is the element's ability to

Answers

Answer:

dissolve

Explanation:

When it dissolves , no chemicals are formed and it is considered as a physical property.

Answer:

what is it ???? I need help to

An unknown solid is placed on a scale and has a mass of 2.5 grams. The solid then displaces 35 mL of water in a graduated cylinder. Find the unknown solid’s density.

Answers

Answer:

The unknown solid’s density is 0.071 [tex]\frac{g}{mL}[/tex]

Explanation:

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

Archimedes' principle states that every body immersed in a fluid experiences a vertical and upward thrust equal to the weight of fluid dislodged. In other words, this principle says that the volume of the object is equal to the volume of the water displaced or displaced. So:

mass= 2.5 gramsvolume=35 mL

Replacing in the definition of density:

[tex]density=\frac{2.5 g}{35 mL}[/tex]

you get:

[tex]density=0.071\frac{g}{mL}\[/tex]

The unknown solid’s density is 0.071 [tex]\frac{g}{mL}[/tex]

Answer: The answer would be 0.071 g/cm^3

Explanation:

examples of white bloodcell

Answers

Answer: White blood cells help the immune system and help fight infection and disease.

If a falling rock undergoes a Δv of 112ms due to an a¯¯¯ of 9.8 m/s2, how long did it fall? A. 6.7 seconds B. 11.4 seconds C. 0.09 seconds D. 9.8 seconds

Answers

Answer:

11.4

Explanation:

You wont fail your quiz .

If a falling rock undergoes a Δv of 112ms due to a speed of 9.8 m/s2, it will take 11.4 seconds to fall.

What is speed?

The speed is the rate of change of position of an object with a given time of interval or per unit time then it is known as speed and it is the ratio of distance traveled to the time taken unit is meter per second.

The speed of an object is 9.8 m/s² distance traveled is 112m/s so the time will be,

                 Speed = distance / time

Substituting the value,

                  Time = distance/ speed

                  Time = 9.8 m/s² / 112m/s

                  Time =  11.4 seconds

Therefore, it will take 11.4 seconds to fall, if a falling rock undergoes a Δv of 112ms due to a speed of 9.8 m/s².

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What is a joule?
O A. A unit of measurement for mass
O B. A unit of measurement for power
C. A unit of measurement for energy
O D. A unit of measurement for gravity

Answers

Answer:

C. A unit of measurement for energy

Explanation:

Joule is the SI unit of

EnergyWorkAnd Heat

Unit of measurement of mass: Kilogram(Kg)

Unit of measurement of Power: Watt(W)

Unit of measurement of Gravity: m/s^2

Hope this helps ;) ❤❤❤

Answer:

C. A unit of measurement for energy

Explanation:

a p e x 2021!

a nickel atom (atomic symbol Ni) has an atomic number of 28 and has an atomic mass of 59. how many neutrons does it have ??

Answers

Answer: 31 neutrons

Explanation:

225 mm=_____hm
this is a 2-step problem

Answers

To find how many hectometers this is, we can divide the amount by 100,000.

225 / 100000 = 0.00225

Therefore, 225mm = 0.00225hm

Best of Luck!

what is the atomic number, mass number, element symbol, group number, and period number for oxygen?

Answers

Answer:

Atomic no. = 8

Mass no. = 16

Period no. = 2

Group no. = 6

4) Which is a characteristic of a solution? * Its particles scatter light. Its particles are evenly distributed. Its particles settle out.

Answers

Answer: The correct answer is B. It’s particles are evenly distributed. (:

Explanation:

Answer:

b

Explanation:

A color-coded periodic table. Which elements are metals? Check all that apply. rhenium (Re) boron (B) lithium (Li) krypton (Kr) phosphorus (P) mercury (Hg)

Answers

Answer:

re) li) hg)

Explanation:

Rhenium, lithium, and mercury are metals

If the density of a substance is d=2.1g/cm^3 what is the mass of 20.0mL of this substance

Answers

Answer:

Explanation:

density = mass (g)/ volume (cm3)

    2.1 =   mass / 20 cm3

     mass = 42 g

be attention that each 1 ml =1cm3                    

a sample of a substance has a mass of 52.5g and displaces a volume of 4.2ml. what is the density of the substance

Answers

Answer:

Density = 12.5 g/mL

Explanation:

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

[tex]Density = \frac{mass}{volume} [/tex]

From the question

mass = 52.5 g

volume = 4.2 mL

Substitute the values into the above formula and solve for the density

We have

[tex]Density = \frac{52.5}{4.2} \\ [/tex]

We have the final answer as

Density = 12.5 g/mL

Hope this helps you

A small snail makes a journey that takes him in a circle of area 0.750square meters in one day. What is the area of the circle that the snail makes in square inches? Round to three significant figures. Do not give the units in your answer.

Answers

Answer:

1160

Explanation

1 square meter = 1550 square inches

[tex].0750 square meters * \frac{1550 square inches}{1 square meter}[/tex] = 1162.5 becomes 1160 when rounded to 3 sig figs.

The area of the circle of 0.750 m² is equivalent to 1.16 × 10³ in².

We want to convert 0.750 m² to in². We will use the conversion factor 1 in = 0.0254 m, squared.

[tex]0.750 m^{2} \times (\frac{1in}{0.0254m} )^{2} = 1.16 \times 10^{3} in^{2}[/tex]

The area of the circle of 0.750 m² is equivalent to 1.16 × 10³ in².

You can learn more about unit conversion here: https://brainly.com/question/19420601

What is the volume of 88.2 g of silver metal (density = 10.50 g/cm^3)

Answers

Answer:

The answer is

8.4 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} [/tex]

From the question

mass = 88.2 g

density = 10.5 g/cm³

The volume is

[tex]volume = \frac{88.2}{10.5} [/tex]

We have the final answer as

8.4 mL

Hope this helps you

Answer:

8.4 km

Explanation:

Which part of an atom is mostly empty space?
A) Nucleus
B) Proton cloud
C) Electron cloud
D) Neutron

Answers

I’m pretty sure it’s B

Hope that helps

Answer:

Answer is C. Electron cloud

Explanation:

<3

It takes Serina 0.25 hours to drive to school. Her route is 16 meters long. What is
Serina's average speed on her drive to school? *

Answers

Answer:

60 (1 hour) × 0.25 = 15 minutes

15 ÷ 16 = 0.9375 meters per minute

what is Alkanoic acid​

Answers

Answer:

an aliphatic acid (such as hexanoic acid) regarded as derived from an alkane and containing the same number of carbon atoms as the alkane.

Explanation:

Answer:

Acetic acid, systematically named ethanoic acid, is a colourless liquid organic compound with the chemical formula CH₃COOH. When undiluted, it is sometimes called glacial acetic acid. Vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water.

Which type of scientist
studies everything
from the tiniest
organisms to human
beings?

Answers

Answer:

Biology

Explanation:

Biology is the study of all living beings. From the smallest algae or micro organism to the biggest living being is all covered under biology. How micro organisms live, how do they function and how they affect other living beings is studied in biology.

Answer:

Micro bioligist

Explanation: hope this helps

1. What is one example of a chemical reaction?

Answers

Answer:

AN EXPLOSION

Explanation:

Answer - A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.

A 1.0 m solution of a compound with 2 ionizable groups (pka's = 6.2 and 9.5; 100 ml total) has a ph of 6.8. what are the concentrations of the relevant acid and conjugate base?

Answers

Answer:

[H₂A] = 0.2M

[HA⁻] = 0.8M

Explanation:

A compound with 2 ionizable groups has as equilbriums:

H₂A ⇄ HA⁻ + H⁺ ⇄ A²⁻ + H⁺

A pH of 6.8 is near to the first equilibrium:

H₂A ⇄ HA⁻ + H pKa = 6.2

To determine concentrations of the acid H₂A and conjugate base HA⁻ we use H-H equation:

pH = pKA + log [HA⁻] / [H₂A]

6.8 = 6.2 + log [HA⁻] / [H₂A]

0.6 = log [HA⁻] / [H₂A]

3.981 = [HA⁻] / [H₂A] (1)

As concentration of the buffer is 1.0M:

1M = [HA⁻] + [H₂A] (2)

Replacing (2) in (1):

3.981 = 1- [H₂A] / [H₂A]

3.981[H₂A] = 1 - [H₂A]

4.981 [H₂A] = 1

[H₂A] = 0.2M

And [HA] = 1M - 0.2M = 0.8M

71. Chloroform is a liquid once used for anesthetic. What is the volume of 5.0 g of chloroform. The density of chloroform is 1.49 g/mL.

Answers

Answer:

Volume, V = 3.35 mL

Explanation:

Given that,

The density of chloroform is 1.49 g/mL

We need to find the volume of 5.0 g of chloroform. Let V is its volume.

Density is equal to mass per unit volume.

[tex]d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{5\ g}{1.49\ g/mL}\\\\V=3.35\ mL[/tex]

So, the volume of 5 g of chloroform is 3.35 mL.

What has mass?
A. Energy
B. Heat
C. Light
D. Matter

Answers

Answer:

matter

Explanation:

Answer:

matter is your answer

hope this helped

What is the mass of substance that exactly fills a 247.2 mL container? The density of the substance is 0.81 g/mL. Give the answer with two decimals.

Answers

Answer:

mass = 200.23 g

Explanation:

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

[tex]Density = \frac{mass}{volume} [/tex]

Since we are finding the mass

mass = Density × volume

From the question

Density = 0.81 g/mL

volume = 247.2 mL

Substitute the values into the above formula and solve for the mass

mass = 0.81 × 247.2

= 200.232

We have the final answer as

mass = 200.23 g to 2 decimal places

Hope this helps you

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