i need help on question 3 true or false thxxx quick i’m timed

Answer:

Mass = 25.2 g

Explanation:

Given data:

Number of formula units of NaHCO₃ = 1.8×10²³

Mass in gram = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ formula unit

1.8×10²³formula unit × 1mol  /  6.022 × 10²³ formula unit

0.3 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 0.3 mol × 84 g/mol

Mass = 25.2 g

Answer:

deposition

Explanation:

Answer:

B

Explanation:

Answer:

There would be no energy for cellular activities

Explanation:

Cellular respiration is the process whereby living organisms breakdown ingested food in their cells in order to obtain energy in form of ATP. In other words, respiration converts the stores energy in food molecules into usable energy by the cell. The general equation of the process is as follows:

C6H12O6 + 6O2 → 6CO2 + 6H2O

The process of cellular respiration is carried out by every living organism in order to obtain energy to perform their various metabolic activities. Hence, without RESPIRATION, there would be no energy (ATP) for use by the cell, which utterly means no cellular activities will take place.

Answer:

N2H4

Explanation:

Answer:

NaCI

Explanation:

Answer:

Explanation:

we know that ideal gas equation is

PV=nRT

P=nRT/V

V=10.3L

n=10.67

T=21.2+273=294

R=0.0821

P=10.67*0.0821*294/10.3

P=25.00atm

Answer:

P = 25.0 atm

Explanation:

Given data:

Volume of gas = 10.3 L

Number of moles of Cl₂ = 10.67 mol

Temperature = 21.2 °C

Pressure of gas = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

21.2+273 = 294.2 K

10.3 L × P = 10.67 mol ×  0.0821 atm.L/ mol.K  × 294.2 K

P = 257.72 atm.L /  10.3 L

P = 25.0 atm

Answer:

252

Explanation:

7(36) = 252

Answer:

D

Explanation:

Glucose is produced through a process powered by sunlight that consumes Carbon Dioxide and produces oxygen as a waste product.  In order for glucose to be produced, Carbon dioxide (a compound) must be, in essence, converted into a completely different chemical: dioxygen.

Photosynthesis is biochemical process by which green plants produce energy and release oxygen. Glucose is produced in this reaction and thus it is a chemical change. Thus, option D is correct.

The change in a substance if involves any bond making or bond breaking then it is called a chemical change. Whereas, if the substance just changes from one phase or state to the other it is called a physical change.

All chemical reactions are chemical changes involving bond making or breaking or both. Photosynthesis is a biochemical reaction takes place in plant leaves with the aid of light energy.

Photosynthesis involves several stages where an electron transport chain, various oxidising and reducing agents are performing significant roles.

The net reaction in photosynthesis is the combination of water and carbon monoxide to form molecular oxygen and glucose. Therefore, there occurs bond making and breaking. Thus option D is correct.

To find more about photosynthesis, refer the link below:

https://brainly.com/question/1757345

#SPJ2

Answer:

uhhh well ig btw what plant

Explanation:

it would be more sunlight to

Answer:

6. mass=1930g

7.64.10ml

Explanation:

6. mass=density time volume

7.volume=mass divide by density

Answer:

B. SO2

Explanation:

An Ionic bond transfurs electrons and occurs with metals and nonmetals

Covalent is the sharing of electrons and occurs with nonmetals only.

Burning fossil fuels emits a number of air pollutants that are harmful to both the environment and public health. Sulfur dioxide (SO2) emissions, primarily the result of burning coal, contribute to acid rain and the formation of harmful particulate matter.

Answer:

No

Explanation:

Because they helps us to make oil and is not harmful to us

Answer:

4 atoms of oxygen

Explanation:

Answer:

For any given element, ionization energy increases as subsequent electrons are removed. For example, the energy required to remove an electron from neutral chlorine is 1251 kJ/mol. ... An even sharper increase in ionization energy is witnessed when inner-shell, or core, electrons are removed.

Hope it helps :)

Answer:

Has 5 protons and the atomic number is 5.

Explanation:

The atomic number is equal to the number of protons and every element has a different number of protons. Therefore, finding how many protons there are and comparing to atomic numbers (or vice versa) would allow you to find if the atom is boron.

Answer:

21 is ionic aicid only one 1 know

Al2O3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2O(l)

Moles of Al2O3, m = 3.58 moles.

We need to find the mass of AlCl3 produced.

Solution :

1 mole of Al2O3 produce 2 moles of AlCl3.

So, 3.58 moles of AlCl3 produce 7.16 moles of AlCl3.

Mass of AlCl3 produced is :

m = moles × molecular mass of AlCl3

m = 7.16 × 133.34 g

m = 954.714 g

Therefore, mass of AlCl3 produced is 954.714 g.

Hence, this is the required solution.

Answer:

Combination reaction or synthesis reaction

Explanation:

Given reaction:

                 CO  +  H₂O  →  H₂CO₃

The type of reaction shown above is a combination or synthesis reaction. A combination reaction is one in which a single product is formed from two or more reactants.

In the given reaction carbon monoxide combines with water to produce hydrogen carbonate.

The formation of compounds from the union of their constituent elements falls into this category of reactions.

Answer:

Explanation:

Atom 1 and 4 because they have the same number of valence elctrons in its outermost shell

Answer:

Radiation is energy. It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects.

Related information in Spanish (Información relacionada en español)

On this page:

Ionizing and non-ionizing radiation

Electromagnetic spectrum

Types of ionizing radiation

Periodic Table

Non-Ionizing and Ionizing Radiation

There are two kinds of radiation: non-ionizing radiation and ionizing radiation.

Non-ionizing radiation has enough energy to move atoms in a molecule around or cause them to vibrate, but not enough to remove electrons from atoms. Examples of this kind of radiation are radio waves, visible light and microwaves.

Ionizing radiation has so much energy it can knock electrons out of atoms, a process known as ionization. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes. Ionizing radiation comes from x-ray machines, cosmic particles from outer space and radioactive elements. Radioactive elements emit ionizing radiation as their atoms undergo radioactive decay.

Radioactive decay is the emission of energy in the form of ionizing radiationHelpionizing radiationRadiation with so much energy it can knock electrons out of atoms. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes.. The ionizing radiation that is emitted can include alpha particles, beta particles and/or gamma raysHelpgamma raysA form of ionizing radiation that is made up of weightless packets of energy called photons. Gamma rays can pass completely through the human body; as they pass through, they can cause damage to tissue and DNA.. Radioactive decay occurs in unstable atoms called radionuclides.

Explanation:

Answer:

D

Explanation:

hope this helps

Hey there!:

Density = 0.6 g/mL

Volume = 150 mL

Mass = ?

therefore:

D = m / V

0.6 = m / 150

m = 0.6 x 150

m = 90.0 g of sugar

Hope this helps!

1 day = 1440 minutes

2 days = 2880 minutes

2 days = 62 words per minute× 2880 minutes

2 days = 178560 words

Therefore she can type 178560 words in 2 days if she can type at 62 words per minutes

Answer: To your project!!

Experiment Half-Life

a. My hypothesis is that when we get through 6 half-life’s you will be left with no atoms, and each time the atom number will decrease. Half of my hypothesis was correct whilst the numbers did decrease we, after 6 trials were left with one undecayed atom.

b.what is a half life?

the time required for the decay of one-half of the atoms in a sample of radioactive material

c. When does a radioactive sample emit the largest number of decay particles? when it first starts to decay

Why is this information important? Half-Life and decay is important today because it helps us determine the date of death and birth of ancient mummies.

d. Do you think the shape of the curve on your graph would change if you increased the half-life to 20 seconds? Yes different data would arise and that would change the graph.

What does this reveal about radioactive decay? The longer a material or substance takes to decay the larger the amount of decayed material or substance will come from the substance

e. Do you think the shape of the curve on your graph would change if you started with a smaller sample, say 50 atoms (pennies)? Yes, again different data would arise and that would change the graph.

What does this reveal about radioactive decay? The smaller the sample the quicker it will decay. And the less product that comes from the sample.

Your project is done, it worked for me hope it does for you? DON'T USE THE EXACT SAME WORDS IT'S SUS

here is the graph too!

Answer:

Hey I dont know if you got the same project as me but I had to record pennies and make a graph so I recorded pennys here

Explanation:

first half-life =  tails 49 : heads 51

second half-life = tails 19 : heads 29

third half-life = tails 8 ; heads 11

fourth half-life = tails 2 ; heads 6

fifth half-life = tails 1 ; heads 1

sixth half-life = I didnt know what to say so I put 1

hope this helps someone

Answer:

6 oxygen atoms

Explanation:

Answer:

Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.

Answer:

Sunlight hits the solar panels, and creates an electric field. The electricity generated flows to the edge of the panel, and into a conductive wire. The conductive wire brings the electricity to the inverter, where it is transformed from DC electricity to AC, which is used to power buildings.

Explanation:

hope this help

brainliest please!!!!

Answer:

Explanation:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D).  The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.  (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.)

Answer:

The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.

Explanation: