balance the following chemical equations

the answer would be none of the above.

Answer:

1. The steps of the scientific method consist of seven things: Ask a question, get the research needed for a experiment, (What are you trying to find out? What materials do I need to complete the experiment? What are the procedures needed to complete the experiment?) create a hypothesis, (your educated guess on what you think the results of the experiment will be) conduct a experiment (complete multiple different trials preferably three) to test your hypothesis, make observations and record data during the experiment, draw a conclusion, (Was your hypothesis correct? Yes or no and explain why it is wrong or right) present your findings.

2. A hypothesis is a educated guess that the scientist believe will be the answer at the end of the experiment which is why they conduct a experiment in the first place to find viable data that will support their hypothesis.

3.  Predictions consist of theories that will test the hypothesis (educated guess) because they're the reasoning to why you believe your guess is correct.

4. A control group consists of variables that do not go through change during a experiment, things that remain the same.

5. Data can be presented in many different ways in the form of graphs, charts, or a research paper. You find the data by completing multiple different trials in a experiment, to make sure you have valid results to write down in your data research.

6. Remember that your hypothesis is your educated guess at the beginning of the experiment, what YOU thought was going to happen during the experiment and if the data you received during the experiment supports your hypothesis.

7. Your procedures, perhaps you measured a variable wrong, perhaps you used to much, or to little of a variable, all depends on your experiment.

8. Having people review and test your data by conducting their own experiments will not only make sure that your data is valid but it insures you even more of your conclusion, making it more accepted by other scientists.

Hope this helps.

Answer:

80.2

Explanation:

we subtract 18.2 from the total percentage which is 100%

The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. Therefore, the bond length of this compound will be 1.270 angstrom.

Dipole moment results due to the separation of charges in a compound. Dipole moment can occur between the two ions present in an ionic bond or between the atoms present in a covalent bond. Dipole moment occurs due to the differences in electronegativity of atoms. The larger the difference in electronegativity between ions, the larger the dipole moment of the compound.

The bond length of the compound can be calculated with the help of the formula:

Measured dipole moment = 1.11 D

Theoretical bond length = 4.8×bond length

Percentage ionic character =  (μ₁ / μ₂) × 100

where, μ₁ = μ theoretical,

μ₂ = μ experimental

Putting the values in formula we get,

18.2 = (1.11/ 4.8 × bond length) × 100

Bond length = (1.11/ 4.8 × 18.2) × 100

Bond length = 111/ 87.36

Bond length = 1.270

Therefore, the bond length of the dipole is 1.270 angstrom.

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Answer:

The most common treatments are surgery, chemotherapy, and radiation.

Explanation:

Answer:

The most common treatments are surgery, chemotherapy, and radiation.

Other options include targeted therapy, immunotherapy, laser, hormonal therapy, and others

Answer:

Copper reacts in acid

It has a high boiling point

Explanation:

Answer:wine

Explanation:it’s made from grapes

From the stoichiometry of the reaction, the mass of AgNO3 required is 340 Kg.

In the second step, 2 moles of AgI produces 1 mole of FeI2

In the third step, 2 moles of FeI2 produces 2 moles of I2

In the third step;

1000 moles of I2 is produced by 1000 moles of FeI2

2 moles of AgI produces 1 mole of FeI2

x moles of AgI produces 1000 moles of FeI2

x = 2 moles × 1000 moles/ 1 mole

x = 2000 moles

2000 moles of AgI is produced by 2000 moles of AgNO3

Mass of AgNO3 required = 2000 moles of AgNO3  × 170 g/mol = 340 Kg

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Explanation:

No because each has specific atomic number and atomic mass

Answer:

B.

Explanation:

Rust is a chemical change because you can not undo it. Rusting of iron is a chemical change because a new substance iron oxide is formed. The presence of oxygen and water or water vapour is essential for rusting.

Answer:

.

C.

As latitude decreases, average yearly temperature generally

Answer:

Wanna

Explanation:

J. Oing a meet its going to be fun yzn-dggf-jcq

because all students really need to have so may papers

Answer:

paper we get from trees in which we write even many knowledge and valuable things are written in paper which is of tree only.

food is necessary for human being to live stain live. it is because of food only.

wood is needed during the winter to keep ourselves warm it is also needed in cooking food at many villages and towns. and the main thing coal by which we get electricity is also made from wood only.

Answer:

DNA molecules are composed of four nucleotides, and these nucleotides are linked together much like the words in a sentence. Together, all of the DNA "sentences" within a cell contain the instructions for building the proteins and other molecules that the cell needs to carry out its daily work.

Explanation:

A strand of DNA is much like an extremely long sentence that uses only four letters. DNA actually has two strands, much like a zipper and the nucleotides are like the teeth of that zipper. This two-strand system is the key to how DNA is able to make copies of itself.

Answer:

50 millions years

Explanation:

1 to 1/2 to 1/4 to 1/8 to 1/16

It takes 4 half lives to get to 1/16 of the original amount

200 million/4 = 50 millions years

The half-life of the radioactive waste is 50 million years.

To calculate the half-life of the radioactive waste, we use the formula below.

Where:

Assuming: The original amount of the radioactive waste is y

From the question,

Given:

Substitute these values into equation 1

Solve for a

Equating the base

Hence, The half-life of the radioactive waste is 50 million years.

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Answer:

you'd take 3.03 and divide it by a mole that x100? maybe?

Explanation:

there are five valence electrons in Bismuth

Answer:

In the middle of every atom is the nucleus

Explanation:

The nucleus contains two types of subatomic particles, protons and neutrons.

Answer:

the middle of an atom is called nuclear which contains total number of protons and total number of neutron

Answer:

A

Explanation:

A, because the chemical causes a varies of heat waves that warms your hand but it also create good light to see in the dark

There are 0.0172 moles of chlorine gas initially in the vessel.

Suppose we take a look and consider the reaction between P4 and Cl2, the balanced chemical equation between them can be expressed as:

[tex]\mathbf{P_4 + 6 Cl _2 \to 4 PCl_3}[/tex]

Given that:

Using the Ideal gas equation, the number of moles of chlorine gas that were initially present in the vessel is:

PV = nRT

Making (n) the subject of the formula:

[tex]\mathbf{n = \dfrac{PV}{RT}}[/tex]

[tex]\mathbf{n = \dfrac{4.21 \ atm \times 0.1 \ L}{0.0821 \ atm.L/mol*K \times 298 \ K}}[/tex]

n = 0.0172 moles

Therefore, we can conclude that there are 0.0172 moles of chlorine gas initially in the vessel.

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Answer:

A molecule can be made up of two atoms of the same kind:)

Explanation:

hope that helps:))

Answer:

Explanation:

A compound is a makeup of molecules.

When you make a compound, you are combining molecules. But when you make a molecule, you are not combining compounds, you are combining atoms.

Examples:

Atoms:

[tex]\mathrm{H}[/tex] (hydrogen) and [tex]\mathrm{N}[/tex] (nitrogen)

Molecules:

[tex]\mathrm{H_2}[/tex] and [tex]\mathrm{N_2}[/tex]

Compounds:

[tex]\mathrm{H_2SO_2}[/tex] and [tex]\mathrm{NaCL}[/tex]

Take a look at the Compounds and Molecules section. The [tex]\mathrm{H_2}[/tex] in the example of a molecule is in one of the examples of the compounds, but the [tex]\mathrm{H_2SO_2}[/tex] (THE WHOLE THING) is not in the molecule. This shows how every compound is a molecule, but every molecule is not a compound.

Explanation:

It is called the : Esophagus

Answer:

First, the simple part: light exhibits dual nature. It exists as both particles and wave. So light can be considered as “particles” but not molecules.

Answer:

This is a simple stoichiometry problem using the ideal gas law.  

First, take the grams of ammonium carbonate and convert it to moles using its molar mass and dividing. 11.9 g/96.0932 g/mol= .12384 mol  

Now use a molar conversion using the balanced equation,  

1 mol (NH4)2CO3 ---> 4 mol gas formed (2 mol NH3 + 1 mol CO2 + 1 mol H2O) = .12384 x 4 = .49535 mol gas  

PV=nRT  

V=nRT/P= .49535mol (.08206 Lxatm/molxK) (296K)/ (1.03 atm)=11.682 L

Explanation:

Hope this helps

Can I get Braineist.

Stoichiometry is used to determine the mass and the moles of the reactants and the products. 48 gms of ammonium carbonate is required to produce 1 mole of ammonia.

Stoichiometry coefficients are the numbers before the molecules of the reactant or the product side of the reaction that presents the numerical quantity of the chemical species.

The balanced chemical reaction is given as:

(NH₄)2CO₃ → 2 NH₃ + CO₂ + H₂0

Hence, 2 moles of ammonia are produced from 1 mole of ammonium carbonate. So, 0.5 moles of ammonium carbonate will be needed to produce 1 mole of ammonia.

Mass of ammonium carbonate is calculated as:

Mass = moles × molar mass

= 0.5 mol × 96.09 g/mol

= 48 gm

Therefore, 48 gm of ammonium carbonate is required to produce 1 mole of ammonia.

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Answer:

Like about 5-6 days in the fridge.

Explanation:

Answer: Its a type of "network." A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply.

Explanation: Schools, factories, office buildings, and hospitals which have their own water systems. Transient Non-Community Water System (TNCWS): A public water system that provides water in a place such as a gas station or campground where people do not remain for long periods of time

Answer: Genetically modified plants may harm organisms that were never indented to be harmed.

Answer:

mass number = protons + neutrons i guess

Answer: 27 Hope it helps u

Answer:

false

Explanation:

matter is anything that has mass and takes up space

this includes subatomic particles,

atoms (whcih are made of subatomic particles)

elements (whcih consis of atoms)

molecules (which are made of atoms)

compounds (which are made of molecules)

mixtures (homogeneous and heterogeneous)

and even

black holes

cheemistry is the study of the composition, properties, structure and energetic reactions of matter