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3 years ago

What would be the advantage of using a molecular model.

Chemistry

1 answer:

ddd [48]3 years ago

7 0

Answer: Can pick it up and hold it, can rotate groups about bonds

and can look for symmetry

Explanation: A molecular model is a plastic model with interchangeable balls. Represents molecules and their processes.

The creation of mathematical models of molecular properties and behavior is molecular modelling, and their graphical depiction is molecular graphics, but these topics are closely linked and each uses techniques from the others.

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How many moles of air are there in a human lung with a volume of 2.4 L at STP? Explain your answer

ollegr [7]

One mole of any gas at STP is about 22.4 liters (even for mixtures). This number comes from the ideal gas equation by setting n=1 and STP conditions:
V=nR/P =1 mole x 0.08206Latm/molK x 237K/1atm = 22.4L

so jsut divide: 893L/22.4L/mole = 39.9 moles

5 0

3 years ago

Most of the sulfur used in the United States is chemically synthesized from hydrogen sulfide gas recovered from natural gas well

galben [10]

Answer:

$0.21\ \text{kg/s}$

Explanation:

P = Pressure = $0.48\ \text{atm}=0.48\times 101325\ \text{Pa}$

V = Volume = $450\ \text{L/s}=450\times 10^{-3}\ \text{m}^3/\text{s}$

R = Gas constant = $8.314\ \text{J/mol K}$

T = Temperature = $(264+273.15)\ \text{K}$

The reaction is

$2H_2S+3O_2\rightarrow 2SO_2+2H_2O$

From ideal gas equation we have

$PV=nRT\\\Rightarrow n=\dfrac{PV}{RT}\\\Rightarrow n=\dfrac{0.48\times101325\times 450\times 10^{-3}}{8.314\times (264+273.15)}\\\Rightarrow n=4.9\ \text{mol}$

Moles of $SO_2$ produced is

$\dfrac{2}{3}\times 4.9=3.267\ \text{moles}$

Molar mass of $SO_2$ = 64.066 g/mol

Production rate is

$3.267\times 64.066=209.3\ \text{g/s}=0.21\ \text{kg/s}$

The rate at which sulfur dioxide is being produced $0.21\ \text{kg/s}$ .

3 0

3 years ago

In humans, free earlobes are dominant and attached earlobes are recessive. The pedigree shows the transmission of attached earlo

Anna11 [10]

Answer:

By analyzing a pedigree, we can determine genotypes, identify phenotypes, and predict how a trait will be passed on in the future. The information from a pedigree makes it possible to determine how certain alleles are inherited: whether they are dominant, recessive, autosomal, or sex-linked.The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.Changes (mutations) to genes can result in changes to proteins, which can affect the structures and functions of the organism and thereby change traits. Variations of inherited traits between parent and offspring arise from genetic differences that result from the subset of chromosomes (and therefore genes) inherited.

Explanation:

8 0

3 years ago

Are all isotopes radioactive?

Naddika [18.5K]

All ARTIFICIAL isotopes are radioactive

6 0

2 years ago

Water, H2O, is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared __________

adell [148]

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

<h3>What kinds of bonds exist?</h3>

Covalent bonds: These are formed between nonmetals and electrons by sharing electrons.
Ionic bonds: These are formed between metals, which lose electrons, and nonmetals, which gain electrons.
Metallic bonds: There are formed between metals. Electrons are delocalized in a cloud.

Water, H₂O, is a molecule made of 2 nonmetals: oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons, and known as covalent bonds.

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

Learn more about chemical bonds here: brainly.com/question/6071754

5 0

3 years ago