Which statement best describes the usefulness of a model to investigate molecules at the microscopic level?(1 point)
A model’s usefulness depends on whether direct observations of phenomena can be made.
All models are useful.
A model’s usefulness depends on the accuracy of its predictions.
Models are not useful at all.

Answers

Answer 1

A statement best describes the usefulness of a model to investigate molecules at the microscopic level: A model’s usefulness depends on the accuracy of its predictions.

About scientific model

In science, a model is a representation of an idea, an object or even a process or a system that is used to describe and explain phenomena that cannot be experienced directly. Models are central to what scientists do, both in their research as well as when communicating their explanations.

Models in marine science

Prof John Montgomery discusses how and why scientists use models, with climate change as an example.

Models are a mental visual way of linking theory with experiment, and they guide research by being simplified representations of an imagined reality that enable predictions to be developed and tested by experiment.

Why scientists use models

Models have a variety of uses – from providing a way of explaining complex data to presenting it as a hypothesis. There may be more than one model proposed by scientists to explain or predict what might happen in particular circumstances. Often scientists will argue about the 'rightness' of their model, and in the process, the model will evolve or be rejected. Consequently, models are central to the process of knowledge-building in science and demonstrate how science knowledge is tentative.

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Related Questions

1 How do I make a girl blush?
2 How do I know if I girl might like me by looking at her body language?

Answers

Answer:

1. Make Her Smile with You. Your smile is something which can turn the tables for you, if you possess a nice smile then it is no doubt a plus point for you or flirt with her.

2. She tilts her head while looking at you.

She constantly 'fixes' her hair, makeup, or clothing.

She returns your physical touches.

She stares or looks over at you a lot.

She blushes around you.

Explanation:

What cloud does cirrus and cumulus make???

Answers

Answer:

They're sometimes called 'mackerel skies' because they can sometimes have a grayish color which makes the clouds look a bit like fish scales. Cirrocumulus clouds exhibit features from both cumulus and cirrus clouds but should not be confused with altocumulus clouds.Explanation:

Which of the following radiations is attracted to the positive electrode?
a.Alpha and beta particle
b.Alpha particle and neutron
c.Photon
d.Beta particle

Answers

The best answer for this is C

If you want to change the mass of your atom by 1 or more mass units, you can ether
(2 RIGHT CHOICES)
add a proton
add a neutron
add an electron

Answers

If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.

Explanation:

Option A and Option B is your answers.

To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )

The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.

The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.

Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom

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The shape of the directly sunlit portion of the Moon as viewed from
Earth

Answers

your answer:

lunar phases

What is the chemical formula for this?

Answers

Answer:

-OOH

Explanation:

This forms an acid if it comes in contact with a metal

Answer:

HO2; Hydroperoxyl

Explanation:

Since there are two oxygen molecules, and one hydrogen molecule, it can be classified as a hydroperoxyl molecule.

It is an inorganic compound with the following characteristics

Covalent compound (O,H are nonmetals) Valence of O (O must form an octet): 6 Valence of H: 1 Total valence electrons: 13 Molar mass: 33.01 g/mol

Where are Gold, Limestone and kaiolin found.

Answers

Gold is usually found embedded in quartz veins, or placer stream gravel, The most common place to find limestone is beneath the marine waters. Ocean conditions form the rock as organisms, animal skeletons, and calcium carbonate combine, Kaolinite is a layered silicate clay mineral which forms from the chemical weathering of feldspar or other aluminum silicate minerals. It is usually white, with occasionally a red color impurity due to iron oxide, or blue or brown from other minerals.


How many chlorine atoms are there in 100 g of carbon tetrachloride

Answers

Answer:

1.566x10²⁴ atoms of Cl

Explanation:

In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:

Moles CCl₄: 153.82g/mol

100g * (1mol / 153.82g) = 0.65 moles CCl₄

Moles Cl:

0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl

Atoms Cl:

2.6 moles Cl * (6.022x10²³ atoms / mol) =

1.566x10²⁴ atoms of Cl

How many moles are there in 2.35x10^23 molecules of water

Answers

Answer:

0.39017 moles

Explanation:

a mole is 6.023×10^23

(2.35×10^23)÷(6.023×10^23)=0.39017

what is rasching process only chemical reaction

Answers

Answer:

The Raschig process, the original commercial production process for hydrazine, involves oxidation of ammonia to chloramine with sodium hypochlorite, then further reaction of the chloramine with excess ammonia and sodium hydroxide to produce an aqueous solution of hydrazine with sodium chloride as a by-product.

Answer: The Rasching process is  a chemical process for the producing phenol

Explanation:

An alpha particle is identical to a:

helium nucleus
hydrogen nucleus
high energy electron
radium nucleus

Answers

The answer is
Helium
Hope this helped

Answer: helium nucleus

HELP HELP HELP !!!!!!!!!!!!!!

Answers

Answer:

approximately 83.33

Explanation:

The formula for the area of a right square pyramid is:

V= a^2(h/3)

a= base edge

h= height

The height is 10 inches, and the base edge is 5 inches. Plug it in to the formula:

V= 5^2 (10/3)

V= 25 (10/3)

V= 83.33 in^3

number 1 ............​

Answers

Answer:

I am guessing it is B. Non-metal, metals, metalloids

B. Metals, Non-Metals, Metalloids



Metals: located in the South and West of Periodic Table. Tend to give up electrons (form cations) and form simple ionic compounds with non-metal anions. Most of the 118 known elements are metals.


2. Non-Metals : located in the North and East of the Periodic Table. Tend to attract electrons (form anions) and combine with metal cations to make ionics, or share them with other non-metals and form covalent compounds . There are nineteen nonmetals, if we consider the ‘latest” two, which are not well characterized and have fleeting lifetimes.


3. Metalloids: straddle a staircase-like region between metals and non-metals. Their properties are intermediate between metals and non metals (in varying proportions). There are only seven metalloids.


So the answer is B ❤️

How many moles are in 46.7g of H2O gas?

Answers

46.7 g=total mass
18.02=18 g= H2O’ molar mass

46.7/18= 2.59.... moles =3 moles
Remember to round

How would these organisms be arranged in a food chain, beginning with the producers?


Drag and drop each organism into the order they would be arranged in a food chain, with the producers at the top.
help me pls this due today

Answers

Answer:

grass, grasshopper, frog, snake, hawk

Explanation:

What kind of question is this

There
are
approximately
317,000,000
people
in
the
U.S.,
and
the
area
of
the
U.S.
is
about
4,000,000
square
miles.

If
the
people
were
spread
out
evenly,
about
how
many
people
are
there
per
square

Answers

Answer:

yesddgfhzxhcvnjxkcncjzdkccchjjbxbxbbk

Which molecule is butyne?
H,C CH,
ОА. С=С
н Н
В.
н нннн
| | | | |
Ос. Н-с-с-с-с-с-н
1 І
Н Н Hн Н

| |
OD. н-c=C-с-с-н
ТІ

Answers

Answer:

H,C CH,

Explanation:

When solving mass to mass stoichiometry problems, where do you get the molar ratio for the first and second chemicals?

Answers

In the mole ratio. If you have moles of one substance. And the coefficients from the balanced equation you can use the ratio to figure out the moles of the other compounds.

The fictional element “Nt” contains atoms with two valence electrons. Which type of intermolecular force is most likely responsible for the properties of NtF2?
O dipole-dipole forces
O ion-ion forces
O hydrogen bonding
O dispersion forces

Answers

ion-ion forces

Nt has two valence electrons, and bonds with F to form NtF2. This means that the ion form of Nt is Nt2+. This means that NtF2 is an ionic compound.

moreee help science plsssssssssssssssss helpp

Answers

I think the ani is c

what is the order in which types of elements are found as you move from left to right across a period? metals, nonmetals, and metalloids?

Answers

Answer:

metals, metalloids, nonmetals

Explanation:

a p e x, just took the quiz

The order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.

Metals

When we move from left to right across a period Metals are located on the left hand side of the periodic table. Metals have high thermal conductivity.

Metalloids

When we move from left to right across a period Metalloids are located between metals and nonmetals. Metalloids are present p-block elements. Metalloids have good thermal conductivity.

Nonmetals

When we move from left to right across a period Nonmetals are located on the right hand side of the periodic table. Non metals have low melting point and boiling point.  Non metals have low thermal conductivity.

Thus, from conclusion we can say that the order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.

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A una sustancia que tenia una etiqueta poco legible se le determina de iones de 3.16x10 a la -10 M.Calcula su pH determina si se trata de jugo de naranja o leche magneisa

Answers

Answer:

pH = 9.44, leche de magnesia

Explanation:

Número de iones [H⁺] de 3.6x10⁻¹⁰M

El pH es una medida en química utilizada para determinar si una sustancia es ácida o básica.

Si el pH < 7 La sustancia será ácida (Jugo de Naranja)

Si el pH > 10 La sustancia será básica (Leche de Magnesia)

Ahora, el pH es definido como el -log[H⁺], el pH de la solución será:

pH = -log[3.6x10⁻¹⁰M]

pH = 9.44

Como el pH > 7, probablemente se trate de leche de magnesia

I got c, just wondering was it right?

Answers

Answer:

Yes you are right.

Explanation:

Answer:

yeah it´s right

Explanation:

How many moles of H2 can be made from the complete reaction of 1.5 moles of Al? Given: 2 Al + 6 HCl → 2 AlCl3. + 3 H2

Answers

Answer:

2.25 mol H₂

Explanation:

To calculate mol of H₂ ensure that the equation is balanced. Then use the equation and dimensional analysis to convert the given 1.5 mol Al to mol of H₂.

How can you Weigh more on the earth than you would on the moon and still have the same mass in both places.

Answers

Answer:

Your Mass never changes but your weight can..

Explanation: This all depends on gravity..

Answer:

its because of gravity your mass doesn't change but the gravity does and the  gravity from earth and on the moon is way different.please choose me as brainliest

I’m really confused can someone help me?

Answers

The 2nd energy level can hold a maximum of 8 electrons.

Answer:

the second energy level can hold a maximum of eight electrons

A sports car requires 10 kg of 93 octane to fill the tank. How many grams of octane are in the tank when it is full?

Answers

Answer:

There are 10,000 grams of octane in the tank of the sports car when it is full

Explanation:

To solve this problem, we simply need to convert the mass of octane- 93  from kilograms to grams, using the standard conversion factor which is given below.

it will take 10kg of octane-93 to  fill up the tank

1 kg = 1000grammes

therefore 10 kg = 10 X 1000 = 10,000 grams.

Hence, there are 10,000 grams of octane in the tank of the sports car when it is full.

Which term describes the molecule shown below?
H-C=C-H
ethyne CxHy
A. Unsaturated alkene
B. Unsaturated alkyne
O C. Saturated alkyne
O D. Saturated alkene

Answers

Answer:

Saturated alkyne

Explanation:

The hydrocarbons are known as the compounds which is made up of only carbon and hydrogen atoms. They may be saturated or unsaturated based on the number of bonds present. The molecule H-C≡C-H is an Unsaturated alkyne. The correct option is B.

The hydrocarbons in which the carbon and hydrogen atoms are connected through double or triple bonds are known as unsaturated hydrocarbons. Here ethyne is an unsaturated hydrocarbon.

Ethyne is an alkyne which have the C-C  and C-H atoms connected through triple and single bonds.

Thus ethyne is option B.

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Which flows through the other?

Answers

Is there a picture, or.

How many moles of ammonia are produced due to the reaction with two moles of nitrogen?

Answers

Answer:

17.03052 mutiple by 2

34.06104grams

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