I have this question in science so someone please help me

Answer:

6.02 X 1023 molecules

Explanation:

Answer:

40.34 g

Explanation:

First, we divide the heat to release by the heat of combustion to obtain the required moles of compound:

541.20 kJ/(1160.00 kJ/mol) = 0.4665 mol

So, we have to burn approximately 0.47 mol of the compound. We convert the moles to mass in grams by using the molar mass:

mass = molar mass x moles = 86.47 g/mol x 0.4665 mol = 40.34 g

Therefore, you must burn 40.34 grams of the compound to release 541.20 kJ of heat.

Answer:

It helps shape, while holding and keeping organelles in their place.

Explanation:

Answer:

it holds the cell organelles

Explanation:

You are welcome

F = 13 N

Given

Acceleration= a = 2.6 m/s²

Required

Force

Solution

Newton's second law :

ΣF = m x a

The wheeled cart used in the experiment is the same, so the mass used is the same

We use one of the data for example data 1 to find mass :

F = 1 N, a = 0.2 m/s²

m = F/a

m = 1/0.2

m = 5 kg

so for acceleration= a = 2.6 m/s² :

F = 5 kg x 2.6 m/s²

F = 13 N

Answer:

3.33

Explanation:

acceleration= vf-vi/t

Answer:

organs group together to form organ systems

Explanation:

What part of the human body is most likely the wing would proabably from your elbow joint and the rest of your arm but most likely it would be the elbow joint.

Answer:

Explanation:

35.453 u

Answer:

biochemical research, animal metabolism studies, and ground water transport measurements.

Explanation:

Answer:

Carbon dioxide is a product (cellular respiration)

Carbon dioxide is a reactant(photosynthesis)

Carried out in animals(cellular respiration)

Carried out in plants(both)

Chemical reaction(cellular respiration)

Oxygen is a product(photosynthesis)

Oxygen is a reactant(cellular respiration)

Produces usable energy source(photosynthesis)

Your welcome!!! Plz mark brainliest.

Answer:attached is the correct answer

Explanation:

Photosynthesis and Respiration

Answer with Explanation:

1. An "x-ray image" shows the difference between the bones and soft tissues because the bones appear white in color while the soft tissues appear gray in color.  

2. The reason behind the difference in the appearance of bones and soft tissues on the x-ray film is their density. Bones are denser than soft tissues, which means that its atoms are closely-knitted when compared to the soft tissues that are far apart from each other. This allows the x-ray radiation to be absorbed by the bone while it passes through most of the soft tissues.

This is the reason why pregnant women are advised not to undergo an x-ray examination because the fetus is denser and it will surely absorb the x-ray radiation.

An X ray is a X wave radiation that can penetrate from a high EMR and has wavelengths that are shorter than the UV rays. The concept of X rays where discovered in 1895.

Learn more about the x-ray image show differences between bone and soft.

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Answer:

AuCl

Explanation:

Given parameters:

Mass of Gold  = 2.6444g

Mass of Chlorine  = 0.476g

Unknown:

Empirical formula  = ?

Solution:

Empirical formula is the simplest formula of a compound. Here is the way of determining this formula.

Elements                                     Au                                             Cl

Mass                                         2.6444                                     0.476

Molar mass                                 197                                          35.5

Number of moles                  2.6444/197                                 0.476/35.5

                                                 0.013                                           0.013

Divide by the

smallest                                 0.013/0.013                                 0.013/0.013

                                                       1                                                   1

The empirical formula of the compound is AuCl

Answer:

The element S creates an ion which is larger in size than the original atom.

Explanation:

The atomic radius of elements is a measure of the size of atoms of elements. The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. Atomic radius increases on going down the group in the period table but decreases on going rom left to right across a period in the periodic able. The increase in atomic radius on going down the group is due to the addition of an extra electron shell to successive atoms of elements in a group. However, atomic radius decreases across a period due to increase in the positive charge of the nucleus of elements in the same period.

When atoms of elements form ions, the ionic radius of the resulting ion can either increase or decrease. For positive ions, the ionic radii decreases due to  loss of electron increasing the attraction of the positive nucleus or even a complete loss of an electron shell. For anions, ionic radii increases due to gain of electrons which results in greater repulsion among neighboring electrons.

Among the elements given, rubidium (Rb), and calcium (Ca) for cations, hence, their size becomes smaller. Radon, Rn, being a noble gas is relatively inert, but forms positive ions when it does take part in reactions. Sulphur, S, however forms an anion, S²⁻, hence, its size increases.

Answer:

the cost is high..it uses alot of space...associated with pollution

Answer:

Coefficients are used in all chemical equations to show the relative amounts of each substance present. This amount can represent either the relative number of molecules, or the relative number of moles (described below). If no coefficient is shown, a one (1) is assumed.

Explanation:

Answer: In Thomson's model, the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges, like negatively charged “plums” surrounded by positively charged “pudding”. The 1904 Thomson model was disproved by Hans Geiger's and Ernest Marsden's 1909 gold foil experiment.

Explanation:

This is a collage question It's a hard one.

Answer:

neutrons are uncharged and electrons are negatively charged

Answer:

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.

Answer:

CrSO₃

Explanation:

Given parameters:

Mass of sample  = 3.78g

Mass of chromium  = 1.52g

Mass of sulfur = 0.88g

Mass of oxygen  = 1.38g

Unknown:

Empirical formula of the compound  = ?

Solution:

The empirical formula of a compound is the simplest formula of such a compound.

To solve this problem, follow the chart below:

Elements                           Cr                            S                       O

Mass                                1.52                         0.88                   1.38

Molar mass                       52                            32                      16

Number of moles           1.52/52                     0.88/32            1.38/16

                                        0.029                       0.028               0.086

Divide through by

the smallest                0.029/0.028            0.028/0.028       0.086/0.028

                                             1                                  1                          3

So,

The empirical formula is   CrSO₃

Answer:

Yes, its made of 1 types of atoms

Explanation:

Cu20 is Copper(I) oxide or cuprous oxide

Answer:

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

Explanation:

Answer:

Contribute evidence; help us understand how people use resources.

Explanation:

Environmental science can be defined as an interdisciplinary field of science that comprises of chemistry, economics, engineering, zoology, geography, geology, biology, ecology, physics, etc., used for the study and understanding of various environmental factors, issues in relation to human life.

Many disciplines are involved in environmental science, including chemistry and biology which contribute evidence and economics and political science which help us understand how people use resources in the production of goods and services to meet the need or requirements of consumer. These resources include land, labor, entrepreneurship and capital.

Answer:

I would say w is the answer

Answer

The answer is W

Answer:

They would all have the same volume.

Explanation:

Let us consider the same temperature and pressure of both Ar and CO₂ is standard temperature and pressure.

Standard temperature = 273.15 K

Standard pressure = 1 atm

Number of moles of CO₂ = 0.498 mol

Volume of CO₂ = ?

Solution:

PV = nRT

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

1 atm × V = 0.498 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 11.17 atm.L

V = 11.17 atm.L/1 atm

V = 11.17 L

Volume calculation for Ar:

Number of moles of Ar:

Number of moles = mass/molar mass

Number of moles = 19.91 g /39.95 g/mol

Number of moles = 0.498 mol

Number of moles are same thus it will occupy same volume. We can prove it through calculation given below,

PV = nRT

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

1 atm × V = 0.498 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 11.17 atm.L

V = 11.17 atm.L/1 atm

V = 11.17 L