A metal Q forms an oxide when 10. 4g of it reacts with 7. 48dm³ of oxygen gas at 27°C and a pressure of 100KPa. (i) Determine the formula of the oxide

(ii) Calculate the percentage by mass of oxygen in the oxide

Atomic masses[ Q=52. 0 O=16. 0]

Answer:

Chitin

Explanation:

A fly's main body is made of a thorax and an abdomen. These parts are covered by a hard exoskeleton made of a bony substance called chitin.

The exoskeleton of a housefly is made up of chitin. Thus, the correct option for this question is B.

The Exoskeleton may be defined as a tough and rigid external covering present in some invertebrate animals like arthropods. It supports and protects the animals with respect to their external environment.

The main body of a housefly is significantly divided into two regions, i.e. a thorax and an abdomen. The thorax region is further divided into three parts i.e. prothorax, mesothorax, and metathorax.

All these parts of a housefly are remarkably covered by a tough exoskeleton that is constructed of chitin. The housefly has a hard exoskeleton that protects it from moisture loss.

Therefore, the exoskeleton of a housefly is made up of chitin. Thus, the correct option for this question is B.

To learn more about Exoskeleton, refer to the link:

https://brainly.com/question/1619995

#SPJ2

Answer

What website is this question on?

Explanation:

Answer:

1. true or false: A compound is a substance made of entirely of a single type of atom. answer: true

2. true or false: fig is a mixture of water droplets in air. imma just say its false

Explanation:

3. draining the liquid from a mixture of a liquid and a solid after the particles of the solid substance have settled

^ ^

answer : filtration

sifting

decanting

filtration  

by the way ur teacher is a FiretrUCKING geek he/she looked this up on a quiz

Answer:

6

Explanation:

Magnesium=24

helium= 4

24:4=6

I. The object's temperature change.

II. The object's original volume

Thermal expansion is the process through which a solid object's volume generally tends to grow as its temperature rises.

Therefore, the factors that govern how much a solid object's volume changes include;

I. The object's temperature change.

II. The object's original volume

In the end, this suggests that when a solid item is heated, its atoms vibrate quickly around their fixed locations, increasing the volume of the thing.

In conclusion, all three (3) states of matter exhibit the scientific phenomena known as thermal expansion;

An object can heat up and its surrounds can cool down when heat is transmitted to it from its surroundings. When heat is converted to energy, it becomes part of the object's internal energy.

To know more about change in temperature, click on the link below:

https://brainly.com/question/20714323

#SPJ4

The pressure equilibrium constant expression for the decomposition reaction of sulfur trioxide (SO3) to form sulfur dioxide (SO2) and oxygen (O2) can be written as follows: Kp = (pSO2 * pO2) / pSO3

In this equation, pSO2 represents the partial pressure of sulfur dioxide, pO2 represents the partial pressure of oxygen, and pSO3 represents the partial pressure of sulfur trioxide. The pressure equilibrium constant, Kp, is a ratio of the partial pressures of the products (SO2 and O2) to the partial pressure of the reactant (SO3) at equilibrium. It provides information about the position of the equilibrium and the relative amounts of the substances involved.

To determine the value of Kp, you would need to measure the partial pressures of sulfur dioxide, oxygen, and sulfur trioxide at equilibrium. Then, you can substitute these values into the equation to calculate the Kp value. It's important to note that the Kp value for a reaction depends on the temperature at which the reaction occurs.

To know more about equilibrium visit:

brainly.com/question/20595436

#SPJ11

Answer:

With the cooler water at the bottom, this uneven temperature distribution creates convection currents that accelerate the cooling process. Even with more ground to cover to freeze, the temperature of the hotter water can drop at a faster rate than the cooler water.

Explanation:

Answer:

Ghawar field   location-Saudi Arabia

Burgan Field   location-Kuwait

Ahvaz field      location-Iran

Upper Zakum Oil Field   Location-Abu Dhabi UAE

Explanation:

I learned this yesterday :D

Answer:

Hạt nhân của nguyên tử X có điện tích là 30,4.10-19 culông. Tìm số p,e của nguyên tử X

Answer:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Explanation:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Answer:

to satisfy the law of conservation of matter.

the law of conservation states that matter can not be created nor destroyed.

Millerite has a relatively simple structure compared to other the nickel sulfide family, making it a good example for crystal lattice drawing.

Millerite is a mineral with a hexagonal crystal structure that belongs to the nickel sulfide family. The crystal lattice structure can be drawn by following these steps:Step 1: Draw a six-sided figure to represent the hexagonal crystal structure.Step 2: Draw parallel horizontal lines inside the six-sided figure, with the distance between them equal to the c-axis spacing.Step 3: Draw vertical lines that cross the horizontal lines at a 60-degree angle, forming a hexagonal lattice.Step 4: On each horizontal line, draw circles that represent the nickel sulfide ions, with the distance between them equal to the a-axis spacing.Step 5: Draw circles on the vertical lines that represent sulfur ions, with the distance between them equal to the c-axis spacing.Step 6: Connect the circles with lines to complete the crystal lattice structure of millerite.Some additional points that could be kept in mind are- The hexagonal prism is defined by the crystal lattice constants "a" and "c," which are the distances between the nickel sulfide ions in the hexagonal lattice.- The sulfur ions fill the interstitial sites between the nickel sulfide ions in the lattice.

for more questions on sulfide

https://brainly.com/question/28897023

#SPJ8

Answer:

Large Cargo Ship

Explanation:

Hope it helped!

The absolute error that could be expected when measuring the half-life of radon-220 is 0.416 s

The following data were obtained from the question:

We can obtaine the absolute error as illustrated below:

Percentage error = (Absolute error / Actaul measurement) × 100

0.8% = Absolute error / 52

0.008 = Absolute error / 52

Cross multiply

Absolute error = 0.008 ×52

Absolute error = 0.416 s

Thus, the absolute error in measuring the half-life is 0.416 s

Learn more about error:

https://brainly.com/question/24202332

#SPJ1

The majority of valleys are created by rivers or streams eroding the land's surface over a very lengthy period of time. Some valleys are created by glacial ice erosion.

Through erosion, or the removal of rock and sediment, glaciers can sculpt the terrain. Two alternative techniques can be used to erode bedrock: Abrasion: A glacier's bottom ice is not always pure; it frequently contains particles of rock, dirt, and debris. It is gritty, like to sandpaper.

Glaciers can alter the contour of the land when they spread out (grow) across its surface. They erode rock and sediment from the surface of the land, transport it from one location to another, and leave it in another. Thus, glaciers are responsible for both erosive and accumulative landforms.

Rock shards embedded in the ice abrade the underlying rocks, which is the main cause of glacial erosion.

To learn more about glacial ice erosion refer to:

https://brainly.com/question/8880387

#SPJ4

Answer:

b I see some of ask you to do it

Answer:

B. Detect the heat emitted by the lamps using infrared rays.

Explanation:

Giant molecules are also referred to as macromolecules and polymers when numerous molecules are combined. These atoms are arranged in a three-dimensional structure and are joined by covalent bonds.

A giant molecule, also known as a macromolecule, is a usually large molecule crucial to biophysical processes, such as a protein or nucleic acid. It is made up of many atoms that are covalently bound. Large non-polymeric molecules including lipids and macrocycles, as well as biopolymers, are the most prevalent macromolecules in biochemistry. In addition to synthetic fibers, giant molecules can also be found in research materials like carbon nanotubes.

Different experts use different terminology for giant molecules. For instance, in biology, giant molecules refer to the four immense molecules that make up living things, while in chemistry, it refers to aggregates of two or more molecules that are held together by intermolecular forces rather than covalent bonds yet that is difficult to dissolve apart. The term giant molecule is frequently referred to as high polymer in British English.

Learn more about giant molecule : https://brainly.com/question/13277913

Answer: B!!!

Explanation:

Answer:

vov-nhmb-snm

come here for study boy were not allowed girl are allowed i am also girl so come for study here we only study goo.gle meet

Answer:

The mass of iron shot is 28.3 grams.

Explanation:

Given that the initial volume of water is 47.5 mL and final volume of water containing iron shot is 51.1mL. First, you have to find the volume of iron shot by subtracting :

\(47.5 + iron \: shot = 51.1\)

\(iron \: shot = 51.1 - 47.5\)

\(iron \: shot = 3.6ml\)

Next, we have to apply density formula, D = mass/volume :

\(d = \frac{m}{v} \)

\(let \: d = 7.87,v = 3.6\)

\(7.87 = \frac{m}{3.6} \)

\(m = 7.87 \times 3.6\)

\(m = 28.3g \: (3sf)\)

Answer:

D.water

Explanation:

Petrified fossils form when minerals replace all or part of an organism. Water is full of dissolved minerals. It seeps through the layers of sediment to reach the dead organism. When the water evaporates, only the hardened minerals are left behind.

Answer:

The answer is

Explanation:

To find the density of the sphere we use the formula

To find the density in g/cm³ first convert the mass into grams and the volume into cm³

For the mass we have

155 lb = 70306.82 g

For the volume

4.2 ft³ = 118930.76 cm³

Substitute the values into the above formula

That's

We have the final answer as

Hope this helps you

almost every lab uses chemicals of some sort, chemical safety rules are a must. Following these policies helps employees avoid spills and other accidents, as well as damage to the environment outside of the lab.

Explanation:

We need to follow these because working in the laboratory is more dangerous and to avoid this we need to Know the precautions and dangers governing the lab to prevent accident

20,000 is the correct answer

What is empirical formula ?

The empirical formula of a chemical compound is the simplest ratio of the number of atoms of each element present in a compound. It represents the smallest whole number ratio of the elements in a compound and gives an indication of the relative proportions of the elements. The empirical formula is not necessarily the same as the molecular formula, which represents the actual number of atoms in a molecule. The molecular formula may be a multiple of the empirical formula and can be determined by analyzing the compound's molecular weight.

Multiply each by 20,000, then we have

C: 2.48925 x 20,000 = 49,785

H: 3.9901 x 20,000 = 79,802

O: 1.000 x 20,000 = 20,000

Multiply each element by in order to have them all reach the smallest whole number will be 20,000.

To know more about empirical formula , click the given link below ;

https://brainly.com/question/25705666

#SPJ1

Answer: The answer is 2

Explanation:

Answer:

Ammonia is a chemical compound used as a fertilizer because it is rich in nitrogen. Its chemical formula is NH3, which means that it consists of one atom of nitrogen and three atoms of hydrogen per molecule.

A chemical formula is a symbolic representation of a chemical compound. It tells us about the number of atoms present in the compound. The chemical formula of ammonia is NH₃.

An inorganic compound which is composed of nitrogen and hydrogen with the formula NH₃ is called the ammonia. It is a colourless gas with pungent smell. It is lighter than air and it can be easily liquified due to the strong hydrogen bonding between the molecules.

In ammonia there are 3 bond pairs and one lone pair around the central nitrogen atom. According to VSEPR theory, these tend to stay as far apart as possible to minimize mutual repulsion. Hence they arrange themselves in tetrahedral manner.

However due to the lone pair of electrons, the actual geometry of the molecule is trigonal pyramidal. One of the most important feature of ammonia is that it is a weak base.

Thus the chemical formula of ammonia is NH₃.

To know more about ammonia, visit;

https://brainly.com/question/1432685

#SPJ2

Molarity is a unit of concentration that expresses the number of moles of solute per liter of solution. To calculate the molarity of a solution made by diluting a concentrated solution, you can use the following formula:

Molarity = moles of solute / liters of solution

First, you have to calculate the number of moles of solute in the original solution, you can use the formula:

moles of solute = molarity x liters of solution

moles of solute = 18.0 M x 0.3 L = 5.4 moles

Then, you can use this value to calculate the molarity of the dilute solution:

Molarity of dilute solution = moles of solute / liters of solution

Molarity of dilute solution = 5.4 moles / 3.5 L = 1.54 M

So, the dilute solution has a molarity of 1.54 M.

Learn more about calculation the molarity of a solution here:

https://brainly.com/question/15802995

#SPJ4

The reactants, products and arrow pointing towards products are present in every chemical equation.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

Learn more about chemical equation,here:

https://brainly.com/question/28294176

#SPJ6

Answer:

The nucleus is surrounded by the endoplasmic reticulum, which is covered in spots by ribosomes.

Explanation:

When the animal cell divides, the nucleus breaks up, and the nuclear envelope falls apart.

0.6 g NaCl

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Balanced] Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq)

[Given] 0.5 g Na₂CO₃ reacted with excess CaCl₂

Step 2: Identify Conversions

[RxN] Na₂CO₃ → 2NaCl

Molar Mass of Na - 22.99 g/mol

Molar Mass of C - 12.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of Na₂CO₃ - 2(22.99) + 12.01 + 3(16.00) = 105.99 g/mol

Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol

Step 3: Stoichiometry

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

0.551373 g NaCl ≈ 0.6 g NaCl