A student carries out a flame test on an unknown solid. a red flame is seen. the student concludes that the solid is lithium carbonate. explain why this conclusion is not justified​

Answer:

Answer: The two types of fibres obtained from the fleece of a sheep are beard hair, which are coarse and fine, and soft under hair, which grow near the skin. The under hair are used to make wool.

Explanation:

mark brainly please!

(I didn't copy the person above me! I just realized we had the same answer.)

The relationship between level of economic development and environmental pollution is such that industrial emissions are directly proportional to the level of economic development.

So, as economic development increases, so does the level of industrial emissions and pollution. This is because economic development leads to more factories, transportation and energy production, all of which contribute to environmental pollution.

Learn more about level of economic development and environmental:

https://brainly.com/question/1711627

#SPJ4

This kind of matrix composite is renowned for strengthening the dispersive material's resistance to fracture. metals, ceramics, and polymers.

Ceramic matrix composites (CMC) are substances made of both ceramic and composite components.It consists of two parts: a matrix that holds the material together and a reinforcement that gives the material its tensile strength. When ceramic matrix composites have a scattered phase, it is primarily because the material's toughness has increased, which has increased the tensile strength.

To learn more about Ceramic matrix composites :

https://brainly.com/question/12974524

#SPJ4

Answer:

one from each parent

Explanation:

1. Examples of solids, liquids, and gases found in a home

Solids: books, furniture, toys

Liquids: water, juice, shampoo

Gases: air, natural gas, propane

2. The human body contains solids, liquids, and gases. Solids include bones, muscles, and organs. Liquids include blood, saliva, and urine. Gases include air in the lungs and dissolved gases in the bloodstream. The body is mostly made up of liquids, as they make up a large percentage of its overall volume.

3. If you needed to remove the water from a sample of blood to study the solids that remained, you could use a process such as evaporation or freeze-drying. Evaporation involves heating the sample to allow the water to evaporate, leaving behind the solids. Freeze-drying involves freezing the sample and then removing the water under vacuum, leaving behind a dry solid.

4. Some metals that could be found within the human body include iron, zinc, and copper. These metals are commonly found in foods such as meat, seafood, nuts, and whole grains. Other metals such as calcium, magnesium, and potassium are also important for the body and are found in a variety of foods.

To know more about solids here

https://brainly.com/question/21500863

#SPJ1

299.65 g Ti mass of ilmenite (in grams) is required if you wish to obtain 950 g of titanium.

The molar mass of ilmenite is 151.71 g mol1.

This indicates that each mole of ilmenite will weigh 151.71 g.

One mole of ilmenite will also include one mole of iron, 1Fe, one mole of titanium, 1Ti, and three moles of oxygen, 3O, as you can see by looking at the compound's chemical formula.

Since the molar mass of titanium is 47.857 g mol 1, 151.71 g of ilmenite will contain 47.857 g of titanium. It implies that 950.0 g of ilmenite will contain

= 950 * 47.857 / 151.71

= 299.65 g Ti

if you acquire 47.857 g of titanium for every g of ilmenite.

To know more about ilmenite, visit:

https://brainly.com/question/1615612

#SPJ1

To get 950 g of titanium, you need a mass of ilmenite containing 299.65 g of titanium.

Ilmenite has a molar mass of 151.71 g mol1.

This suggests that ilmenite will weigh 151.71 g per mole.

As can be seen from the chemical formula of the compound, one mole of ilmenite will also include one mole of iron, 1Fe, one mole of titanium, 1Ti, and three moles of oxygen, 3O.

151.71 g of ilmenite will contain 47.857 g of titanium since titanium has a molar mass of 47.857 g mol 1. According to the statement, 950.0 g of ilmenite will

= 950 * 47.857 / 151.71

= 299.65 g Ti

if each gram of ilmenite yields 47.857 grams of titanium.

To learn more about ilmenite:

brainly.com/question/1615612

#SPJ1

The opiate toxidrome of miosis and CNS depression, & hypoventilation is frequently followed in the clinical diagnosis of heroin intoxication. QT prolongation has been diagnosed.

The energy-producing process that powers the metabolic rates of most living organisms, respiration, depends heavily on oxygen. All living things, including humans, depend on the air that we breath to survive.

The oceans provide roughly a fifth of the oxygen on Earth, and marine life uses a similar proportion. Photosynthetic plankton are abundant in the ocean's top layer. They create more nitrogen than the biggest redwoods, yet being imperceptible to the sight.

To know more about oxygen visit:

https://brainly.com/question/16557891

#SPJ4

\(\\ \rm\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \rm\longmapsto Density=\dfrac{5000}{50}\)

\(\\ \rm\longmapsto Density=100g/cm^3\)

Answer:

c?

Explanation:

Answer:

b

Explanation:

Answer: D

Explanation: for question 2 the answer is D and for 3 it is A. That is very easy and the muscular systen has nothing to do with breathing.

Answer:

2: d

3: b

i think, im not too sure

Answer: 1.6441203 x 10 -13

I'm not so sure if this is right but I hope it helps.

The scientific notation is \(1.64412*10^3\)

Scientific notation exists as a way of expressing numbers that exist too large or too small to be conveniently written in decimal form. It may be directed to as scientific structure or standard index formation, or standard form in the United Kingdom.

Scientific notation exists as a method of writing very large or very small numbers. A number stands written in scientific notation when a numeral between 1 and 10 exists multiplied by a power of 10.

The following operation is performed

\(5.7365x10^-5 / 3.4891x10^-8\)

\(=1.64412*10^3\)

The scientific notation of the answer is\(1.64412*10^3\)

To learn more about scientific notation refer to:

https://brainly.com/question/1767229

#SPJ2

The correct definition of vapor is: "B. A substance that is in the gas phase at a temperature at which it would normally be a solid or liquid."

A vapor is a substance that exists as a gas at a temperature that is typically associated with solids or liquids.

Unlike gases, which can exist at a wide range of temperatures, vapors specifically refer to substances that have transitioned into the gas phase despite their expected solid or liquid state under normal conditions.

This transition usually occurs due to increased temperature, causing the substance to evaporate or sublimate.

Learn more about vapor on:

https://brainly.com/question/2693029

#SPJ1

The periodic table of elements has vertical groups that tell you the number of electrons and horizontal periods that tell you the number of valance shells. The chemical elements are arranged in the periodic table according to their atomic numbers, starting with hydrogen, which has the lowest atomic number, and moving up to uranium, which has the greatest atomic number.

Due to their comparable chemical behavior, the periodic table's vertical columns are referred to as groups or families. The number of valence electrons and chemical characteristics is the same for all members of a family of elements. Periods refer to the horizontal rows on the periodic table.

The contemporary periodic table has 18 vertical columns and 7 horizontal periods.

To know more about periodic table, visit;

https://brainly.com/question/29766008

#SPJ1

Answer:

A higher melting point than rubidium

Explanation:

Since Caesium has very strong bond btwn atoms hence requires high energy to break causing it to have a high melting point than rubidium

Answer:

Caesium would have a lower than Rubidium.

Explanation:

The reason is the periodic order.

Answer:

This is required answer.

Explanation:

Given that,

The neutralization reaction between methylamine and acetic acid

We know that,

According to proton theory of acid and base,

An acid is a substance which denotes the hydrogen as proton.

Base is a substance which accept the proton.

We need to draw curved arrows to indicate the direction of electron flow

According to diagram,

Diagram shows the movement of electrons in this step of the mechanism.

Hence, This is required answer.

The first ionization energy represents Option C.  the energy required to remove an electron from an atom.

The ionization energy is defined as the energy required to remove an electron from a gaseous atom or ion to form a cation that carries a charge of +1.Ionization energy is an essential property of an element, and it is determined by the effective nuclear charge (Zeff) and the distance between the valence electrons and the nucleus. The effective nuclear charge is the positive charge that an electron experiences from the nucleus.

The closer the valence electrons are to the nucleus, the greater the effective nuclear charge, making it more challenging to remove an electron from the atom. The ionization energy increases from left to right and from bottom to top across the periodic table. The ionization energy decreases from top to bottom and from right to left across the periodic table. The reason for this trend is the increase in atomic radius and the decrease in effective nuclear charge from top to bottom and from right to left on the periodic table.

Ionization energy plays a significant role in chemical reactions, particularly in redox reactions. The energy required to remove an electron from an atom or ion is equivalent to the energy released when the ion or atom gains an electron. A high ionization energy indicates that the atom is less reactive and more stable since it requires a lot of energy to remove an electron. Therefore the correct option is C

Know more about ionization energy  here:

https://brainly.com/question/20658080

#SPJ8

From the question, we will need to assume the temperature don't change.

In this case, assuming the gas behaves as an ideal gas, we can use the Boyle's Law to answer.

The Boyle's Law says that the product of the pressure and volume of an ideal gas, at constant temperature, is a constant:

But the volume and pressure have to be on the same unit.

First, lets convert the final pressure of 2.50 atm to kPa. We can do that by multiplying the atm value by 101.325:

Now, we can apply the Boyle's Law:

So, its volume will be approximately 1.48 L.

Answer:

holaholaholaholaholaholaholahola

The volume occupied by the oxygen gas at a pressure of 210 kPa and a temperature of 50°C is 0.126 liters, rounded to three significant figures.

To calculate the volume occupied by the oxygen gas at a pressure of 210 kPa and a temperature of 50°C, we can use the ideal gas law equation:

PV = nRT

where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

First, we need to convert the given temperature from Celsius to Kelvin by adding 273.15:

T = 50°C + 273.15 = 323.15 K

Next, we rearrange the ideal gas law equation to solve for volume:

V = (nRT) / P

To find the number of moles (n), we can use the answer from question 27, which is the mass of oxygen gas:

m = 32 g

Using the molar mass of oxygen (O₂) which is approximately 32 g/mol, we can calculate the number of moles:

n = m / M = 32 g / 32 g/mol = 1 mol

Now we have all the values needed to calculate the volume:

V = (1 mol * 8.314 J/(mol*K) * 323.15 K) / 210,000 Pa

Using the ideal gas constant (R) of 8.314 J/(mol*K) and the pressure of 210 kPa (which is equivalent to 210,000 Pa), we can substitute these values into the equation and solve for volume.

V = 0.126 liters.

For more such questions on volume visit:

https://brainly.com/question/29796637

#SPJ8

Answer:

The molecular formula for sulfur hexafluoride is SF6 S F 6 , in which there is 1 sulfur atom and 6 fluorine atoms.

Explanation:

hope this helps

Answer:

C.) That all matter was composed of earth, fire, water and air

Explanation:

Just took the test

Answer:

... r ra to to isis bty is hdig

Q=mcΔt

Δt=Q/mc

t-24.2 = 950/(750.1 x 4.184)

t=24.5 °c

The volume of copper (II) sulfate in a container is equivalent to 0.650L.

Volume is the three-dimensional measure of space that comprises a length, a width and a height. It is measured in units of cubic centimeters (cm³) in metric, cubic inches or cubic feet in English measurement.

According to this question, a container seems to have about 650 mL of copper(II) sulfate solution in volume. The volume can be converted to litres as follows:

1 millilitre = 0.001 litre

650 millilitres = 0.650 litres

Therefore, 0.650L is the volume of copper II sulfate in litres.

Learn more about volume at: https://brainly.com/question/13666409

#SPJ1

Answer:

D. Thermal energy increases as the atoms and molecules in a system move more.

Explanation:

Thermal energy is a form of kinetic energy possessed by molecules of a system. The measure of this kinetic energy in an atom is called heat.

The average kinetic energy of a system is the temperature.

Answer:

its a gas

Explanation:

Hydrogen  is the chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, non-metallic, univalent, highly flammable diatomic gas. Hydrogen is the lightest and most abundant element in the universe.

In the given question, the state of matter of Hydrogen is gas in nature.

A state of matter is one of the four distinct forms in which matter can exist as solid, liquid, gas, and plasma.

Hydrogen is a chemical element that occurs naturally as a gas at standard temperature and pressure (STP). It is the lightest and most abundant element in the universe and is found in stars, gas giants, and other celestial bodies.

It is also used in various industrial processes, such as the production of ammonia and methanol, and as a fuel source in fuel cells.

Therefore, hydrogen is in the gaseous state at room temperature and normal atmospheric pressure.

Learn more about State of matter here:

https://brainly.com/question/9402776

#SPJ6

Explanation:

First, we need to transform 60g of SiO2 and 60 g of C into moles.

For this, we will use the following fomula: n=m/MM

MM of SiO2 = 60 g/mol

MM of C = 12 g/mol

SiO2 :

n = 60/60 = 1 mol

C:

n = 60/12 = 5 mol

The equation tells us that:

SiO2(s) + 3C(s) —-> SiC(s) + 2CO(g)

1 mole of SiO2 reacts with 3 moles of C. It means that the limiting reactant in this case is SiO2, because we have excess of C (we have 2 moles more).

Answer: D) SiO2.

Answer:

Dipole induced dipole force of attraction.

Explanation:

This is because dipole induced dipole attraction is a weak force of attraction or london force that occur when a polar molecule causes a form induction in a dipole in an atom or in a nonpolar molecule by altering the arrangement non polar electrons.

Answer:

1g/mL is the correct answer

The final volume V₂=4.962 L

Given

T₁=20 + 273 = 293 K

P₁= 1 atm

V₁ = 4 L

T₂=100+273 = 373 K

P₂=780 torr=1,02632 atm

Required

The final volume

Solution

Combined gas law :

P₁V₁/T₁=P₂V₂/T₂

Input the value :

V₂=(P₁V₁T₂)/(P₂T₁)

V₂=(1 x 4 x 373)/(1.02632 x 293)

V₂=4.962 L

Chemical symbol Sg is for seaborgium with atomic number 106 and  atomic mass 269 u while element with atomic number 118 is oganesson  with symbol Og and atomic mass 294 u, neodymium has symbol Nd with atomic number 60 and atomic mass 144.24 u.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

Learn more about element,here:

https://brainly.com/question/13794764

#SPJ1

Answer:

Bond cleavage, or bond fission, is the splitting of chemical bonds. This can be generally referred to as dissociation when a molecule is cleaved into two or more fragments. In general, there are two classifications for bond cleavage: homolytic and heterolytic, depending on the nature of the process. ... The singlet excitation energy of a silicon–silicon sigma bond is lower than.