Anyone know this question

Answer:

[tex]0.5\: moles\: occupies \: 1 \: litre \\ 4.9 \: moles \: will \: occupy \: ( \frac{4.9}{0.5} ) \: moles \\ = 9.8 \: litres[/tex]

Answer:

a. 0.14 M

Explanation:

Molarity is the molar concentration of a solution and can be calculated using the formula below:

Molarity (mol/L) = number of moles (lol) ÷ volume (L)

To convert the mass of CO2 to moles, we use the formula: mole = mass/molar mass.

Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

mole = 2.2/44

mole = 0.05mol

Volume of can = 335mL = 335/1000 = 0.335L

Molarity = n/V

Molarity = 0.05/0.335

Molarity = 0.149

Molarity = 0.14 mol/L or M

The question is incomplete, the complete question is;

Arrange the following ionic compounds in order of decreasing amount of energy released in lattice formation: NaF, MgS, TlN, and CsI.

Answer:

TlN> MgS > NaF > CsI

Explanation:

Recall that lattice energy is the energy evolved when a crystal lattice is formed from its component ions.

The lattice energy depends on the size of the ions. The smaller the sizes of the ions, the larger the lattice energy.

The order of energy released in lattice formation for these compounds is;

TlN> MgS > NaF > CsI

Answer:

A the boiling point to increase

Explanation:

That is a colligative property

it is not table salt

Explanation:

Table salt dissolves in water.

Answer:

9.0 moles of CaO

Explanation:

We have the reaction equation as follows;

Fe2O3 + Ca3(PO4)2 -------> 2FePO4 + 3CaO

Now we know from the equation that;

1 mole of iron III oxide yields 3 moles of CaO

Therefore;

3 moles of iron III oxide yields 3 * 3/1

= 9.0 moles of CaO

Answer:

34.92 grams NaCl (in 1 L of solution)

Explanation:

The chemical formula of sodium chloride is NaCl. From the formula, we can calculate the molar mass of NaCl:

MM(NaCl)= MM(Na) + MM(Cl) = 23 g/mol + 35.4 g/mol = 58.4 g/mol

A solution of NaCl with a molarity of 0.598 M has 0.598 moles of NaCl per liter of solution. So, we multiply the moles by the molar mass of NaCl to calculate the mass we need:

mass of NaCl = 0.598 mol x 58.4 g/mol = 34.92 g NaCl

Therefore, we need 34.92 grams of NaCl to prepare 1 liter of a solution with a molarity of 0.598 M.

Answer:

Some human activities that contribute to climate change would be fracking, driving vehicles, deforestation, and developing cities. Fracking releases methane and other greenhouses gases into the atmosphere. Driving vehicles, like cars or trains, also releases carbon dioxide into the atmosphere. Deforestation decreases the amount of oxygen being produced. Developing cities also contributes because it consumes almost 80% of the world's energy, as well as producing 60% of the greenhouse gases.

Answer: 2.86 inches

Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

Answer:

2.86 inches

Explanation:

Answer:

380

Explanation:

Q=mco

Q is the energy

M is mass

C is specific heat

O is increased in temperature

Answer:

Not really sure, buts its either B or C.

Answer:

(C) 180.0 g of C6H12O6 dissolved in 500.0 mL of solution

Explanation:

Molarity is mole/volume.

1. Find the mass of C6H12O6 in 1 Liter of 2.0 solution

(2 mol C6H12O6 / L) * (180 g / mol C6H12O6) = 360 g C6H12O6

There are 360 g C6H12O6 in 1000 mL of solution

2. Compare the value you found in step 1 to each of the multiple choice answers.

180.0 g of C6H12O6 dissolved in 500.0 mL of solution is exactly proportional to 360 g C6H12O6 in 1000 mL of solution.

The preparation which produces a 2.0 M solution of C₆H₁₂O₆ is 180.0 g of C₆H₁₂O₆ dissolved in 500.0 mL of solution.

Molarity is defined as the number of moles of solute present in per liter of solution.

Moles of any substance will be calculated as :

n = W/M, where

W = given mass

M = molar mass

In the question given that molar mass of C₆H₁₂O₆ is 180 g/mole, and let we have produced the solution of 2 molarity by these amount in 1 liter i.e.

2 = n/1

n = 2 moles

Now by using these moles we can calculate the required mass of C₆H₁₂O₆ as:
2 = W/180

W = 360g

From this it is clear that for the preparation of 1 liter of solution of 2 molarity 360g of C₆H₁₂O₆ is required. So in 500mL of solution, 180 g of C₆H₁₂O₆ will use.

Hence, option (C) is correct i.e. 180.0 g of C₆H₁₂O₆ dissolved in 500.0 mL of solution.

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Answer:

One way an animal may adapt to the environment and change characteristics is for example lizards. Lizards are preyed on by birds and other small mammmals. To avoid this some lizards have adapted to color changes or camofaluge.

Explanation:

Answer:

take a octopus for example, they change thw color of their skin to match their environment to stay hidden.

Explanation:

or take a decomposing plant for example, they mimik the process of decomposing to draw animals away

Answer:

E_a = 103.626 × 10³ KJ/mol

Explanation:

Formula to solve this is given by;

Log(k2/k1) = (E_a/2.303R)((1/T1) - (1/T2))

Where;

k2 is rate constant at second temperature

k1 is rate constant at first temperature

R is universal gas constant

T1 is first temperature

T2 is second temperature

We are given;

k1 = 2.8 × 10^(-3) /s

k2 = 4.8 × 10^(-4) /s

R = 8.314 J/mol.k

T1 = 60°C = 333.15 K

T2 = 45°C = 318.15 K

Thus;

Log((4.8 × 10^(-4))/(2.8 × 10^(-3))) = (E_a/(2.303 × 8.314))((1/333.15) - (1/318.15))

We now have;

-0.76592 = -0.00000739121E_a

E_a = -0.76592/-0.00000739121

E_a = 103.626 × 10³ KJ/mol

I believe the answer is number 1 but I could be wrong ><

Water is a substance composed of hydrogen and oxygen and exists in solid, liquid and gaseous state in nature.

Hydrogen is "a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements".

Oxygen is "a non-metallic chemical element of Group 16 (VIa) of the periodic table".

Solid is a state of matter in which atoms or molecules are tightly packed.

Liquid is a state of matter in which atoms are held loosely and are free to flow.

Gas is a state of matter which has no fixed shape and volume.

Hence, water exists in three states of matter.

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Answer:

Explanation:

Fridge magnets are made of weakly ferromagnetic ceramics like barium ferrite or strontium ferrite. The magnetic field created by the fridge magnet aligns the spins of unpaired electrons in metal atoms in the fridge in such a way that the magnet and the fridge door are attracted to each other; this force keeps the magnet stuck to the fridge.

Answer:

the fridge is a magnet

Explanation:

magnets connect to fridge

Answer:

A. 20.866%

Explanation:

First, we calculate molar mass of Li3PO3

Molar mass of Li3PO3 = 6.9 (3) + 31 + 16(3)

= 20.7 + 31 + 48

= 99.7g/mol

To calculate the percent composition of Lithium, we say:

Mass of lithium in compound/mass of compound × 100

% composition = 20.7/99.7 × 100

= 0.208 × 100

= 20.8%.

Answer:

Percent yield = 65.2 %

Explanation:

The reaction determines this:

2 moles of Al react to 3 moles of chlorine gas in order to produce 2 mol of aluminum chloride.

We determine the moles of chlorine:

52 g . 1mol /70.9g = 0.733 moles of Cl₂

3 moles of gas can produce 2 moles of salt

Then, our 0.733 moles may produce (0.733 . 2) / 3 = 0.489 moles of AlCl₃

We convert moles to mass to predict the 100 % yield

0.489 mol . 133.3 g /mol = 65.19 g

Percent yield = (Yield produced / 100 % yield) . 100

Percent yield = (42.5 g / 65.19g) . 100 = 65.2 %

Answer:

this is your answer.....

Answer:

the addition to solute decreases the solvent's vapor pressure. a temperature must then be applied to overcome the change

Explanation:

Answer:

long story short: A

Explanation:

Answer:

Lungworms live in the lungs of bighorn sheep causing them to be sick, or even die.

Explanation:

hope this helps

pls mark me brainliest

Answer:

5.3586262014272155

Explanation:

You have to go from grams --> moles --> molecules. You can find the equation online.

First you have to find the molar mass of AlF3 which is 83.98 g/mol.

To convert it to moles you simply

450.0 grams × [tex]\frac{1 mol}{83.98 grams}[/tex] = 5.358 mol

To convert mol to molecules: (multiply by Avogadros # = 6.022*10^23)

5.358 mol × [tex]\frac{6.022*10^2^3}{1mol}[/tex] = [tex]3.23 *10^{24}[/tex]

Answer:

The correct answer is - Pine tree.

Explanation:

Coniferous trees or cone-bearing trees normally called conifers adapted their leaves and have needles like leaves that retain more water. Needles do not appear to be leaves but are modified leaves.

Conifer trees adapt this leaf modification to prevent water loss due to transpiration in the case of dry air or atmosphere. Important members of the conifer trees are pine trees, cedars, spruces, and Pines.

Answer:

Living things can have a minimum of one cell

Explanation:

Living things can have a minimum of one cell; these are called unicellular organisms. Some examples of unicellular organisms: bacteria, algae (plants), some fungi, and protozoa

hope this helps!

In an ecosystem ,cell is the minimum amount of material that must be present in a living organism.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

Explanation:

if this helped you should mark this the brainliest answer also you should join a meeting if you like it would be fun

Answer:

physical change is reversible but chemical change is irreveesable4

Answer:

No. If you were to set up what the friend said it would look like this:

19.7g × [tex]\frac{grams}{moles}[/tex] ==>  [tex]\frac{19.7 grams}{1}[/tex] ×

The above does not look right because the grams do not cancel out. If it's not cancelled, it would be included in your final answer, but you're looking for moles not grams.

When setting up a stoichiometry equation, you have to put the same unit of measurement (ex- grams, cm, mm, etc.) on the numerator of one side and the denominator of the other side.

This would cancel out the unit.

For example: If you wanted to find out how much of 320 cm are in a meter.

*there are 100 cm in 1 meter*

(1. always start with the given number!)

(2. set up the next fraction where you can cancel out cm)

[tex]\frac{320cm}{1}[/tex] × [tex]\frac{1 meter}{100 cm}[/tex] = 3.2 m

Going back, your friend would have to switch the units from grams/moles to moles/grams. It would cancel out grams, which would leave moles. Therefore, moles will be included in your final answer.

[tex]\frac{19.7 grams}{1}[/tex] × [tex]\frac{moles}{grams}[/tex] = _?_ moles

You will take the ratio of mass and molar mass. Hence my friend is wrong.

The formula for calculating the number of moles is expressed as:

[tex]Moles=\frac{mass}{molar mass}[/tex]

Given the following

Mass = 19.7 grams

Since the molar mass is measured in gram per mole, hence to get the number of moles, you will take the ratio of mass and molar mass. Hence my friend is wrong.

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Explanation:

[tex]PV = nRT \\ (200000 \times 3.5 \times {10}^{ - 6} ) = n \times 8.314 \times 300 \\ n = \frac{0.07}{2494.2 } \\ n = 2.81 \times {10}^{ - 5} [/tex]

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Answer:

Have anyone found the answer to this? I’m on this grade result course right now

Explanation:

The concentration of a potassium manganate(VII) solution (KMnO4) is 10 g /L. What is the concentration of this solution in molarity is 0.06 M.

The ratio of number of moles of solute to the volume of the solution in litre is called molarity. it is denoted by symbol M.

Given concentration (C) of potassium manganate(VII) solution in g/L is 10 g /L

Molarity = C/molar mass of KMnO4 = 10g/L ÷ 158.02g/mol = 0.06 mol/L

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Answer:

I tried my best lol, but here's what I put. I hope this helped a bit

The graph of the voltage on the x-axis and the average number of paper clips picked up by the electromagnet on the y-axis is shown in the picture attached.

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

It usually consist of wire wound into a coil. When current is passed through the wire a magnetic field is created which is concentrated in the hole, denoting the center of the coil.

The Battery voltage was plotted on the x axis and the average paper clips picked up by 25 turn electromagnet and 50 turn electromagnet was plotted on y axis and the following graph was obtained.

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