a b c or d ..........​

Answer:

Thegas should be cooled to -136.5°C.

Explanation:

Volume of a gas is directly proportional to its temperature on the kelvin scale. This is called Charles' law.

Initially, the gas had a volume of 3.0 L at 0°C(273 K).

We have to have the temperature at which the volume of the gas will be 1.5 L.

Let V1=3 L, T1=273 K, V2=1.5 L, T2=?

By Charles' law,

V1/T1=V2/T2

T2

=(V2×T1)/V1

=(1.5 L×273K)/3L

=136.5 K

=(136.5-273)°C

= -136.5 °C

Answer:

F₂ (g) + FeI₂ (aq) →  FeF₂ (aq) +  I₂ (l)

Explanation:

Our reactants are:

F₂ → Fluorine gas, a dyatomic molecule

FeI₂ → Iron (II) iodine

Our products are:

I₂ → Iodine

FeF₂ → Iron (II) fluoride

Then, the reaction is:

F₂ (g) + FeI₂ (aq) →  FeF₂ (aq) +  I₂ (l)

We see it is completely balanced.

Answer:

18. E. 0%

19. D. 25%

Explanation:

Question 18:

Let's use "B" to represent the dominant allele of "light blue skin", and

"b" for recessive "light green skin".

Squidward => BB - light blue skin

Squidward's bride => bb - light green skin

When they cross, they will have the following offsprings:

(BB) × (bb) - Parent

(Bb) (Bb) (Bb) (Bb) - Offspring

All the offspring would be light green skin. The dominant allele of light green skin will express itself over the recessive allele.

Therefore, the chances of Squidward and his bride having light green skin is 0%

Question 19:

Squidward's son => Bb - light blue skin

Squidward's son's bride => Bb - light blue skin

(Bb) × (Bb) - parent

(BB) (Bb) (Bb) (bb) - offspring

They will have the following offspring:

BB and Bb - light blue - 75%

bb - light green - 25%

Chance of having offspring with light green skin is 25%

Answer:

Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).

Explanation:

Answer:

Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help

Balance the amount of water in your body

Balance your body's acid/base (pH) level

Move nutrients into your cells

Move wastes out of your cells

Make sure that your nerves, muscles, the heart, and the brain work the way they should

Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.

The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.

Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.

Answer:

A

Explanation:

Have a nice day

Answer: f=ma

Explanation:

Answer:

diffusion

Explanation:

plants have stomata at the bottom of their leaves. these allow for CO2 to diffuse in and out of the plant.

Answer:

P³⁻ + Cl⁻ --> PCl₃

Explanation:

PCl₃: phosphorus trichloride. prefix in front of chloride is "tri"–meaning three.

Answer:

phosphorus + chlorine = phosphorus trichloride

(He asked for word equation)

Answer:

YES that is the molar mass can be found as the atomic mass of a single atom, BUT when you get to larger molecules your molar mass will be a combination of atomic masses.

Explanation:

Answer: Metals

Explanation:

When an atom accepts an electron negative charge is created on atom and is called as anion.

When atom loses an electron positive charge is created on atom and is called as cation.

The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Thus metals form cations.

Answer:

no

Explanation:

because

Answer:

the first answer will be for A. 35 and second B. 47 then second no t dude

Answer:

Explanation:

Hi I'm so sorry hope you have a good day

Answer:

Spot (4)  Has evidence that there were waves here at some point. It looks as if the sand/surface debris was moved back and forth, creating this pattern in the sand. Spots (5) and (7) show evidence of water erosion. The smooth edges of both hills mean that water once flowed through that area, carrying little pebbles and rocks that gradually shaped and smoothed those mounds. An example for this would be how there are smooth areas in the Grand Canyon where scientists have concluded that some, if not all, of the Grand Canyon was formed by flowing water. "Rapid uplift, cracking, and surface drainage of receding floodwaters provide both the path and the necessary volume of water to quickly carve out Grand Canyon," says scholars on icr.org.

Explanation:

Water Erosion exists.

766.7856 g

Molecular weight of Aluminium Nitrate is 212.996 g/mol. 3.6 moles of Aluminium Nitrate is: 212.996 × 3.6 = 766.7856

Explanation:

Word Equation

Lead Nitrate + Sodium Chloride --> Lead Chloride + Sodium Nitrate

Balanced Chemical Equation

2 NaCl (aq) + Pb(NO3)2 (aq) → PbCl2 (s) + 2 NaNO3 (aq)

Ionic Equation

In an ionic equation, the aqueous species in the reaction are broken up into ions.

2Na⁺ + 2Cl⁻  + Pb²⁺  + 2NO₃⁻  → PbCl2 (s)  + 2Na⁺ +  2NO₃⁻

The three ways in which travelers should be considerate when using public transport include the following:

This is the type of transport which is available to the general public such as trains, buses etc.

It is best to be considerate when using it by applying the following methods mentioned above to prevent disturbance and conflict.

Read more about Public transport here https://brainly.com/question/1299303

Answer:

Explanation:

50 is the volume

Answer: 1.95 mol/l

Explanation: molarity = concentration = amount of substance/volume.

Also v = n/V= 1.71 mol/ 0.875 litres= 1.9542857 mol/l

Answer:

See explanation

Explanation:

The law of conservation of matter states that "matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same."(Virginia)

Hence, the quantity of matter present before and after the candle burn must remain the same in accordance with this law stated above.

Hence, my friend was not correct.

Answer:

The limiting reactant is H₂

Explanation:

The reaction of hydrogen (H₂) and carbon monoxide (CO) to produce methanol (CH₃OH) is the following:

2H₂(g) + CO(g) → CH₃OH(g)

From the balanced chemical equation, we can see that 1 mol of CO reacts wIth 2 moles of H₂. So, the stoichiometric ratio is:

2 mol H₂/1 mol CO = 2.0

We have 500 mol of CO and 750 mol of H₂, so we calculate the ratio to establish a comparison:

750 mol H₂/500 mol CO = 1.5

Since 2.0 > 1.5, we have fewer moles of H₂ than are needed to completely react with 500 moles of CO. In fact, we need 1000 moles of H₂ and we have 750 moles. So, the limiting reactant is H₂.

Answer:

B. X represents phosphorus

Explanation:

In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.

Answer:

5. a

Explanation:

Al+3FeO—> 3Fe+   Al2O3

                    3.60—>3.60÷3=1.20 (mol)

Answer:

All of the elements in a period have the same number of atomic orbitals.

Explanation:

Answer:

See explanation

Explanation:

We first obtain the mole fraction of propane at the start and end;

0.01 = x/0.62 + 0.28 + x

0.01[0.62 + 0.28 + x] = x

0.01[0.9 + x] =x

9 * 10^-3 + 0.0.1x = x

9 * 10^-3 = x - 0.0.1x

9 * 10^-3 = 0.99x

x = 9 * 10^-3/0.99

x = 9.09 * 10^-3

After

For methane

0.62/ 0.28 + 0.62 + 9.09 * 10^-3     = 0.68

For ethane

0.28/0.28 + 0.62 + 9.09 * 10^-3       =0.31

Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa

Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa

Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa

Answer: ummm what is this cause I don't get it either

Explanation:

i need help with this to lol

Answer:

Hey this is your answer 59.05.

Explanation:

C) $18.06 \times {10^{23}}$ D) $24.08 \times {10^{23}}$ Hint: In order to find the number of atoms in 48 g of Mg, use the formula which relates the number of particles/atoms with the Avogadro number and number of moles of the substance and this required formula is: number of atoms = number of moles × Avogadro's number.

Please can I have brainliest :]