PLS HELP! BRAINLIEST IF RIGHT WITH EXPLANATION :)

Answer:

2 NaBr + 1 Ca(OH)2 ---> 1 CaBr2 + 2 NaOH

Answer:

Increase in height from the ground.

Explanation:

Potential energy =mass×acceleration due to gravity×height.

P.E= mgh

Answer:

d = 0.5×10¹g/cm³

Explanation:

Given data:

Volume of material = 2 m³

Mass of material = 1×10⁴ Kg

Density of material = ?

Density:

Density is equal to the mass of substance divided by its volume.

Formula

d = m/v

Solution:

Volume of material = 2 m³

1 m³ = 1000000 cm³

2 ×10⁶cm³

Mass of material = 1×10⁴ Kg

1 Kg = 1000 g

1×10⁷ g

by putting values into density formula

d = 1×10⁷ g/2 ×10⁶cm³

d = 0.5×10⁷⁻⁶ g/cm³

d = 0.5×10¹g/cm³

Answer:

Ca

Explanation:

Ca is larger than Ca2+ because, in the periodic table, the atomic radius increases from top to bottom and from left to right. Also Ca has 2 more electrons than Ca2+ therefore, its atom is bigger because it has an extra shell.

Ca²⁺ is smaller than Ca. As Ca²⁺  has lost two electrons to become positively charged.

Ca²⁺ is the calcium ion, which has lost two electrons to become positively charged. When an atom loses electrons, it becomes smaller because there are fewer negatively charged electrons in the electron cloud to balance the positive charge of the nucleus.

On the other hand, Ca refers to the neutral calcium atom, which has an equal number of protons and electrons. In comparison to Ca²⁺, the neutral calcium atom has two additional electrons, which increases the electron cloud and overall size of the atom.

Therefore, Ca²⁺ is smaller than Ca.

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Answer: (F) chemical energy

Explanation:

Answer:

The total air pressure at the top of the highest peak in the world is 253.5 torr

Explanation:

The partial pressures of the gases present at the top of Mount Everest are;

Nitrogen, N₂ = 201.0 torr

Oxygen, O₂ = 50.0 torr

Argon, Ar = 2.0 torr

Carbon dioxide, CO₂ = 0.5 torr

By Dalton's law of partial pressure, the total pressure that a mixture of gases exerts is equal to the sum of the partial pressures of the individual gases

Mathematically, the law can be expressed as follows;

Total pressure, P = ∑P[tex]_i[/tex] = P₁ + P₂ + · · ·

From which we have;

The total air pressure at the top of the highest peak in the world, Mount Everest, [tex]P_{Total Mont Everest}[/tex] = The sum of the partial pressures of N₂, O₂, Ar, and CO₂

[tex]P_{Total Mont Everest}[/tex] = 201.0 torr + 50.0 torr + 2.0 torr + 0.5 torr = 253.5 torr

[tex]P_{Total Mont Everest}[/tex] = 253.5 torr = 0.33355263 atmosphere

Therefore, the total air pressure at the top of the highest peak in the world,  [tex]P_{Total Mont Everest}[/tex] = 253.5 torr

The total air pressure at the top of the highest peak in the world is 253.5 torr.

Dalton's law of gases states that total pressure of any mixture of gases is equal to the sum of the partial pressures of individual gases.

Given that,

Partial pressure of Nitrogen gas = 201 torr

Partial pressure of Oxygen gas = 50 torr

Partial pressure of Argon gas = 2 torr

Partial pressure of Carbon dioxide gas = 0.5 torr

Total pressure at the top = 201 + 50 + 2 + 0.5 = 253.5 torr

Hence total pressure is 253.5 torr.

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Answer:

Molecular formula = S₂O ₆

Explanation:

Given data:

Empirical formula = SO₃

Molecular formula = ?

Molecular mass = 152 g/mol

Solution:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass  = 80 g/mol

n = 152 g/mol / 80 g/mol

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2(SO₃)

Molecular formula = S₂O ₆

Answer:

a. 1

Explanation:

Radon is a member of group 18. It is an odorless heavy gas, that emanates from materials that contain uranium.

Rn is a decay product of 226-Ra, a member of the uranium decay series. The spontaneous  decay of Rn decay leads to the emission of an alpha particle.

Rn has a half-life of about 3.8 days and its decay product is 218Po.

The nuclear reaction which shows a spontaneous decay is Rn 21% Po + He.

Those reaction in which value of their enthalpy change and change in Gibb's free energy is negative, are spontaneous in nature.

Among all of the given reaction, only first reaction is spontaneous in nature because the given element Radon (Rn) is the product of the decay of uranium series. And in this reaction energy is emitted in the form of alpha particles.

Hence, option (1) is correct.

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Answer:

loss of mass

Explanation:

your welcome :)

Answer:

d. decomposition

Explanation:

decomposition reaction is a reaction in which a compound breaks down into 2 or more substances.

the general form is: AB → A + B

Answer:

A transition element atomic number 29 copper Cu

Explanation:

Answer:

so the third one

Explanation:

During the day, the sun heats up mountain air rapidly while the valley remains relatively cooler. Convection causes it to rise, causing a valley breeze. At night, the process is reversed. During the night the slopes get cooled and the dense air descends into the valley as the mountain wind.

Answer:

The Sun warms the tops of hills and mountains more than it does the valley.

Explanation:

Answer: I don’t know lol

Explanation:  I am so sorry I thought this was easy

Answer:

Ant.

Explanation:

The dog would be the most frantic, when all are compared at an equal speed of 30 mph. An ant of such strength, has six jointed legs and has an exoskeleton. An Ant of such size(mass) and weight would have take off with better traction too(6 legs). So the Ant would have the greatest kinetic energy. Also it would take turns while fleeing from the wildfire, while running at almost 30 mph while the other animals wouldn't come that close.

It is technically and literally illogical to say an ant can do 30 mph in its regular size.

Dont believe me? Watch ants scurrying away when threatened and taking turns and U-turns. Six legs offer more energy while fleeing by instinct. Literally six legs at 30 mph. Crazy!

Answer:hope it helps

Explanation:

Answer:

Option 2: temperature and volume

Explanation:

took the test

Temperature and volume are the variables for this piston.

Temperature is a measure of hotness or coldness

The volume of a gas is directly proportional to its absolute temperature. More specifically, for a fixed mass of gas at constant pressure, the volume (V) is directly proportional to the absolute temperature (T).

This is Charles' Law. V = kT, where k is a proportionality constant.

Hence, temperature and volume are the variables for this piston.

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Answer:

O my OMG

Explanation:

Remember Nicki vs. Cardi

Answer:

The highest energy level in which you would find electrons in a ground state chlorine atom is the third energy level.

Explanation:

The highest energy level in which you would find electrons in a ground state chlorine atom is the third energy level.

Answer:

Positive

Explanation:

If an atom has more protons than electrons, its charge with be positive. Protons have a positive charge, and electrons have a negative charge.

Answer:

Organ Movement Food Particles Broken Down

Stomach Upper muscle in stomach relaxes to let food enter, and lower muscle mixes food with digestive juice Proteins

Small intestine Peristalsis Starches, proteins, and carbohydrates

Pancreas None                    Carbohydrates, fats, and proteins

Liver         None                Fats

Explanation:

Answer: The freezing point of 3.46 gram of a compound X in 160 gram of benzene is [tex]4.38^0C[/tex]

Explanation:

The relation of density and molar mass is:

[tex]d=\frac{PM}{RT}[/tex]

where

d = density = 3.27 g/ L

P = pressure of the gas  = 773 torr = 1.02 atm   (760 torr = 1atm)

M = molar mass of the gas  = ?

T = temperature of the gas = [tex]116^0C=(116+273)K=389K[/tex]

R = gas constant  = [tex]0.0821Latm/Kmol[/tex]

[tex]M=\frac{dRT}{P}=\frac{3.27g/L\times 0.0821Latm/Kmol\times 389K}{1.02atm}=102.3g/mol[/tex]

The relation of depression in freezing point with molality:

[tex]\Delta T_f=k_f\times m[/tex]

[tex]\Delta T_f[/tex] = depression in freezing point = [tex]T_f^0-T_f[/tex] = [tex]5.45-T_f[/tex]

[tex]k_f[/tex] = freezing point constant  = 5.1

m = molality = [tex]\frac{\text {moles of X}}{\text {weight of solvent in kg}}=\frac{3.46\times 1000}{102.3\times 160}=0.21[/tex]

[tex]5.45-T_f=5.1\times 0.21[/tex]

[tex]T_f=4.38^0C[/tex]

Thus the freezing point of 3.46 gram of a compound X in 160 gram of benzene is [tex]4.38^0C[/tex]

From the information contained in the question, the freezing point of the solution is 4.38°C.

The molar mass of the compound can be obtained from;

M = dRT/P

Where;

d = Density of the gas = 3.27 gram/liter

R = molar constant =  0.082 atmL-K-1mol-1

T = Absolute temperature = 389 K

P = pressure = 773 torr or 1.02 atm

M = 3.27 gram/liter × 0.082 atmL-K-1mol-1 × 389 K/1.02 atm

M = 102.3 g/mol

Number of moles of X =  3.46 gram/102.3 g/mol = 0.034 moles

Molality of the solution = Number of moles of solute/ Mass of solution in kilograms = 0.034 moles/0.16 = 0.21 m

Using the relation;

ΔT = K m i

Where;

ΔT = Freezing point depression

K = Freezing constant = 5.1°C/m​

m = molality of solution = 0.21 m

i = Van't Hoff factor = 1

ΔT =  5.1°C/m​ × 0.21 m × 1

ΔT = 1.07 °C

But;

ΔT = Freezing point of pure solvent - Freezing point of solution

Freezing point of solution =  Freezing point of pure solvent - ΔT

Freezing point of pure solvent = 5.45°C

Freezing point of solution =   5.45°C - 1.07 °C

Freezing point of solution = 4.38°C

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Answer:

Mechanical Energy - The Physics Classroom

Objects have mechanical energy if they are in motion and/or if they are at some position relative to a zero potential energy position (for example, a brick held at a vertical position above the ground or zero height position). A moving car possesses mechanical energy due to its motion (kinetic energy).

Answer:

f2 4 answer. GG its right.

Explanation:

Answer:

hey the answer is in box f2 gg

Explanation:

The final temp : 538.2 K = 265.2 °C

Given

Temperature : 25 + 273 = 298 K

Initial Pressure = 98 kPa

Final pressure = 177 kPa

Required

The final temp

Solution

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

Input the value :

T₂=(P₂.T₁)/P₁

T₂=(177 x 298)/98

T₂=538.2 K

Answer:

Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus.

Answer:

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals

Explanation:

:) hope it helps! have a good day

Answer:

Blank 1:    4

Blank 2:    1

Blank 3:   2

Explanation:

The unbalanced reaction expression is given as:

      Na   +   O₂   →   Na₂O

Now, we use a mathematical approach to balance the reaction given above.

Assign coefficients a , b and c for the blanks:

          aNa   +   bO₂   →   cNa₂O

Conserving Na : a  = 2c

                   O:   2b = c

So, let c  = 1, a  = 2 and b = [tex]\frac{1}{2}[/tex]  

  Multiply through by 2;

          a  = 4,  b  = 1 and c = 2

                    4Na   +   O₂   →   2Na₂O

Blank 1:    4

Blank 2:    1

Blank 3:   2

Answer:

potassium nitrate

Explanation:

Answer:

Potassium Nitrate

Explanation:

Edge 2021

Answer:

the 4th one

Explanation:

2NACL 2NA + CL2

Answer:

It's B, the previous answer is wrong

Explanation: