Beryllium magnesium and calcium all are located in the alkaline earth group which of these characteristics do these elements have in common?

Answer:

Malleable

Explanation:

Answer: option D. CO2 and SO2

Explanation:

Answer:the volume will be 2.15L

Explanation:

V1 = 2.35L

V2 =?

T1 = 20°C = 20 +273 = 293k

T2 = - 5°C = - 5 + 273 = 268k

V1 /T1 = V2 /T2

2.35 /293 = V2 /268

V2 = (2.35 / 293) x 268

V2 = 2.15L

Answer:

60

Explanation:

60

Answer:

1 mol of C2H6 contains 6.023 x 10^23 molecules and each molecule e of ethane contain 2 carbon atoms . so to tal no. of carbon atoms = 2 X 6X 10^23

Explanation:

Answer:

4

Explanation:

I took the test and got it right!

Answer:

c

Explanation:

gradpoint

Answer:

pour out some of the solution from the beaker

Answer:

The answer is letter A, are in constant random motion.

Explanation:

"Kinetic Molecular Theory of Gases" shows the behavior of gases in relation to heat and temperature (thermodynamics). "Kinetic" means motion, thus it is very normal to say that the theory is about the motion of gas particles.

When it comes to "ideal gases" (gases which obey the gas law), the gas is made of of molecules or atoms, which are very small particles. These have the same amount of mass and are constantly colliding in a rapid motion. However, their collisions are "elastic," which means that, there is "no net conversion" of the molecules' or atoms' kinetic energy. This means that the "total kinetic energy "is the same or stable, but is dependent on the temperature.

Remember that the gas particles in one sample have varying speed, which means that their kinetic energy are not the same.

Answer:

392

Explanation:

According to the law of conservation of energy, energy cannot vanish,so the lost potential energy must be converted into another form of energy (in this case, Kinetic Energy).

(mass*g*height)-(mass*g*halfway height)=(2*9.8*40)-(2*9.8*20)

784-392=392

This makes sense because since the rock has fallen halfway, half of its potential energy has become kinetic energy. Once the rock reaches a height of 0 Meter, all of its potential energy will be kinetic energy.

Answer:

Empirical formula is CCl₄

Explanation:

Given data:

Percentage of carbon = 7.70%

Percentage of chlorine = 92.3%

Empirical formula = ?

Solution:

Number of gram atoms of Cl = 92.3 / 35.5 = 2.6

Number of gram atoms of C = 7.70 / 12 = 0.64

Atomic ratio:

            C                      :              Cl            

           0.64/0.64        :             2.6/0.64

            1                      :                4        

C : Cl  = 1 : 4

Empirical formula is CCl₄.

The empirical formula for the compound that is 7.70% carbon and 92.3% chlorine is [tex]{CCl_4}[/tex].

The empirical formula of a compound represents the smallest whole-number ratio of atoms present in a molecule. To find the empirical formula for a compound given the percentage composition, follow these steps:

1. Assume a 100 g sample of the compound. The percentages given are then directly equal to the mass of each element in grams.

2. Convert the mass of each element to moles using the molar mass of each element.

3. Divide the moles of each element by the smallest number of moles obtained to find the mole ratio.

4. If necessary, multiply the mole ratio by the smallest whole number to get whole numbers, which will give the empirical formula.

Let's apply these steps to the given problem:

1. For a 100 g sample of the compound, we have:

 - Carbon (C): 7.70 g

 - Chlorine (Cl): 92.30 g

2. Convert the mass of each element to moles:

 - Moles of C = mass of C / molar mass of C = 7.70 g / 12.01 g/mol = 0.641 mol

 - Moles of Cl = mass of Cl / molar mass of Cl = 92.30 g / 35.45 g/mol= 2.603 mol

3. Find the mole ratio by dividing by the smallest number of moles:

 - Mole ratio of C = 0.641 mol / 0.641 mol = 1

 - Mole ratio of Cl = 2.603 mol / 0.641 mol = 4

4. The mole ratio is C:Cl = 1:4. Therefore, the empirical formula of the compound is CCl4

The empirical formula for the compound that is 7.70% carbon and 92.3% chlorine is [tex]{CCl_4}[/tex].

The complete question is:

What is the empirical formula for a compound that is 7.70% carbon and 92.3% chlorine?

The volume of the helium gas will be 11.2L when the pressure increases to 2.00 atm and the volume of the neon gas syringe will be 2.24L at STP. After adding 0.10 mol of argon gas to the syringe, keeping pressure and temperature constant, the volume will increase to 4.48 L.

The student is asking about the behavior of gases under different conditions and these questions deal with the application of the ideal gas law. The ideal gas law formula is PV=nRT, where P is pressure, V is volume, n is number of moles, R is gas constant, and T is temperature. We can utilize this formula to solve each of these problems.

1.00 mol helium gas at STP in a balloon: At STP (standard temperature and pressure), 1 mole of any gas occupies 22.4 L. So, if the pressure doubles to 2.00 atm, the volume will reduce to half(by Boyle's Law (P1V1=P2V2)) which is 11.2L.

0.10 mol neon gas at STP in a syringe: At STP, 0.10 mol of gas will occupy a volume of 0.10 mol x 22.4 L/mol = 2.24 L.

Adding 0.10 mol argon gas to the syringe: After adding the argon, the total amount of moles of gas is 0.10 mol neon + 0.10 mol argon = 0.20 mol. At STP, 0.20 mol gas will occupy a volume of 0.20 mol x 22.4 L/mol = 4.48 L. So, the syringe will indicate 4.48 L after the argon is added and the pressure and temperature remain constant.

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Answer:

the kitten

Explanation:

4/9 x 2/2 = 8/18

8/ 18 is greater than 7/18

Answer:

Moles of TNT = 2.38 moles

Explanation:

First , calculate the molar mass of the compound TNT

The formula is : C7H5N3O6

How to calculate molar mass?

Molar mass : It is the mass of substance in grams which is present in 1 mole of the compound.It is calculated by:

Molar mass = Number of atoms x the atomic mass of the element

Atomic mass of the elements are given below :

C = 12.0107

H = 1.0079

N = 14.0067

O = 15.9994

Molar mass of C7H5N3O6 =

= (7 x C) + (5 x H) + (3 x N) + (6 x O)

= 7(12.0107) +5(1.0079) + 3(14.0067) + 6(15.9994)

Molar mass = 227 .13 gram/mole

Mole are calculated using the formula:

[tex]Moles =\frac{given\ mass}{Molar\ mass}[/tex]

Given mass = 539.88 grams

Molar mass = 227.13 g/mole

[tex]Moles =\frac{539.88}{227.13}[/tex]

= 2.3769

Moles = 2.38 moles

The number of moles of TNT in 539.88 g is 2.38. This is found by dividing the mass of TNT by its molar mass.

To solve this problem, we need to first calculate the molar mass of TNT (C7H5N3O6). The molar masses of Carbon (C), Hydrogen (H), Nitrogen (N), and Oxygen (O) are roughly 12.01 g/mol, 1.01 g/mol, 14.01 g/mol, and 16.00 g/mol respectively. Thus, the molar mass of TNT is:

(7*12.01 g/mol) + (5*1.01 g/mol) + (3*14.01 g/mol) + (6*16.00 g/mol) = 227.13 g/mol

Then, use the formula to calculate the moles:

moles of TNT = mass(g) / molar mass(g/mol)

Substitute the values:

moles of TNT = 539.88g / 227.13 g/mol = 2.38 mol

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Answer: 3250 N

Explanation: Force can be calculated as the product of mass and acceleration:

F= ma

= 2500 kg x 1.3 m/s²

= 3250 N

Answer:

3250

Explanation:

Answer:

x = 1.01166

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Explanation:

Step 1: Define

y = 1.2345x - 0.6789

y = 0.570

Step 2: Solve for x

Final answer:

To solve the given linear equation for x, add 0.6789 to both sides, divide by 1.2345, and then substitute y = 0.570 to find the value of x as 1.012 .

Explanation:

To solve the equation y = 1.2345x - 0.6789 for x, given that y = 0.570, we will isolate x on one side of the equation. First, we add 0.6789 to both sides to get y + 0.6789 = 1.2345x. Then, we divide both sides by 1.2345 to find x:

x = (y + 0.6789) / 1.2345

Substituting 0.570 for y, we get:

x = (0.570 + 0.6789) / 1.2345

x= 1.012

After performing the calculations, we find the value of x to be 1.012 that satisfies the given equation with y equal to 0.570.

Answer:

GAS

Explanation:

The movement of the particles is fast in increasing order of Solid< Liquid< Gas. The particles move faster in fluids which are liquids and gases. The movement of the particles of a substance depends on many factors like temperature, pressure, viscosity of the fluid, density, surface or environment in/on which its flowing.

The rise in temperature of the substance increases the kinetic energy of its particles which makes them to move faster. The increase in temperature of the solids up to a certain point melts them which allows them to flow, causing the particles to move faster than before, also on increasing the temperature of the liquids converts them to gas which makes their particles to move more rapidly and freely.

Particles move the fastest in substances with the least viscosity, meaning they have lower resistance to flow. Gaseous substances, which have weaker intermolecular forces, allow particles to move rapidly, thus, in gas particles move the fastest compared to liquids and solids.

The question asks about the movement speed of particles in different substances. In general, particles move the fastest in substances with the least resistance to flow, which indicates that these substances have the least viscosity. Conversely, particles move slowly in substances with higher resistance to flow, meaning they are more viscous. As particles move faster, there is less curvature in their trajectory. For instance, particles that move at speeds close to the speed of light, such as beta particles emitted by radioactive substances, will exhibit almost straight trajectories.

Substances with stronger intermolecular forces tend to be more viscous and have slower-moving particles, while substances with weaker intermolecular forces have faster-moving particles and lower viscosity.

Within the states of matter, solid particles are mostly rigid with only vibrations, liquid particles are more mobile, and gas particles are the most mobile, moving at high speeds and frequently colliding with each other. Therefore, in the context of states of matter, gas particles move the fastest.

Option B

25°C and 1 M reactants are the standard conditions under which reduction potentials are measured

Explanation:

A reduction potential contains the drift of a particle to be subdued by exerting up supplementary particles. The standard reduction potential is the reduction potential of a particle beneath particular, regular situations. Standard reduction potentials can be beneficial in discovering the directionality of a reaction.

This is usually estimated in volts. Proportionately variety has its individual inherent reduction potential.  The standard reduction potential is regulated beneath conventional circumstances: 25 °C and 1 M concentration for all ion engaging in the reaction

Answer:

carbon dioxide

Explanation:

Answer:

A) Fission reactors release harmful gases into the atmosphere — mainly CO₂.  

Explanation:

Fission reactors release no CO₂ into the atmosphere.

B, C, and D are correct.

Answer:

1.06 g/cm³

Explanation:

Data given:

volume of liquid = 95.5 cm³

mass of the liquid = 101 g

density = ?

Solution:

To calculate density formula will be used

                   d = m/v

where

d = density

m = mass

v = volume

put values in above formula

                  d =  101 g / 95.5 cm³

                  d = 1.06 g/cm³

so. the density of liquid = 1.06 g/cm³

Final answer:

The density of a liquid, given its mass is 101 grams and volume is 95.5 cm³, is calculated using the formula Density = Mass / Volume, resulting in a density of 1.057 g/cm³.

Explanation:

The question asks to calculate the density of a liquid when given its mass and volume. Density is found by dividing the mass of a substance by its volume. We can use the formula Density = Mass / Volume to find the answer.

In this case, the mass of the liquid is 101 grams and the volume is 95.5 cm3. Plugging these values into the formula gives:

Density = 101 grams / 95.5 cm3 = 1.057 g/cm3.

Therefore, the density of the liquid is 1.057 g/cm3.

Answer:

There's probably going to have some signs that might lead to the storm.

Explanation:

Answer:

The density of a substance is the same regardless of the amount.

Explanation:

Answer:

Explanation:

CaCO3(s) + 2 HCl(aq) --> CaCl2(aq) + CO2(g) + H2O(l)

Answer:

CaCl2 + CO2 + H2O

Explanation:

CaCO3 + 2HCl -> CaCl2 + CO2 + H2O There is one Calcium atom on the left and one Calcium atom on the right so this is balanced. There is 1 Carbon atom on the left and 1 Carbon atom on the right so this is balanced. There are 3 Oxygen atoms on the left and 3 Oxygen atoms on the right so this is balanced.

The amount of grams of phosphorus that are recommended is 0.700 g

Why?

This is an unit conversion problem. To convert between units we use conversion factors. In this case the conversion factor we want is from mg to g, and this is relatively simple: 1000 mg = 1 g. Now, we arrange the quantities in the following way:

[tex]700 mg P*\frac{1g}{1000mg}=0.700 g[/tex]

Conversion factors are really useful for converting units! Just remember to put the unit you don't want at the bottom, and the one you want at the top.

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Answer:

0.700mg

Explanation:

Elemental Phosphorus is probably different than supplement phosphorus. We cannot ingest red, yellow, or white phosphorus.

So 700mg of something is technically .7grams of that something, but supplemental phosphorus would weigh a bit more per volume of supplement because it would contain other atoms besides just phosphorus, to allow it to become BIOAVAILABLE. So depending on the molecular makeup of that edible phosphorus it may weigh 2grams per .7gram of pure phosphorus, or it could weigh 1.4grams or .9grams…. anything over that original .7grams

700mg of phosphorus is .7grams pure, but you will consume more than .7grams to get it in your system.

Answer:option D. All of these

Explanation:

Answer:Sodium chloride solid is not a mixture. ... It cannot be physically separated into its components, Na+ and Cl−

Explanation:Sodium chloride is formed when sodium atoms interact with chlorine atoms. When this occurs, sodium will donate an electron (which is a negatively-charged particle) to chlorine. This makes sodium slightly positive and chlorine slightly negative.

Opposite charges attract, right? So then, sodium ions will attract chloride ions and form an ionic bond. By the way, chloride is the term used to designate the anion form of chlorine. The result is a crystallized salt that has properties that are different from the two parent elements (sodium and chlorine). The chemical formula for sodium chloride is NaCl, which means that for every sodium atom present, there is exactly one chloride atom.

Sodium chloride is a compound rather than a mixture because it consists of sodium and chlorine bonded together in a fixed ratio, forming a substance with unique properties different from those of the individual elements.

Sodium chloride (NaCl) is not a mixture but a compound because it is formed by a chemical reaction between the metal sodium and the nonmetal chlorine. In compounds, the components combine in a fixed ratio, exhibiting properties entirely different from the individual elements.

The formation of ionic compounds like sodium chloride involves the transfer of electrons from the metal to the nonmetal, resulting in a compound with a crystal lattice structure,  Sodium chloride is composed of sodium cations and chloride anions, and the strong ionic bonds in its structure require significant energy to break, which is not the case with mixtures.

Mixtures, unlike compounds, can vary in composition and the components maintain their own properties. In mixtures, substances like elements or compounds are just physically intermingled without chemical bonding, such as salt dissolved in water.

In contrast, every sample of sodium chloride has a uniform and definite composition and all are chemically identical, as sodium and chlorine react in a 1:1 ratio to form this vital ingredient of all animal diets.

Answer:

Number of moles = 0.116 mol

Explanation:

Given data:

Number of moles of potassium bromide = ?

Volume of solution = 68.5 mL

Molarity of solution = 1.65 M

Solution:

First of all we will convert the mL into L.

68.5 mL × 1 L /1000 mL

0.07 L

Molarity = Number of moles / Volume in litter

we will rearrange the formula:

Number of moles = molarity × volume in litter

Now we will put the values in formula:

Number of moles = 1.65 M  ×0.07 L

Number of moles = 0.116 mol

Answer: 0.11

Explanation:

Answer: 3.5 moles V2O5

Explanation: First balance the chemical equation to find the stoichiometric factor between VOCl3 and V2O5

2 V2O5 + 6 Cl2 => 4 VOCl3 + 7 O2

So the mole to mole ratio is 2 moles V2O5 to 4 moles of VOCl3

Solution

7 moles VOCl3 x 2 moles V2O5 / 4 moles VOCl3 = 3.5 moles V2O5

Answer:

The equilibrium constant Kc for the reaction is :

16.07

Explanation:

The balanced equation is :

[tex]H_{2}(g)+I_{2}(g)\rightleftharpoons 2HI(g)[/tex]

First ,

"At the equilibrium, 60% of the hydrogen gas had reacted"

This means the degree of dissociation = 60% = 0.6

Here we are denoting degree of dissociation by ="x" =  0.6

Now , consider the equation again,

[tex]H_{2}(g)+I_{2}(g)\rightleftharpoons 2HI(g)[/tex]

H2                       I2                 2HI

0.35                   1.6                0            (Initial Concentration)

0.35(1 - x)           1.6(1 - x)         2x    (At equilibrium)

0.35(1 - 0.6)       1.6(1 - 0.6)      2(0.6)

0.14                     0.64                 1.2

calculate the concentration of each:

[tex]Concentration =\frac{moles}{Volume(L)}[/tex]

[tex]C_{H_{2}}=\frac{0.14}{2}[/tex]  

[tex]C_{H_{2}}=0.07moles/L[/tex]

[tex]C_{I_{2}}=\frac{0.64}{2}[/tex]  

[tex]C_{I_{2}}=0.32moles/L[/tex]

[tex]HI=\frac{1.2}{2}[/tex]  

[tex]HI=0.6moles/L[/tex]

The equilibrium constant for this reaction "Kc" can be written as:

[tex]Kc=\frac{[HI]^{2}}{[H_{2}][I_{2}]}[/tex]  

[tex]Kc=\frac{0.6^{2}}{0.07\times 0.32}[/tex]

[tex]Kc=\frac{0.36}{0.0224}[/tex]

[tex]Kc=16.07[/tex]