Which of the following is a statement of Hess's law?

Answer:

They're considered nonrenewable because they take millions of years to develop. They can't be renewed as fast as we're taking them.

Answer:

I think D. sorry if I'm wrong:)

Answer:

Veja, por exemplo, que os elementos mais eletronegativos são os que estão no canto superior direito da tabela, isto é, o flúor (4,0) e o oxigênio (3,5), e os menos eletronegativos são os que estão no canto inferior esquerdo, que são o frâncio (0,8) e o césio (0,8).

Explanation:

Answer:

a) Van der Waals intermolecular forces

b) bonded

c) one pair

d) two pairs

e) three pairs

f) chemical bonds

g) two atoms

h) two or more covalently bonded atoms

Explanation:

(a) Covalent bonds are one type of Van der Waals intermolecular forces that are formed when two atoms share electron(s)

(b) Covalent compounds consists of two bonded atoms

(c) Single covalent bond: are formed when two atoms share one pair of electrons.

(d) Double covalent bond: are formed when two atoms share two pairs of electrons.

(e) Triple covalent bond: are formed when two atoms share three pairs of electrons.

(f) A molecule is a neutral groups of atoms that are held together by chemical bonds.

(g) Diatomic molecule consists of two atoms.

(h) Molecular compound is made of two or more covalently bonded atoms.

The question is complete, the complete question is;

16.1g of bromine are mixed with 8.42g of chlorite to give an actual yield of 21.1g of bromine monochloride.

Answer:

91 %

Explanation:

Br2 + Cl2 ------>2BrCl

Number of moles of Chlorine = 8.42/71 = 0.119 moles

If 1 mole of Cl2 yields 2 moles of BrCl

0.119 moles of Cl2 will yield 0.119 moles * 2/1 = 0.238 moles of BrCl

Number of moles of Br2 reacted = 16.1/160 = 0.1 moles

If 1 mole of Br2 yielded 2 moles of BrCl

0.1 moles of Br2 yields 0.1 * 2/1 = 0.2 moles of BrCl

Bromine is the limiting reactant.

Mass of BrCl produced = 0.2 moles * 115.357 g/mol = 23.07 g

Theoretical yield = 23.07 g

Actual yield = 21.1 g

Percentage yield = Actual yield/Theoretical yield * 100

= 21.1/23.07 * 100 = 91 %

Answer:

i would go for the 2nd as far as i know they were a big continent and an earthquake separes them all

Answer:

I would say A but not sure

Explanation:

Answer:

stochiometry works with measuring quantitative relationships and used to determine the amount of products and reactants that are produced or needed in a reaction

Answer:

Stoichiometry is the calculation of reactants and products in chemical reactions in chemistry. Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals.

Answer:

Proton

Explanation:

It has a positive charge

Answer:

electron

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 117.6 \ L \ He}}[/tex]

Explanation:

Regardless of the type of gas, 1 mole at standard temperature and pressure (STP) occupies a volume of 22.4 liters. In this case the gas is helium (He).

We can set up a ratio.

[tex]\frac { 22.4 \ L \ He}{ 1 \ mol \ He}[/tex]

Multiply by the given number of moles.

[tex]5.25 \ mol \ He *\frac { 22.4 \ L \ He}{ 1 \ mol \ He}[/tex]

The moles of helium will cancel.

[tex]5.25 *\frac { 22.4 \ L \ He}{ 1 }[/tex]

[tex]5.25 * { 22.4 \ L \ He}[/tex]

Multiply.

[tex]117.6 \ L \ He[/tex]

5.25 moles of helium gas at STP is 117.6 liters of helium.

Answer:

i dont know...

Explanation:

Answer:

a. triple bond

b.diatomic atom

c. covalent bond

d. non polar covalent bond

e. covalent bond

f. sigma bonds

Answer:

I think its correct

Answer:

The average mass of all the isotopes.

Option B.

Explanation:

Have a great rest of your day.

Answer: SnO2 + 2 H2 = Sn + 2 H2O

Explanation: I used a balance equation website. It's called WebQC if you want to check it out for future help.

Answer:

increase the temperature

Explanation:

if you increase the temperature, the dissolving rate time will decrease.

The procedures that can be performed on trials 2 and 3 so that the rate of dissolving is the same as trial 1 is by increasing the temperature. Therefore, the correct option is option D.

A solute dissolves together into solvent during the process of dissolution, creating a solution. We are aware that the collisions between the molecules of the solvent and the particles inside the solid crystal are what cause a solid to dissolve in water.

The pace of dissolution will rise if anything is done to make such collisions happen more frequently or with more energy. Consider attempting to dissolve little sugar in a cup of tea. A cube of sugar would dissolve more slowly than a packet of powdered sugar. Stirring or stirring the solution would speed up the rate of dissolution. The procedures that can be performed on trials 2 and 3 so that the rate of dissolving is the same as trial 1 is by increasing the temperature.

Therefore, the correct option is option D.

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Answer:

In an ionic compound a metal  is bonded to a nonmetal.

The element in the compound that has a positive charge is called the cation

while the element with the negative charge is called the anion.

Explanation:

In an ionic compound a metal  is bonded to a nonmetal.

The element in the compound that has a positive charge is called the cation

while the element with the negative charge is called the anion.

Answer:

2.45 m/s2

Explanation:

Newton's 2nd law tells us that force is equal to the mass of an object multiplied by its acceleration, or F = ma. We can solve this equation for acceleration by rearranging algebraically:

a = F/m

So:

a = (4.9N)/(2.0kg) = 2.45 m/s2

Answer:

0.0326 moles

explanation

Answer:

0.234 mol

Explanation:

m(CaCO3) = 23.4g

n(CaCO3) = ?

M(CaCO3) = 100.09 g/mol

n = m/M

n(CaCO3) = 23.4 / 100.09

                 = 0.234 mol (3 s.f.)

Answer:

coastal area with very high tides deep ocean water miles from a river's mouth

Explanation:

Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges(National Geographic Society).

Animals found in a marsh include;  frogs, toads, turtles, snakes, mammals, birds and insects. A marsh is a wetland that is dominated by herbaceous rather than woody plant species(Wikipedia). It is characterized by very high tides deep ocean water miles from a river's mouth.

Answer:

a shallow, sheltered area near an estuary

Explanation:

Answer:

A true

Explanation:

Bald eagles have white heads distinguishing them from the rest of their body(which is dark brown

Answer:

D aka synthesis

Explanation:

Got question and got it right :) have a good rest of your day

Answer:

From the solubility curve, which salt shows the least change in solubility as the temperature increases? NaCl

Explanation:

According to Boyle's law, temperature being constant the volume of the balloon at pressure 3.3 atmospheres is 138.18 ml.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,

P₁V₁=P₂V₂

Substitution in above equation gives, V₂=1×456/3.3=138.18 ml.

Thus, the volume of balloon is 138.18 ml.

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Answer:

1.56g/L it will be as per my calculation if I am not wrong so

Answer: D: 1.43

The expected density of the given sample of oxygen gas at STP can be calculated using the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

At STP, the pressure is 1 atm and the temperature is 273 K. We are given that the mass of the oxygen gas is 4.8 g. To find the number of moles of oxygen gas, we can use its molar mass, which is 32.00 g/mol:

n = mass / molar mass = 4.8 g / 32.00 g/mol = 0.15 mol

Using the molar volume of an ideal gas at STP, which is 22.4 L/mol, we can find the volume of the oxygen gas:

V = n × molar volume = 0.15 mol × 22.4 L/mol = 3.36 L

Therefore, the expected density of the given sample of oxygen gas at STP is:

density = mass / volume = 4.8 g / 3.36 L = 1.43 g/L

Therefore, the expected density of the given sample of oxygen gas at STP is 1.43 g/L.