What is the length of the paper clip in cm

Answer:

3.75 mole

Explanation:

molecular mass of NaOH = 39.97 gm

i.e,

==>39.97 gm NaOH contains 1 mole of NaOH

==>1 gm of NaOH contains 1/39.97 mole of NaOH

==>150 gm of NaOH contains (1/39.97) *150 mole of NaOH

==>150 gm of NaOH contains 3.75 mole of NaOH.

As a result, the Poles have high pressure (cold air) while the Equator has low pressure (warm air). Hot air from the Equator rises and goes toward the Poles, while colder air from the Poles lowers and moves toward the Equator, resulting in a continuous wind pattern.

Given that the pressure remains constant, if the temperature of the helium balloon decreases to the given value, the volume increases to 2125.5L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 2500L × 329.15K ) / 387.15K

V₂ = 882875LK / 387.15K

V₂ = 2125.5L

Given that the pressure remains constant, if the temperature of the helium balloon decreases to the given value, the volume increases to 2125.5L.

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Answer:

See below

Explanation:

9.045/8.492 * 100% = 106.5%

There was other solids already dissolved in the water, or dust or other contaminants got into the water. ....or the measurement was incorrect. (like maybe the solid was still wet?)

Answer:

dfgdsgdffgfddffg

Explanation:

dfggffgdgdf

The pressure of the compressed tank that was initially filled with hydrogen gas and has a pressure of 100kPa is pressure in the 250mL tank increases.

Boyle's law states that the observation that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.

According to this question, a 1 L compressed tank is filled with hydrogen gas and has a pressure of 100kPa.

If all of the hydrogen gas is removed from the tank and pumped into a 250mL tank, which is smaller in volume, the pressure in the 250mL tank increases.

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Answer:

Succinic acid

Explanation:

The most common possibility is succinic acid

As it has decimals after whole no till hundredth it contains OH and C in most of the cases .

Let's check for succinic acid

Yes approximately equal

Molecular formula is.

(CH_2)_2(CO_2H)_2

Answer:

b) soil

heterogenous means you can pick out individual bits.

The volume of the 12.96 g sample of pure hydrogen gas is 145.24 L

We'll begin by calculating the number of mole in 12.96 g hydrogen gas. This can be obtained as follow:

Mole = mass / molar mass

Mole of Hydrogen gas = 12.96 / 2

Mole of Hydrogen gas = 6.48 mole

To determine the volume of the pure hydrogen gas, we shall assume that the gas is at standard temperature and pressure (STP). Thus, we shall apply the ideal gas equation as illustrated below:

V = nRT / P

V = (6.48 × 0.0821 × 273) / 1

V = 145.24 L

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Textiles for clothes are also sometimes finished with chemicals, for example, to stiffen them and make them wrinkle-free. Chemicals in their nanoforms are helping make textiles more resistant to water, stains, wrinkles, bacteria and mould. Some of the chemicals can be harmful.

☆...hope this helps...☆

_♡_mashi_♡_

Answer: 0

Explanation:

If 3 electrons were to be gained, then the number of protons would equal the number of electrons.

Answer:

oxidation is an energy that produces reaction in a living cell.

Answer:

the process or result of oxidizing or being oxidized.

Explanation:

The equation is CuCl2 + Na2S ------> 2NaCl + CuS because  Na is ahead of Cu in the electrochemical series.

A balanced reaction equation is one in which the number of atoms of each element on the reactant side is equal to the number of atoms of the same element on the product side.

In this case, the balanced reaction equation is;

CuCl2 + Na2S ------> 2NaCl + CuS. The reaction occur thus because Na is ahead of Cu in the electrochemical series and must always displace it from its aqueous solution.

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100.0 degrees Celsius = 100.0 + 273 = 373.0 K

[tex]\frac{750}{373.0}=\frac{V_{2}}{673.0} \\ \\ V_{2}=\frac{(673.0)(750)}{373.0} \approx \boxed{1350 \text{ mL}}[/tex]

Find pH of all

#A

pH=-log[H+]

#B

#C

pOH=-log[OH]

pH=

#4

pH

So our answers

Answer: Substance B has stronger bonds, and it takes more energy to undergo a phase change.

Explanation:

Substances with higher boilings have stronger intermolecular forces, and thus require more energy for phase changes to occur.

Answer:

temp is same

Explanation:

The change of state portionsof the graph are at 2  and 4....and the temp is the same at the beginning and ends.

 change of state is a constant temp process

Answer:

hello :)

Explanation:

Water vapor in the air reaches its dew point as it cools in the air around the can, forming liquid drops of water. Condensation is the process where water vapor becomes liquid.

The molality of 35 g acetone dissolved in 0.95 kg water is 0. 63 mol/kg

Using the formula:

Molality = number of moles of solute÷ mass of solvent

Note that number of moles = mass divided by the molar mass

mass of acetone = 35g

Molar mass of acetone = 58. 1g/mol

Number of moles of acetone = 35÷ 58.1 = 0.602 mole

Molality of acetone = 0. 602÷ 0. 95 = 0. 63 mol/kg

Hence, the molality of acetone is 0. 63 mol/kg

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The equation for each reaction is written according to the relevant as below.

The reaction between iron and sulfur to form iron (II) sulfide is written as:

  [tex]Fe + S --- > FeS[/tex]

The reaction between hydrogen gas and oxygen gas to form water is written as:

[tex]H_2 (g) + O_2 (g) --- > H_2O (l)[/tex]

The reaction of aluminum oxide to form aluminum and oxygen gas is written as:

[tex]Al_2O_3 --- > Al + O_2[/tex]

Zinc and copper(II) sulfate react to form zinc(II) sulfate and copper as follows:

[tex]Zn+CuSO_4--- > ZnSO_4+Cu[/tex]

Potassium hydroxide and hydrogen bromide react to form potassium bromide and water as follows:

[tex]KOH + HBr --- > H_2O + KBr[/tex]

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Answer:

3.4 x 10²⁵ atoms Ag

Explanation:

To find the amount of silver (Ag) atoms, you need to use Avogadro's number to convert between moles and atoms. Make sure to arrange the ratio in a way that allows for the cancellation of moles. The final answer should have 2 sig figs to correlate with the number of sig figs in the given value (56 = 2 sig figs).

Avogadro's number:

6.022 x 10²³ atoms = 1 mole

56 moles Ag          6.022 x 10²³ atoms
--------------------  x  ----------------------------------  =  3.4 x 10²⁵ atoms Ag
                                         1 mole

Answer:

It depends on what type of test your speaking of, is it a state exam?

If you are passing a class and fail a test you will still pass. If you fail a class you do not need to take it again if you don't want to but you would have to take another class instead.

eimetchuinsumuleavtubronAnswer:

Explanation:

The study of matter and energy best describes physical science. Hence, option B is correct.

Physical science is the study of the inorganic world.

Physics is a branch of science that studies matter and its motion through space and time, along with related concepts such as energy and force. Physics is one of the "fundamental sciences" because of the other natural sciences (like biology, geology etc.)

Thus the study of matter and energy best describes physical science. Hence, option B is correct.

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(a) The displacement of point P at time t=0.10s is determined as +2cm.

(b) The displacement of point P at time t=0.20s is determined as -2cm.

Displacement is the change in position of an object. It is obtained from the product of velocity and time of motion.

x = vt

x = 10 m/s x 0.1 s = 1 m

Each wave will travel 1 m to the right or to the left, depending on the initial direction.

wave B and C superimposed and the displacement will be between A and D.

Amplitude of A = - 2cm

Amplitude of D = + 4cm

Displacement of point P = 4 cm - 2 cm =  2cm

x = 10 m/s x 0.1 s = 2 m

Each wave will travel 2 m to the right or to the left, depending on the initial direction.

Displacement of point P = (amplitude B + amplitude C) + (amplitude A + amplitude D)

Displacement of point P= (2cm - 2cm) + (2 cm - 4cm)= -2cm

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Answer:

make the house elevated

Answer:

Here's your answer.

M(C3H8) = 44 g/mol

n(C3H8) = 5000 (g)/44 (g/mol) = 113,6 mol

[tex] N = n \times N_{a} = 113,6 \times 6,02 \times {10}^{23} \\ \\ = 684,1 \times 10 ^{23} \sf{molecules} [/tex]