Given the following laboratory observation, which of the following statements is NOT TRUE?Zn + CuBr2 à Cu + ZnBr2Cu + ZnBr2à No Reaction

Answer:

greater than

Explanation:

Answer:

Yes, but it would a tremendous amount of time to do so

Explanation:

You could just spray a ton of hydrogen in the atmosphere and turn the oxygen to water

The complete empirical formula of the organic compound is C₅H₂.

Empirical formula is the simplest formula of an organic compound. The balanced chemical equation of the given organic compound can be determined using the general formula for balancing oxidation reaction of organic compounds as shown below.

[tex]C_xH_y + (x+ \frac{y}{4} )O_2 = xCO_2 \ + \ \frac{y}{2} H_2O[/tex]

Molecular mass of CO2 = 44 g/mol

mole = reacting mass /molecular mass

mole = 4.4/44 = 0.1

mole = 0.72/18 = 0.04

From the empirical formula, we have [tex][?]_5H_{[?]} = C_5H_{[?]}[/tex]

[tex]0.1 \times n = 5\\\\ n = \frac{5}{0.1} = 50[/tex]

From the result above, if we multiply 0.1 by 50 we will have 5 which is already given to us as C₅.

[tex]x = 0.1 \times 50\\\\x = 5[/tex]

Then multiply 0.04 for y by the same factor.

[tex]y = 0.04 \times 50\\\\y = 2[/tex]

Thus, the complete empirical formula of the organic compound is C₅H₂.

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Answer:

12-18 65mg  or sometimes 130mg if its just one or 1/2 a tablet

Explanation:

3.33 liter is the volume of 0.200 mole of an ideal gas at 200 kPa pressure and 400 K temperature.

Ideal gas equation for gas will be written as:

PV = nRT, where

P = pressure of gas = 200 kPa

n = moles of gas = 0.2 mole

T = temperature of gas = 400K

R = universal gas constant = 8.314 L.Pa/K.mole

V = to find?

On putting all these values on the above equation, we calculate for V as:

V = (0.2×8.314×400) / 200 = 3.325 = 3.33 L

Hence, option (2) is correct i.e. 3.33 L.

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Answer:

H2C3H2O4 + 2KOH → K2C3H2O4 + 2H2O

Answer:

A chemical change occurs when the reactants chemical compositions have changed

Explanation:

a change in colour, change in temperature, change in smell, formation of a precipitate, or the formation of gas bubbles

Hopes this helps

Answer:

3.213J/mol

Explanation:

first specific heat capacity of water = 4200J/Kg K

Q=mass×temperature difference×specific heat capacity

Q=1.53×(24.3-20)×4200

Q=25.704 J

heat of solution= quantity of heat ÷ amount of substance

heat of solution= 25.704÷8

heat of solution= 3.213J/mol

Lewis structure is the electron dot representation of the atomic and molecular bonds of the molecules. Trigonal planar is the shape of the formaldehyde.

A trigonal planar shape of the molecule is the arrangement of the central atom attached to the other three atoms making them look triangle-shaped.

The attachment of the carbon to the two hydrogens and one oxygen atom can be given by the VSEPR theory. The number of the electron pair in the molecule is 3 making them [tex]\rm sp_{2}[/tex] hybridized and hence have a trigonal planar shape.

Therefore, option D.  trigonal planar is the shape.

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[tex]Important[/tex] [tex]Procedures[/tex]

▬▬▬▬▬▬▬▬▬

Wear these items...

∴ Hope this helps! Please give thanks. ∴

To prevent inhaling spill vapors. Avoid attempting to clean up a spill if it is in an area that isn't well-ventilated. Send out a call for help to respond to and clean up the spill.

Additionally, more severe side effects include breathing problems, coughing, wheezing, a faint feeling, or weakness that may result from significant chemical exposure. The most dangerous substances can cause immediate collapse, convulsions, and possibly even death.

Wearing personal protection equipment (often known as "PPE") helps reduce exposure to a number of risks. Gloves, foot, and eye protection, protected hearing equipment (earplugs, muffs), hard helmets, respirators, and complete body suits are a few examples of PPE.

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#SPJ3

Answer:

Since I was not present in your lesson, I can only guess your vocabulary words. I am guessing consistency though.

If fluorine is stronger than carbon, fluorine will receive a negative charge.

The electronegativity series is the order in which elements of the periodic table are ranked in terms of their negative charges.

Elements with higher electron affinity are positioned higher in the series. According to this question, fluorine is stronger than carbon.

This means that fluorine will receive a negative charge (-) to become more electronegative.

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Answer:

see below

Explanation:

All of them are considered reactants because a reactant is a a substance that takes part in and undergoes change during a reaction.

Answer:

A. stored energy

Explanation:

potential energy is stored energy.

kinetic energy is the energy of motion

Answer:

In areas without excessive light pollution, a band of light can be seen spanning the night sky ... - did not match any news results.

Suggestions:

Explanation:

Answer:

stars in the milky way

Explanation:

The band of light that can be seen spanning the night sky comes from stars in the Milky Way Galaxy. The Milky Way Galaxy is a spiral galaxy that contains hundreds of billions of stars.

The new volume of the balloon which was initially 3 L is 1.86 L

The new volume of the balloon can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(1.5 × 3) / 293 = (2.5 × V₂) / 303

Cross multiply

293 × 2.5 × V₂ = 1.5 × 3 × 303

732.5 × V₂ = 1363.5

Divide both side by 732.5

V₂ = 1363.5 / 732.5

V₂ = 1.86 L

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Answer:

1.9L !!!!!

Explanation:

Based on the data provided, the empirical formula of the compund is CuCl2.6H20 and the percentage mass of copper is 24.8%.

Empirical formula is a formula showing the simplest ratios in which elements in the compund are combined.

From the data provided:

Mass of Hydrated Copper chloride = 1.00 g

Mass of dehydrated Copper chloride = 20.976 - 20.43 = 0.546 g

Mass of Water = 21.43 - 20.976 = 0.454 g

Mass of Copper = 0.248 g

Masd of Chlorine = 1.00 - (0.454 + 0.248) = 0.298

Mole ratio:

Cu = 0.248/64 = 0.004

Cl = 0.298/35.5 = 0.008

H2O = 0.454/18 = 0.025

Dividing with the smallest value:

Cu = 0.004/0.004 = 1

Cl = 0.008/0.004 = 2

H2O = 0.025/0.004 = 6

Therefore;

Empirical formula = CuCl2.6H20

Percentage mass of copper = 0.248/1.00 × 100%

Percentage mass of copper = 24.8%

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Molarity is the molar concentration of the solute dissolved in a volume of a solution. The molarity of the solution prepared by dissolving barium chloride will be 0.085 M.

Molarity is the ratio of the moles of the solute to that of the volume of the solution in Liters. It can be given as,

[tex]\rm Molarity = \dfrac{moles}{Volume}[/tex]

Here, moles of the barium chloride can be given by the mass and the molar mass and volume is given as 0.450 L.

Substituting values in the equation:

[tex]\begin{aligned}\rm Molarity &= \rm \dfrac{mass}{Molar \;mass\times Volume}\\\\&= \dfrac{8}{208.23\times 0.450}\\\\&= 0.085\;\rm M\end{aligned}[/tex]

Therefore, 0.085 M barium chloride is the molar concentration.

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Answer:

The three laws of Chemical Reaction are .The law of constant proportions. The law of multiple proportions. The law of reciprocal proportions.

A chemical compound is always found to be made up of the same elements combined together in the same fixed proportion by mass.

potassium and chlorine gas ---> chloride.

Hope this helps, have a good day.✌

Answer:

sedimentary rock layer bounded by two stratification planes

Answer: 1.34 M

Explanation:

Considering the Charles' law, the gas would have a temperature of -109.2 C.

Finally, Charles' law establishes the relationship between the volume and temperature of a gas sample at constant pressure. This law says that the volume is directly proportional to the temperature of the gas. That is, if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.

Charles' law is expressed mathematically as:

[tex]\frac{V}{T} =k[/tex]

If you want to study two different states, an initial state 1 and a final state 2, the following is true:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case, you know:

You can see that the pressure remains constant, so you can apply Charles's law.

Replacing in the Charles's law:

[tex]\frac{10 L}{293 K} =\frac{6 L}{T2}[/tex]

Solving:

[tex]\frac{10 L}{293 K} T2=6 L[/tex]

[tex]T2=\frac{6 L}{\frac{10 L}{293 K} }[/tex]

T2=163.8 K= -109.2 C

The gas would have a temperature of -109.2 C.

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Answer:

d. trust me

Explanation:

all the other answers point to why the cup stays hot.

Answer:

The enthalpy change of the reaction comes out to be -890 Kj Explanation:To calculate the enthalpy of the reaction divided in multiple steps, we use Hess's law. This law states that the heat absorbed or evolved in a given chemical equation remains same whether the process occurs in one step or several steps.To apply this law, the enthalpy of the chemical equation is treated as ordinary algebraic expression and it can be added or subtracted to form the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes that occur during intermediate reactions.

Explanation:

Answer:

A few definitions:

1. A river delta is a land-form created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment.

2. The fourth letter of the Greek alphabet ( Δ, δ ), transliterated as ‘d’.

3. a code word representing the letter D, used in radio communication, mostly in the military

4. variation of a variable or function.

5. a finite increment.

This is not a plagiarized passage this is my knowledge and research.

Answer:

eyes hair skin

Explanation:

eyes you can get from parents skin and hair

Answer:

C D

Explanation:

NOAA airplanes continuously transmit measurements of pressure, humidity, temperature, and wind direction and speed as they fall toward the sea, providing a detailed look at the structure of the storm and its intensity.