CHEMISTRY COLLEGE

Initial temperature of metal= 100 C°Initial temperature of water= ? C°
Final temperature of both =? C° (Copper)

Answers

Answer 1

Answer:

Answer:

1.)100

2.)22.7

3.)24.6

Explanation:

EDGE2020

Answer 2

Answer:

Water is 22.4

Final for both us 27.1

Explanation:

I just finished this part of the lab

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hich of the following statements is true about cocaine? multiple choice cocaine is a powerful central nervous system opiate. cocaine may cause users to become overweight. cocaine hydrochloride powder produces a higher rate of dependence than crack cocaine.
g For a given arrangement of ions, the lattice energy increases as ionic radius ________ and as ionic charge ________.
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What is the speed of a basketball that is thrown 18meters in 4 seconds?

By pipet, 11.00 mL of a 0.823 MM stock solution of potassium permanganate (KMnO4) was transferred to a 50.00-mL volumetric flask and diluted to the calibration mark. Determine the molarity of the resulting solution. A stock solution of potassium permanganate (KMnO4) was prepared by dissolving 13.0g KMnO4 with DI H2O in a 100.00-mL volumetric flask and diluting to the calibration mark. Determine the molarity of the solution Molarity= O.822 M

Answers

Answer:

1) 0.18106 M is the molarity of the resulting solution.

2) 0.823 Molar is the molarity of the solution.

Explanation:

1) Volume of stock solution = $V_1=11.00 mL$

Concentration of stock solution = $M_1=0.823 M$

Volume of stock solution after dilution = $V_2=50.00 mL$

Concentration of stock solution after dilution = $M_2=?$

$M_1V_1=M_2V_2$ ( dilution )

$M_2=(0.823 M* 11.00 mL)/(50 ,00 mL)=0.18106 M$

0.18106 M is the molarity of the resulting solution.

Molarity of the solution is the moles of compound in 1 Liter solutions.

$Molarity=\frac{\text{Mass of compound}}{\text{Molar mas of compound}* Volume (L)}$

Mass of potassium permanganate = 13.0 g

Molar mass of potassium permangante = 158 g/mol

Volume of the solution = 100.00 mL = 0.100 L ( 1 mL=0.001 L)

$Molarity=(13.0 g)/(158 g/mol* 0.100 L)=0.823 mol/L$

0.823 Molar is the molarity of the solution.

Final answer:

To determine the molarity of the resulting solution, we can use the formula M1V1 = M2V2. Plugging in the given values, we find that the molarity of the resulting solution is 0.180 MM.

Explanation:

To determine the molarity of the resulting solution, we need to use the formula:

M1V1 = M2V2

Where M1 is the molarity of the stock solution, V1 is the volume of the stock solution used, M2 is the molarity of the resulting solution, and V2 is the final volume of the resulting solution.

Using the given values, we have:

M1 = 0.823 MM

V1 = 11.00 mL

V2 = 50.00 mL

Substituting these values into the formula, we can find the molarity of the resulting solution.

M2 = (M1 * V1) / V2

Plugging in the values:

M2 = (0.823 MM * 11.00 mL) / 50.00 mL = 0.180 MM

The molarity of the resulting solution is 0.180 MM.

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What are some examples of matter?

Answers

Answer:

An apple.

A person.

A table.

Air.

Water.

A computer.

Paper.

Iron.

Hope this helps you

Answer:

your boddy is made of mater and a clock too it is still a mater of time.

Explanation:

Which of the following chemical equations violates the law of conservation of mass? (1 point) Li2SO4 + 2Ca(NO3)2 yields 2LiNO3 + 2CaSO4 Ti + 2Cl2 yields TiCl4 2C2H2 + 5O2 yields 4CO2 + 2H2O MgSO4 + 2NaOH yields Mg(OH)2 + Na2SO4

Answers

i hope it hepls.......

Answer: Li2SO4 + 2Ca(NO3)2 —> 2LiNO3 + 2CaSO4

3Identify the ions present in K2HPO4.
1) K+ and H+ and PO43-
6
2) K 2+ H+, and PO43-
9
3) K+, H+, p3-, and O2-
4) K2H3+ and PO43-
5) K2HPO4 is not ionic.

Answers

Answer:

K⁺ and HPO₄²⁻ ions are present in K₂HPO₄

Explanation:

K₂HPO₄ consist of anion and cation such as HPO₄²⁻ and K⁺. We can see that the charge on HPO₄²⁻ is negative 2. Thus inroder to balance the charge and to neutral the compound two potassium ions are attached because the charge on one atom of potassium is K⁺.

Properties of K₂HPO₄ :

It is salt of phosphoric acid.

Its density is 2.44 g/cm³.

It is odourless compound.

It is white powder and soluble in water.

It is used in fertilizer because it provide phosphorus which is beneficial for the growth of plants.

It is also used as a additive in food.

It is inorganic compound and also used as buffering agent.

Final answer:

The correct ions present in K2HPO4 are K+, H+, and PO43-. Here, potassium (K+) ions, hydrogen (H+) ion and phosphate (PO43-) ion are released.

Explanation:

The compound K2HPO4 dissociates in water to form ions. The correct answer from your selection would be the first one. When K2HPO4 is added to water, it dissociates into its ions 'K+' (Potassium), 'H+' (Hydrogen) and 'PO43-' (Phosphate). So, the ions present in K2HPO4 are K+, H+ and PO43-. Please note that K2HPO4 is also called dipotassium hydrogen phosphate.

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What factors govern the position of an IR absorption peak? Select one or more correct answers.(A) strength of the bond
(B) effect of a magnetic field on nucleus spin
(C) masses of the atoms involved in the bond
(D) the type of vibration being observed

Answers

Answer:

The factors that govern the position of an IR absorption peak are:

(A) strength of the bond

(C) masses of the atoms involved in the bond

(D) the type of vibration being observed

Explanation:

In infrared spectroscopy the molecules absorb the frequencies that are characteristic of their structure. These absorptions occur at resonance frequencies, that is, the frequency of the absorbed radiation coincides with the frequency of vibration. The energies are affected by the shape of molecular potential energy surfaces, the masses of atoms and the associated vibronic coupling. The resonance frequencies are also related to the strength of the bond and the mass of the atoms at each end of it. Therefore, the frequency of vibrations is associated with a particular normal movement mode and a particular type of link.

Gasline is solid by the liter in many countries. How many liters are required to fill a 12.0-gal gas tank?