CHEMISTRY MIDDLE SCHOOL

How does a solution of sugar in water is different from a solution of starch in water with respect to:(i) Tyndall effect
(ii) Filterability
(iii) Appearance

Answers

Answer 1
Answer: i) sugar solution wil not show tyndall effect , as the particle size is too small to reflect light , nut starch solution will show tyndall effect .

Btw i donno why but i feel like we study in the same school like the u have are so similar ......

Related Questions

How many grams of N2 can be produced when 6.50 g of O2reacts?
This runner completed a 100 meter race with a time of 13.75 seconds. what was her average speed
How is the telegraph you made like the one morse made?
What happens to the molecules in a gas when it condenses?
How many grams are there in 7.4 x 1023 molecules of H2SO4?

How much of each gas is there in 100cm3 air?

Answers

Each 100 cm3 of air, constitutes 78cm3 nitrogen, 21cm3 oxygen and 1cm3 constitutes of other gases like Argon, ozone, carbon dioxide and water vapour in small amounts.
Dry air contains 78% nitrogen , 21% oxygen and 1%noble gases.

The flow of electrical charges in this is caused by energy differences and voltagea) voltage b) insulator c) current d) circuit

Answers

Answer: A difference in voltage

Or potential difference

Explanation:Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points. The difference in electric potential between two points in a static electric field is defined as the work needed per unit of charge to move a test charge between the two points.

Electric current is the flow of electrons in a conductor. For example, the first element has more positive charges, so it has higher potential. On the other hand, the second element has charges that are more negative so it has lower potential. The difference between two points is called potential difference
D. Circuit . I know this because i have took this course already.

Which statement best relates an empirical formula with a molecular formula? They are always different for the same compound. Subscripts of empirical formulas can be reduced. Molecular formulas can be determined from empirical formulas. They both show the actual ratio of elements for a compound.

Answers

ANSWER

empirical formula is the simplest ratio of whole numbers of components making up a compound

molecular formula is the actual composition of components making up a compound

to analyse each statement

A.They are always different for the same compound. -

the empirical formula in some instances can be the same as the molecular formula. therefore this statement is incorrect.

B. Subscripts of empirical formulas can be reduced

empirical formula gives the simplest ratios and the subscripts cannnot be further simplified therefore this is incorrect

C. Molecular formulas can be determined from empirical formulas

using the empirical formula, the molecular formula can be determined. therefore its correct.

D. They both show the actual ratio of elements for a compound

only the molecular formula gives the actual ratio of elements whereas the empirical formula gives the simplest ratio of elements. this statement is incorrect

The correct statement is C.

Answer:

Molecular formulas can be determined from empirical formulas.

Explanation:

Aqueous solutions of chromium(III) iodide and potassium hydroxide react to give a chromium(III) hydroxide precipitate and aqueous potassium iodide.Express your answer as a chemical equation. Identify all of the phases in your answer. Enter noreaction if there is no reaction.

Answers

CrI₃ (aq) + 3 KOH (aq) → Cr(OH)₃ (s) + 3 KI (aq)

Explanation:

The chemical reaction between chromium (III) iodide (CrI₃) and potassium hydroxide (KOH):

CrI₃ (aq) + 3 KOH (aq) → Cr(OH)₃ (s) + 3 KI (aq)

where:

(aq) - aqueous

(s) - solid

The reaction will produce solid chromium(III) hydroxide (Cr(OH)₃) and KI aqueous potassium (KI).

Learn more about:

problems with chromium(III) salts

brainly.com/question/9821533

#learnwithBrainly

How do you do problem #15?

Answers

you would convert the cg to g. 1.66 cg is 0.0166 g. then you add. 0.398 + 0.0166 = 0.4146. the answer is 0.4146 grams.

1) What is the state of silver at room temperature , use the diagram in the image to explain why?2)What temperature is silver…..
a) as a liquid
b) as a gas

Answers

Liquid state because when the silver is heated at 961 degrees the kinetic energy produced and change the state of solid to liquid state.

2) liquid state
Other Questions
Lisa wrote the following steps in the formation of metamorphic rocks.Step 1: Rocks pushed up onto Earth's surface due to movement of tectonic platesStep 2: Rocks experience extreme heat and pressureStep 3: Mineral composition of rocks changesStep 4: Original rocks transform into a new rockWhich step contains an error?
3. Mr. Hill has 27 students in his classand Mr. Chang has 24 students in hisclass. Both classes will be divided intoequal sized teams within their ownclasses. What is the greatest number ofstudents that can be on team so that allthe teams are an equal number?​
Preserved remains have turned to what?
1.00l of octane (M=114.23 g/mol, d=0.703 g/cm3) undergoes a combustion reaction with 5.0 L of oxygen at 25 celcius and 1.0 atm pressure. what mass of co2 (M=44.01 g/mol) is produced?