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3 years ago

Who studied cell reproduction

Chemistry

2 answers:

egoroff_w [7]3 years ago

4 0

Me,need help?or what???

nikdorinn [45]3 years ago

3 0

Mitosis or meiosis. Two types. Very different.

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Is it true that soaps are salts of sulfonic acids though some have been made from alkyl sulphonates

Neko [114]

Answer:

It is false.

Soaps are sodium and potassium salts of fatty acids.

Synthetic detergents on the other hand, are salts of long-chain alkyl sulfuric acids (sulfonic acid) or alkylbenzenesulfonic acids, rather than carboxylic acids.

Explanation:

Soaps are sodium and potassium salts of fatty acids. Soaps are made by the process of saponification in which an alkali is added to a fat or oil and then boiled to produce a salt of the fatty acid known as soap. The alkali used may be sodium or potassium hydroxide. However, the advantage of potassium soaps is that are more soluble and lather more easily.

Salts of sulfonic acids or alkylbenzenesulphonates are known as detergents. Unlike soaps, they are not salts of fatty acids and are more soluble in hard water, because the polar sulfonate ion of detergents does not readily bind to calcium and other ions found in hard water. Thus, detergents are more widely used as cleansing agents than soaps

3 0

2 years ago

Classify matter according to its composition give examples?? plzz answer quickk!!!!!!

solong [7]

Answer:

Explanation:

Matter can be classified into two broad categories: pure substances and mixtures. ... A substance that can be broken down into chemically simpler components (because it has more than one element) is a compound. For example, water is a compound composed of the elements hydrogen and oxygen.

6 0

3 years ago

What mass of carbon dioxide gas occupies a volume of 81.3L at 204 kPa and a temperature of 95.0°C?

alexandr1967 [171]

Answer:

236.9g

Explanation:

Given parameters:

Volume of gas = 81.3L

Pressure of gas = 204kPa

temperature of gas = 95°C

Unknown:

Mass of carbondioxide gas = ?

Solution:

To solve this problem, the ideal gas law will be well suited. The ideal gas law is a fusion of Boyle's law, Charles's law and Avogadro's law.

Mathematically, it is expressed as;

PV = nRT

the unknown here is n which is the number of moles;

P is the pressure, V is the volume, R is the gas constant and T is the temperature.

convert pressure into atm

101.325KPa = 1atm

204 kPa = $\frac{204}{101.325}$ = 2atm

Convert temperature to Kelvin; 95 + 273 = 368K

2 x 81.3 = n x 0.082 x 368

n = $\frac{2 x 81.3}{0.082 x 368}$ = 5.38moles

Since the unknown is mass;

Mass = number of moles x molar mass

Molar mass of carbon dioxide = 12 + 2(16) = 44g/mol

Mass = 5.38 x 44 = 236.9g

5 0

3 years ago

1 One mole of an element contains which of the following?

lozanna [386]

Answer:

1) B 2) both a and c

5 0

2 years ago

You want to make 500 ml of a 1 N solution of sulfuric acid (H2SO4, MW: 98.1). How many grams of sulfuric acid do you need?

umka21 [38]

Answer:

24.525 g of sulfuric acid.

Explanation:

Hello,

Normality (units of eq/L) is defined as:

$N=\frac{eq_{solute}}{V_{solution}}$

Since the sulfuric acid is the solute, and we already have the volume of the solution (500 mL) but we need it in liters (0.5 L, just divide into 1000), the equivalent grams of solute are given by:

$eq_{solute}=N*V_{solution}=1\frac{eq}{L}*0.5L=0.5 eq$

Now, since the sulfuric acid is diprotic (2 hydrogen atoms in its formula) 1 mole of sulfuric acid has 2 equivalent grams of sulfuric acid, so the mole-mass relationship is developed to find its required mass as follows:

$m_{H_2SO_4}=0.5eqH_2SO_4(\frac{1molH_2SO_4}{2 eqH_2SO_4}) (\frac{98.1 g H_2SO_4}{1 mol H_2SO_4} )\\m_{H_2SO_4}=24.525 g H_2SO_4$

Best regards.

4 0

3 years ago