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3 years ago

Which of the following animals exhibits bilateral symmetry?

Chemistry

2 answers:

GarryVolchara [31]3 years ago

5 0

Option three, starfish is the correct answer since if you draw a line between it, it would be even!

nirvana33 [79]3 years ago

5 0

Answer is: 4. Sea horse.

Seahorse is species of small marine fishes in the genus Hippocampus.

A seahorse has a bilateral line of symmetry, if it cut along a central axis, the left and right half would be congruent.

In bilateral symmetry or plane symmetry, the sagittal plane divides an organism into roughly mirror image halves.

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True or false The mass of an electron is about equal to the mass of a proton.

pogonyaev

That is false (please mark me brainliest)

7 0

2 years ago

For the following reaction, 33.7 grams of bromine are allowed to react with 13.0 grams of chlorine gas.

Ira Lisetskai [31]

Explanation:

The reaction is given as;

Br2(g) + Cl2(g) ----> 2BrCl(g)

From the equation;

1 mol of Br2 reacts with 1 mol of Cl2

Converting the masses given to moles, using the formular;

Number of moles = Mass / Molar mass

Br2;

Number of moles = 33.7 g / 159.808 g/mol = 0.21088 mol

Cl2;

Number of moles = 13.0 g / 70.906 g/mol = 0.18334 mol

From the values;

0.18334 mol of Cl2 would react with 0.18334 mol of Br2 with an excess of 0.02754 mol of Br2

What is the maximum amount of bromine monochloride that can be formed? __________grams

1 mol of Cl2 produces 2 mol of Bromine Monochloride

0.18334 mol of Cl2 would produce x

Solving for x;

x = 0.18334 * 2 = 0.36668 mol

Converting to mass;

Mass = Number of moles * Molar mass = 0.36668 mol * 115.357 g/mol

Mass = 42.299 g

What is the FORMULA for the limiting reagent?

The limiting reagent is Cl2 as it determines the amount of product formed. The moment the reaction uses up Cl2, the reaction stops.

What amount of the excess reagent remains after the reaction is complete? __________grams

The excess reagent is Br2

The number of moles left is;

0.02754 mol of Br2

Converting to mass;

Mass = Number of moles * Molar mass = 0.02754 mol * 159.808 g/mol

Mass = 4.401 g

7 0

2 years ago

What is the mass of 4,48 L of SO2 at STP?

Trava [24]

Answer:

2 moles

Explanation:

Hi there !!

Given volume = 44.8 litres

Molar volume = 22.4 litres

No: of moles = Given volume / Molar volume

= 44.8 / 22.4 = 2 moles

3 0

2 years ago

Read 2 more answers

Convert 4.50 moles of fe to atoms of fe

Rina8888 [55]

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We do as follows:

4.50 mol Fe ( 6.022x10^23 atoms / 1 mol Fe ) = 2.71x10^24 atoms Fe present

7 0

2 years ago

Two cylinders are made of the same material. Cylinder A is one-fourth (1/4) the length of cylinder B and it has a radius that is

tankabanditka [31]

Answer:

$M_{A}$ : $M_{B}$ = 4 : 1