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2 years ago

HELP PLEASE (If you cant answer all, that okay! First to answer all will be mark BRAINLIEST!)

Chemistry

1 answer:

Yakvenalex [24]2 years ago

4 0

Answer:

Hope this helps :)

Explanation:

Antoine Lavoisier- used patterns to predict undiscovered elements

John Newlands- Arranged elements according to their atomic

Johann Wolfgang- created groups of three elements, each based on Johann Wolfgang Dobereiner

Dmitri Mendeleev- divided elements into four categories

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1 year ago

In a titration experiment 12.5 ml of 0.500 m h2so4 neutralized 50.0 ml of naoh. the concentration of the naoh solution is ____.

s344n2d4d5 [400]

0.250 mol/L

Step 1. Write the chemical equation

H2SO4 + 2NaOH → Na2SO4 + 2H2O

Step 2. Calculate the moles of H2SO4

Moles of H2SO4 = 12.5 mL H2SO4 × (0.500 mmol H2SO4/1 mL H2SO4)

= 6.25 mmol H2SO4

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3 years ago

Which substance has a nonpolar covalent bonds? Cl2 SO3 SiO2 CCl4

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Answer:

Substance with a nonpolar covalent bonds is $Cl_2$ .

Explanation:

Polar covalent compound: This compound is formed when difference in electronegativity between the atoms is present. When atoms of different elements combine, it results in the formation of polar covalent bond. For Example: $CO_2,NO_2$ etc..

Non-polar covalent compound: This compound is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: $N_2,O_2$ etc.

Substance with a nonpolar covalent bonds is $Cl_2$ .

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