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3 years ago

Help me please will mark brainliest

Chemistry

2 answers:

Ilya [14]3 years ago

4 0

Answer:

Explanation:

Period is horizontal group, so left to right it does increase. Down the side they are numbered 1-7 and depending on valence electrons they can have different properties

murzikaleks [220]3 years ago

4 0

Answer:

Explanation:

Im pretty sure it's A. I MIGHT be wrong so dont quote me on this. THis is what the internet says:

"Atomic Radius. Atomic radii decrease from left to right across a period and increase from top to bottom along a group."

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A 30.0 mL sample of 0.200 M Ba(OH)2 is titrated with 0.100 M HCl.

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Answer:

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3 years ago

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laila [671]

Answer:

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Explanation:

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3 years ago

Write the molecular formula of ferric oxide and calcium hydroxide by criss-cross method

irina [24]

<h3>Ferric Oxide:-</h3>

$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf Fe}\put(0,0){\bf -3}\put(4,3){\sf O}\put(4,0){\bf -2}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}$

$\\ \sf\longmapsto Fe_2O_3$

<h3>Calcium Hydroxide:-</h3>

$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf Ca}\put(0,0){\bf 2}\put(4,3){\sf OH}\put(4,0){\bf -1}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}$

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3 years ago

To determine the concentration of an EDTA solution, 4.11 g of Zn metal was used. The volume of EDTA solution needed to reach the

USPshnik [31]

Answer:

2.23M

Explanation:

Molarity of a solution is calculated thus

Molarity = number of moles (n) ÷ volume (V)

According to this question, 4.11g of Zn metal was used in order to reach a volume of EDTA solution of 28.26 mL.

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3 years ago

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anyanavicka [17]

They are all made from carbon

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3 years ago

Help me please will mark brainliest ​

Help me please will mark brainliest