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3 years ago

OH- of a solution that has a pH of 8.57

Chemistry

1 answer:

Shkiper50 [21]3 years ago

8 0

Answer:

I think its -8.75

Explanation:

Hope this helps!11

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Change the places of 'acts against the motion of an object' and 'causes an object to change speed or direction'

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4 years ago

300.0 mL of a gas is at a pressure of 5.00 atm. What is the volume of the gas at 2.00 atm?

barxatty [35]

I think that it would be b

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3 years ago

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:

KATRIN_1 [288]

Answer: $MgS$ , $MgBr_2$ , $V_2S_5$ and $VBr_5$ are four binary ionic compounds that could be formed.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Mg is having an oxidation state of +2 called as $Mg^{2+}$ cation and $S^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MgS$ . Also $Mg^{2+}$ cation and $Br^{-}$ can combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MgBr_2$ .

Also Vanadium is having an oxidation state of +5 called as $V^{5+}$ cation and $S^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $V_2S_5$ . Also $V^{5+}$ cation and $Br^{-}$ anion can combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $VBr_5$ .

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3 years ago

Explain why the several different types of microscopes are all necessary.

zloy xaker [14]

Answer:

quoted, but you can learn from this.

Explanation:

"The different types of microscopes are all necessary because not all experiments require the same level of magnification.<em> [ For dissections low magnification is sufficient, so a dissecting microscope works very well, while for viewing single cells the 1000 fold magnification of a compound light microscope is more than adequate. ] " </em>

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3 years ago

According to the law of conservation of matter, we know that the total number of atoms does not change in a chemical reaction an

Anna71 [15]

Answer:

the answer is second option. with 2 models

Explanation:

2H2 + O2 gives 2H2O

so there's two models

7 0

3 years ago

Read 2 more answers