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GrogVix [38]
3 years ago
11

Filtration can separate a mixture of fine sand and coarse gravel. The holes in the filter should be large enough to allow ______

to pass through.
Chemistry
2 answers:
Charra [1.4K]3 years ago
5 0

The sand to pass through, but not the gravel. Hope this helps!

Vladimir [108]3 years ago
3 0

sand but not gravel!!!!!

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For a titration of 25 ml of naoh solution, 23.30 ml of hcl solution if used. what is the molarity of naoh
Eduardwww [97]

<span>HCl<span>(aq)</span>+NaOH<span>(aq)</span>→NaCl<span>(aq)</span>+<span>H2</span>O<span>(l)</span></span>

As you can see here, one mole of acid neutralizes one mole of base.

We use the concentration equation, which states that,

<span>c=<span>nv</span></span>

<span> <span> <span> n is the number of moles </span> <span> v is the volume of solution </span> </span> </span>

Rearranging for moles, we get,

<span>n=c⋅v</span>

So, we have:

<span><span>n<span>NaOH</span></span>=0.1 M⋅0.05 L</span>

<span>=0.005 mol</span>

Since one mole of acid neutralizes one mole of base, then we must have: <span><span>n<span>HCl</span></span>=<span>n<span>NaOH</span></span></span>.

And so,

<span><span>c<span>HCl</span></span>=<span><span>n<span>HCl</span></span><span>v<span>HCl</span></span></span></span>

<span>=<span><span>0.005 mol</span><span>0.03 L</span></span></span>

<span>≈0.17 <span>M</span></span>

3 0
3 years ago
Help please giving brainliest!
Alenkinab [10]
Answer:

Temperature and volume are directly related.

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure. :)
4 0
2 years ago
3. Which of the following is not true for atoms? (4 points) They combine to form elements and molecules. They contain negatively
Taya2010 [7]
<h3><u>Answer;</u></h3>

They are made up of elements.

<h3><u>Explanation;</u></h3>
  • An atom is the smallest particle of matter that still retains the property of the element.
  • Two or more atoms combine to form elements or compounds. Elements are formed by two or more similar atoms, while compounds are formed by two or more different elements.
  • Atoms are made up of subatomic particles; protons, electrons and neutrons. Electrons are negatively charged, protons are positively charged while neutrons have no charge.
7 0
3 years ago
Use the equation editor or "Insert Chemistry - WIRIS editor" to write the balanced molecular chemical equation for the reaction
Mariana [72]

Answer:

The balanced molecular equation  for the reaction :

Cu(NO_3)_2(aq)+K_2CO_3(aq)\rightarrow CuCO_3(s)+2KNO_3(aq)

Explanation:

The reaction between copper(II) nitrate  and potassium carbonate gives solid precipitate of copper(II) carbonate and aqueous solution of potassium nitrate.

Cu(NO_3)_2(aq)+K_2CO_3(aq)\rightarrow CuCO_3(s)+2KNO_3(aq)

According to reaction, 1 mole of copper(II) nitrate reacts with 1 mole of potassium carbonate to give 1 mole of copper(II) carbonate and 2 moles of potassium nitrate,

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What is the reaction type<br> 2 Mgl2+ Mn(SO3)2 → 2 MgSO3 + Mnl4
Oksana_A [137]

Answer:

The reaction type is double displacement

4 0
2 years ago
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