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vladimir2022 [97]
3 years ago
14

8. How many protons are in C-12? C-13? C-14?

Chemistry
1 answer:
NISA [10]3 years ago
5 0
C-12? (6 protons) C-13? (6 protons) C-14? (6 protons)

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5.0 gram of anhydrous calcium carbonate is reacted with an excess of dilute nitric acid. if the reaction is carried out at 25 de
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Answer:

I don’t know

Explanation:

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If the reaction 2HgO --> 2Hg + O2 is endothermic, which bonds are the strongest?
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  • Endothermic reaction means the reactant side takes heat from surrounding and get decomposed i.e ∆H=-ve
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  • HgO is Omitted from our solution option.

Hg is a atom so no bonds hence no bond strength occurs.

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Chlorine (Cl) forms a salt when it is combined with a metal. This element belongs in _____.
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8 0
3 years ago
How do vapors and gases differ
olya-2409 [2.1K]

Answer:

Difference between Vapor and Gas

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Explanation:

4 0
2 years ago
Titration of 0.824 g of potassium hydrogen phthalate required 38.314 g of naoh solution to reach the end point detected by pheno
melamori03 [73]

1.062 mol/kg.

<em>Step 1</em>. Write the balanced equation for the neutralization.

MM = 204.22 40.00

KHC8H4O4 + NaOH → KNaC8H4O4 + H2O

<em>Step 2</em>. Calculate the moles of potassium hydrogen phthalate (KHP)

Moles of KHP = 824 mg KHP × (1 mmol KHP/204.22 mg KHP)

= 4.035 mmol KHP

<em>Step 3</em>. Calculate the moles of NaOH

Moles of NaOH = 4.035 mmol KHP × (1 mmol NaOH/(1 mmol KHP)

= 4.035 mmol NaOH

<em>Step 4</em>. Calculate the mass of the NaOH

Mass of NaOH = 4.035 mmol NaOH × (40.00 mg NaOH/1 mmol NaOH)

= 161 mg NaOH

<em>Step 5</em>. Calculate the mass of the water

Mass of water = mass of solution – mass of NaOH = 38.134 g - 0.161 g

= 37.973 g

<em>Step 6</em>. Calculate the molal concentration of the NaOH

<em>b</em> = moles of NaOH/kg of water = 0.040 35 mol/0.037 973 kg = 1.062 mol/kg

3 0
3 years ago
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