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alina1380 [7]
3 years ago
7

The gold-foil experiment was used to discover which subatomic particle? Question 2 options: electrons protons ==> neutrons (m

y answer)
Chemistry
2 answers:
Gelneren [198K]3 years ago
8 0
Proton, the gold foil experiment indicated that the nucleus has a positive charge.
mart [117]3 years ago
8 0

Answer:Proton, the gold foil experiment indicated that the nucleus has a positive charge.

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Is sodium laureth sulfate ionic or covalent?
stepladder [879]

Answer: Covalent

Explanation:

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4 years ago
In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?
m_a_m_a [10]
Correct answer -->filtration
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4 years ago
HBrO3 <br> A. All non metals “acid subcategory”
Irina-Kira [14]
Non metals acid subcategories
4 0
3 years ago
What is the Na+ concentration in each of the following solutions:
iren [92.7K]

Sodium Sulfate = Na2(SO4) meaning there are two ions of Na+ in one mole of Sodium Sulfate the M stands for Molarity, defined as Molarity = (moles of solute)/(Liters of solution), So if the Na2SO4 solution is 3.65M that means one Liter of has 3.65 moles of Na2SO4, the stoichiometry of Na2SO4 shows that there would be two Na+ ions in solution for every one Na2SO4.

Therefore if 3.65 moles of Na2SO4 was to dissolve, it would produce 7.3 moles of Na+, and since this is still a theoretical solution, we can assume 1 L of solution.

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Use the same logic for parts b and c




5 0
3 years ago
The average propane cylinder for a residential grill holds approximately 18 kg of propane. How much energy (in kJ) is released b
brilliants [131]
Combustion is a chemical reaction between a fuel and an oxidant, oxygen, to give off combustion products and heat. Complete combustion results when all of the fuel is consumed to form carbon dioxide and water, as in the case of a hydrocarbon fuel. Incomplete combustion results when insufficient oxygen reacts with the fuel, forming soot and carbon monoxide. 

The complete combustion of propane proceeds through the following reaction:
C_{3} H_{8} + 5O_{2} --> 3CO_{2} + 4H_{2}O

Combustion is an exothermic reaction, which means that it gives off heat as the reaction proceeds. For the complete combustion of propane, the heat of combustion is (-)2220 kJ/mole, where the minus sign indicates that the reaction is exothermic. 

The molar mass of propane is 44.1 grams/mole. Using this value, the number of moles propane to be burned can be determined from the mass of propane given. Afterwards, this number of moles is multiplied by the heat of combustion to give the total heat produced from the reaction of the given mass of propane.

 14.50 kg propane  x <u> 1000 g </u> x <u>  1 mole propane   </u>  x <u>  2220 kJ  </u>   
                                     1 kg              44.1 g                     1 mole

= 729,931.97 kJ
8 0
3 years ago
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