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3 years ago

An element has the following subatomic particles: 8 protons, 8 neutrons, 8 electrons. What element is it?

Chemistry

2 answers:

Marina86 [1]3 years ago

8 0

Oxygen is the answer. it has 8 neutrons and 8 electrons as well as 8 protons.

Yuliya22 [10]3 years ago

3 0

The answer to your question is oxygen

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You need to prepare an acetate buffer of pH 5.36 from a 0.900 M acetic acid solution and a 2.62 M KOH solution. If you have 680

Alexus [3.1K]

Answer:

Explanation:

pH = pKa + log [ CH₃COO⁻ ] / [CH₃COOH ]

5.36 = 4.86 + log [ CH₃COO⁻ ] / [CH₃COOH ]

log [ CH₃COO⁻ ] / [CH₃COOH ] = .5

[ CH₃COO⁻ ] / [CH₃COOH ] = 3.16

moles of CH₃COOH = .680 x .9 = .612 M

Let x mole of KOH is required

x /( .612 - x ) = 3.16

x = 1.933 - 3.16 x

x = .46488

.46488 moles of KOH will be required

volume required be V

v x 2.62 = .46488

v = .1774 L

= 177.4 mL

177.4 mL of 2.62 M KOH will be required .

6 0

3 years ago

Which could describe the motion of an object? distance = 1 meter and displacement = 10 meters distance = 10 meters and displacem

Tcecarenko [31]

Answer:

Distance = 10 meters and displacement = 10 meters

6 0

3 years ago

Read 2 more answers

How many electrons will the lithium atom give up to become stable?

Angelina_Jolie [31]

Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)

8 0

3 years ago

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Toluene, C7H8, is used in the manufacture of explosives such as TNT (trinitrotoluene). A 1.500 g sample of liquid toluene was pl

dusya [7]

Answer:

There were 63.67 kJ liberated

If 1 mol of toluene was burned, there would be liberated 3906 kJ / mole

Explanation:

Step 1: Data given

Mass of the toluene sample = 1.500 grams

The temperature of the calorimeter rose from 25.000 °C to 26.413 °C

Write the balanced chemical equation for the reaction in the calorimeter.

C7H8(l) + 9O2(g) ⇒ 7CO2(g) + 4H2O(l)

Step 2: Calculate Q of the calorimeter

Q = C * Δt

Q = 45.06 kJ/ °C * ( 26.413 - 25)

Q = 63.67 kJ

Step 3: Calculate moles of toluene

Moles toluene = mass toluene / molar mass toluene

Moles toluene = 1.500 grams /92.14 g/mol

Moles toluene = 0.0163 moles

Step 4: Calculate energy per mole

energy per mole = 63.67 kJ / 0.0163 moles = 3906 kJ / mole

6 0

4 years ago

1) These are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

UNO [17]

The correct answer is "Centioles"

8 0

3 years ago