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Llana [10]
3 years ago
13

1. If in the following diagram the substance is in solid form during stage 1, at what stage do the particles have no intermolecu

lar bonding?
(THERE IS A PIC AND IT'S THE FIRST ONE!!!)
1
3
5
Intermolecular bonding occurs during all stages.
2. Which of the following equations is not balanced?

N2 + 3H2 → 2NH3
MgI2 + Br2 → MgBr2 + I2
KClO3 → KCl + O2
HCl + NaOH → NaCl + H2O
3. In the alpha decay of Polonium-218, what daughter element is produced?
(PIC IS PIC 2)
4. Using the general equation above for a nuclear reaction, supply the following answer:
(PIC IS PIC 3)
There are (96,146,242) curium neutrons.

Chemistry
2 answers:
natima [27]3 years ago
6 0
1. Stage 5 (Gas). 2. The 3rd equation is not balanced. There are only 2 Os on the right side of the equation whereas there were 3 Os on the left side.3. The correct answer is the 3rd option (214, 82 Pb)4. There are 146 curium neutrons.
Mama L [17]3 years ago
6 0

Answer:

the answer is 5

Explanation:

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gayaneshka [121]

In all atoms, the number of protons and the number of electrons is always the same. The number of neutrons is very roughly the same as the number of protons, but sometimes it's rather more. The number of protons in an atom is called the atomic number and it tells you what type of atom you have.

6 0
3 years ago
Read 2 more answers
Determina el grado de pureza de un marmol (CaCO3), si al descomponerse 125 g del mismo se desprenden 20 litros de dióxido de car
jarptica [38.1K]

Answer:

67.8%

Explanation:

La reacción de descomposición del CaCO₃ es:

CaCO₃ → CO₂ + CaO

<em>Donde 1 mol de CaCO₃ al descomponerse produce 1 mol de CO₂ y 1 mol de CaO.</em>

Usando la ley general de los gases, las moles de dioxido de carbono son:

PV = nRT.

<em>Donde P es presión (1atm), V es volumen (20L), n son moles de gas, R es la constante de los gases (0.082atmL/molK) y T es temperatura absoluta (15 + 273.15 = 288.15K). </em>Reemplazando los valores en la ecuación:

PV / RT = n

1atmₓ20L / 0.082atmL/molKₓ288.15K = 0.846 moles

Como 1 mol de CO₂ es producido desde 1 mol de CaCO₃, las moles iniciales de CaCO₃ son 0.846moles.

La masa molar de CaCO₃ es 100.087g/mol. Así, la masa de 0.846moles de CaCO₃ es:

0.846moles ₓ (100.087g / mol) = <em>84.7g de CaCO₃</em>

Así, la pureza del marmol es:

(84.7g de CaCO₃ / 125g) ₓ 100<em> = </em>

<h3>67.8%</h3>
7 0
3 years ago
31. calculate the amount of energy released as heat by the freezing of 13.3 g of a liquid substance, given that the substance ha
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From the calculations, the heat of fusion of the substance is 0.73 kJ

<h3>What is is the heat of freezing?</h3>

The heat of freezing is the energy released when the substance is converted from liquid to solid.

Now we know that the molar mass of the substance is 82.9 g/mol  hence the number of moles of the substance is;  13.3 g /82.9 g/mol  = 0.16 moles

Now the heat of fusion shall be;

H = 4.60 kj/mol * 0.16 moles

H = 0.73 kJ

Learn more about freezing:brainly.com/question/3121416

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2 years ago
Metallic bonding is possible because the electrons
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4 0
3 years ago
A grapefruit has a weight on earth of 4.9 newtons. what is grapefruit's mass
Kobotan [32]
The force of gravity is the force with which massively large objects such as the earth attracts another object towards itself. All objects of the earth exert a gravity that is directed towards the center of the earth. Therefore, the force of gravity of the earth is equal to the mass of the object times acceleration due to gravity.   

<span>F = ma </span>
<span>4.9N = m (9.8 m/s^2), note that N (newtons) = kg-m/s^2 </span>
m = 0.5 kg 
<span>The mass of the object is 0.5kg.</span>
7 0
3 years ago
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