This formula equation is unbalanced.

P4(s) + Cl2(g) Right arrow. PCl3(l)

Which coefficient should be placed in front of PCl3 to balance this equation?
1
2
4
6

Answer:

Honey

Explanation:

i know why but at the same time i don't. i know that water, tea, and milk are very fluid however honey is sticky and isn't AS FLUID as the others.

Therefore, honey as the highest viscosity.

Answer:

The force must be in the same direction as the object’s motion

Explanation:

Force is a physical quantity.

It is defined as the force applied to a body to move it in the direction of the force applied.

  Force  = mass x acceleration.

So, option is C is the correct choice.

Answer:

The answer is number 1

Explanation:

this is because cease means to stop,and recession also means to squeeze

Answer:

build better enclosures to decrease overgrazing by livestock.

Explanation:

Answer:

It decreases first and then remains constant.

Explanation:

Answer:

It decreases first and then remains constant.

Explanation:

Crystallisation

(used to separate solids from a solution)

Hope this helps!

Answer:

I think its 32 electrons

Explanation:

im so sorry if im wrong!

Answer:

32 electrons :)

Explanation:

A 65.0 g sample of copper at 97.6 °C is added to 46.1 g of water at 20 °C, reaching a final temperature of 24.9 °C.

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.

A 65.0 g (m) sample of copper is cooled from 97.6 °C to 24.9 °C. Given that its specific heat (c) is 0.20 J/g.°C, we can calculate the heat (Q) lost using the following expression.

Q(Cu) = c(Cu) × m(Cu) × ΔT

Q(Cu) = (0.20 J/g.°C) × 65.0 °C × (24.9 °C - 97.6 °C) = -945 J

We will use the law of conservation of energy.

Qw + Q(Cu) = 0

Qw = -Q(Cu) = 945 J

We will use the same expression as in Step 1.

Qw = c(w) × m(w) × ΔT

m(w) = Qw / c(w) × ΔT

m(w) = 945 J / (4.18 J&g.°C) × (24.9 °C - 20 °C) = 46.1 g

A 65.0 g sample of copper at 97.6 °C is added to 46.1 g of water at 20 °C, reaching a final temperature of 24.9 °C.

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Answer:

a reaction in which one element is substituted for another element in a compound

Explanation:

Answer:

Take the weighted average of the individual isotopes.

Explanation:

63

C

u

has

69.2

%

abundance.

65

C

u

has

30.8

%

abundance.

So, the weighted average is

62.93

×

69.2

%

+

64.93

×

30.8

%

=

63.55

amu

.

If we look at the Periodic Table, copper metal (a mixture of isotopes but

63

C

u

and

65

C

u

predominate) has an approximate atomic mass of

63.55

g

⋅

m

o

l

−

1

, so we know we are right.

Answer:

Number of valence electrons = Group number of the element on the periodic table.

Explanation:

Hope that helps ^^

Density, Melting point, Boiling point and Hardness  are examples of physical properties.

A physical property refers to that property which is measurable and whose value indicates a state of a physical system. Examples of physical properties are Density, Melting point, Boiling point and Hardness so we can conclude that Density, Melting point, Boiling point and Hardness  are examples of physical properties.

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72.06 grams is the mass of produced H₂O in the given reaction.

Mass of any substance can be calculated by using moles as:

n = W/M, where

W = required mass

M = molar mass

Given chemical reaction is:

NH₄NO₃ → N₂O + 2H₂O

From the stoichiometry of the reaction it is clear that:

1 mole of NH₄NO₃ = produce 2 mole of H₂O

Given mass of NH₄NO₃ = 160.1 g

Molar mass of NH₄NO₃ = 80.03 g/mole

Mole of NH₄NO₃ = 160.1 g / 80.03 g/mole = 2 moles

2 moles of NH₄NO₃ = produce 2 × 2 = 4 moles of H₂O

Molar mass of H₂O = 18.01 g/mol

So, required mass of H₂O will be calculated as:

W = 4mol × 18.01 g/mol = 72.06 grams

Hence, 72.06 grams is the mass of H₂O.

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Answer: No, the speed of propagation is constant in a given medium; only the wavelength changes as the frequency changes.

Explanation:

Answer:

A-20 B-40 C-Ca D-10 E-9 F-F

Explanation:

Answer:

boiling have an effect while freezing so not

Answer:

0.55

Explanation:

When multiplying values, the number of significant figures in the answer should be the same as the number with the lowest sig figs in the problem which in this case is 2 sig figs (0.17)

3.22 * 0.17 = .5474

Rounded to 2 sig figs = 0.55

Answer:

In general, anions are larger than the corresponding neutral atom, since adding electrons increases the number of electron-electron repulsion interactions that take place. Cations are smaller than the corresponding neutral atoms, since the valence electrons, which are furthest away from the nucleus, are lost.

Explanation:

The ion S⁻² (sulfide ion) is larger than the atom S (sulfur atom).

b. S⁻²

Atoms are composed of a nucleus at the center, containing protons and neutrons, and a cloud of electrons surrounding the nucleus. The size of an atom is determined mainly by the arrangement and energy levels of its electrons.

When an atom gains electrons to become an ion, it undergoes a process called electron gain or electron attachment. In this case, sulfur (S) has six valence electrons (electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁴). It tends to gain two electrons to achieve a stable electron configuration similar to the nearest noble gas, argon (Ar: 1s² 2s² 2p⁶ 3s² 3p⁶). By gaining two electrons, sulfur forms the sulfide ion (S⁻²), which has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶.

When an atom gains electrons to become an ion, it forms a negatively charged ion, and this is the case for S⁻². The extra electrons in the ion's electron cloud cause repulsion, leading to an increase in the ion's size compared to the neutral atom. In other words, the addition of two extra electrons in the S⁻² ion increases its electron cloud's size, making it larger than the S atom.

Learn more about sulfide ion from the link given below.

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Explanation:

yup you are right. The answer is 2,3- Dimethyl butane

Complete combustion of an alkane (methane)

You're essentially burning CH4 in the excess presence of oxygen gas, which results in the liberation of water and carbon dioxide

Answer:

D

Explanation:

I am sorry if wrong

Answer:

C

Explanation:

I tested the other answer and it was wrong, when I put C I got 100... Your welcome!

Answer:

it's 12.10

Explanation:

pH is the potential of hydrogen ions. pOH is the potential of hydroxide ions. The pOH of this solution is 12.10.

pH is the potential of hydrogen ions. pOH is the potential of hydroxide ions.

It is a scale used to determine the solution's hydrogen ion ( H⁺ ) concentration. It is a scale used to determine the solution's hydroxide ion ( OH⁻ ) concentration.

The difference between the two is that [OH-] represents the concentration of [OH-] or the molarity of OH-. It basically represents the concentration of OH- that is produced when a strong base reacts with water for example. pOH is a value that represents the basicity of a solution.

pH + pOH = 14

1.90 + pOH =14

pOH = 14 - 1.90

pOH = 12.10

Thus, the pOH of this solution is 12.10.

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From the calculations, the specific heat capacity of diamond is 42.36  J/Kg/°C.

The specific heat capacity is the heat absorbed or emitted when 1Kg of a susbtance is heated such that its temperature is increased by 1 K.

Now;

Mass of water = 26.05 g or 0.026 Kg

Mass of diamond = 2.05 g or 0.00205 Kg

specific heat capacity of water = 4200 J/Kg/°C

specific heat capacity of diamond = ?

Initial temperature of water =  27.20°C

Initial temperature of diamond =74.21 °c

Final temperature of the diamond and water = 27.65 °c

Heat lost by diamond = heat gained by water

mcdT = mcdT

0.00205 Kg * c * ( 74.21 °c - 27.65 °c ) = 0.026 Kg * 4200 J/Kg/°C * (27.65 °c - 27.20°C)

0.116c = 4.914

c = 4.914/0.116

c = 42.36  J/Kg/°C

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Answer:

Au = Element

NaCl = Compound

Salad = Heterogeneous

NaCl & Water = Homogeneous