Use your Counting Atoms Notes, Ionic and Covalent Bonding Notes, and a Periodic
Table to help you on this assignment. You may use a calculator if you need it.
Identify the coefficients and subscripts in the following formulas.
1) 3MgCl2 coefficient:
Subscript for Mg:
Subscript for Cl:
2) 4K2CO3 coefficient:
Subscript for K:
Subscript for C:
Subscript for O:
3) NaC2H3O2 coefficient:
Subscript for Na:
Subscript for C:
Subscript for H:
Subscript for

If the distance between Miami and Key Largo is 70 miles, this distance is equivalent to 112.65 kilometers.

Distance is the amount of space between two points, usually geographical points, usually (but not necessarily) measured along a straight line.

According to this question, the distance between Miami and Key Largo is 70 miles.

Miles and kilometers are both units of measurement for distance. The conversion factor is as follows:

1 mile = 1.609 kilometres

70 miles is equivalent to 70 × 1.609 = 112.65 kilometers

Therefore, the distance between Miami and Key Largo is 70 miles, this distance is equivalent to 112.65 kilometers.

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The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

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Answer:

2.63*10^23

Explanation:

1 mol rhodium = 102.91

44.8g/1 mol * 1 mol/ 102.91mol * 6.022*10^23/1 mol =

2.63*10^23

Answer:potassium is more reactive than Mg because both lie in the same group and the element potassium has more electropositivity than magnesium

Explanation:

I hope it will help you

Answer: B. Potassium(K)

Explanation:

The section that represents the phase of water with the highest kinetic energy is the gas phase or vapor phase.

Gas phase or vapor phase section is above the boiling point curve, which separates the liquid and gas phases. At this point, the temperature is at or above 100°C (at standard atmospheric pressure), and the kinetic energy of the water molecules is sufficient to overcome the intermolecular forces holding them in the liquid phase and escape into the gas phase. The gas phase has the highest kinetic energy because the water molecules in this phase are more widely separated and move more rapidly than in the liquid or solid phases. The gas phase is also characterized by the highest entropy or disorder, as the molecules are free to move in any direction and occupy a large volume. The section that represents the phase of water with the highest kinetic energy is  gas phase or vapor phase.

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Answer:

The answer is D if it's wrong let me know pls

The sentence best summarizes the law of conservation of mass is a) The total amount of mass does not change during a chemical reaction.

The law of conservation of mass states that in a chemical reaction the mass neither be created nor be destroyed.

for example :

CH₄   +    2O₂    ----->    CO₂   +   2H₂O

the mass of reactants is = 16 g + 64 g = 80 g

the mass of products is = 44 g + 36 g = 80 g

it is clear from the above that :

The mass of reactants = The mass of Products

Thus , The sentence best summarizes the law of conservation of mass is a) The total amount of mass does not change during a chemical reaction.

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Answer:

mass of water: 8.9 g

Explanation:

Hey there its simple:

mass of water: mass of cylinder with water filled - mass of empty cylinder

mass of water: 32 g - 23.1 g

mass of water: 8.9 g

Answer:

Yeah, it's B.

Explanation:

Homeostasis is when the body maintains a near constant internal environment.

ANSWER

EXPLANATION

When an organic compound is burns in air, the type of reaction is called a combustion reaction.

The major products formed when an organic compound undergoes a combustion reaction are carbon dioxide and water.

To write a balanced equation for the reaction, follow the steps below

The combustion formula is written below as

The compound given is pentane because it has 5 carbon atoms

Answer:

The answer is

Explanation:

Density = mass / volume

mass = density × volume

volume = 2cm³

density = 520g/cm³

mass = 2 × 520

= 1040g

Hope this helps you

For each compound, the states (aq) for aqueous, or dissolved in water, and (s) for solid, or precipitate created, are used to denote their states.

A mixture made up of a sodium nitrate solution and a copper(II) hydroxide precipitate is created when copper(II) nitrate and sodium hydroxide solutions are combined.

KOH and Cu(NO3)2 react, and the balanced equation for the reaction is

2KOH(aq) + Cu(NO3)2(aq) Cu(OH)2(s) + 2KNO3 (aq)

Copper(II) hydroxide (Cu(OH)2) and potassium nitrate are produced in this reaction between potassium hydroxide (KOH) and copper(II) nitrate (Cu(NO3)2) (KNO3).

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The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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From the calculation, there are 1.5 g of water produced in the reaction.

An equation shows the chemical transformation that takes place in a reaction vessel. In this case, the equation is; C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O.

Now;

Number of moles of glucose = 2.5g/180 g/mol = 0.014 moles

Since 1 mole of glucose produces 6 moles of water

0.014 moles of glucose produces 0.014 moles * 6 moles/ 1 mole

= 0.084 moles

Mass of water produced = 0.084 moles * 18 g/mol = 1.5 g of water

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There is a large amount of energy , Large atoms breaking up into two or more are depicted in the equation.

Equation :

    ²³⁵₉₂U        + ¹₀n       →    ¹⁴²₅₆Ba   +  ⁹¹₃₆Kr   + 3 ¹₀n

During a process known as nuclear fission, the nuclei of some atoms undergo decay by splitting into two smaller, more stable nuclei. Large atoms breaking up into two or more are depicted in the equation.

Sum of all charged particles' initial energies released per unit mass of material as a result of interactions with indirect ionizing radiation (primarily photons and neutrons).

When a neutron hits a larger atom, it causes it to swell, causing it to split into two smaller atoms, or fission products. Extra neutrons are likewise delivered that can start a chain response. A tremendous amount of energy is released when each atom splits.

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Answer:

The mass of silver is \(1.19\times 10^{14}\ Mg\)

Explanation:

Given that,

The volume of the truck is 402 cubic feet or 1.138 x 10⁷ mm.

The density of silver is 10.49 g/mL.

We need to find the mass of silver that will fit in this moving truck. Density equals mass divided by volume. So,

\(d=\dfrac{m}{V}\\\\\text{where m is mass}\\\\m=d\times V\\\\m=10.49\ g/mL\times 1.138 \times 10^7\ mL\\\\m=119376200\ g\)

1 gram = 10⁻⁶ Megagram

\(119376200=1.19\times 10^{14}\ Mg\)

Hence, the mass of silver is \(1.19\times 10^{14}\ Mg\)

Answer:

Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

Explanation:

Answer:

F= m x a

force = mass x acceleration

Explanation:

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased.

Answer:

The answer for the volume is approximately 524.4L

Step by Step Explanation:

P1V1/T1=P2V2/T2

Where P1=970torr

T1=25°C=273+25=298K

V1=3.5L

P2=X

T2=40°C=273+40=313K

V2=6.8L

P2=P1V1T2/V2T1

X=970×3.5×313/6.8×298

X=524.395L

X≈524.4L

The equilibrium constant of the reaction based on the data that we have is 3.46

The equilibrium constant's value contains crucial details about the proportions of reactants and products at equilibrium. As K exceeds 1, the reaction moves more in the direction of the products, showing that the reaction is product-favored.

We know that we have the reaction equation as;

A ⇔ B

Then we also have that the molar concentrations of A and B are 0.720 M and 2.490 M respectively. It then follows that;

Keq = [B]/[A]

Keq = 2.490 M /0.720 M

Keq = 3.46

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\(8.83\)cents

Explanation:

\((25 \times 4) + (5 \times 10) + (9 \times 1)\)

\( = > 159\) cents

Now,

\( \frac{159}{(4 + 5 + 9)}\)

\( = > \frac{159}{18} \)

\( = > 8.83\)

Hence, the average value of coins is \(8.83\)cents

Answer:

1.3 moles

Explanation:

pv = nrt

n = pv/rt

n = (125 * 25) / (8.3144598 * 289)

n = 1.3 moles

aC2H6 + bCO2 + cH2O → dC2H5OH The balanced equation for the reaction is given as; 6C2H6 + 2CO2 + 3H2O → 7C2H5OH, Check! Oxygen  Product = 7 Carbon Reactant = 6 * 2  +  2  = 14 Product = 7 * 2 =14 Hydrogen d = 7.

The manner that chemical equations are written ensures that almost all of the molecules are visible.Each oxygen molecule contains two oxygen atoms, which is why the symbol for it is [2].Recall that only two oxygen atoms make up each diatomic oxygen molecule that we breathe.

Oxidation processes, addition reactions, substitution reactions, and combustion reactions are the four basic types of reactions in which carbon is primarily involved.When carbon burns with oxygen present, heat and light are produced.

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Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

3.3 × 10²³ molecules Cu(NO₃)₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

0.55 mol Cu(NO₃)₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

3.3121 × 10²³ molecules Cu(NO₃)₂ ≈ 3.3 × 10²³ molecules Cu(NO₃)₂