CAN U JUST HELP ME PLS I NEED DESPERATE HELP. HELPPPP JUST PLS DO, IF U DON’T KNOW DON’T ANSWER :/

Answer:

Explanation:...

Answer:

Average speed  = 68 mph

Explanation:

Given that,

Total distance traveled by the family, d = 340 miles

The family traveled 5 hours southeast.

We need to find her average speed. The speed of an object is given by the total distance covered divided by time taken. So,

[tex]v=\dfrac{d}{t}[/tex]

Put all the values,

[tex]v=\dfrac{340}{5}\\\\v=68\ mph[/tex]

So, her average speed is equal to 68 mph.

Answer:

2. bubbles when acid is placed on it.

Explanation:

Minerals can be defined as any form of naturally occurring, inorganic solid substance characterized by a crystal structure. Also, minerals are homogeneous in nature with a defined chemical composition and characterized by a crystal structure comprising of ions, atoms, or molecules in an orderly arrangement.

Generally, molecules attach on the inside of a mineral to give it shape. Therefore, the molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.

Due to the fact that these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.

Additionally, inorganic-crystalline substances which are found naturally within earth are referred to as minerals. Some examples of minerals are iron, copper, aluminum, tin, coal, quartz, feldspar, mica, etc.

The chemical composition or property of a mineral reflect the presence and arrangement of atoms in each. Also, it determines the color and density of a mineral.

In Science, the chemical property of a mineral is evident if the mineral produces a bubble when an acid such as hydrochloric acid (HCl) is placed on it.

Answer: 2

Explanation:

Because the acid bubbles help the mineral break down

Answer: 103.6 g

Explanation:

On CK-12

Answer:

100 g

Explanation:

Primero hay que calcular el número requerido de moles de NaOH, usando la definición de molaridad:

Ahora hay que convertir 2.5 moles de NaOH en gramos, usando su masa molecular:

Se requieren 100 gramos de NaOH.

Answer:

D. Between mountain ranges

Explanation:

Usually in between mountains is where the most grass is.

Answer:

in the interior of continents

Explanation:

Answer:

n = 3

l = 0, 1, or 2

m_l = -2, -1, 0 , 1 or 2.

m_s = +½ or -½

Explanation:

The atomic number of manganese is 25 and as such it's electron configuration is;

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

The circled electron is part of the 5 electrons in the 3d orbital.

In this place, the main energy level which is the principal quantum number is n = 3 while the azimuthal quantum number is l = 2.

Thus,l can either be 0, 1, or 2

Now; if l = 0, then it means ml = 0

if l = 2, then it means the magnetic quantum number m_l from - l to + l could be -2, -1, 0 , 1 or 2.

Also, we know that the spin quantum number m_s could be +½ or -½

Answer:

Fe18C2?

not sure

Answer:

HClO₃ /chloric acid /suffix -ic/ ClO₃⁻ (chlorate)

HClO₂/ chlorous acid/ suffix -ous/ ClO₂⁻ (chlorite)

HNO₃ /nitric acid /suffix -ic/ NO₃⁻ (nitrate)

HNO₂/ nitrous acid/ suffix -ous/ NO₂⁻ (nitrite)

Explanation:

Chlorine has 4 positive oxidation numbers to form oxyacids: +1, +3, +5 and +7.

Nitrogen has 2 positive oxidation numbers to form oxyacids: +3 and +5.

Answer:

When the concentration of a reactant increases, there will be more chemical present. Due to more reactant particles moving together, more collisions are allowed to happen and with that, the rate of the reaction is increased. So, the higher the concentration of reactants, the faster the reaction rate will be.

Hope this helped you! :)

Answer:

Red, orange, yellow, green, blue, indigo, violet.

Explanation:

Answer:

Red, orange, yellow, green, blue, purple, violet.

Explanation:

Answer:

The molar mass of water is 18 grams per mole. So in 18 grams of water, there are 6.02 x 1023 molecules.

One gallon of water is equal to 3.7854118 liters. If we assume that the water is at 4 °C (to keep things simple), the density of water is exactly 1 gram per milliliter, or 1 kilogram per liter. So 1 gallon of water at 4 °C weighs exactly 3.7854118 kilograms, or 3785.41118 grams.

If one mole of water weighs 18 grams, then there are 210.30 moles of water in a gallon. Since one mole of water is made up of 6.02 x 1023 molecules, in one gallon of water there are 1.266 x 1026 molecules.

That is: 126600000000000000000000000 molecules!

If we multiply that by the number of atoms in a single water molecule -- 3 atoms -- then we get:

379800000000000000000000000 atoms!

The number of ionized water molecules at any given time in 2.86 gallons of pure water is approximately 2.08 x 10¹¹ molecules.

In pure water, only a small portion of water molecules are capable of self-ionization, which causes them to separate into hydronium ions (H3O+) and hydroxide ions (OH-). This procedure can be reversed.

The self-ionization of water can be represented as:

H₂O ⇌ H₃O+ + OH⁻

The concentration of each ion can be calculated using the equilibrium constant for water, Kw.

Kw = [H₃O⁺][OH⁻] = 1.0 x 10⁽⁻¹⁴⁾ at 25°C

Since the concentration of H³O⁺ ions is equal to the concentration of OH⁻ ions in pure water, let's assume that each concentration is x.

So, x² = 1.0 x 10⁽⁻¹⁴⁾

Taking the square root of both sides,

x = √(1.0 x 10⁽⁻¹⁴⁾)

  ≈ 1.0 x 10⁽⁻⁷⁾ M

The concentration of H₃O⁺ and OH⁻ ions in pure water is approximately 1.0 x 10^(-7) M.

To find the number of  ionized water molecules,

= concentration x Avogadro's number x volume

= (1.0 x 10⁽⁻⁷⁾ M) x (6.022 x 10²³ molecules/mol) x (2.86 gallons) x (3.78541 liters/gallon)

≈ 2.08 x 10¹¹ molecules.

So, approximately 2.08 x 10¹¹ molecules of water are ionized.

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Answer:

The balloon would deflate

Explanation:

Answer:

I’m pretty sure it’s C

Explanation:

AP Ex

Answer:

a) Superficial fluid

b)  5.9*10^-2 atm

c) Gas

d) Liquid

e) Solid

Explanation:

a)  At temperatures above 405.5 K and pressures above 111.5 atm, NH3 is a superficial fluid because liquid and gases does not exit at temperature and pressure greater than  405.5 K and  111.5 atm

b) NH3 does not exist as a liquid at pressures below  5.9*10^-2 atm , That is below the triple point there is existence of liquid

c)  NH3 is a Gas at 5.90×10^-2 atm and 249.5 K.

d) NH3 is a  Liquid  at 1.00 atm and 236.0 K. because pressure and temperature ( standard ) is between the given normal melting and boiling point

e) NH3 is a solid at 24.6 atm and 185.6 K . because the pressure here is more than that of triple point while the temperature is lesser

To make 200 mL of a 10% by volume solution, add 20 mL corn syrup to water.

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Answer:

B

Explanation:

Double Covalent bonds or as you say "binary" bonds consists of 2 non-metals only, nothing else.

Hope this helps!

Answer: -property

Explanation: Transparency is a property  of matter.

Answer: property i think

Explanation:

Answer:

B. the resonance hybrid of all structures

Explanation:

The idea of resonance is used to explain bonding in compounds where a single structure does not fully account for all the bonding interactions in a molecule.

A number of equivalent structures are then used to show the nature of bonding in such a molecule. Such structures are called resonance structures or canonical structures. None of these structures individually offer a holistic explanation to the bonding interactions in the molecule under study.

However, a hybrid of all the canonical structures does explain the nature of bonding in the molecule.

Answer:

B. the resonance hybrid of all structures

Explanation:

When a species can be represented by two or more resonance structures, the actual representation of bonding in the species is given by: the resonance hybrid of all structures

Answer:

V = 0.104 m³

Explanation:

Given that,

Number of moles, n = 7.70 moles

Pressure, P = 202.6 kPa

Temperature, T = 59.0°C = 332 K

We need to find the volume of the container that the gas. We know that the ideal gas law is as follows :

[tex]PV=nRT\\\\V=\dfrac{nRT}{P}[/tex], R =8.314 m³-Pa/K-mol

Put all the values,

[tex]V=\dfrac{7.7\times 8.314\times 332}{202.6 \times 10^3}\\\\V=0.104\ m^3[/tex]

So, the volume of the container is equal to 0.104 m³.

Answer:

[tex][H^+]=1.78x10^{-8}M[/tex]

Explanation:

Hello there!

In this case, according to the given information about the pH, it is firstly necessary for us to remember that the pH is defined as the potential of the hydrogen ions in the solution and the concentration of those ions represents how many of them are present in the solution; in such a way, it is possible for us use:

[tex]pH=-log([H^+])[/tex]

Whereas the concentration of hydrogen ions can be calculated as follows:

[tex][H^+]=10^{-pH}[/tex]

So we plug in the given pH to obtain:

[tex][H^+]=10^{-7.75}=1.78x10^{-8}M[/tex]

Regards!

Answer:

The right answer is "16.67 mL".

Explanation:

Given:

Molarity of NaOH,

[tex]M_1=6 \ M[/tex]

[tex]M_2=0.2 \ M[/tex]

Volume of NaOH,

[tex]V_1=V \ mL[/tex]

[tex]V_2=500 \ mL[/tex]

As we know, the equation,

⇒ [tex]M_1V_1=M_2V_2[/tex]

On putting the values, we get

⇒ [tex]6\times V=0.2\times 500[/tex]

⇒ [tex]6\times V=100[/tex]

⇒        [tex]V=\frac{100}{6}[/tex]

⇒            [tex]=16.67 \ mL[/tex]      

Answer:

[tex]m_P=4.75x10^{19}g\ P[/tex]

Explanation:

Hello there!

In this case, according to the given atoms of phosphorous, it is possible to calculate the mass of those atoms by bearing to mind the definition of mole in terms of the Avogadro's number; which refers to the mass and amount of particles in one mole of any element as equal to the atomic mass and the Avogadro's number respectively:

[tex]1 molP=6.022x10^{23}atoms\ P=30.97gP[/tex]

Which is used to obtain the required mass of P:

[tex]m_P=9.23x10^{41}atoms\ P*\frac{30.97g P}{6.022x10^{23}atoms\ P}\\\\m_P=4.75x10^{19}g\ P[/tex]

Regards!

Answer:

12 L of O₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CS₂ + 3O₂ —> CO₂ + 2SO₂

From the balanced equation above,

3 L of O₂ reacted to produce 1 L of CO₂.

Finally, we shall determine the volume of O₂ required to produce 4 L of CO₂. This can be obtained as follow:

From the balanced equation above,

3 L of O₂ reacted to produce 1 L of CO₂.

Therefore, xL of O₂ will react to produce 4 L of CO₂ i.e

xL of O₂ = 3 × 4

xL of O₂ = 12 L

Thus, 12 L of O₂ is needed for the reaction.

Answer:

[tex]c=0.133\ J/g^{\circ}C[/tex]

Explanation:

Given that,

Heat required, Q = 512 J

Mass of the substance, m = 255 g

The change in temperature, [tex]\Delta T=15^{\circ} C[/tex]

Let c be the specific heat of the substance. We know that the heat required to raise the temperature is given by :

[tex]Q=mc\Delta T[/tex]

Where

c is the specific heat of a substance

So,

[tex]c=\dfrac{Q}{m\Delta T}\\\\=\dfrac{512}{255\times 15}\\\\c=0.133\ J/g^{\circ}C[/tex]

So, the specific heat of the substance is equal to [tex]0.133\ J/g^{\circ}C[/tex].

Answer:

51.1 g NH3

The required chemical reaction is given by:

N2 + 3H2 --> 2NH3

4.5 mol H2 × (2 mol NH3/3 mol H2) = 3 mol NH3

molar mass of NH3 is 17.031 g/mol

3 mol NH3 × (17.031 g NH3/1 mol NH3) = 51.1 g NH3

Answer:

173.5 g

Explanation:

This question seems incomplete, as the power by which 10 is increased is missing. I will answer this question assuming the given number of molecules is 7.03x10²³ molecules. A different number of molecules will give a different answer, but the procedure remains the same.

First we convert the given number of molecules into moles, using Avogadro's number:

Then we convert magnesium nitrate moles into grams, using its molar mass:

Answer:

The correct solution is "93.48 M".

Explanation:

According to the question,

The number of moles of NaOH will be:

= [tex]0.753\times 38.5[/tex]

= [tex]28.99 \ mol[/tex]

The number of moles of needed [tex]H_2SO_4[/tex] will be:

= [tex]\frac{1}{2}\times 28.99[/tex]

=  [tex]14.49 \ mol[/tex]

hence,

The concentration of [tex]H_2SO_4[/tex] solution will be:

= [tex]\frac{Number \ of \ moles}{Volume \ of \ solution}[/tex]

= [tex]\frac{14.49}{0.155}[/tex]

= [tex]93.48 \ M[/tex]

Answer:

0.125 moles of solute

Explanation:

The formula for molarity (M) is moles of solute/liters of solution. First, convert 250 mL into liters:

250 mL/1 * 1 L/1000 mL = 0.25 L.

Then, plug in the values of m/L = M

m/0.25 = 0.5

Solve for moles (m). You would multiply 0.5 by 0.25.

m = 0.125

Lastly, if you'd like to check it and see if it's correct, do 0.125/0.25, and you should get 0.5 M.

Answer:

[tex]\boxed {\boxed {\sf 0.125 \ mol }}[/tex]

Explanation:

Molarity is a measure of concentration. It is the moles of solute per liters of solution.

[tex]molarity = \frac{ moles \ of \ solute}{ liters \ of \ solution}[/tex]

We know the solution has a molarity of 0.5 M or moles per liter. There are 250 milliliters of solution. First, we need to convert to liters. 1 liter is equal to 1000 milliliters.

Now we can substitute the values we know into the formula.

[tex]0.5 \ mol/L= \frac{ x}{0.25 \ L}[/tex]

Since we are solving for the moles of solute, we need to isolate the variable x. It is being divided by 0.25 L. The inverse of division is multiplication. Multiply both sides by 0.25 L.

[tex]0.25 \ L *0.5 \ mol/L= \frac{ x}{0.25 \ L}*0.25 \ L[/tex]

[tex]0.25 \ L * 0.5 \ mol/L =x[/tex]

[tex]0.25 * 0.5 \ mol=x[/tex]

[tex]0.125 \ mol =x[/tex]

0.125 moles of sodium phosphate are needed to make 250 mL of a 0.50 M solution.

Answer:

B) Gas A has twice the molar mass of Gas B.

Explanation:

Partial pressure of a gas is defined as the moles of the gas/ Total moles of the mixture times total pressure. The equation is:

Partial pressure A = Moles A / total moles * Total pressure

From the definition, we can say that the moles of the gas A are twice the moles of B:

2 Moles A = Moles B

As the mass of both gases is the same but the moles of B are twice the moles of A:

The molar mass of A is twice the molar mass of B

Right answer is:

We have that for the Question " what do we know about the gases?"

It can be said that

From the question we are told

5.00 g of Gas A and 5.00 g of Gas B are mixed in the same container, and the partial pressure of Gas B is determined to be twice that of Gas A

The equation for partial pressure gasA and gasB is given as

[tex]Partial Pressure = \frac{number of moles of }{Total no of moles of gas}[/tex]

That results to,

[tex]\frac{Partial pressure of A}{Partial pressure of B} = \frac{no of moles of A}{no of moles of B}[/tex]

[tex]= \frac{Given mass A}{Molar mass A} * \frac{Molar mass B}{Given mass B}\\\\= \frac{1}{2} = \frac{5*M_B}{M_A*5}\\\\= \frac{1}{2} = \frac{M_B}{M_A}\\\\= M_A = 2M_B[/tex]

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