WILL GIVE 50 points I can’t get on to the website so plz help.

Answer:

Sperm Cell

Explanation:

Answer:

234.68g

Explanation:

We understood from Avogadro's hypothesis that 1mole of any substance contains 6.02x10^23 atoms. Therefore, 1mole of Fe2O3 also contains 6.02x10^23 atoms

1 mole of Fe2O3 = (56x2) + (16x3) = 112 + 48 = 160g

Now, if 160g of Fe2O3 contains 6.02x10^23 atoms,

Therefore Xg of Fe2O3 will contain 8.83×10^23 atoms i.e

Xg of Fe2O3 = (160x8.83×10^23)/6.02x10^23 = 234.68g

Answer:

97.7 kJ

Explanation:

We'll use the formula for specifc heat: Q=mcΔT

Q= heat/energy (Joules), m= mass (grams), c= specific heat (different for each substance and is usually given)

ΔT= final temperature - initial temperature

Let's check our given units and see if they're the correct, here they all are. Let's plug in what we know.

Q=mcΔT

Q=(480)(0.96)(234 - 22)

Q=(480)(0.96)(212)

Q= 97,690 J

Before we submit an answer, let's check out units. We have our answer in Joules, but we want it it kilojoules, so we'll convert it knowing that:

1000 Joules = 1 kilojoule

97,690J x [tex]\frac{1 kJ}{1000J}[/tex] = 97.7kJ

Explanation:

the answer and the working out is shown above.

Answer:

64.6% of Br and 35.4% of Sr

Explanation:

The percentage composition is obtained defining the percentage in mass of each atom in a molecule.

To solve this question we must find the mass of each atom in 1 mole:

Molar mass Br: 79.904g/mol

Molar mass Sr: 87.62g/mol

The molar mass of SrBr2 is:

79.904g/mol*2 + 87.62g/mol =

159.808g/mol + 87.62g/mol =

247.428g/mol

The percentage of Br is:

79.904g/mol*2 = 159.808g/mol / 247.428g/mol * 100

= 64.6% of Br

And percentage of Sr is:

87.62g/mol / 247.428g/mol * 100

= 35.4% of Sr

Answer: B

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Answer:

Landslides, Volcanoes, Earthquakes, and Floods. A opening in the Earth's surface through which melted rock, gases, and ash escape. Events in which molten rock spews out from the mantle to the surface of Earth as ash, lava, and gases

Explanation:

Answer:

the answer to this is 74 :)

Answer:

As nouns the difference between impression and imprint

is that impression is the indentation or depression made by the pressure of one object on or into another while imprint is an impression; the mark left behind by printing something.

The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.

The difference between an imprint and an impression is that the imprint is the mark left behind when anything is printed, whereas the impression is the indentation or depression caused by the pressure of one object against or into another.

While a shoe won't make an impression in loose sand, it will on a hard surface like concrete or linoleum. These imprints or impressions might be contrasted with the shoe of a suspect or the tire of a car to see if they belong to the same object.

Thus, The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.

To learn more about the imprint and the impression, follow the link;

https://brainly.com/question/20410964

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Answer:

3 moles of calcium oxide are formed

Explanation:

Based on the reaction of Calcium Ca, with oxygen, O₂, to produce calcium oxide, CaO is:

2Ca + O₂ → 2CaO

where 2 moles of calcium produce 2 moles of Calcium oxide.

That means, if 3 moles of Ca react in presence of oxygen:

3 moles of calcium oxide are formed

Answer:

A metallic bond is a force of attraction between charged metal ions and the electrons that are in the delocalized bond, which covers the assembly of ions. A covalent bond is the force of attraction between the nuclei of atoms, and the electrons shared between them.

Explanation:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond can be generated by electrostatic attraction between charged ions (for example, ionic bonds) or by electron sharing (for example, covalent bonds).

I hope this helps you :)

Answer:

hydrogen bonding

Explanation:

Dipole-Dipole, Dispersion, hydrogen bonding and ion bond

Answor

c                                              

Explanation:

Answer:

mesosphere

I hope this helps a little bit.

Answer:

Zinc blend is Zinc sulphide, ZnS.

ZnS is roasted in air producing ZnO and Sulphur dioxide.

ZnO is reduced to Zn by CO.

Further purification is done by electrolysis.

Answer: [tex]3.903\times 10^{23}[/tex]

Explanation:

Given

Mass of magnesium is [tex]m=15.75\ gm[/tex]

The molar mass of magnesium [tex]M=24.3\ g/mol[/tex]

No of moles in 15.75 g of magnesium is

[tex]\Rightarrow n=\dfrac{15.75}{24.3}\\\\\Rightarrow n=0.648\ \text{moles}[/tex]

1 mole contains [tex]6.022\times 10^{23}[/tex] atoms

So, 0.648 moles contain [tex]0.648\times 6.022\times 10^{23}[/tex]

[tex]=3.903\times 10^{23}\ \text{atoms}[/tex]

Answer:

c

Explanation:

boiling

Answer:

Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food.

Answer: OCl2 is polar because the two O-Cl bond dipoles don't cancel each other.

Answer:

You transfer kinetic energy from you foot to the ball.

Explanation:

Energy cannot be created or destroyed.

Answer:

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Answer:

Boiling

Explanation:

c.boiling

choice number 3

Answer:

"1 M" will be the right solution.

Explanation:

The given values are:

Number of moles,

= 2 moles

Volume of solution,

= 2000 mL

or,

= 2 L

Now,

The molarity of the solution will be:

=  [tex]\frac{Moles}{Liters}[/tex]

On substituting the values, we get

=  [tex]\frac{2}{2}[/tex]

=  [tex]1 \ M[/tex]

Answer:

You dial a number on your phone

Your phone contacts a base station

The base station contacts the MTSO

The MTSO connects you to the other device

You talk to the person on the other device.

Answer:

mass = 102.69 g of sucrose

Explanation:

First, you need to use the correct expression of molality (m) which is the following:

m = moles / kg solvent    (1)

According to the exercise, we need to get the grams, in other words, the mass of the sucrose. To get the mass, we need the moles and molecular weight of sucrose and use the following expression:

moles = mass / MM    (2)

Now, if we replace (2) in (1) we have:

m = mass / MM * kg solvent   (3)

From here, we solve for the mass and then:

mass = m * MM * kg solvent (4)

Now, then density of water is 1 kg/L, so, the volume of the water will be the same as it's mass, and the molality is 3 m. The molecular weight of the sucrose is (according to several sources) 342.3 g/mol. Replacing all the data in (4) we have:

mass = 3 mol/kg * 0.1 kg * 342.3 g/mol

Hope this helps

Respuesta:

1.50 moles

Explicación:

Paso 1: Escribir la ecuación química ajustada para la descomposición del carbonato de calcio

CaCO₃ ⇒ CaO + CO₂

Paso 2: Calcular los moles correspondientes a 150 g de CaCO₃

La masa molar de CaCO₃ es 100.09 g/mol.

150 g × 1 mol/100.09 g = 1.50 mol

Paso 3: Calcular los moles de CO₂ producidos a partir de 1.50 moles de CaCO₃

La relación molar de CaCO₃ a CO₂ es 1:1.

1.50 mol CaCO₃ × 1 mol CO₂/1 mol CaCO₃ = 1.50 mol CO₂

Answer:

Distance

Explanation:

Answer:

Exotic is something that’s is unique and you can only find it or this thing in some places. The answer is the rare type of flower.

Explanation: