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Answer:0.305g

Explanation:

mass = 79.9x(2.3 x 10^21) / (6.02 x 10^23)

= 0.305

Answer:

y

Explanation:

yea Mami you know like for real I feel you you know iam seeing but tomorrow I see the equation for the last works positive AAAAA

Answer:

A saturated solution is one where there are equal numbers of particles, or solutes, and solvent in the solution.

Explanation:

The characteristics of a solvent are that it can be a liquid, a solid, or a gas; although the solvent is usually a liquid. When a solution cannot have solute added and dissolved, the solution is saturated.

Explanation:

A saturated solution is one where there are equal numbers of particles, or solutes, and solvent in the solution

5 g of potassium oxalate react to produce 0.03 moles of calcium oxalate.

Calcium oxalate (CaC₂O₄) is obtained by the reaction of 5 g of potassium oxalate (K₂C₂O₄).

We can calculate the moles of CaC₂O₄ obtained considering the following relationships.

[tex]5 g K_2C_2O_4 \times \frac{1molK_2C_2O_4}{184.24gK_2C_2O_4} \times \frac{1molCaC_2O_4}{2molK_2C_2O_4} = 0.03molCaC_2O_4[/tex]

5 g of potassium oxalate react to produce 0.03 moles of calcium oxalate.

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Answer:

it's kcl

Explanation:

the kcl should be salt

Answer:

So oxidation reactions need not involve oxygen. This redox reaction is actually the sum of two separate half-reactions (a reduction half-reaction and an oxidation half-reaction).

The oxidation reaction does not require oxygen as a reactant. An atom, molecule, or ion loses one or more electrons during the chemical process of oxidation, increasing its positive charge.

When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.

A molecule is said to be oxidized when oxygen is added to it or when hydrogen is taken out of it. Reduction is the process of introducing hydrogen or removing oxygen from a molecule.

An element is oxidized if it loses electrons, which is another definition of oxidation. Any electron acceptor can oxidize an element by taking in the lost electrons, hence oxygen is not a necessary component in oxidation.

The process of converting glucose into ATP requires oxygen. For each glucose, the first step only releases two molecules of ATP.

Thus, The oxidation reaction does not require oxygen as a reactant.

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Answer:

2.258x 10 above 24 molecules

Explanation:

We use Avogadro's number of 6.022×1023 molecules per mole to calculate the number of molecules from the number of moles represented by 165 g of carbon dioxide.

The gram-molecular weight of carbon dioxide can be calculated from the atomic weights for carbon and oxygen (two of them in CO2) given in a Periodic Table of the Elements.

165 g CO244.01 g/mol×6.022×1023moleculesmol

=2.258×1024molecules

Answer:

166.704

Explanation:

neutrons=117

protons=78

Answer:

Platinum has mass number 195.

The atomic number of platinum =78

so the number of protons is 78.

By using simple formulas

we can find out that how many neutrons and protons are present in an atom of platinum-195.

Mass number = neutrons + protons

195=neutrons + 78

neutrons=195-78=117

so the number of neutrons is 117.

The dissolution of a substance in another is a kind of chemical reaction.0.4575 g of saccharine is present in the ten tablets of saccharine dissolved in water.

From the information in the question, the sulfur in saccharin (C7H5NO3S) was completely converted to sulfate ion (SO4^2-). This ion was now reacted with excess  barium chloride to form barium sulfate BaSO4. This later reaction occurs as follows;

SO4^2-(aq) + Ba^2+(aq) --------> BaSO4(s)

Number of moles of BaSO4 obtained = 0.5240 g/233 g/mol

= 0.0025 moles

Since the reaction is 1:1, 0.0025 moles of sulfate ions from saccharine reacted.

Molar mass of saccharine = 7(12) + 5(1) + 14 + 3(16) + 32

= 84 + 5 + 14 + 48 + 32 = 183 g/mol

Mass of saccharine in the tablet = 0.0025 moles × 183 g/mol

= 0.4575 g

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Explanation:

option B is the correct answer, 1.67g/mL.

hope this helps you.

Answer:

If you could miraculously remove two neutrons from an atom's nucleus, the atomic number and electrical charge would stay unaltered. Because neutrons have no electrical charge, adding or removing them from the nucleus has no effect on the nucleus's electrical charge. It does, however, alter the nucleus's mass. Isotopes are formed by adding or subtracting neutrons from the nucleus.

Answer:Me and my family went out and I fell into water and turnt into a water droplet and my family catches me in they hand and put fire

Explanation:

Answer:

25 + 273= 298k.

Explanation:

I guess it's correct answer

The equivalent Kelvin temperature is 298 K.

Temperature is defined as a measurement of an object's or substance's warmth or coolness in relation to a standard value.

It can also defined as the feature of matter that represents the amount of energy of motion of its constituent components.

Temperature scale is defined as a method of indicating or measuring temperature with respect to a beginning point (0 or zero) and a unit of measurement.

Temperature scale is also defined as a way of calibrating the physical quantity temperature in metrology.

Usually there is three types of temperature scale is used.

Thus, the equivalent Kelvin temperature is 298 K.

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Answer:

mechanical energy

Explanation:

Answer:

B.

Explanation:

Answer:

El sistema Dry-Fit funciona transportando la humedad a la superficie de la prenda, facilitando su evaporación. Comúnmente se utilizan materiales como el poliéster o microfibras de materiales sintéticos, ya que no absorben líquidos.

Explanation:

espero que te sirva

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.13 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.13}{6.02} \\ = 0.519933[/tex]

We have the final answer as

Hope this helps you

Objects would no longer be drawn toward each other, because there would be no sloping surface for them to fall down. Instead, they would fly off in whatever direction gravity was keeping them from going.

Answer:

All items in the universe, humans, objects, and the planets, would be floating around. Everything would become weightless.

The frequency of this line of vanadium  is 9.38 x10 ^14 Hz.

Emission spectrum shows how the electron of an atom goes or moves  from a higher to a lower energy level.

Now The energy of a photon is given by

E = hc/λ

where  

h = Plank's constant =  6.626 x 10⁻³⁴ J s

c = speed of light=   3 x 10⁸ m/s

λ = wavelength =  318.5  x 10⁻⁹ m  

Solving

E =  (6.626 x 10⁻³⁴ J s x 3 x 10⁸ m/s)  / 318.5  x 10⁻⁹ m

E =6.2166 x10 ^-19 J

Also, we know that energy is related to frequency by the equation

E =hf

Where;

h = Planks's constant

f = frequency of photon

Making frequency subject of the formulae

f = E/h

f =6.2166 x10 ^-19 J/  6.626 x 10⁻³⁴ J s

f =  9.38 x10 ^14 Hz

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Answer:

the ground of the building or supports

Explanation:

because that's what holds the building in place

Answer:

A. orqnges and bananas

B. Water and lemon juice

C. Air ( mixture of oxygen and nitrigen)

D. stones in water

E. smoke ( soot suspended in air)

F. coca cola ( Carbon dioxide dissolved in water)

Answer:

FeO

Explanation:

Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite. One of several iron oxides, it is a black-colored powder that is sometimes confused with rust, the latter of which consists of hydrated iron(III) oxide (ferric oxide).

Answer:

fg

Explanation:

The mass in grams of 3.011 x 10²³ atoms of F is 9.5 g.

The mass in grams of  1.50 x 10²³ atoms of Mg is 5.98 g.

The mass in grams of  4.50 x 10¹² atoms of Cl is 2.65 x 10⁻¹⁰ g.

The mass in grams of  8.42 x 10¹⁸ atoms of Br is 1.12 x 10⁻³ g.

The mass in grams of  25 atoms of W is 3.1 x 10⁻²¹ g.

The mass in grams of  1 atom of Au is 3.27 x 10⁻²² g.

The mass in grams of 3.011 x 10²³ atoms of F is calculated as follows;

6.023 x 10²³ atoms = 19 g of F

3.011 x 10²³ atoms F  = ?

= (3.011 x 10²³ x 19 g)/(6.023 x 10²³)

= 9.5 g

The mass in grams of  1.50 x 10²³ atoms of Mg is calculated as follows;

6.023 x 10²³ atoms = 24g of Mg

1.5 x 10²³ atoms F  = ?

= (1.5 x 10²³ x 24 g)/(6.023 x 10²³)

= 5.98 g

The mass in grams of  4.50 x 10¹² atoms of Cl is calculated as follows;

6.023 x 10²³ atoms = 35.5 g of Cl

4.5 x 10²³ atoms Cl  = ?

= (4.5 x 10¹² x 35.5 g)/(6.023 x 10²³)

= 2.65 x 10⁻¹⁰ g

The mass in grams of  8.42 x 10¹⁸ atoms of Br is calculated as follows;

6.023 x 10²³ atoms = 80 g of Br

8.42 x 10¹⁸ atoms Br = ?

= (8.42 x 10¹⁸  x 80 g)/(6.023 x 10²³)

= 1.12 x 10⁻³ g

The mass in grams of  25 atoms of W is calculated as follows;

6.023 x 10²³ atoms = 74 g of W

25 atoms W = ?

= (25  x 74 g)/(6.023 x 10²³)

= 3.1 x 10⁻²¹ g

The mass in grams of  1 atom of Au is calculated as follows;

6.023 x 10²³ atoms = 197 g of Au

1 atom of Au = ?

= (1  x 197 g)/(6.023 x 10²³)

= 3.27 x 10⁻²² g

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Answer:

the liquid becomes equal to the rate of condensation

Explanation:

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The vapor pressure of a liquid at a provided temperature is measured when the rate of evaporation of a liquid evolves equally to the rate of condensation.

Evaporation is the procedure by which water transforms from a liquid to a gas or vapor.

Evaporation is the primary route that water moves from the liquid circumstances around into the water cycle as atmospheric water vapor.

When a molecule around the surface absorbs adequate energy to overwhelm the vapor pressure, it will exit and join the surrounding air as a gas.

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Answer:

136.5886g of NH3

Explanation:

N2 + 3H2 = 2NH3

The mass of the N2 = 4.01

3H2 has a 2/1 ratio

This means the mass of 3H2 is twice as much as N2.

NH3= 2*N2 = 2*4.01 = 8.02 of NH3

Then, by multiplying the mass by MX (17.031)

8.02*17.031=136.5886g can be produced. Round it if needed.

Answer:

D. From the equator to cooler parts of Earth

Explanation:

Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature. Moving particles transfer thermal energy through a fluid by forming convection currents.

Answer:

B. From the surface of the ocean to the bottom

D. From the equator to cooler parts of Earth

Explanation:

Test approved

If the concentration of acetyl chloride  is increased ten times the rate of reaction is increased ten times.

The conversion of acetyl chloride to methyl acetate is a substitution reaction. Recall that a substitution reaction is one in which a moiety in a molecule is replaced by another.

In this reaction, the CH3O- ion replaces the chloride ion. In the first step, the CH3O- ion attacks the substrate in a slow step. This creates a tetrahedral intermediate. Loss of the chloride ion yields the  methyl acetate product.

The rate determining step is the formation of the tetrahedral intermediate. Since the reaction is first order in the acetyl chloride, if its concentration is increased ten times the rate of reaction is increased ten times.

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