Based on the reaction, identify the products. BeF2 + Mg → MgF2 + What type of reaction does this represent?

Answer: B

Explanation:

Answer: B- Advertising are capable of manipulating...

Explanation:

Answer:

hbyiy

Explanation:

Answer:

Are basic:

[OH⁻] = 3.13x10⁻⁷M and [H₃O⁺] = 9.55x10⁻⁹M

Explanation:

A solution is basic when pH = - log [H₃O⁺] is higher than 7.

It is possible to convert [OH⁻] to [H₃O⁺] using:

[H₃O⁺] = 1x10⁻¹⁴ / [OH⁻]

a. [OH⁻] = 3.13x10⁻⁷M

[H₃O⁺] = 1x10⁻¹⁴ / [3.13x10⁻⁷M]

[H₃O⁺] = 3.19x10⁻⁸M

pH = - log [H₃O⁺] = 7.50

[OH⁻] = 3.13x10⁻⁷M is basic

b. pH = -log [H₃O⁺] = - log 0.000747M = 3.13.

This solution is not basic

c. [H₃O⁺] = 9.55x10⁻⁹M

pH = 8.02

This solution is also basic.

Answer:

389 mL solution

Explanation:

Step 1: Given data

Step 2: Calculate the volume of saline solution

The concentration of the NaCl solution is 0.900% (m/v), that is, there are 0.900 g of NaCl every 100 mL of solution.

3.50 g NaCl × 100 mL solution/0.900 g NaCl = 389 mL solution

A solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent

The definition of the solute and solvent is:-

The data given in the NaCl solution is: 0.900% (m/v)

Mass of sodium chloride: 3.50 g

Volume of saline solution: ?

The concentration of the NaCl solution is 0.900% (m/v), that is, there is 0.900 g of NaCl every 100 mL of solution.

[tex]\frac{3.50 * 100}{0.900} = 389 mL solution[/tex]

Hence, 389ml is required.

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a. The unit cell is the smallest group of atom which have overall symmetry of a crystal, and from which is the entire letters can be buled built up by repetition in 3 dimensions.

b. The volume(v) of the unit cell is equal to the cell edge length (a)cubed.

c. density of polonium is 9.32g/cm3.

Answer:

1. Least

2. Most

Answer:

1st one is less 2nd is greater

Explanation:

Answer:

9.99x10-3

will this help mate?

Answer:

See explanation

Explanation:

The reaction is shown in the image attached. This reaction occurs by a carbocation (ionic) mechanism.

The lone pair on the nitrogen atom attacks the carbocation leading to the formation of the product as shown in the image attached.

Since the reaction occurs in a 1:1 ratio, two moles of reactants yields two moles of product.

Answer:

Same

Absorbed

Explanation:

When you are dealing with solutions the best way to tell that something has been absorbed is when the solution and the beam color are the same, since they have the same color you can be sure that the color has been absorbed properly and the greatest absorbance has occured.

The fill in the blanks should be filled with the same and absorbed.

The following information should be considered:

Therefore we can conclude that the fill in the blanks should be filled with the same and absorbed.

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Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 400 × 15

We have the final answer as

Hope this helps you

Answer:

The Second Law of Thermodynamics poses an insurmountable problem for ... More time will make things worse for the Darwinist, not better. ... error fail-safe and proof-reading devices utilized for quality control, assembly ... No one really supports the idea that the sun + non life = life

Explanation:

According to the second law of thermodynamics, the energy of the universe is conserved but the entropy of the universe is continuously increasing.

The second law of thermodynamics put some restrictions on the direction of heat transfer and attainable efficiencies of heat engines. This law stated that any spontaneously happening process will lead to an escalation in the entropy (S) of the universe.

This law explains that the entropy of an isolated system will never decrease with time. Mathematically, the 2nd law of thermodynamics:

ΔS (universe) > 0

where ΔS of the universe is the change in the entropy of the universe.

The second law of thermodynamics provides the criterion for the feasibility of any physical or chemical process. A physical or chemical process cannot take place unless it must follow both the 1st and 2nd laws of thermodynamics.

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Answer:

Mass of Fe produced = 4.468 g

Explanation:

Given data:

Mass of Fe produced = ?

Mass of Fe₂O₃ react = 6.50 g

Solution:

Chemical equation:

2Fe₂O₃        →     4Fe + 3O₂

Number of moles of Fe₂O₃ ;

Number of moles = mass/molar mass

Number of moles = 6.50 g/159.69 g/mol

Number of moles = 0.04 mol

Now we will compare the moles of iron and ironoxide.

                    Fe₂O₃             :             Fe

                         2                :              4

                       0.04             :             4/2×0.04 = 0.08 mol

Mass of iron produced:

Mass = number of moles × molar mass

Mass = 0.08 mol × 55.85 g/mol

Mass = 4.468 g

Answer:

..............what.......

Answer:

The Answer is B

Explanation:

the total mass of the blocks would be the same apart as together.

Answer:

is equal to the number of protons in carbon (C).

Answer:

C

Explanation: I think

Answer:

f

Explanation:

Answer:

False

Explanation:

Answer:

Neutral atoms can be turned into positively charged ions by removing one or more electrons.

Explanation:

If there is an atom that has 9 protons and 9 electrons, removing an electron from the atom will gain a postive charge.

Answer:

4.67M

Explanation:

The concentration of methanol (CH3OH) can be calculated using the following:

Molarity (M) = number of moles(n)/volume(v)

However, mole is not given. It can be obtained by using:

Mole = mass / molar mass

Where; mass = 34.4g

Molar mass (MM) of CH3OH is:

= 12 + 1(3) + 16 + 1

= 12 + 3 + 17

= 32g/mol

mole = 34.4/32

mole = 1.075mol

The volume needs to be converted to L by dividing by 1000

230mL = 230/1000

= 0.230L

Molarity = mol/volume

Molarity = 1.075/0.230

Molarity = 4.6739

Molarity = 4.67M

The concentration of CH3OH in solution is 4.67M

Answer:

the answer is A

Explanation:

edg 2020

Answer:

the air above a wildfire/A

Explanation:

Answer:violet

Explanation:Even though violet waves have the shortest wavelength of the visible light spectrum, they carry the most energy.

Answer:

The total heat required is 4088.6 J

Explanation:

We have three processes which involve heat absorption. We have to calculate the heat of each process and then to calculate the total heat.

1- liquid ethanol is heated from 25ºC (298 K) to the boiling point 78.5ºc (351.5 K). We use specifi heat of liquid ethanol to calculate the heat absorbed in this part:

H1= m x Sh x ΔT

H1= m x Sh x (Tfinal - Tinitial)

H1= 3.95 g x 2.45 J/g.K x (351.5 K -298 K)

H1= 517.7 JExplanation:

Answer:

sorry to do this but I really needed some points to ask my question from someone else so that's why I am doing so really sorry and thank you for free points

The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. Therefore, the correct option is option C.

Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.

Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.

If an electron of hydrogen gets excited and drops from energy level 2 to level 1 to release  least energy. The level shows the energy levels.

Therefore, the correct option is option C.

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Answer:

CA, AI, O

Explanation:

Look at a periodic table and locate each element. Note their electronegativity levels.

Answer:

for electricity, watts as in back to the future "1.21 jigga watts"!

Explanation:

Answer:

Kindly check the explanation.

Explanation:

NADH is oxidized anaerobic conditions by lactate dehydrogenase because in order to transform or change Pyruvate into Lactate it has to happen in an anaerobic condition that is where we hardly find oxygen(in the presence of no oxygen).

The chemical compound or say the enzyme known as lactate dehydrogenase gets its proton from NADH( in a REDOX type reaction). After getting the proton from NADH, it uses that to convert Pyruvate into Lactate.

NB: the conversion can also be done in aerobic condition but more ATP will be produced. With anaerobic condition, less ATO is produced and there is re-oxidation.

Answer:

Yes, the equation (2 Na + H20. 2 NaOH + H2​ ) is a balanced equation.

Answer:

Explanation:

From the given information:

The percentage wieght of mixture [tex]x_w[/tex] = 0.4

The distillate = 70

From equilibrium data in Exercise 7.33

The Feed W = 100

The Liquid residue F = Feed(W) - Distillate (D)

= 100 - 70 = 30

By applying rayleigh equation;

[tex]In \bigg (\dfrac{F}{W}\bigg)= \int^{xF}_{x_w}\dfrac{1}{y-x} \ dx[/tex]

From the plot of the graph of [tex]\dfrac{1}{y-x} \ vs \ x[/tex]; the area under the curve is being calculated between the point {[tex]x_1 = 0.4 \ and \ x_2[/tex] }.

Such that; the area [tex]= In \bigg( \dfrac{100}{30}\bigg)[/tex] = 1.209

Similarly, the value of xF = 0.067

∴

[tex]y_D = \dfrac{F_{xF} - W_{xW}}{D}[/tex]

[tex]y_D = \dfrac{30(0.067)-100(0.4)}{70}[/tex]

[tex]y_D = 0.543[/tex]

The nuclear symbols for carbon-12,carbon-13 , carbon-14 are  ¹²₆C,¹³₆C,¹⁴₆C respectively as they are the isotopes of carbon.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable.Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .

Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.

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