Do the earth plates ride on the crust or mantle?

Answer:

question 2 is false

Explanation:

6 is D

Answer:

Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements.

Answer:

A. It forced the German government to pay out money it didn't have

Explanation:

Answer:

A. It forced the Germen government to pay out money it didn't have.

Sodium , bromine zinc magnesium sulphur nitrogen potassium oxygen lead

There can be two, solid (Hail) and liquid (Water).

Answer:

liquid and solid

liquid- rain

solid- hail and snow

I don't know about gas; probably not.

Answer:

1) clouds 2) quick 3) near 4) levels 5)nucleus 6) two 7) eight 8) eighteen 9) pairs 10) properties

Explanation:

hope i helped!

Answer:

1. clouds

2. quick

3. near

4. levels

5. nucleus

6. two

7. eight

8. eighteen

9. pairs

10. properties

Answer:

No.

Explanation:

This is because a solution is a mixture with two substances that have already dissolved in each other and so there is no residue left. Filtration works such that part of the mixture has smaller particles that can pass through the membrane of the filter paper while the bigger particles get stuck onto the paper as residue. A solution has a uniform size particle throughout and thus filtration does not work for purifying a solution.

Answer:

According to Bronsted-lowry concept  an acid is a hydrogen donnor and a base is a hydrogen acceptor.

Explanation:

Moles of O₂ = 3.92

Given

V=1 L

T=-118 °C + 273 = 155 K

P = 49.77 atm

Required

moles of O₂

Solution

the gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

Input the value :

n= PV/RT

[tex]\tt n=\dfrac{49.77~atm\times 1~L}{0.082\times 155}=3.92~moles[/tex]

Vanadium (V)

Vanadium is the only one in the 4th period here so

Answer:

covalent bond

Explanation:

Rafiq should expose one piece under the lamp for 10 days while keeping the other in the darkness.

In this experiment, it is essential to have a control group and an experimental group.

Based on the previous ideas, the best for him is to keep one piece of clothing in the darkness (control group), while exposing the other to the light of the lamp (experimental group).

In this way, he can determine if there is a real change of color by comparing both pieces after 10 days.

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Answer:

FeBr2

Explanation:

this isn't really an explanation but it's helpful so here, iron(II) bromide is an inorganic compound with the chemical formula FeBr₂. The anhydrous compound is a yellow or brownish-colored paramagnetic solid. Several hydrates of FeBr₂ are also known, all being pale colored solids.

Explanation:

Percentage yield = (278/365) * 100% = 76.16%.

Answer:

[tex]\boxed {\boxed {\sf 76.2 \% }}[/tex]

Explanation:

A percent yield helps measure how successful or precise a reaction was. It is ratio of measured yield to theoretical yield as a percent. The formula is:

[tex]percent \ yield=\frac{actual \ yield}{theoretical \ yield } *100[/tex]

For this reaction, the measured/actual yield was 278 grams, while the theoretical yield was 365 grams.

[tex]actual = 278 \ g \\\theoretical= 365 \ g[/tex]

Substitute the values into the formula.

[tex]percent \ yield =\frac{278 \ g}{365 \ g} *100[/tex]

Divide first. The grams (g) will cancel out.

[tex]percent \ yield =0.76164383561*100[/tex]

Multiply.

[tex]percent \ yield=76.1643835616[/tex]

The original measurements both had 3 significant figures, so we should round our percent yield to 3 sig figs. In this case, that is the tenths place.

The 6 in the tenth place tells us to round the 1 up to a 2.

[tex]percent \ yield \approx 76.2[/tex]

The percent yield is about 76.2 %

Explanation:

hope it helpful ✌️✌️

Answer:

C4H8O4

Explanation:

Let (CH20)x

C=1*12.01=12.01     (12.01, 1.01, 16.00 Avg mass of elements)

H=2*1.01=2.01

O=1*16.00=16.00

12.01 + 2.01 + 16.00 = 30.03

120.12/30,03=4

==> (CH2O)4 = C4H8O4

The molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex] is equal to [tex]C_4H_8O_4[/tex].

Given the following data:

Scientific data:

To determine the molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex]:

First of all, we would find the molar mass of [tex]CH_2O[/tex]:

[tex]CH_2O =12 +(1\times2)+16\\\\CH_2O =30\;g/mol[/tex]

For molecular formula:

[tex](CH_2O)n = 120.12\\\\30n = 120.12\\\\n=\frac{120.12}{30}[/tex]

n = 4.0

[tex](CH_2O)_4 = C_4H_8O_4[/tex]

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Answer: [tex]2Cl^-(l)\rightarrow 2e^-+Cl_2(g)[/tex]

Explanation:

Electrolysis of a subastance is breaking it into its constituents by the action of electrical current.  

In the electrolysis of molten sodium chloride, sodium metal is produced at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode.

[tex]2NaCl(l)\rightarrow 2Na^++2Cl^-[/tex]

At anode : [tex]2Cl^-(l)\rightarrow 2e^-+Cl_2(g)[/tex]

At cathode : [tex]2Na^+(l)+2e^-\rightarrow 2Na(l)[/tex]

2Cl- (l) → Cl2 (g) + 2e-

Answer:

The coordination number is 8

Potassium nitrate has an octahedral coordination structure

Answer:

Nuestra alimentacion debe estar basada en alimentos ricos en vitaminas, minerales como las frutas verduras, legumbres  y semillas.

Explanation:

Los alimentos ultraprocesados son altos en sodio, conservantes, y pobres en vitaminas, es por eso que deben ser evitados ya que algunos hasta se consideran hasta carcinogenos.

No se descarta los compuestos quimicos ultraprocesados ricos en grasa perjudiciales para la salud ya que fomentan la formacion de placa de ateromas.

Answer:

90.4Kg

Explanation:

The energy required= latent heat of vaporization

Latent heat of vaporization of water= 2260 KJ/Kg

Mass of water = 0.04 Kg

Heat required= 0.04Kg× 2260 KJ/Kg

Heat required= 90.4Kg

Answer: The minimum number of kilo Joules needed is 90.4KJ.

Explanation:

The energy required= latent heat of vaporization.

Latent heat of vaporization of water= 2260 KJ/Kg

Mass of water = 0.04 Kg

Heat required= 0.04Kg× 2260 KJ/Kg

Heat required= 90.4KJ.

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Answer:

B. Respiration

Explanation:

cellular respiration is the process where cells use glucose (C6H12O6) and oxygen gas (O2) to make carbon dioxide (CO2) water (H2O) and ATP, which is energy

formula:

C6H12O6 + 6O2 -> 6CO2 + 6H20 + 38ATP  

Answer:

Explain:i need this too ;-;

Answer:

Average atomic mass of the  vanadium = 50.9415 amu

Isotope (I) of vanadium' s abundance = 99.75 %= 0.9975

Atomic mass of Isotope (I) of vanadium ,m= 50.9440 amu

Isotope (II) of vanadium' s abundance =(100%- 99.75 %) = 0.25 % = 0.0025

Atomic mass of Isotope (II) of vanadium ,m' = ?

Average atomic mass of vanadium =

m × abundance of isotope(I) + m' × abundance of isotope (II)

50.9415 amu =50.9440 amu× 0.9975 + m' × 0.0025

m'= 49.944 amu

Explanation:

The abundance of the other isotope is 0.25% and the mass of the other isotope is 49.944 amu.

Natural abundance can be described as the abundance of isotopes of a chemical element naturally found on a planet. The relative atomic mass of these isotopes is the atomic weight of the element in the modern periodic table.

The abundance of an isotope can vary from planet to planet but remains relatively constant in time. The natural abundance of an isotope can be affected by the probability of its creation in nucleosynthesis and by the production of a given isotope as a daughter of the natural radioactive isotope.

Given, the average atomic mass of Vanadium = 50.9415 amu

The mass of one isotope = 50.9440 amu, relative abundance =99.75 %.

The relative abundance of the other isotope = 100 - 99.75 = 0.25 %

50.9415  = 50.9440 × 0.9975 + 0.0025 × M

Mass of other isotope = 49.944 amu

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Answer:

Lipid tests

Sudan III is a red fat-soluble dye that is utilized in the identification of the presence of lipids, triglycerides and lipoproteins. The Reaction: Sudan III reacts with the lipids or triglycerides to stain red in colour.

Answer:

I think soo fats and oils

Answer:

27

Explanation:

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{5.66 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{5.66}{6.02} \\ = 0.940199...[/tex]

We have the final answer as

Hope this helps you

Answer:

Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa

Explanation:

The law of partial pressure by Dalton, in a mixture of gases which do not react chemically together, the total pressure is equal to the sum of the partial pressures of the individual gases.

According to this law, the total pressure exerted by the gases above the displaced water is equal to the sum of the partial pressure of water vapor and the partial pressure of hydrogen gas: Ptotal = pH₂ + pH₂O

Therefore, pH₂ = Ptotal - pH₂O

Vapor pressure of water at 37°C = 3.17 kPa; Ptotal = 102.0 kPa

pH₂ = (102.0 - 3.17) kPa

pH₂ = 98.8 kPa

Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa

all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness