PLEASE HELP WITH CHEMISTRY !! WILL GIVE BRAINLIEST AND 10 POINTS

Answer:

[He]2s2  2p1.

that is the answer have an amazing day. Remember your an amazing person for who you are.

Answer:

C

Explanation:

The geographical features acted as a natural defense for Egypt against enemies from the south is cataracts of Nile. Hence, option C is correct.

The Nile River, one of Egypt's most notable natural features, was the envy of neighboring civilizations and allowed the Egyptians maintain contact with populations in the Mediterranean region.

Huge deserts extend well beyond the lush terrain that surrounds the Nile River on both sides. The Sahara Desert, the world's biggest desert, is to the west. More desert and the Red Sea may be found east of the Nile. These deserts served as an excellent natural defense against invaders.

The Egyptians had built-in fortifications thanks to the river and the desert. The delta of the Nile River is swampy. Egypt was unable to construct a port at the mouth of the Nile as a result. Invaders found it hard to approach Egyptian villages along the river as a result.

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Answer:

there are many valleys and mountain in this region

magar,gurung,brahmins are the main inhabitants of this province

there is possibility of tourism development in this province

production of apple in mountains and coffe in hilly has made this region popular .

Hope it helps

Answer:

There are many valleys and mountain in this region . Magar, Gurung, and Brahmins are the main inhabitants of this province . There is possibility of tourism development in this province . Production of apple in mountains and coffee in hilly has made this region popular.

Explanation:

May I have brainliest please? :)

Answer:

0.007 mol

Explanation:

Step 1: Given data

Volume of acetaminophen: 0.8 mL

Step 2: Calculate the mass corresponding to 0.8 mL of acetaminophen

The density of acetaminophen is 1.26 g/mL.

0.8 mL × (1.26 g/mL) = 1 g

Step 3: Calculate the number of moles corresponding to 1 g of acetaminophen

The molar mass of acetaminophen is 151.16 g/mol.

1 g × (1 mol/151.16 g) = 0.007 mol

Answer & Explanation:

Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.

Answer:

Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.

Explanation

Sample response form Edg

Answer:

Local Winds

Explanation:

Answer: I think it would be D. Local winds

Explanation: Sorry if I am wrong.

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The question is asking you to compare each elements electrons, specifically valence since it mentioned their placement on the table.

Similarly: they both are only one electron away from stability (a full octet)

Difference: Sodium will want to loose the one electron, and Chlorine will take it.

Answer:

14.52%

Explanation:

The percentage by mass (WW%) is calculated by using the formula:

Mass of solute/mass of solution ×

100

The solute (Al) is 22.5g while the solvent (Al2O3) is 155g

Hence, percent by mass is:

22.5/155 × 100

= 0.1452 × 100

= 14.52%

Answer:

NH4

Explanation:

empirical formula is the ratio of all elements to each other. so

2:6= 1:4

that's why

N1H4 or NH4

Answer:

556g/mol

Explanation:

The gram formula-weight for U₂O₅ is the molar mass of a compound. It is determined by adding the atomic masses of the component and then expressed in grams.

  Atomic mass of U = 238g/mol

  Atomic mass of O = 16g/mol

gram formula-weight for  U₂O₅ = 2(238) + 5(16) = 556g/mol

Answer:  Electron shielding has little effect on the effective nuclear charge because electrons are being added to principal energy levels, not to any inner levels. As the nuclear charge increases across a period, the effective nuclear charge acting on the outermost electrons increases.

Explanation:

Down a group in periodic table, the number of electron in an atom increases. Therefore, the shielding of an electron from the nuclear charge by neighbouring electrons increases which further reduces the ionization energy.

Ionization energy is the minimum amount of energy required to remove the loosely bound electron from the valence shell of the atom. From the left to right in a row in periodic table the ionization energy increases and down a group it decreases.

Metals in left side of periodic table are electron rich and easily loss electrons because, the valence electrons in them are loosely bout due to less effective nuclear pulling.

The less the nuclear pulling to the electrons the less electronegative the atom is. The electrons can shield each other from the nuclear attractive pulling. Hence, down a group as the number of electrons increases, this shielding or screening effect also increases results in less nuclear charge to the valence electron.

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Answer:

Yes. The scientific sources disputed several of the fitness instructor’s points. For example, he mentioned that GMO foods cause food allergies, but two credible sources disputed this claim. The lab technician, however, supported her findings with verifiable scientific information.

Explanation: plato

Answer:

Covalent Bonds

General Formulas and Concepts:

Explanation:

We have 3 types of bonds: Polar Covalent, Nonpolar Covalent, and Ionic bonds.

Nonpolar Covalent bonds share the electrons equally between the compound.

Polar Covalent bonds do NOT share the electrons equally, but STILL SHARE the electrons; the electron tends to stay with the element with the stronger electron affinity and thus creates dipoles.

Ionic bonds DO NOT share electrons. The electrons are transferred to the respective elements.

Answer:

6K + N₂ —> 2K₃N

Explanation:

K + N₂ —> K₃N

The above equation can be balanced as illustrated below:

K + N₂ —> K₃N

There are 2 atoms of N on the left side and 1 atom on the right side. It can be balance by putting 2 in front of K₃N as shown below:

K + N₂ —> 2K₃N

There are 6 atoms of K on the right side and 1 atom on the left side. It can be balance by putting 6 in front of K as shown below:

6K + N₂ —> 2K₃N

Now the equation is balanced.

The initial temperature of the metal = 35 °C

Heat can be formulated :

Q = m . c . ΔT

Q = heat, J

c = specific heat, J/g C

ΔT = temperature, °C

m = 20 g

c = 5 J/(g°C)

Q = 500 J

T₁ = 40 C

the initial temperature :

[tex]\tt \Delta t(T_2-T_1)=\dfrac{Q}{m.c}\\\\40-T_1=\dfrac{500}{20.5}\\\\40-T_1=5\\\\T_1=35^oC[/tex]

Answer:

22Ω

Explanation:

Given parameters:

Potential difference  = 3.3V

Current  = 0.15A

Unknown:

Resistance  = ?

Solution:

According to ohm's law, potential difference, current and resistance are related by the expression below;

             V = I R

where V is the voltage

           I is the current

          R is the resistance

          3.3 = 0.15 x R

             R = [tex]\frac{3.3}{0.15}[/tex]   = 22Ω

Answer:

They also showed the effects of pressure on volume if temperature stayed the same

Explanation:

They also showed the effects of pressure on volume if temperature stayed the same is the experiment that will provide an evidence for Boyle's law.

Boyle's law states that "the volume of a fixed mass of a gas varies inversely as the pressure changes, if the temperature is constant".

Answer:

No, It is not okay to pretend on social media.

Explanation:

No, it is not okay for people to post fake vacation pics and other fake info on social media. This is very wrong, as -

Answer:

it is not ok because there are other people that will look at those pictures and say aww i wish i were them but we all need to exept who we are

hope this helped

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Explanation:

Answer:

The temperature of a gas at STP is 273K

Answer:

Potential Energy

Explanation:

By compressing the spring there is more potential energy.

Answer:

Be careful about when to use capital letters. For example, CO means a molecule of carbon monoxide but Co is the symbol for cobalt

Explanation:

Answer:

10 protons

Explanation:

The atomic number of an element is equal to the number of protons of the element. The atomic number of neon is 10. Therefore, neon contains 10 protons.

10 protons are in the nucleus of one atom of neon based on this information found in the Periodic Table.

The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is frequently used in physics, chemistry, and other disciplines and is frequently regarded as a symbol of chemistry.

The elements are organized in what is known as the periodic table. Columns and rows are used to organize the table. The horizontal rows are referred to as "periods," while the vertical columns are known as "groups."

Thus, The atomic number of an element is similar to the number of protons of the element. The atomic number of an element neon is 10. So, neon contains 10 protons.

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Answer:

a hypothesis is an assumption before further investigation (a guess)

Explanation:

hello hello I hope this helps LOL have a nice dayyyyy

Answer:

after gathering initial data and defining the research​

Explanation:

"Hypothesis" refers to the researcher's scientific guess or prediction about the outcome of a research. Such expectation is being done after gathering initial data and defining the research, which means it happens before even conducting the study.

Under hypothesis, the variables' relationships are being predicted but with no evidence yet. It is very important to make a hypothesis according to three criteria: specificity and clearness, testability and falsifiability.

Answer:

Density, [tex]d=2.09\ g/cm^3[/tex]

Explanation:

Given that,

Mass of a flask is 450 g

Volume of benzene added to the flask is 145 mL or 145 cm³

The weight of the flask and benzene is found to be 754 g.

We need to find the density of the benzene.

Weight of benzene added = total weight of flask and benzene-mass of flask

m = 754 g - 450 g

m = 304 g

Density = mass/volume

So,

[tex]d=\dfrac{304\ g}{145\ cm^3}\\\\d=2.09\ g/cm^3[/tex]

So, the density of the benzene is [tex]2.09\ g/cm^3[/tex].

Answer:

Bedrock lies below the soil layers.

Horizon O forms from organic material.

Horizon C is least affected by the soil formation process

Explanation:

Hope this helped

Answer:

it's c i think

Explanation: