need help pls
answer this
whoever answer this correct i will mark the brainliest​

Answer:

Lystrosaurus

Explanation:

Lystrosaurus, a vegetarian dinosaur whose name apparently means "trowel dinosaur," inhabited the area in the earliest Triassic period, 220 million years. It is believed to be have been herbivorous which developed to be around one meter long, with an average build similar to a pig. Lystrosaurus skeletons have only been discovered in Antarctic peninsula, India, and Africa.

Answer:

i moles of copper has 6.022 multiplied by 10raseto 23

Explanation:

Answer:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Explanation:

hope this helped

Answer:

S = 21.92 %

F = 78.08 %

Explanation:

To find the percent composition of each element in SF6, we must find the molar mass of SF6 first.

Molar mass of SF6 = 32 + 19(6)

= 32 + 114

= 146g/mol

mass of Sulphur (S) in SF6 = 32g

mass of Fluorine (F) in SF6 = 114g

Percent composition = mass of element/molar mass of compound × 100

- % composition of S = 32/146 × 100 = 21.92%.

- % composition of F = 114/146 × 100 = 78.08%.

Answer:

Explanation:

The first thing we need to know is that the amino acid of tyrosine has an aromatic ring within its structure.

Also, recall that aromatics hydrocarbons are considered to be unsaturated and non-polar.

So, since like dissolve like. Then, The non-polar character of tyrosine is enhanced by its aromatic ring. As a result, Tyrosine amino acid is much more soluble in less polar solvents like methanol and ethanol than in moderate highly polar water.

From the given information:

Since water is a very polar solvent, and tyrosine amino acid is not particularly polar, it is just barely soluble in it.

In addition to the aforementioned, peptides are strongly polar in nature. However, as the amount of tyrosine amino acids in a peptide increases, the region of the non-polar portion of the peptide increases (owing to the rise of the aromatic ring), and thus the non-polar value of the peptide will also rise. And this non-polar nature of peptide will make them more soluble in non-polar solvent and decrease its solubility in water (because water is polar in nature). And since peptides are non-polar, they would be more soluble in non-polar solvents and have less solubility in water.

Answer:

4.0

Explanation:

we have a buffer system formed by a weak acid (benzoic acid C₆H₅O₂H) and its conjugate base (benzoate ion C₆H₅O₂⁻, coming from sodium benzoate C₆H₅O₂Na). Given the acid dissociation constant (Ka) for benzoic acid is 6.5 × 10⁻⁵, we can calculate the pH of the buffer solution using the Henderson-Hasselbach equation.

pH =pKa + log [base]/[acid]

pH =-log Ka + log [C₆H₅O₂⁻]/[C₆H₅O₂H]

pH =-log 6.5 × 10⁻⁵ + log (0.15 M/0.25 M) = 4.0

Answer:

Partial lunar eclipse.

Explanation:

A lunar eclipse is a cosmological event by which, in the presence of the Earth between the Sun and the Moon, the latter does not receive the light of the Sun in the totality of its visible face, with which a part (or the totality ) of her is in the dark.

Thus, if the lunar eclipse implies an absence of sunlight in the entire lunar surface, the eclipse will be total, while if the eclipse implies an absence of light only in part, the eclipse will be partial (which is the most common event).

Answer:

I think Cs

Explanation:

because it has 6 energy levels

Answer:

[tex]\%N=28.6\%\\\\\%O=71.4\%[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible to calculate the percent compositions, by dividing the mass of each element by the sum of the masses of the elements as shown below:

[tex]\%N=\frac{m_N}{m_N+m_O} *100\%\\\\\%O=\frac{m_O}{m_N+m_O}*100\%[/tex]

Thus, we plug in the given masses to obtain:

[tex]\%N=\frac{10.0g}{10.0g+25.00g} *100\%=28.6\%\\\\\%O=\frac{25.00g}{10.0g+25.00g}*100\% =71.4\%[/tex]

Regards!

Answer:

7.3125grams

Explanation:

Molarity is the measure of the molar concentration of a solution. It can be calculated using the formula as follows:

Molarity = number of moles (n) ÷ volume (V)

Based on the information given,

Molarity = 1.25 M

Volume = 100 mL = 100/1000 = 0.1 L

Molarity = n/V

1.25 = n/0.1

n = 1.25 × 0.1

n = 0.125mol

Using the below formula to calculate the mass of NaCl;

mole = mass/molar mass

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

0.125 = mass/58.5

mass = 0.125 × 58.5

mass = 7.3125 grams

Answer:

electrons are located outside of the atoms nucleus

Answer:

Mg

Explanation:

I think Mg is correct not too sure tho

Answer:

(NH4)3PO4 > Na2SO4 > KCl > C6H12O6 > CO2

Explanation:

Colligative properties are those properties that depend on the amount of solute present in the system.

Usually, the more the number of particles in the system, the greater the impact of colligative properties on phase change temperatures if all the solutions have the same molarity concentration.

Hence, the order of impact on phase change temperatures is as follows; (NH4)3PO4 > Na2SO4 > KCl > C6H12O6 > CO2

Answer:

3.89

Explanation:

the specific heat is usually quoted at constant pressure but in some applications where pressure changes it is quoted at quoted at constant volume

Answer:

alkali metals

Explanation:

:)

Answer:

The given statement - The main criterion for sigma bond formation is that the two bonded atoms have valence orbitals with lobes that point directly at each other along the line between the two nuclei , is True.

Explanation:

The above statement is correct , because the sigma bond is produced by the head on overlapping, the orbitals should all point in the same direction.

SIGMA BONDS - Sigma bonds (bonds) are the strongest type of covalent chemical bond in chemistry. They're made up of atomic orbitals that collide head-on. For diatomic molecules, sigma bonding is best characterized using the language and tools of symmetry groups.

Head-on overlapping of atomic orbitals produces sigma bonds. The concept of sigma bonding is expanded to include bonding interactions where a single lobe of one orbital overlaps with a single lobe of another. Propane, for example, is made up of ten sigma bonds, one for each of the two CC bonds and one for each of the eight CH bonds.

Hence , the answer is true .

Answer:

177 mmHg

Explanation:

Given that:

The sample of  a gas is with Pressure (1) [tex]P_1[/tex] = 500 mmHg

The initial temperature [tex]T_1[/tex] = 773 K

The final temperature [tex]T_2[/tex] = 273 K

Using ideal gas equation:

[tex]\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\ \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\ (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\ P_2 = 176.58 \ mmHg \\ \\ \simeq 177 mmHg[/tex]

Answer:

The solubility of gases decreases with pressure as that of solids and liquids is not affected.

Answer:

A. The actual number of atoms in a molecule

Explanation:

Molecular formula is simply defined as a type of chemical formula that describes the type and number of atoms present in a single molecule of a compound.

Looking at the options, the correct answer is option A.

Answer:

a

Explanation:

Answer:

Answer is A - The low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Explanation:

The low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Charles states that, the volume of aa given mass of gas is directly proportional to its temperature at constant pressure.

Hence, to understand this behavior of the gas, we must understand that the low temperature outside lowers the volume of the gas according to Charles's law because this law describes how a gas will behave at constant pressure.

Learn more about Charles's law:https://brainly.com/question/16927784

#SPJ6

Answer:

[tex] \frac{V _{1}}{T _{1}} = \frac{V _{2}}{T _{2} } \\ \frac{446.9}{(14 + 273)} = \frac{238.7}{T _{2} } \\ {T _{2}} = \frac{238.7 \times 287}{446.9} \\ {T _{2}} = 153.3 \: kelvin \\ = 119.7 \degree \: c[/tex]

Answer:

pH = 12.08

Explanation:

First we calculate how many moles of each substance were added, using the given volume and concentration:

As HBr is a strong acid, it dissociates completely into H⁺ and Br⁻ species. Conversely, KOH dissociates completely into OH⁻ and K⁺ species.

As there are more OH⁻ moles than H⁺ moles (5.55 vs 3.75), we calculate how many OH⁻ moles remain after the reaction:

With that number of moles and the volume of the mixture, we calculate [OH⁻]:

With [OH⁻], we calculate the pOH:

With the pOH, we calculate the pH:

Solution :

a). [tex]$SO_3$[/tex]

  This compound is known as sulfur trioxide.

  The molecular shape of sulfur trioxide is trigonal planer.

   And the bond angle is 120°.

b). [tex]$N_2O$[/tex]

   This compound is known as Nitrous oxide. Here, nitrogen is in the center.     There is no lone pair around the nitrogen atom and it forms two sigma bonds with the other two atoms.

 It is linear in shape.

  The bond angle between them is 180°.

c). [tex]$CH_2Cl_{2}$[/tex]

  This compound is known as the Dichloromethane.

   The molecular shape of the compound is tetrahedral.

   The bond angles is 120°

Answer:

The maggots had traces of this man in them and the entomologists found out who he was just by using the DNA in the maggots.

Explanation:

Answer:

She shares how there were maggots found in an empty house and found cocaine on them. By this, they knew that the maggots had been feeding off human remains.  They were then able to run more tests and find DNA that were on these maggots and they were able to discover who the victim was.

Answer:

c

Explanation:

Answer:

A current runs through a loop of wire in a magnet field; the force from the magnet causes the wire to rotate

Explanation:

https://www.jameco.com/Jameco/workshop/ProductNews/motor-buyers-guide.html#:~:text=Electric%20motors%20work%20by%20converting,or%20direct%20(DC)%20current.&text=Electric%20Motors%20have%20an%20array%20of%20applications.

its hard to explain simply because i dont have a mastery over the subject yet myself, but this article should help explain it

if you have any questions, leave them in the comments and i will try to answer them, if this helped, pls give brainliest

Answer:

1 Calcium, 2 Nitrogen, and 4 oxygen

Explanation:

there is no number before of after Ca(calcium), so there is only 1. No(nitrogen) has no number next to it so there would be only 1 of it,but there is a 2 after the parenthesis so there is 2 nitrogen (2*1=2). O(oxygen) has a two next to it so there would be only 2 oxygen, but there is a two after the parenthesis so instead there are 4 oxygen because 2*2=4. Hope this helped you <3

Answer:

a e i o u

Explanation:

a e i o u

Answer:

3.4g/dm³

Explanation:

Mass concentration = mass of solute/volume of solution

According to this question;

Mass of rubidium = 8.5g

Volume of rubidium hydroxide solution = 2.5dm³

Mass conc. = 8.5/2.5

Mass conc. 3.4g/dm³.