pls pls help i need this soo bad ill give brainliest

Answer:

it is the cell wall :)

Explanation:

Answer: The answer is C

Answer:Attemted Failed

Maybe try to search

In a different way like:

what is the ingredient of cake

Instead of

how to make Cake

Answer:

B. An Arrhenius acid increases [OH–] in the Solution

Answer:

An Arrhenius acid increases [H+] in the solution.

Explanation:

i just took the test and this was the answer-

Answer:

243.15 K y -22 F

Explanation:

Para convertir la temperatura desde grados Celsius (°C) a kelvin (K) se debe sumar 273.15 K:

K = °C + 273.15 = -30°C + 273.15 K = 243.15 K

Para convertir desde grados Celsius (°C) a Fahrenheit (F), se multiplica por 9/5 y se suma 32, como sigue:

F = (9/5 x °C) + 32 = (9/5 x (-30°C)) + 32= -22 F

Por lo tanto, una temperatura de -30°C corresponde a 243.15 Kelvin y -22 grados Fahrenheit.

Answer:

Always wear safety goggles when performing an experiment.

Use caution when constructing the track.  

Ensure that the track is clear before releasing cars.

Report all accidents to the teacher.

Explanation:

Answer:

the reactants and products have have exactly the same molecules

The reactants and products have exactly the same atoms, therefore the concept of conservation of mass applies to chemical reactions. Therefore,  option (b) is correct.

According to this law, matter can neither be created nor destroyed, but can be converted from one form to another. So the same number and type of atoms in a chemical reaction before and after the chemical change are present.

The initial substances or reactants change into different substances or products in any chemical change. Both the reactants and products are made up of atoms as all matter is made up of atoms.

The matter is conserved as the equal number of atoms of each element in the reactants and products, and the total mass of the reactants must equal the total mass of the products.

The law of conservation of mass can be only followed in a chemical reaction if the reactants and products have exactly the same atoms.

Learn more about the law of conservation of matter, here:

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Answer:

CH4(g) +2O2____ CO2(g) +2H2O (l)

Answer:

C. Dipole

Explanation:

When a molecule is unevenly charged but overall neutral, for example, one atom has a negative charge, and one has a positive charge, they balance each other out when they bond and are known as a polar molecule. Dipole just means 2 poles (positive and negative).

Answer:Protons are positively charged is the correct statement about an atom

I've also corrected the other statements

Atoms contain protons and neutrons in their nucleus

Neutrons posses no charge and are neutral

The nucleon number is the total number of protons and neutrons in a nucleus

Answer:

A

Explanation:

Well, the human skeletal system produce red blood cells into and for the body.

Answer: a) No, both are different.

b) Ramesh- 9.9%

  Sarika - 10%

Explanation:

According to the solution prepared by Ramesh,

Mass of sugar he took (Solute) = 10 g

Mass of water he took (Solvent) = 100 g

Thus Mass % of the solution =

According to the solution prepared by Sarika,

Mass of sugar she took (Solute) = 10 g

Mass of Solution she took  = 100 g

Thus Mass % of the solution =

Explanation:

Answer:

B. Molarity will decrease

Explanation:

Molarity is one of the measures of the molar concentration of a solution. It is calculated by dividing the number of moles of the solute by the volume of the solvent. This means that the higher the amount of solute in relation to the volume of solvent, the higher the molarity of that solution.

In essence, adding water to a solution dilutes it i.e it increases the solvent's volume in relation to the solute, causing the molarity to decrease. In a nutshell, diluting a solution (by adding water or more solvent) causes the molarity of such solution to decrease. For example, if water is added to a 0.70 molar solution of CuSO4, the molarity of the solution will DECREASE.

Answer: Its B.

Explanation:

i cant quite explain

Answer: [tex]S[/tex] is the limiting reagent

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} S=\frac{10.0g}{32g/mol}=0.3125moles[/tex]

[tex]\text{Moles of} Ag=0.700moles[/tex]

[tex]2Ag+S\rightarrow Ag_2S[/tex]  

According to stoichiometry :

1 mole of [tex]S[/tex] require = 2 moles of [tex]Ag[/tex]  

Thus 0.3125 moles of [tex]S[/tex] will require=[tex]\frac{2}{1}\times 0.3125=0.6250moles[/tex]  of [tex]Ag[/tex]

Thus [tex]S[/tex] is the limiting reagent as it limits the formation of product and [tex]Ag[/tex] is the excess reagent.

Answer:

The original U.S. voting system had some similarities with that of Athens. In Athens, every citizen could speak his mind and vote at a large assembly that met to create laws. Citizens were elected to special councils to serve as organizers, decision-makers, and judges. The Greek idea of democracy was different from present-day democracy because, in Athens, all adult citizens were required to take an active part in the government. ... This form of government is called direct democracy. The United States has a representative democracy.

Answer: they both eat fish

Explanation:

Answer:

No region is safe from flooding. All 50 states are subject to flash floods.[1]

Flash floods can bring walls of water from 10 to 20 feet high.[2]

A car can be taken away in as little as 2 feet of water.[3]

To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[4]

Flooding is caused by spring thawing (snow and frozen grounds melting in the spring), heavy rains, snow melt runoffs, flash floods, and mudflows.[5]

Floods are the most widespread natural disaster aside from wildfires. 90% of all U.S. natural disasters declared by the President involve some sort of flooding.[6]

In preparation for a flood, it is important to stock up on first aid items, non-perishable foods, 3 gallons of water per person for 3 days, battery operated radio for weather reports, extra batteries, personal hygiene necessities.[7]

Based on Floodsmart, a 2,000 square foot home undergoing 12” of water damage could cost more than $50,000.[8]

Since flood damage is almost never covered by homeowners insurance, flood insurance is important for people living in high-risk flood zones.[9]

To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[10]

Communities particularly at risk are those located in low-lying areas, near water, or downstream from a dam.[11]

Answer:

[tex]E=5.16\times 10^{-19}\ J[/tex]

Explanation:

Given that,

The frequency of violet light, [tex]f=7.79\times 10^{14}\ Hz[/tex]

We need to find the energy of a photon. The formula for the energy of a photon is given by :

[tex]E=hf\\\\E=6.63\times 10^{-34}\times 7.79\times 10^{14}\\\\E=5.16\times 10^{-19}\ J[/tex]

So, the energy of a photon is equal to [tex]5.16\times 10^{-19}\ J[/tex].

c i think

Explanation:

if it's not look it up

Answer: 429 grams of [tex]Al(NO_2)_3[/tex]  should be added to 1.3 L of water to prepare 2.0 M solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

[tex]Molarity=\frac{n}{V_s}[/tex]

where,

n = moles of solute [tex]Al(NO_2)_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{165g/mol}[/tex] 

[tex]V_s[/tex] = volume of solution in Liters  

Now put all the given values in the formula of molarity, we get

[tex]2.0M=\frac{xg}{165g/mol\times 1.3L}[/tex]

[tex]x=429g[/tex]

Therefore, 429 grams of [tex]Al(NO_2)_3[/tex]  should be added to 1.3 L of water to prepare 2.0 M solution

Answer: Hence, the approximate molecular weight of the poymer is 64106 g/mol

Explanation:

[tex]\pi=CRT[/tex]

where,

[tex]\pi[/tex] = osmotic pressure of the solution = 2.012 mm Hg =  0.0026 atm

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (polypeptide) = 1.8274 g  

Volume of solution = 274 mL

R = Gas constant = [tex]0.0821Latm/Kmol[/tex]

T = temperature of the solution = [tex]31.40^0C=(273+31.40)K=304.4K[/tex]

Putting values in above equation, we get:

[tex]0.0026=\frac{1.8274 g\times 1000}{M\times 274ml}\times 0.0821\times 304.4[/tex]

[tex]M=64106g/mol[/tex]

Hence, the approximate molecular weight of the poymer is 64106 g/mol

Answer:

la photosintesis viene de la clorofila de la planta

Answer:

The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.

Explanation:

Answer:

D.

the sum of the masses.

Explanation:

Answer:

A

Explanation:

Answer:

d

Explanation:

can you help me with my question In the extended simile of the underlined passage from Paragraph 15 of "A Wagner Matinee," the narrator makes an observation about the soul that aring rokol been A. it is like a strange moss on a dusty shelf that, with excruciating suffering, can wither and die y for I the be B though after excruciating suffering it may seem to wither, the soul never dies, C. excruciating, interminable suffering that goes on for half a century can kill the soul.