How Fast can you answer how fast can i give you brainliest????? HELP

Answer:

B- shield

Explanation:

C IS NOT CORRECT.

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Answer: B shield

Explanation:

Answer:

Lewis structures, also known as Lewis dot diagrams, Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds

Explanation:

Answer:

375 grams

Explanation:

The percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid and 142 grams of calcium chloride is obtained is 82.55%

Percent yield is defined as the amount of product actually made compared with the maximum calculated yield. It is the ratio of actual yield to the theoretical yield.

Mass of calcium carbonate = 155 g

Mass of HCl = 250g

Mass of calcium chloride product = 142 g

Moles of calcium carbonate = 155 / 100 = 1.55 moles

Moles of HCl = 250 / 36.5 = 6.85 moles

Mass of calcium chloride = Moles x Molar mass

                                          = 1.55 mole x 111 g/ mole

                                          = 172 g /mole

Theoretical yield = 172 g

Actual yield = 142 g

Percent yield = Actual yield / Theoretical yield x 100
                      = 142 / 172 x 100

                      = 82.55 %

Thus, the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid and 142 grams of calcium chloride is obtained is 82.55%

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Answer:

The given isotope is Br 80

If 35 protons present then its atomic number is 35

Mass number is 80 so its meutrons are 45 because proton+ neutron = mass number

Its electron are 36 because of negative one charge

Explanation:

Answer: B

Explanation: intook the test

They all share genetic information as DNA, shaping their unique traits and functions through evolutionary processes.

Option (A) is correct.

The similarity among a peacock, a jellyfish, and a birch tree lies in the fact that they all share genetic information encoded in their DNA. Genetic information is the blueprint that determines an organism's traits, functions, and characteristics. Despite their diverse appearances and habitats, all living organisms, including these three examples, utilize DNA to carry hereditary instructions.

However, it's important to note that while they share genetic information, the way this information is expressed and the specific traits it codes for differ significantly among these organisms due to variations in their evolutionary history, adaptations, and environmental interactions.

This shared genetic foundation underscores the fundamental biological unity among all living beings on Earth, while the unique expression of this genetic information contributes to the incredible diversity of life forms.

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The complete question is:

How are a peacock, a jellyfish, and a birch tree similar?

A) They all share genetic information.

B) They all contain carbon.

C) They all reproduce the same way.

D) They all obtain energy in the same way.

Answer:

Two process that occur are dissolving and solvent

Statements 6,9,13,14 are hypertonic, 8,10,12 hypotonic, and 7,11,15 are isotonic solutions.

6. Hypertonic

7. Isotonic

8. Hypotonic

9. Hypertonic

10. Hypotonic

11. Isotonic

12. Hypotonic

13. Hypertonic

14. Hypertonic

15. Isotonic

A hypertonic answer is any external solution that has excessive solute awareness and coffee water concentration as compared to frame fluids. In a hypertonic answer, the internet movement of water will be out of the frame and into the solution.

A hypotonic answer has a decreased awareness of solutes than some other answer. In biology, a solution outdoor of a cell is referred to as hypotonic if it has a decreased attention of solutes relative to the cytosol. because of osmotic stress, water diffuses into the cell, and the cell often appears turgid, or bloated.

A solution that has the same salt concentration as cells and blood. Isotonic answers are typically used as intravenously infused fluids in hospitalized sufferers. Isotonic solutions include electrolyte stability just like plasma in the bloodstream. whilst an isotonic solution is administered, the fluid extent of the affected person is elevated without a fluid shift. not unusual examples of isotonic solutions are zero.nine% ordinary saline and lactated ringers.

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The unknown material : gold

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density  

m = mass  

v = volume  

mass of unknown material : 15.06 g

volume : 0.78 ml

The density of unknown material :

[tex]\tt \rho=\dfrac{15.06}{0.78}\\\\\rho=19.31~g/ml[/tex]

Materials that match the density: gold

Answer:

n chemistry and physics, activation energy is the energy that must be provided to compounds to result in a chemical reaction.The activation energy (Eₐ) of a reaction is measured in joules per mole (J/mol), kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). Activation energy can be thought of as the magnitude of the potential barrier (sometimes called the energy barrier) separating minima of the potential energy surface pertaining to the initial and final thermodynamic state. For a chemical reaction to proceed at a reasonable rate, the temperature of the system should be high enough such that there exists an appreciable number of molecules with translational energy equal to or greater than the activation energy. The term Activation Energy was introduced in 1889 by the Swedish scientist Svante Arrhenius.

Explanation:

Answer:

The activation energy for the forward reaction is the amount of free energy that must be added to go from the energy level of the reactants to the energy level of the transition state. The source of activation energy is typically heat, with reactant molecules absorbing thermal energy from their surroundings.

Explanation:

questions 3 gravity

question 1 meteorites

question 2 orbit

question 4 rocket and gaseous

Answer:

1. moons 2. orbits 3. gravity 4. rocky, gaseous

Explanation:

Answer:

590 g CaCl₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

5.3 mol CaCl₂

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of CaCl₂ - 40.08 + 2(35.45) = 110.98 g/mol

Step 3: Convert

[tex]5.3 \ mol \ CaCl_2(\frac{110.98 \ g \ CaCl_2}{1 \ mol \ CaCl_2} )[/tex] = 588.194 g CaCl₂

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

588.194 g CaCl₂ ≈ 590 g CaCl₂

Your answer would be an Arrhenius base

Hope this helps

Answer:

C

Explanation:

It is most likely non metal with a high electronegativity.

Dalton's atomic theory was proposed by John Dalton in 1803. It states that elements are made up of indivisible atoms, atoms of the same element are identical, and atoms cannot be created or destroyed.

Dalton proposed that the concept of atoms might be used to explain the laws of definite proportions and the conservation of mass. In his theory, atoms—which he described as "solid, massy, hard, impenetrable, moving particle(s),"—are the minuscule, indivisible units that make up all matter.

It is significant to highlight that Dalton had no knowledge of the potential existence of interior structure in atoms because he lacked the tools necessary to observe or perform further experiments on individual atoms. In a molecular modeling kit, where the various components are represented by spheres of various sizes and hues, we may imagine Dalton's atom as a component. We now know that atoms are not solid spheres, despite the fact that this paradigm is useful in some situations.

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Homogeneous and heterogeneous mixture in colloid, suspension and solution

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension and within the categories of homogeneous and heterogeneous mixtures there are more specific types of mixtures including solutions is alloys, suspensions, and colloids and a solution is a mixture where one of the substances dissolves in the other and the substance that dissolves is called the solute

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Answer:

D

Explanation:

it slowly changes rocks or minarials it puts it under pressure and compacks it and it forms a rock for example

Answer:

Explanation:

Answer:

b

Explanation:

Answer:

Decrease the distance between them or increase the mass.

Explanation:

F= GM1M2/ R²

Answer:

decrease the distance between the objects

Explanation:

i did the test and got da epic 100 score

Answer:A

Explanation:

Answer:

A

Explanation:

Carbon dioxide in the air

Answer:

c

Explanation:

it is acidic due to carbon dioxide dissolving into it and forming a weak carbonic acid.

Answer:

Explanation:

The final pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{10 \times 2}{20} = \frac{20}{20} \\ [/tex]

We have the final answer as

Hope this helps you

A 36.0 g sample of metal was heated from 0°C to 55.0°C. It absorbed 150 J of energy as heat then the specific heat of this piece of metal is 0.0758 J/g.°C  .

The term "specific heat" refers to the amount of energy needed to raise a substance's unit mass by one degree Celsius. This can be mathematically stated as:

q = m×c×ΔT,

where ,

q = the amount of heat

m = the mass of the substance

c = the respective substance's specific heat;

ΔT = the change in temperature.

So, if we want to determine the units for specific heat, we'll just isolate the term in the above formula to get

c = q / m × ΔT                    ( i )

Since heat is measured in Joules ( J ) , mass in grams ( g ) , and temperature in degree Celsius , we can determine that specific heat capacity from equation ( i )  by putting all the given data in this equation ,

c =  150 J / 36.0 g × 55.0 °C = 150 J / 1980 g.°C = 0.0758 J/g.°C

Therefore, specific heat is measured in Joules per g times degree Celsius.

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Answer:

14.99 mols of CO2

Explanation:

STP= 273 k , 1 atm , .0821 gas constant

N=PV/RT

N= 1x336/.0821x273

14.99 mols of CO2

659.6 grams of CO2

Answer:

2Zn(s) + O2(g)------2Zno

Answer:

0.1 M molar NaaOH

Explanation:

M1V1= M2V2

M1 = 0.150M NaOH

V1=100 ml

V2=150 ml

M2=?

M2= M1V1/V2

M2= 0.150*100/150=0.1 M

Answers:

Identify arrows pointing to bonding electrons.

✔ a, b, d

Identify arrows pointing to nonbonding electrons.

✔ c

Identify arrows pointing to structures containing sigma bonds.

✔ a, b, d

Identify arrows pointing to structures containing pi bonds.

✔ a

Explanation:

all the parts for those who need it!

these are all correct on edge! <3

Your question is incomplete. Please check below the full content

Identify arrows pointing to bonding electrons

a)✔a, b, d

b)✔ c

c)✔ a, c, b

d)✔ a

Identify arrows pointing to bonding electrons.

✔ a, b, d

The coordinate covalent bond is shown by an arrow with its head pointing towards the direction of the donation of an electron pair, as shown in Figure 2.

Here are 5 examples of covalent compounds

1 Hydrogen (H2) Hydrogen (H) is the simplest of all elements.

2 Oxygen (O2).

3 Nitrogen (N2).

4 Water (H2O).

5 Carbon Dioxide (CO2).

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Answer:

Explanation:

Those are the answers in order, BUT the Goldstein and Rutherford ones are confusing me because Rutherford discovered protons and the nuclear atom. Through my research I also noticed that Goldstein contributed to the discovery of the protons made Rutherford, so I listed him as the one who discovered the proton.

I hope this helps! Have a wonderful night! :D

Answer:

Deposition

Explanation:

The process of deposition is when an object goes from a gas to a solid. In the picture, the first container had a gas (molecules were far apart). In the second, the molecules were tightly packed (a solid).

Hope this helps!