Please help I’ll mark brainliest! Chemistry

Answer:

The correct answer is B)The systematic name is the metal name followed by the charge on the metal atom. It is written as a Roman numeral and is in parentheses.

The common name is formed from the Latin root followed by -ous for low charge form, -ic for high charge form

Answer:

Since most of the data scientist collect is quantitative, data tables and charts are usually used to organize the information • Graphs are created from data tables • They can allow the investigator to get a visual image of the observations, which simplifies interpretation and drawing conclusions • Valid conclusions depend

The information that the reduction potentials of two elements give about a redox reaction between those elements is which element will be oxidized and which will be reduced. The correct option is A.

Redox reactions include a change in the oxidation state of the substrate. Loss of electrons or a rise in an element's oxidation state is considered to be oxidation.

Gaining electrons or lowering an object's or its atoms' oxidation state are both considered reductions. A chemical reaction known as an oxidation-reduction (redox) reaction includes the exchange of electrons between two substances.

The reduction potential tells about the element that will be oxidized ad which will be reduced in the redox reaction.

Thus, the correct option is A. Which element will be oxidized and which will be reduced.

To learn about redox reaction, here:

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Answer:

Option (A)

Which element will be oxidized and which will be reduced

Explanation:

Hopes this helps.

Answer:

Density

Explanation:

Density of a substance is the mass per unit volume of the substance.

Mass is the amount of particles contained in a matter

Volume is the space occupied by the substance;

 To find density, we simply use;

          Density  = [tex]\frac{mass}{volume}[/tex]  

 So;

 Mass  = Density x Volume

   From;

            M = D x V

M is the mass

D is the is the density

V is the volume

Answer:

D

Explanation:

the correct answer is d

Answer:

d

Explanation:

Its just seem like NaCl structure

Answer:

Carbon Dioxide

Explanation:

Plants inhale Carbon Dioxide and exhale Oxygen

Answer:

It shows constant motion when a straight line( not parallel) is formed in distance time graph.

Answer:

(D) (CH3CH2)2NH

Explanation:

In order to decide which base is strongest we need to calculate its PKb

PKb = -log [Kb]

A large Kb value and small PKb value gives the strongest base

 Compound                   Kb                           PKb      

(A) C6H5NH2 -         4 x 10^-10                      9.349

(B) NH3                     1.76x 10^-5                    4.754

(C) CH3NH2              4.4x 10^-4                     3.357

(D) (CH3CH2)2NH   8.6x 10^-4                     3.066

(E) C5H5N                  1.7x10^-9                      8.77  

Clearly (CH3CH2)2NH is the strongest base.

Answer: NO

Explanation:

Answer:

yes

Explanation:

Answer:

[OH⁻]= 6.76*10⁻¹² M

pH= 2.83

[H₃O⁺]= 1.48*10⁻³

Explanation:

The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution that indicates the concentration of hydroxyl ions [OH-] present in a solution. The pOH is defined as the logarithm of the concentration of OH- ions, with the sign changed:

pOH= -log[OH⁻]

In this case, pOH= 11.17. So:

11.17= -log [OH⁻]

Solving:

-11.17=log [OH⁻]

10⁻¹¹ ¹⁷= [OH⁻]

6.76*10⁻¹² M= [OH⁻]

pH, short for hydrogen potential, is a parameter that indicates the concentration of hydrogen ions [H⁺] or [H₃O⁺] that exist in a solution and is calculated as the logarithm of the concentration of H⁺ ions, with the sign changed:

pH= -log[H⁺]= -log[H₃O⁺]

The relationship between pH and pOH can be established by the expression:

pH + pOH= 14

In this case, being pOH=11.17:

pH + 11.17= 14

and solving you get:

pH= 14 - 11.17

pH= 2.83

Finally,  replacing this value in the definition of pH:

2.83= -log [H₃O⁺]

and solving you get:

-2.83= log [H₃O⁺]

10⁻² ⁸³= [H₃O⁺]

1.48*10⁻³=  [H₃O⁺]

Answer:

A.- maintaining a positive attitude

Explanation:

The answer is very obvious you need to maintain a positive attitude while studying.

Answer:

A: maintaining a positive attitude

Explanation:

I myself have personal experience with all of these, and B,C,D just don´t seem like reasonable answers. If you wait until the last minute to start an assignment, chances are you won´t get it done. Listening to the television while studing is a pretty bad idea because you might get distracted. Never study when tired because if you´re tired the information might not stick in your head. The only answer left is A.

Answer:

b. aluminum

Explanation:

The specific heat capacity is defined as the amount of heat required to raise the temperature of 1g of a material in 1°C.

Thus, the sample with the higher specific heat capacity is the sample that will require more energy to increase its temperature in 1°C, suffering the smallest change in temperature.

Thus, is the aluminium with 0.900J/gK the element that is most likely to undergo the smallest change in temperature:

In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure, that occurs naturally in pure form.

hope this helps

Answer:

SUBSTANCES

Explanation:

According to this question, Jasmine is conducting an experiment in order to see how much temperature change occurs when three different substances are heated. Based on this experiment, the INDEPENDENT VARIABLE, which is the variable that is changed or manipulated is SUBSTANCES.

A controlled experiment is an experiment where all other variables except the INDEPENDENT VARIABLE is kept the same or unchanged. The independent variable is the only variable allowed to change, which in this case is the SUBSTANCES USED.

Answer:

Melting: solid liquid, Freezing: liquid to solid, Evaporation: liquid to gas.

Explanation:

mark me the brainliest

Answer:

Pain

Explanation:

the pain depends on u banging your head

Answer:

22 electrons are in the compound CO2. And the correct answer is Phosphorus tribromide.

Explanation:

Answer:

A.

Explanation:

I just know.

Answer:

a.

Explanation:

Answer:

1336.4N

Explanation:

Given parameters:

Mass of the sumo wrestler  = 330pounds

Unknown:

Amount of force the earth exerts on the wrestler  = ?

Solution:

The force the earth exerts on the wrestler is the weight of the man;

  Weight  = mg

where;

 m is the mass

 g is the acceleration due to gravity

   Now,

 let us convert from pounds to kg;

          2.2pounds  = 1kg

         300 pounds  = [tex]\frac{300}{2.2}[/tex]   = 136.4kg

Weight  = 136.4kg x 9.8m/s²  = 1336.4N

Answer:

C - show 7 neutrons in the nucleus

Explanation:

Use process of elimination:

-Answer A will not work because electrons are not in the nucleus.

-Answer B will change the atom's identity from nitrogen to fluorine; it will not work.

-Answer D will create a nitrogen ion, which is not what the prompt is asking for (an atom); it will not work.

The only logical answer is C, as that is the only one that is also true.

Answer:

Total heat ≅ 49.07 kJ

Explanation:

Given that:

mass = 1.6 g = 0.016 kg

Initial temperature = - 16 ° C

final temperature = 112° C

specific heat for ice = 2.06 kJ/kgC

specific heat of water = 4.186 kJ/kgC

heat fusion of ice = 334 kJ/kg

specific heat for steam = 2.1 kJ/kgK

heat of vaporization of water = 2256 kJ/kg

To heat ice from -16 ° C to 0 ° C

Q₁ =  2.06 kJ/kgC × 0.016 kg ×  16 ° C

Q₁ =  0.52736 kJ

To melt Ice at 0° C

Q₂= 334 kJ/kg × 0.016 kg = 5.344 kJ

To heat water from 0° C to  100° C

Q₃ = 4.186 kJ/kgC × 0.016 kg  × 100° C

Q₃ = 6.6976 kJ

To vaporize water to steam at 100° C

Q₄ = 2256 kJ/kg × 0.016 kg = 36.096 kJ

To heat steam from 100C to 112° C

Q₅ = 2.1 kJ/kgC × 0.016 kg × 12 C

Q₅ = 0.4032 kJ

Total heat = Q₁ + Q₂ + Q₃ + Q₄  + Q₅

Total heat =  (0.52736 +  5.344 +  6.6976 + 36.096 + 0.4032) kJ

Total heat = 49.06816  kJ

Total heat ≅ 49.07 kJ

answer is both physical and chemical changes

Answer:

ok

Explanation:

Answer:

Average atomic mass  = 85.557 amu.

Explanation:

Given data:

Percent abundance of Rb-85 = 72.15%

Percent abundance of Rb-87 = 27.85%

Average atomic mass = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass = (72.15×85)+(27.85×87) /100

Average atomic mass =  6132.75 + 2422.95 / 100

Average atomic mass = 8555.7 / 100

Average atomic mass  = 85.557 amu.

Answer:

[BaCl₂] = 1.42M

Explanation:

Given:    Na₂SO₄(aq) + BaCl₂(aq) => 2NaCl(aq) + BaSO₄(s)

The balanced equation shows a 1:1 reaction between Na₂SO₄(aq) & BaCl₂(aq) and means the moles of sodium sulfate used equals the moles of baium chloride used. The concentration is the theoretical mole value calculated divided by 0.050 Liters.

Na₂SO₄(aq) + BaCl₂(aq) => 2NaCl(aq) + BaSO₄(s)

Moles of Na₂SO₄(aq) = moles of BaCl₂(aq) = 10.09g/142.04g/mol = 0.071mole

∴ Molar Concentration of BaCl₂(aq) = moles BaCl₂/Volume of Soln in Liters

= 0.071mole/0.050Liters = 1.42M in BaCl₂.  

Answer:

If sunspots are active, more solar flares will result creating an increase in geomagnetic storm activity for Earth.

Explanation:

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