Part A
What question is being asked through this scientific investigation?
(I didn’t know what subject so sorry, also only answer if u have an answer.)

Answer:

i think it is FALSE.

Explanation:

good luck

Answer:

D

Explanation:

braineist pls???????????

Answer:

C

Explanation:

gram is bigger than atom duh

If 25.0ml neutralizes 35.0 ml of a 0.200M HCl solution, the molarity of KOH solution is 0.28M

The reaction between KOH solution and HCl is written below.

[tex]HCl + KOH \rightarrow KCl + H_2O[/tex]

Volume of KOH, [tex]V_B[/tex] = 25.0 ml

Volume of HCl, [tex]V_A=35.0 ml[/tex]

Molarity of HCl, [tex]C_A=0.200 M[/tex]

Molarity of KOH, [tex]C_B=?[/tex]

Number of moles of HCl, [tex]n_A=1[/tex]

Number of moles of KOH, [tex]n_B=1[/tex]

The mathematical equation for neutralization reaction is:

[tex]\frac{C_AV_A}{C_BV_B} =\frac{n_A}{n_B}[/tex]

Substitute  [tex]C_A=0.200 M[/tex],  [tex]n_A=1[/tex],  [tex]n_B=1[/tex],  [tex]V_B[/tex] = 25.0 ml, and  [tex]V_A=35.0 ml[/tex] into the equation above in order to solve for [tex]C_B[/tex]

[tex]\frac{0.2 \times 35}{C_B \times 25}=\frac{1}{1} \\\\25C_B=7\\\\C_B=\frac{7}{25} \\\\C_B=0.28M[/tex]

Therefore, the molarity of KOH solution is 0.28M

Learn more on molarity here: https://brainly.com/question/17138838

Answer:

B. atomic mass

Explanation:

He arranged the elements into rows in order of increasing mass so that elements with similar properties were in the same column.

Answer:

Chemical bonds

Explanation:

Chemical bonds are forces that hold atoms together to make compounds or molecules. Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds.

Answer:

1.81 x [tex]10^{24}[/tex] molecules H2

Explanation:

Use Avogadro's number:

3 moles H2 x 6.022 x [tex]10^{23}[/tex] molecules= 1.81 x [tex]10^{24}[/tex] molecules H2

Answer:

B is correct.

Explanation:

A vaccination will trigger the organism to prepare antibodies as a measure of protection against a sickness.

Answer:

Amerigo Vespucci, was the first European to reach the Caribbean Islands.

Please select the best answer from the choices provided

T

F

Explanation:

A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously.

[tex] \large \sf \pink{hopefully ♡♡}[/tex]

To solve this we must be knowing each and every concept related to  lymph node. Therefore, the correct option is option D among all the given options.

A lymph node, sometimes known as a lymphatic gland, is indeed a kidney-shaped lymphatic and immune system component. The lymphatic veins connect a massive amount of lymph nodes to one another throughout the body.

Most lymph nodes lie within the trunk adjacent to other major structures in the body - such as the paraaortic lymph nodes and the tracheobronchial lymph nodes. The lymphatic drainage patterns are different from person to person and even asymmetrical on each side of the same body. Bacteria and dead cells are removed from circulatory fluid in the lymph nodes.

Therefore, the correct option is option D.

To know more about lymph nodes, here:

https://brainly.com/question/29829253

#SPJ2

Answer:

Explanation:

1) The vertical Columns are called groups and the Horizontal rows are

called periods.

2) Elements in the same groups have the same number of electrons in their

outer Shells for example, all the elements in Group VII have 7

electrons on their outer shells.

3) Elements in the same group have similar Chemical and physical properties

Explanation:

1) Columns

Horizontal

2)Shell

Group VII

3)Chemical

Answer:

17.19%

Explanation:

mass of oxygen = 7.221 - (1.990 + 2.341)

= 2.890g

Empirical formula of the compound

For carbon,

1.990/12 = 0.1658

For hydrogen,

2.341/1 = 2.341

For oxygen,

2.890/16 = 0.1806

0.1658 ÷ 0.1658 = 1

2.341 ÷ 0.1658 = 14.11

0.1806 ÷ 0.1658 = 1.089

Empirical formula of the compound= CH14O

Molar mass= (1×12) + (14×1) + (1×16)

= 12+14+16

= 42g/mol

percentage composition= 7.221/42 × 100

= 17.19%

Answer:

what is your question tell may i can help you

Answer:

decrease as we go down a group I know ionisation energy increases from left to right across the periodic table

Answer:

[tex]\huge\color{magenta}\boxed{\colorbox{skyblue}{Answer ☘}}[/tex]

thє ѕuвѕtαncєѕ thαt cσnduct єlєctrícítч αrє cαllєd cσnductσrѕ.

thє єхαmplєѕ σf cσnductσrѕ αrє -

hσpє hєlpful~

Answer:

There are two categories of materials that are good conductors of electricity: metals and plastics. Metals conduct in the solid state because they contain mobile electrons, or electrons that may move about freely. When a copper wire is utilized in an electrical circuit, electrons pass through it every time the switch is flipped...

Explanation:

Answer:

As a substance changes from a solid to a liquid to a gas, its molecules first the molecules are moving fast enough, they are able to "escape." They leave the surface of the liquid as gas molecules. Evaporation is not the only process that can change a substance from a liquid to a gas. The same change can occur through boiling.

Explanation:

hopfully this helps!

Answer:

A reactant is a substance that is present at the start of a chemical reaction. A product is a substance that is present at the end of a chemical reaction.

Explanation:

Answer: The answer is 6  

1) Simplify  -3+6  to  3.

2×3

And then Simplify.

6

Sorry if im wrong

Answer:

the Aluminium Al have +3 charges and idion have I) have - 2 charges

Answer:

5.24 x 10^23

Explanation:

Avogadro's constant is 6.02 x 10^23

1 mol = 6.02 x 10^23

0.87 mol = 6.02 x 10^23 x 0.87 = 5.24 x 10^23 (2.d.p)

Answer:

a theory of a experiment and the experiment acts like a judge determining if the hypothesis is right or wrong from the final test result

Explanation:

Answer:

e. Mg.

Explanation:

Answer:

[tex]mg[/tex]

is the answer to your question

The 10 karat of gold formed by melting gold with other metals is described as homogeneous mixture.

A pure substance is a substance that is made up of only one kind of particle. This type of substance consist of only one element.

A heterogeneous substance is a type of substance that is made up two or more substances existing in different phases.

A homogeneous substance is a type of substance that is made up of two or more substances evenly mixed. This type of substance exist only in one phase.

Thus, the 10 karat of gold formed by melting gold with other metals is described as homogeneous mixture.

Learn more about homogeneous mixture here: https://brainly.com/question/10677519

Answer:

homogeneous mixture

Explanation:

Answer:

they are produced by the body in response to the presence of foreign substance

Answer:

Magnesium Nitrate is an ionic compound formed by:

Magnesium;Mg+2 (the cation) and Nitrate NO−3 (the poly-atomic anion).

In order for these two ions to bond, the charges must be equal and opposite. Therefore, it will take:

     two -1 nitrate ions to balance the one +2 magnesium ion.

Answer:

The answer is San Jose

Answer: 5.5 7.5 102

Explanation: using the equation above you can get these %s

Answer:

The pressure of 16.25 moles of methane = 40 atm

Explanation: there you go

Answer:

Explanation:

how do u draw on here