Answer: Molarity of [tex]H_2SO_3[/tex] is 1.2 M.
Explanation:
To calculate the volume of acid, we use the equation given by neutralization reaction:
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1,M_1\text{ and }V_1[/tex] are the n-factor, molarity and volume of acid which is [tex]H_2SO_3[/tex]
[tex]n_2,M_2\text{ and }V_2[/tex] are the n-factor, molarity and volume of base which is [tex]Mg(OH)_2[/tex]
We are given:
[tex]n_1=2\\M_1=?\\V_1=250mL\\n_2=2\\M_2=1.5M\\V_2=200mL[/tex]
Putting values in above equation, we get:
[tex]2\times M_1\times 250=2\times 1.5\times 200\\\\M_1=1.2M[/tex]
Thus molarity of [tex]H_2SO_3[/tex] is 1.2 M if 250 mL of the acid was used to neutralize 200 mL of 1.5 M solution of [tex]Mg(OH)_2[/tex]
which of the following is the most stable isotope?
a. carbon-14
b. uranium-235
c. francium-227
d.plutonium-238
Answer:a. Carbon
Explanation:
What is an inorganic chemical?
O
A. A chemical that makes up living things
O
B. A chemical that is not from living things
O
C. A chemical that does not take part in reactions
O
D. A chemical that contains carbon atoms
What has 6 valence electrons and 16 protons and ends withthe letter "r"
Answer:
Sulphur
Explanation:
Sulphur(S) is the Sixteenth element of the periodic table and it has an electronic configuration of 2,8,6. This means it has six electrons in its outermost shell( valence electrons).
Sulphur has sixteen(16) protons which is equal to the atomic number which is also sixteen. Sulphur ends with the letter ‘r’. All the descriptions of the element are satisfied and it validates Sulphur.
Final answer:
Sulfur, with symbol 'S', is the element with 6 valence electrons and 16 protons, fitting the clue of ending with 'r'.
Explanation:
The element with 6 valence electrons and 16 protons is sulfur, which is represented by the symbol S on the periodic table. Sulfur is in group 16 of the periodic table, which means it has six electrons in its outermost shell. The ending 'r' in the question hints at sulfur's symbol 'S'. This is consistent with the periodic table where elements in group 16, like oxygen (O) and sulfur (S), indeed have six valence electrons. Sulfur is used in a variety of chemical compounds and has numerous applications in both industrial and biological processes.
solution with concentration of 7 mol per L is also denoted as
Answer:7M
Explanation:
There are different methods to express the concentration of a solution. Molarity, mole fraction, normality, molality are some examples. Here 7 mol / L is also called 7 M.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. The molarity of a solution is generally expressed in mol / L which is its SI unit. It can also be represented as M.
The equation that is used to calculate the molarity is:
Molarity = Number of moles of the solute / Volume of the solution in litres
If the mass of the solute (w₂) of molecular mass (M₂) present in VL (or dm³) of the solution, then the molarity is given by:
M = w₂ / M₂ × V
Here the solution 7 mol per L can also be designated as 7 M.
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What is the effect of adding more water to the following equilibrium reaction?
CO2 + H2O —> 2H2CO3
Answer:
The reaction will be driven forward (to the right), creating more 2H2CO3
Explanation:
Reactions maintain balance so if you add more to the left side of the equation, the right side of the equation will increase
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What is green building?
Answer:
Green building is usually referred to as those structures and buildings that are constructed in such a way that it helps in eliminating the negative influences such as pollution, emission of harmful gases in the environment, and in return, positively influences the ecosystem, environment and the climate in any particular place.
Explanation:
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What time of day is it in location A?
A.
sunrise
B.
daytime
C.
nighttime
D.
sunset
Answer:
B
Explanation:
Sunrise would be nearest the line (where B is), nighttime would be where C is, and sunset isn’t shown on the picture at all.
Electrical energy can be transformed into other types of energy. We often experience this transformation of energy in our everyday
lives. In one example the intended energy transformation produces thermal energy. That is the
Answer:
D) the pot
Explanation:
cus it produces thermal energy
What is the name of the “thing” that has antigens on its surface? Where are antigens found on these “things”? Please Help
Answer: Red blood cells is the name of the thing that has antigens on its surface.
Explanation:
The antigens are the molecules which are capable of stimulating an immune response in the body. Based on specific antigen on the surface of RBCs there are separate blood types A, or B. The antigens when inserted into another host organism can activate the antibodies and generate the immune response which can kill the antigens.
The antigens are present on the membranes of the red blood cells.
The number of total electrons of iron is:
a) 55.85
b)29.85
c)26
d)27.78
e) 56
Explain the alignment of Earth, Sun and Moon during a lunar and solar eclipse.
Answer: A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned exactly with the Earth in the middle.
Explanation:
To solve this, we must know each and every concept related to solar eclipse. Therefore, the alignment of Earth, Sun and Moon during a lunar and solar eclipse is sun, earth and moon.
What is solar eclipse?Solar eclipse occurs when the Moon passes between Sun and earth, casting a shadow on the Earth's surface. This shadow is divided into two parts the umbra, a cone that receives no direct sunlight, as well as the penumbra, which receives light from just a portion of the Sun's disk.
A lunar eclipse happens when the Moon transmits behind and into the shadow of the Earth. This can happen only when the earth, sun, and Moon are perfectly aligned, with Earth in the center.
Therefore, the alignment of Earth, Sun and Moon during a lunar and solar eclipse is sun, earth and moon.
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How were all living things classified
Answer:
Classification of Living Things. All living organisms are classified into groups based on very basic, shared characteristics.
Explanation:
Answer:
All living things are classified into kingdoms. Living organisms are classified based on similarities within their DNA, structure, reproduction, and appearance.
Explanation:
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