That would be...*drumroll* the structure of DNA!
explain the bonding nature in NaCl with diagram
Explanation:
NaCl is the compound that we want to know the Bonding structure of
in chemistry when a metal (Na) combines with a non metal (Cl) it is know as an ionic compounds
the type of bonding in ionic compounds is an ionic bond
The pressure of a gas sample was measured to be 654 mmhg. What is the pressure in kpa? (1 atm = 1. 01325 × 10 5 pa)
Taking into account the change of units, the pressure of the gas sample is 87.19 kPa.
What is rule of threeIn first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.
To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: [tex]c=\frac{cxb}{a}[/tex]
PressureThe direct rule of three is the rule applied in this case where there is a change of units.
To perform in this case the conversion of units, you must first know that:
1 atm= 760 mmHg1 atm = 1. 01325×10⁵ Pa= 101325 Pa1 kPa= 1000 PaSo, if 1 atm is 760 mmHg, how many atm equals 654 mmHg?
760 mmHg ⇒ 1 atm
654 mmHg ⇒ x
So: [tex]x=\frac{654 mmHgx1 atm}{760 mmHg}[/tex]
Solving:
x=0.86 atm
Now, if 101325 Pa are 1 atm, how many Pa equals 0.86 atm?
1 atm ⇒ 101325 Pa
0.86 atm ⇒ x
So: [tex]x=\frac{0.86 atmx101325 Pa}{1 atm}[/tex]
Solving:
x= 87,192.83 Pa
Finally, if 1 kPa is 1000 Pa, how many kPa equals 87,192.83 Pa?
1000 Pa ⇒ 1 kPa
87,192.83 Pa ⇒ x
So: [tex]x=\frac{87,192.83 Pax1 kPa}{1000 Pa}[/tex]
Solving:
x=87.19283 kPa≅ 87.19 kPa
In summary, the pressure of the gas sample is 87.19 kPa.
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Which is the correctly balanced chemical equation for the reaction of KOH and H₂SO4?
OKOH H₂SO4 →K*+50²-
2KOH+H₂SO4 → K₂SO4
2KOH+H₂SO4 → K₂SO4+2H₂O
4
OKOH H₂SO4 → K₂SO4 →H₂O
Answer:
2KOH + H2SO4 > K2SO4 + 2H2O
Explanation:
firstly the order speaks, you can't have something like OKOH so the other two is eliminated. Then check if the remaining reactions balance
The correctly balanced chemical equation for the reaction of KOH and H₂SO₄ is 2 KOH+H₂SO₄ → K₂SO₄+2 H₂O.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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In desperate need of help!!!!!!!
Answer:
The answer will be false.
Explanation:
because it is not balanced.
Specific heat capacity is measured in _____.
Answer: Specific heat capacity is measured in J/g℃.
Explanation:
The specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.
Another thing you should know about specific heat capacity is its formula. The formula of specific heat capacity is: C= [tex]\frac{q}{m}[/tex]×ΔT
In the formula, q is the heat gained or lost by the system (measured in joules), m is the mass of the sample in grams, and △T is the temperature's change in ℃.
I hope this helps! Pls mark brainliest!! :)
PLS HELP ME ASAP ILL GIVE BRAINLIEST
Which statement best describes how a Geiger counter works?
Select one:
a. Water vapor condenses along a path traveled by ionizing radiation.
b. Particles ionized by radiation cause black streaks to appear on sensitive photographic paper.
c. Radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.
d. A material sensitive to radioactive emissions glows when mixed with a radioactive substance.
Answer:
the answer is c
Explanation:
c. Radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.
Which of the following species of fish have cartilaginous skeletons?
Answer:
sharks have cartilaginous skeletons
Explanation:
Sharks are an example
What is the equilibrium expression for:
fe3o4(s) + 4h2(g) <=> 3fe(s) + 4h2o(g)
kc =
a)[fe]3 [h2o]4 / [fe3o4] [h2]4
b)[fe3o4] [h2]4 / [fe]3 [h2o]4
c)[h2o]4 / [h2]4
d)[fe] [h2o] / [fe3o4] [h2]
Answer:
c
Explanation:
in kc we only consider gases and aquas not solids and liquids
What does a high number on the pH scale say about a solution?
OA. The solution is basic.
OB. The solution is hot.
C. The solution is neutral.
OD. The solution is acidic.
Explanation:
A is cortect answer dsfa
What do scientists and engineers have in common?
Answer:
Engineers and scientists both use methods of science and facts.
Explanation:
They often use Math and computer in calculations.
Answer:
Scientists and engineers both use the facts and methods of science, and both often use MATH and COMPUTERS in their work.
Explanation:
An atom is neutral because it has the same number of electrons as it has???????????????????????????????????????????????????????????
Answer:
protons
Explanation:
the protons and electrons of an element are the same amount however the neutrons are a different amount
Ethanoic acid reacts with ethanol to form an ester and water. How many moles of ethanoic acid are required to produce 0.5 mol of the ester? (A) 0.05 (B) 0.5 (C) 1 (D) 2
0.5 moles of ethanoic acid are required to produce 0.5 mol of the ester , Option B is the right answer.
What is esterification reaction ?The reaction in which a carboxylic acid combine with an alcohol to form ester and water is called esterification reaction.
It is given in the question that
Ethanoic acid reacts with ethanol to form an ester and water
C₂H₅OH + CH₃COOH → CH₃COOH + H₂O
The moles of ethanoic acid required to produce 0.5 mole of ester.
In the following reaction it can be seen that the mole fraction of ethanoic acid to ester is 1: 1
Therefore 0.5 mole of ethanoic acid will be required to produce 0.5 mol of ester.
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Two persons are not equally strong. One is weaker than another. They are going to carry a wooden coat poole Suggest them the w a way to cargy. a wooden pole. In such a way stronger person needs to apple-apply more effort and the weakes person need to apply less force. Explain with scientific reason.
Answer:
The two men can arrange a position such as the center of gravity must be nearer the stronger man and the weaker man must be away from the center of gravity of the wooden pole.
In plain language, the stronger man must be near the center while the weaker man must be away from the center of the wooden pole.
Explanation:
I am sachhyam lama
from nepal
my teacher wrote this answer thats why I wrote the answer
15. What will be the volume of a given mass of oxygen at 250C if it occupies 100cm3 at 150C.? (Pressure remain constant)
Answer:
V₂ = 167 cm₃
Explanation:
Because you are only dealing with volume and temperature, you can use Charles' Law to find the missing value. This formula looks like this:
V₁ / T₁ = V₂ / T₂
In this formula, "V₁" and "T₁" represent the initial volume and temperature. "V₂" and "T₂" represent the final volume and temperature. You have been given values for all of the variables except for final volume. Therefore, by plugging these values into the formula, you can simplify to find your answer.
V₁ = 100 cm³ T₁ = 150 °C
V₂ = ? T₂ = 250 °C
V₁ / T₁ = V₂ / T₂ <---- Charles' Law formula
(100 cm³) / (150 °C) = V₂ / (250 °C) <---- Insert values
(0.667) = V₂ / (250 °C) <---- Simplify left side
(0.667) x (250 °C) = V₂ <---- Rearrange
167 = V₂ <---- Simplify left side
How many molecules of SF6
are in 25.0 g SF6?
[ ? ]×10⁰²] molecules SF6
SF₆
Molar mass: 146.06 g/mol
mole = 25 : 146.06 = 0.171
molecules:
=0.171 x 6.02 x 10²³
=1.03 x 10²³
If a gas occupies 1532.7 mL at standard temperature, what volume does it occupy at 49.4 ºC if the pressure remains constant?
a. 1810
b. 1300
c. 276
d. 3.80e5
Answer:
a. 1810mL
Explanation:
When conditions for a gas change under constant pressure (and the number of molecules doesn't change), it follows Charles' Law:
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex] where the temperatures must be measured in Kelvin
To convert from Celsius to Kelvin, add 273, or use the equation: [tex]T_C+273=T_K[/tex]
For this problem, one must also recall that standard temperature is 0°C (or 273K).
So, [tex]T_1 = 273[K][/tex], and [tex]T_2 = (49.4+273)[K]=322.4[K][/tex].
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
[tex]\dfrac{(1532.7[mL])}{(273[K])}=\dfrac{V_2}{(322.4[K])}[/tex]
[tex]\dfrac{(1532.7[mL])}{(273[K\!\!\!\!\!{-}])}(322.4[K\!\!\!\!\!{-}] )=\dfrac{V_2}{(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})}(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})[/tex]
[tex]1810.04571428[mL]=V_2[/tex]
Adjusting for significant figures, this gives [tex]V_2=1810[mL][/tex]
How many calories are in a
banana containing 410 kJ of
energy?
[? ] cal
Number of calories that are in a banana containing 410 kJ of energy are 97619.04 Calories.
What is Energy?The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.
Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.
Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.
1 calorie of energy has 0.0042 Kilo Joules.
97619.04 Calories of energy will be present in 410 KJ.
Therefore, Number of calories that are in a banana containing 410 kJ of energy are 97619.04 Calories.
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Hydrogen and Oxygen will have ______ properties after they bond to become water.
A. only the dominant element’s
B. both of their original
C. the same
D. completely new
How does separating CHEMICALS through DISTILLATION harm the environment ?
Explain in your own words
Explanation:
Distillation is the separation of mixture of two liquids which differ in boiling point. Through Distillation vapour that is formed spread thoroughly in our environment
Ripening is a _______________ and spoiling is a ______________.
A. Chemical reaction, chemical reaction.
B. Physical reaction, chemical reaction.
C. Physical reaction, physical reaction.
D. Chemical reaction, physical reaction.
Answer:
A
Explanation:
The answer to this question is A. Both ripening and spoiling are chemical reactions.
Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.
Ripening of fruits is a chemical change. For example the colour could change as well as the texture.
Answer:
option a) chemical reaction, chemical reaction.
Explanation:
Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.
2. Metals react with water and release hydrogen gas. Explain why non-metals do not release hydrogen gas when reacted with water.
Answer:
Its because non-metals are unable to break the bond between the H and O ion and cannot reduce hydrogen by donating electrons
According to the phase diagram for H₂O, what happens to the phases of
water at 0°C as the pressure is increased from 0 atm to 10 atm?
Answer:
"A", "water changes from a gas to a solid to a liquid", according to this phase diagram, at at 0°C, as pressure is increased from 0atm to 10atm.
Explanation:
The question asks what happens at 0°C, as pressure is increased from 0atm to 10atm.
According to the question, the temperature is held constant. The pressure changes. In the phase diagram, we find the temperature 0°C on the horizontal axis, and all points where the temperature are 0°C are along that vertical line.
Since the pressure starts at 0atm and increases to 10atm, we start at the bottom, and move upward along that line, to see what phases of matter the substance changes to.
At the bottom, it is initially in a "gas" phase. As it moves up, it transitions to a "solid" phase. Later, as it continues moving up, it changes again into a "liquid" phase.
Thus, the answer would be "A", "water changes from a gas to a solid to a liquid", according to this phase diagram, at at 0°C, as pressure is increased from 0atm to 10atm.
We know the sun is primarily made from hydrogen and helium on the basis of its:
We know the sun is primarily made from hydrogen and helium on the basis of its spectrum.
What is Sun's spectrum?Sun's spectrum refers to the light of the Sun whose wavelength spectra can be used to identify atomic composition.
Thus spectrum (Sun's spectrum) initiates with the red light (700 nm) and ends with the blue (380 nm).
In conclusion, we know the sun is primarily made from hydrogen and helium on the basis of its spectrum.
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The empirical formula for a compound shows the symbols of the elements with subscripts indicating the
Select one:
A) actual numbers of atoms in a molecule.
B)numbers of moles of the compound in 100 grams.
C)smallest whole-number ratio of atoms.
D) atomic masses of each element
Answer:
smallest whole number ratios of atoms
How many hydrogen bonds will be found within an alpha helix that is 18 amino acids long?.
An alpha helix which is 18 amino acids long will have 12 hydrogen bonds.
What is alpha helix (α-helix) ?The alpha helix (α-helix) is a common in the secondary structure of proteins and is a right hand-helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O. group of the amino acid located four residues earlier along the protein sequence.
The alpha helix is stabilized by hydrogen bonds (shown as dashed lines) from the carbonyl oxygen of one amino acid to the amino group of a second amino acid.
Because the amino acids connected by each hydrogen bond are four apart in the primary sequence, these main chain hydrogen bonds are called "n to n+4.
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the pressure of a gas depends on the ____ and ____ of the gas.
Answer:
Temperature and Volume
Explanation:
PV = n R T
P = n R T / V pressure depends on the temperature and volume
The pressure of a gas depends on the temperature and volume of the gas.
Ideal gas equationPV = nRT
Where
P is the pressureV is the volumen is the number of moleR is the gas constantT is the temperatureFrom the equation given above, we obtained the following:
PV = nRT
Divide both sides by V
P = nRT / V
R is constant and n = 1
P = T / V
Thus, we can see that the pressure (P) is dependent on the temperature (T) and the volume (V)
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1
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3
4
5
6 7 8 9 10
If the density and volume of an object is known, what can also be found?
the mass of the object
O the shape of the object
the size of the object
the thickness of the object
What is the complete ionic equation for NaOH(aq) + HCl(aq) → H₂O()) + NaCl(aq)?
Answer:
OH-(aq)+H+(aq)->H2O(l)
Answer is shown in photo.
Explanation :
APEX
a sample of helium gas has a volume of 1.00 l. what is the final volume if both the pressure and kelvin temperature each double?
Since the helium gas has a volume of 1.00 L, the final volume of the helium gas is 1.00 L
To find the volume, we need to know the general gas law.
What is the general gas law?The general gas law is given by P₁V₁/T₁ = P₂V₂/T₂ where
P₁ = initial pressure of gas, V₁ = initial volume of gas, T₁ = initial temperature of gas in Kelvin, P₂ = final pressure of gas, V₁ = final volume of gas, andT₁ = final temperature of gas in KelvinFinal volume of helium gasSo, making V₂ subject of the formula, we have
V₂ = P₁V₁T₂/T₁P₂
Since the sample of helium gas has a volume of 1.00 L and both the pressure and kelvin temperature each double, we need to find its final volume.
So,
P₂ = 2P₁, T₂ = 2T₁ and V₁ = 1.00 LSo, substituting the values of the variables into the equation, we have
V₂ = P₁V₁T₂/T₁P₂
V₂ = P₁V₁ × 2T₁/T₁ × 2P₁
V₂ = V₁
V₂ = 1.00 L
So, the final volume of the helium gas is 1.00 L
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When molten magma rises to the surface it cools ________, forming ________ igneous rocks.
A. slowly, extrusive
B. slowly, intrusive
C. rapidly, intrusive
D. rapidly, extrusive
Answer:
B)Slowly, intrusive
