Answer:
30 hot dogs
Explanation:
It is given that :
There are 4 packets of eight wieners, i.e. 4 x 8 = 32 wieners
There are 3 bags of ten buns, i.e. 3 x 10 = 30 buns
One hot dogs need 1 bun and 1 wiener to make a hot dog.
There are 30 buns, so 30 hot dogs can be made out by using all the 30 buns and the 30 wieners out of the 32 wieners.
Therefore, 30 hot dogs.
And the number of extra wieners left = 32 - 30 = 2 wieners.
Which reaction represents a double replacement reaction?
A
C2H4 + 302 --> 2CO2 + 2H2O
B
NH3 + H20 --> NH4OH
с
CuBr2 + 2K --> 2KBr + Cu
D
2FeCl3 + 3Na2CO3 --> Fe2(CO3)3 + 6Naci
Answer:
D
Explanation:
D shows a double displacment reaction
the other ones show combustion, synthesis and single displacment
The largest pieces being dragged along the streambed are undergoing the process called ________. pushing saltation traction suspension solution
Answer:
saltation
Explanation:
Saltation is the transportation of particles by fluids such as by winds and water. It takes place when loose matter is removed from the sea bed and gets carried by the fluid back to the surface. Examples include pebbles, sand, and soil. Saltation layers can form during avalanches.What is the main function of a nucleic acid?
A. It allows polysaccharides to form.
OB. It stores lipids inside the proteins.
C. It contains instructions for making proteins.
OD. It is a catalyst in chemical reactions.
The main function of nucleic acid is It stores lipids inside the proteins.
Nucleic acidsNucleic acids are large biomolecules that play essential roles in all cells and viruses. A major function of nucleic acids involves the storage and expression of genomic information. Deoxyribonucleic acid, or DNA, encodes the information cells need to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that play multiple cellular roles, including protein synthesis.
Nucleic acids are made of nitrogen-containing bases, phosphate groups, and sugar molecules. Each type of nucleic acid has a distinctive structure and plays a different role in our cells. Researchers who first explored molecules inside the nucleus of cells found a peculiar compound that was not a protein or a lipid or a carbohydrate. It was new. The discovery of this molecule — nuclein, which upon further understanding became nucleic acid — set in motion the eventual discovery of DNA.
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Name the substance which occurs in all the physical states in nature?
Answer: water
For many centuries, it was considered that there were only three states of matter: solid, liquid and gas (the three that are present and stable in our world). And water is the substance that best represents them, because it is the only one that exists naturally in the three states.
Explanation: Matter can exist in one of three main states: solid, liquid, or gas.
Solid matter is composed of tightly packed particles. ...
Liquid matter is made of more loosely packed particles. ...
Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.
Answer:
Water is the only common substance that is naturally found as a solid, liquid or gas. Solids, liquids and gases are known as states of matter.
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Ignore this part unless you want to understand out of your syllabus:
However, if you take into account the fifth state of matter, Bose-Einstein Condensate, which has been recently discovered, there is no substance as such.
Calculate the mass of 0.8 mol of KOH
Answer:
44.8g
Explanation:
molar mass of k= 39, O= 16, H= 1
molecular mass of KOH= 56g/mol
N=m/Mm
0.8=m/56
m= 0.8×56
m= 44.8g
Mass is "a measure of the amount of matter that an object contains".
What is matter?Matter is "any substance that has mass and takes up space by having volume".
The formula to calculate the molar mass is M = m/n
where M is molar mass
m is mass of substance in grams
n is no. of moles of a substance.
The molecular mass of KOH is 56.105 g/mol
molar mass of K= 39, O= 16, H= 1
M = m/n
0.8 = m/56.105
m = 0.8 x 56.105
m = 44.8g
Hence, the mass of 0.8 mol of KOH is 44.8g
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How many atoms in 0.35 moles of Oxygen?
Answer:
11 grams of atoms are in 0.35 moles of oxygen.
what colour is universal indicator when the solution is nuetral?
PLEASE ANSWER ME FAST
Answer:
Green
Explanation:
pH : < 3 = Red
pH : 3 - 6 = Orange or yellow
pH : 7 = Green
pH : 8 - 11 = Blue
A gas at STP occupies 0.055 L of space. If the pressure changes to
2.8 atm and the temperature increases to 195°C, what is the new
volume?
Answer:
0.034 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 0.055 L
Initial pressure (P₁) = stp = 1 atm
Initial temperature (T₁) = stp = 273 K
Final pressure (P₂) = 2.8 atm
Final temperature (T₂) = 195 °C = 195 °C + 273 = 468 K
Final volume (V₂) =?
The final volume of the gas can be obtained as follow:
P₁V₁ / T₁ = P₂V₂ / T₂
1 × 0.055 / 273 = 2.8 × V₂ / 468
0.055 / 273 = 2.8 × V₂ / 468
Cross multiply
273 × 2.8 × V₂ = 0.055 × 468
764.4 × V₂ = 25.74
Divide both side by 764.4
V₂ = 25.74 / 764.4
V₂ = 0.034 L
Therefore, the new volume of the gas is 0.034 L.
The base area of a pyramid is 1,225m2.if the pyramid is 11.3m high,what is it's volume
Answer:
Volume = 4614 m³
Explanation:
The volume of a pyramide is given by the following formula:
Volume = 1/3 * base area * heightWe are already given all the required information to calculate the volume by inputting the data:
Volume = 1/3 * 1225 m² * 11.3 mVolume = 4614 m³The pyramid's volume is 4614 cubic meters.
1. What is the oxidation state of iron in FeC2O4
Answer:
+2
Explanation:
I am first with correct answer
Answer:
the oxidation state of iron in FeC2O4 is +2
Why did the model of the atom change?
A. New materials became available to build better models.
B. The structure of atoms changed over time.
C. Scientists did not like the original model.
D. Experiments provided new evidence about the atom.
Which type of molecule is shown below?
A. Cyclic alkene
B. Alkene
C. Alkyne
D. Cyclic alkane
Answer:
D. Cyclic alkane
Explanation: there is no double or triple bond
The type of molecule that is shown below in the picture is a cyclic alkane. The correct option is D.
What is the cyclic alkane?This is the compound that contain hydrogen and carbon bond. They are mono cyclic saturated hydrocarbons.
These are the atoms that replace the hydrogen atom in an organic compound.
Thus, the correct option is D. Cyclic alkane.
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The carbon-oxygen double bond, or carbonyl, is a key feature of many organic molecules. Two resonance structures can be used to illustrate the properties of the carbonyl structure as provided. In analyzing the minor resonance structure, what can we conclude about the Lewis acid properties of the carbonyl
The question is incomplete, the complete question is shown in the image attached to this answer
Answer:
B
Explanation:
A Lewis acid is specie that has vacant orbitals and is able to accept a lone pair of electrons while a Lewis base is any specie having a lone pair of electrons which can be donated to another chemical specie.
Hence a Lewis acid accepts a lone pair of electrons while a Lewis base donates a lone pair of electrons.
From the resonance structure shown, the carbon atom in the carbonyl compound ought to function as the Lewis acid since it is electrophilic (electron deficient).
Answer: The Carbon atom in the carbonyl will act as a lewis acid and will accept a pair of electrons
Explanation:
In the minor resonance structure for the carbonyl group, we observe a positive formal charge on the carbon atom. Because of its positive formal charge, the carbon atom will act as a Lewis acid and accept a pair of electrons to stabilize that formal charge.
what is the pH of a 2.58 x 10^-6 M solution of an acid?
Answer:
5.59Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ {H}^{+} ][/tex]
From the question we have
[tex]ph = - log(2.58 \times {10}^{ - 6} ) \\ = 5.58838[/tex]
We have the final answer as
5.59Hope this helps you
how many moles of potassium+hydroxide+would+react+with+one+mole+of+hydrocloric acid
Answer:
1 mole of potassium hydroxide, KOH
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
KOH + HCl —> KCl + H₂O
Considering the balanced equation above, we can see clearly that 1 mole of potassium hydroxide, KOH reacted with 1 mole of hydrochloric acid, HCl.
Therefore, we can conclude that at every given point, 1 mole of potassium hydroxide, KOH is required to react with 1 mole of hydrochloric acid, HCl.
Name one major function of the organ systems listed below.
1. Skeletal System
2. Muscular System
3. Digestive System
4. Respiratory System
5. Circulatory System
6. Nervous System
7. Urinary System
Plss help I’ll give u 35 points
The organ system has been defined as the collective working of the organs for performing a specified task. Each organ system has been assigned a major task to be performed.
The function of the following organ systems have been:
Skeletal system: It has been comprised of bones and muscle. The major function of skeletal system has to maintain the body structure, and allow the interaction of muscular system to nervous system.Muscular system: It has been dealing with the voluntary and involuntary muscles. The major function has been the operation of the skeletal system by following the commands from the nervous system.Digestive system: It has been comprised of esophagus, stomach, intestine. The major function has been the breakdown of food and absorption of nutrients.Respiratory system: The respiratory system has been comprised of lungs and trachea. It has a major function of release of harmful gases, as well as oxidation and reduction of the byproducts of glycolysis.Circulatory system: It has been majorly comprises heart. The major function has been purification of blood and transport to different parts of the body.Nervous system: It has been comprised of brain and neurons, the function has been transmission of signals to the stimuli and responsible for conscious and subconscious behavior.Urinary system: The major part has been kidneys and the nephrons. The function has been the filtration of the waste liquid and urination.For more information about organ system, refer to the link:
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How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 4.14 g
Answer:
Explanation:
Given that:
The mass of sodium crystal = 4.14 g
As a result, the number of atoms in the sodium crystal is:
[tex]=4.14 \g \times \dfrac{ 1 \ mol}{23.0 \ g }\times \dfrac{6.023 \times 10^{23} \ atoms}{1 \ mol}[/tex]
= 1.084 × 10²³ atoms
In the valence orbital of the sodium atom, there is just one electron.
As a result, the number of molecular orbitals produced by these atoms is= 1.084 × 10²³ molecular orbital
Because valence bands are created from occupied molecular orbitals, the number of valence bands created from the aforementioned molecular orbitals is:
[tex]= \dfrac{ 1.084 \times 10^{23}}{2}[/tex]
= 5.420 × 10²² orbitals.
what is the colour of litmus in a solution of ammonium hydroxide?
Answer:
Red litmus turns blue
Explanation:
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Alcohols have more hydrogen bonding .
(True or False) ?!
Answer:
True
Explanation:
An alcohol is an organic molecule containing an -O-H group. Any molecule which has a hydrogen atom attached directly to an oxygen or a nitrogen is capable of hydrogen bonding.
What is the volume of a bubble if the original was .25 m^3 at 4 atm and the pressure was reduced to 1 atm?
Answer:
1.00 m^3
Explanation:
Boyles law says that PV = constant, or P1V1=P2V2, while temperature remains constant.
0.25 m^3 *4 atm = V* 1 atm
V = 0.25 m^3 / (1/4)
= 1 m^3
A yellow powder and a blue liquid are shaken together in a test tube to produce a clear green mixture that is all liquid.
Which of the following best describes the behavior of the above pair of substances?
Answer:
hkj
Explanation:
Identify the true statement(s). There may be one answer or more than one answer.FADH2 is a reducing agent. FADH2 is an oxidizing agent. NADH is an oxidizing agent. NADPH is a reducing agent. FAD is an oxidizing agent.
Answer:
FADH2 is a reducing agent.
FAD is an oxidizing agent.
Explanation:
The full form of FAD is flavin adenine dinucleotide. It is mainly a redox-active coenzyme which is associated with the different proteins and is involved with the enzymatic reactions in the metabolism.
FAD is obtained by donating or accepting electrons.
In the citric acid cycle,
succinate + FAD → fumarate + [tex]$FADH_2$[/tex]
Thus we see that FAD is an oxidizing agent while [tex]$FADH_2$[/tex] is a reducing agent.
what is the name of the functional group of pentanoic acid
Answer:
organic acid
Explanation:
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Alkyl carboxylic acid
Valeric acid (pentanoic acid) is a straight-chain alkyl carboxylic acid with a very unpleasant odor. It is found naturally in the perennial flowering plant valerian (Valeriana officinalis), from which it gets its name.
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Calculate the volume occupied
at s.t.p by 6.89
gas [H = 10, N = 14
Answer:
9.07 L
Explanation:
Calculate the volume occupied at s.t.p by 6.89 g of NH₃ gas [H = 1.0, N = 14.0].
Step 1: Given and required data
Mass of NH₃ (m): 6.89 gMolar mass of NH₃ (M): 17.0 g/molStep 2: Calculate the moles (n) of NH₃
We will use the following epxression.
n = m / M
n = 6.89 g / (17.0 g/mol) = 0.405 mol
Step 3: Calculate the volume occupied by 0.405 moles of NH₃ at STP
At STP, 1 mole of NH₃ occupies 22.4 L (assuming ideal behavior).
0.405 mol × 22.4 L/1 mol = 9.07 L
Balance the following equation by LCM method.Mg + H2O = Mg(OH)2 + H2
Answer:
Mg + 2H₂O —> Mg(OH)₂ + H₂
Explanation:
Mg + H₂O —> Mg(OH)₂ + H₂
The above equation can be balance as illustrated below:
Mg + H₂O —> Mg(OH)₂ + H₂
There are 2 atoms of H on the left side and a total of 4 atoms on the right side. It can be balance by writing 2 before H₂O as shown below:
Mg + 2H₂O —> Mg(OH)₂ + H₂
Now, the equation is balanced
****Check***
Element >>>>> Reactant >>>> Product
Mg >>>>>>>>>> 1 >>>>>>>>>>> 1
H >>>>>>>>>>> 4 >>>>>>>>>>> 4
O >>>>>>>>>>> 2 >>>>>>>>>>> 2
The balanced equation of Mg + H2O = Mg(OH)2 + H2 is given as
Mg + 2H₂O —> Mg(OH)₂ + H₂
What is the balance equation?Generally, the equation for the Chemical equation is mathematically given as
Mg + H₂O —> Mg(OH)₂ + H₂
Therefore, We se that we have on the LHS
Mg=1
H=2
O=1
and on The RHS
Mg=1
H=4
O=2
Therefore to balance, we add 2 to H and 1 to O giving
Mg + 2H₂O —> Mg(OH)₂ + H₂
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What is the pH if the [H+] concentration is 3 x10^-13
Answer:
pH = 12.52
Explanation:
Given that,
The [H+] concentration is [tex]3\times 10^{-13}[/tex].
We need to find its pH.
We know that, the definition of pH is as follows :
[tex]pH=-log[H^+][/tex]
Put all the values,
[tex]pH=-log[3\times 10^{-13}]\\\\pH=12.52[/tex]
So, the pH is 12.52.
You have made a 2.5 molar solution (2.5 moles per liter) of a particular chemical. If the molecular weight of the chemical is 28 g (28 g/mol), how many kg of the chemical are dissolved in 1 L of this solution
Answer:
Mass of solute in Kg = 0.07 Kg
Explanation:
Given
Molecular weight of the chemical = 28 grams per mole
Solution consists of 2.5 moles of solution
Mass of solute in the solution = 2.5 *28 = 70 grams
Mass of solute in Kg = 70 grams/1000 = 0.07 Kg
A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the name of the hydrate
Answer:
The correct answer is MgCO₃.5H₂O.
Explanation:
Based on the given information,
The mass of hydrate of magnesium carbonate given is 15.67 grams, and the mass of anhydrous magnesium carbonate given is 7.58 grams.
Now the mass of water will be,
= 15.67 grams – 7.58 grams
= 8.09 grams
The molecular mass of magnesium carbonate is 84.32 grams, the moles of MgCO₃ can be determined by using the formula,
Number of moles = Mass/Molecular mass
Moles of MgCO₃ = 7.58/84.32
= 0.0898 moles
Similarly, the number of moles of water will be,
Moles of H₂O = 8.099/18.02
= 0.4489 moles
After getting the values, there is a need to choose the smaller value and use it to divide both the values to get the ratio,
MgCO₃ = 0.0898/0.0898 = 1
H₂O = 0.4489/0.0898 = 4.9 or 5
Thus, the molecular formula for the hydrate will be MgCO₃.5H₂O.
which is best illustrated by Watson and Crick's ball and stick model of dna
Answer:
Here is your Answer.......
Explanation:
The Watson and Crick's ball-and-stick model of DNA best illustrates the role of creativity in scientific discovery
he correct statements about thermal conductivity are: A. The thermal conductivity of metals is generally higher than that of liquids. B. The thermal conductivity of solids is generally higher than that of liquids. C. The thermal conductivity of gases is generally higher than that of liquids.
Answer: The correct statements about thermal conductivity are:
The thermal conductivity of metals is generally higher than that of liquids.The thermal conductivity of solids is generally higher than that of liquids.Explanation:
The rate at which transfer of heat takes place from one object to another by conduction over a unit cross section area of a material is called thermal conductivity.
Hence, more is the distance between atoms of a substance less will be its thermal conductivity. This is because more is the space between molecules of a substance more will be their random motion due to which there will be less effective energy transport.
The thermal conductivity of metals is very high than liquids.
Also, the thermal conductivity of solids is generally higher than that of liquids.
As gases have more space between its molecules so they have less thermal conductivity.
Thus, we can conclude that the correct statements about thermal conductivity are:
The thermal conductivity of metals is generally higher than that of liquids.The thermal conductivity of solids is generally higher than that of liquids.