Answers
Answer:
c + H + O x 2
12 + 1 + 32
45 is your molecular formula
Related Questions
In alkanes with three or fewer carbon atoms,
a. the chains can be straight or branched.
b. usually one but sometimes more than one molecular structure is possible.
c. structural isomers exist.
d. only one molecular structure is possible.
Answers
Answer: Only one molecular structure is possible.
What phase of matter is shown here
Answers
Answer:
air
Explanation:
Which of the following technique is used to purify the impurities that are not very different in chemical properties of element? [a] Gas chromatography [b] Column chromatography [c] TLC [d] HPLC
Answers
Answer:
Explanation: Liquid Chromatography
I'm sorry if i'm wrong
which is the graph of the function g(x) = f(-x)
Answers
To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.
What is a graph of the function g(x) = f(-x)?To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.
If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).
However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.
In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.
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what are the two components present in the colloid
Answers
Answer:
the two components in colloid are dispersed phase and dispersing medium
I hope this helps
Let's do this!
Balance each equation so there are the same number of each type of atom on both sides of the
equation There is a chart above each problem to help you count the atoms
First-Count up the
number of atoms you
currently have Write
that number in the
chart for both sides of
the equation
Second-If the
numbers don't match,
try adjusting the
coefficients one at at
time Make sure to
change the number in
the chart
Remember- you can't
change the formulas!
2
Reactants
Mg
M
Mg
LI
Reactants
H
LO +
Products
Mg
N
L
O
H
но →
_Math
Products
LIOH
You should
do this in
pencil
Answers
The balanced chemical equations of the reactions are given below:
1. Mg (s) + 2 H₂O (l) ----> Mg(OH)₂ (s) + H₂ (g)
2. 2 Li (s) + 2 H₂O (l) ----> LiOH (aq) + H₂ (g)
What is a balanced equation?A balanced chemical equation is an equation in which the number of moles of atoms of elements in a given reaction is equal to the sum of the number of moles of atoms of each element that is produced.
A balanced chemical equation is in accordance with the law of conservation of mass which states that matter can neither be created nor destroyed.
When balancing chemical equations, numerical coefficients are added in front of moles of atoms of an element or moles of a given compound taking part in the reaction.
The balanced chemical equation of the reaction of magnesium and water as well as the reaction of lithium and water is given below:
Magnesium and water:
Mg (s) + 2 H₂O (l) ----> Mg(OH)₂ (s) + H₂ (g)
Lithium and water:
2 Li (s) + 2 H₂O (l) ----> LiOH (aq) + H₂ (g)
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the respiratory system includes a layer of cells in the air passage that clean the air before it gets to the lungs.this layer of cells if best classified as
Answers
Answer:
This layer of cells is best classified as a tissue.
Explanation:
When a group of cells comes together to perform a specific function, they are called tissues. It's when a group of tissues comes together to perform a specified function that they become an organ.
Freezing point depression is a colligative property.The freezing point of pure water is 0.0°C. How many grams of ethylene glycol (C2H6O2) must be mixed in 100.0 g of water to lower the freezing point of the solution to -4.3°C?_______ g
Answers
Explanation:
The freezing point depression is a colligative property. We have to find the mass of ethylene glycol that we have to add to 100.0 g of water to change its freezing point from 0.0 °C to -4.3 °C.
The freezing point depression for a solution can be calculated using the following equation:
ΔTf = kf * molality * i
Where ΔTf is the freezing point depression, kf is the freezing point depression constant (it depends on the solvent and for water is 1.86 °C/m), molality is the molality of the solution and i is the Van't Hoff factor.
The Van't Hoff factor represents the number of particles formed when that compound dissolves. In our case the solute is ethylene glycol, a covalent compound, so it won't form ions when dissolved in the water. Then i is equal to 1.
The temperature must change from 0.0 °C to -4.3 °C, then the freezing point depression is 4.3 °C. So we know that:
i = 1 kf = 1.86 °C/m ΔTf = 4.3 °C
We can replace those values in the formula and find the molality of the solution.
ΔTf = kf * molality * i
4.3 °C = 1.86 °C/m * molality * 1
molality = 4.3 °C/(1.86 °C/m)
molality = 2.31 m
Now we can get the moles of ethylene glycol from the definition of the molal concentration. Molality are the moles of solute per kg of solvent. The mass of water is 100 g.
mass of solvent = 100.0 g * 1 kg/(1000 g)
mass of solvent = 0.100 kg
molality = moles of solute/(mass of solvent in kg)
moles of solute = molality * mass of solvent in kg
moles of solute = 2.31 m * 0.100 kg
moles of solute = 0.231 moles
And finally we can convert the moles of ethylene glycol to grams using its molar mass.
molar mass of C₂H₆O₂ = 62.07 g/mol
mass of C₂H₆O₂ = 0.231 moles * 62.07 g/mol
mass of C₂H₆O₂ = 14.4 g
Answer: 14.4 g of ethylene glycol must be mixed.
How would the Coriolis effect alter movement of an air mass flowing from a higher?; How does the Coriolis effect affect air travel?; What happens to the Coriolis effect at high latitudes?; How does the Coriolis effect relate to high and low pressure?
Answers
A liquid moving over a large area such as the air currents is like the trajectory of a ball. It appears to bend to the right in the northern hemisphere. In the Southern Hemisphere, the Coriolis effect is reversed, and ocean currents appear to bend to the left.
Coastal currents are influenced by local winds. Surface currents that occur in the open ocean are driven by complex global wind systems. To understand how wind affects ocean currents, we first need to understand the Coriolis force and the Ekman spiral.
If the Earth was stationary and did not rotate, the atmosphere would circulate in a simple back-and-forth pattern between the poles (regions of high pressure) and the equator (regions of low pressure).
However, because the Earth rotates, the circulating air is deflected. Instead of circulating in a straight line pattern, air is deflected to the right in the northern hemisphere and to the left in the southern hemisphere, curving its path. This deflection is called the Coriolis effect.
It is named after the French mathematician Gaspar Gustave des Coriolis (1792-1843), who studied energy transfer in rotating systems such as water wheels.
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1. Describe a situation in which you might need to convert the units of a measurement, and
what information you would need to do so.
Answers
What is impossible for a machine to do?
do a greater amount of work than the amount of work done on the machine
apply a force in a direction that is different than the direction of the force applied to the machine
move an object a greater distance than the distance that part of the machine was moved
apply a force that is less than the force that is applied to the machine
Answers
Doing a greater amount of work than the of work done on the machine is impossible for a machine to do. The energy given the system might loss some fraction and cannot be converted completely to output work.
What is work done ?Work done is a physical quantity that describes the result of a force or how effectively the force made a displacement. The force applied on a body if results in a displacement of the body, the force is said to be done work on the body.
Work done is a vector quantity, having both magnitude and direction. According to thermodynamic concept, then it is impossible to convert all the input energy into work done.
It is impossible to achieve a 100% of efficiency or more by a machine. Hence, doing greater amount of work than the input is impossible for a machine.
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Answer:
A or do a greater amount of work than the amount of work done on the machine
Explanation:
Bc i did the test in edge
Help me please.
How do animals see their pray without light?
Answers
Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.
Explanation:
PLZ HELP ASAP
Which would increase the reaction rate?
Check all that apply.
A. Stirring the reaction
B. Raising the activation energy
O C. Adding a catalyst
D. Raising the temperature
Answers
Answer:
adding a catalyst will increase the reaction rate.
Explanation:
im like 95% sure thats right.
Answer:
A. C. D
Explanation:
ap ex
Gaseous iodine pentafluoride, IF₅, can be prepared by the reaction of solid iodine and gaseous fluorine: I₂(s) + 5F₂(g) → 2IF₅(g) A 10.00 L flask is charged with 15.0 grams of I₂ and 2.00 atm of F₂ at 25 °C. The flask is heated to 100 °C until one of the reagents is completely consumed. What will be the percentage of IF₅ (by mole) in the final product mixture? (Assume ideal gas behavior).
Answers
Answer:
The percentage of IF₅ (by mole) in the final product mixture will be 50%. This is determined by the stoichiometry of the reaction, the given molar mass of the reactants, and the ideal gas law.
Explanation:
Can someone please help me with this question. I got half of the question and I am stuck on the rest.
Answers
The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].
What is the mean and 90% confidence interval of the given data?The sample mean (x) is calculated as follows:
x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6
x ≈ 4.0626 (rounded to four decimal places)
The 90% confidence interval is calculated as follows;
Standard deviation (s):
(4.0620 - 4.0626)² = 0.00000036
(4.0550 - 4.0626)² = 0.00000576
(4.0650 - 4.0626)² = 0.00000006
(4.0740 - 4.0626)² = 0.00001328
(4.0550 - 4.0626)² = 0.00000576
(4.0660 - 4.0626)² = 0.00000012
average of the squared differences:
(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624
s = √(0.00000624)
s ≈ 0.002496
the standard error of the mean (SEM):
SEM = 0.002496 / √6
SEM ≈ 0.001018
For a 90% confidence interval, the z value is approximately 1.645.
ME = 1.645 * 0.001018 ≈ 0.001675
CI = x ± ME
CI = 4.0626 ± 0.001675
CI ≈ [4.060925, 4.064275]
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The following reaction is exothermic. 2 N2O(g) 2 N2(g) O2(g) This means the reaction: 56) A) will be spontaneous only at low temperatures B) is not spontaneous at any temperature C) will be spontaneous only at high temperature D) will be spontaneous at all temperatures E) cannot determine without temperature
Answers
For exothermic processes, spontaneity will only occur if the entropy positive with all temperature or if the entropy is negative with only low temperature.
Since the given equation decomposed from 2 moles of gas into 3 moles of gas, we know that entropy is positive. Thus the reaction will be spontaneous at all temperature.
D is the answer
Determine the volume (in mL) of 1.00 M NaOH that must be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.
Answers
Approximately 70.57 mL of 1.00 M NaOH should be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.
To determine the volume of 1.00 M NaOH required to produce a buffer with a pH of 4.50 when added to 250 mL of 0.50 M CH3CO₂H, we need to consider the Henderson-Hasselbalch equation and the stoichiometry of the reaction.
The Henderson-Hasselbalch equation for a buffer solution is given as:
pH = pKa + log([A-]/[HA])
In this case, CH3CO₂H (acetic acid) acts as the weak acid (HA) and CH3COO- (acetate ion) acts as its conjugate base (A-). We are given that the desired pH is 4.50, and we can determine the pKa value for acetic acid from reference sources, which is approximately 4.75.
Using the Henderson-Hasselbalch equation, we can rearrange it to solve for the ratio [A-]/[HA]:
[A-]/[HA] = 10^(pH - pKa)
[A-]/[HA] = 10^(4.50 - 4.75) = 10^(-0.25) = 0.5623
This means that the ratio of the acetate ion to acetic acid in the buffer solution should be approximately 0.5623.
To calculate the required volume of NaOH, we need to consider the stoichiometry of the reaction. Acetic acid reacts with hydroxide ions (OH-) to form acetate ions and water:
CH3CO₂H + OH- → CH3COO- + H2O
The stoichiometric ratio between acetic acid and hydroxide ions is 1:1. Therefore, the volume of 1.00 M NaOH needed can be calculated using the equation:
Volume (NaOH) × 1.00 M = Volume (CH3CO₂H) × 0.50 M × 0.5623
Volume (NaOH) = (Volume (CH3CO₂H) × 0.50 M × 0.5623) / 1.00 M
Volume (NaOH) = (250 mL × 0.50 M × 0.5623) / 1.00 M
Volume (NaOH) ≈ 70.57 mL
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If an ideal gas has a pressure of 5.87 atm,
a temperature of 26.86 ∘C,
and a volume of 77.31 L,
how many moles of gas are in the sample?
Answers
Answer:
5.87/26.86=77.31/...Explanation:
after solving this u can find the answer in easy way
13. Draw the structure of water. Is water considered polar or nonpolar? Explain why? Note: You can draw this on paper, take a picture, and paste the picture in your document.
Answers
H2O means water is polar because the bent shape of water molecule due to which unequal sharing of oxygen and hydrogen takes place.
Draw the structure of water. Is water considered polar or nonpolar? Explain why?
Structure of Water:
Water:
Water is polar in nature, because it can be attracted towards either the positive side or negative side of the electrical charge on a solute. The slightly negative charge present near the oxygen atom attracts the nearby hydrogen atoms from water. Unequal sharing of electrons makes the water as a polar solvent.
So we can conclude that: H2O means water is polar because the bent shape of water molecule due to which unequal sharing of oxygen and hydrogen takes place.
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Cells are the basic unit of life true or false
Answers
A brick has the mass of 555g and volume of 250cm3. what is the density of the brick
Answers
Answer:
The answer is 2.22 g/cm³Explanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\\)
From the question
mass = 555 g
volume = 250 cm³
We have
\(density = \frac{555}{250} = \frac{111}{50} \\ \)
We have the final answer as
2.22 g/cm³Hope this helps you
The following is a list of common errors encountered in research laboratories. Categorize each as a determinate or an indeterminate error, and further categorize determinate errors as instrumental, operative, or methodic:
(a) An unknown being weighed is hygroscopic.
(b) One component of a mixture being analyzed quantitatively by gas chromatography reacts with the column packing.
(c) The tip of the pipet used in the analysis is broken.
(d) In measuring the same peak heights of a chromatogram, two technicians each report different heights.
Answers
Answer:
An unknown being weighed is hygroscopic. - operative error
One component of a mixture being analyzed quantitatively by gas chromatography reacts with the column packing. - methodic error
The tip of the pipet used in the analysis is broken. - instrumental error
In measuring the same peak heights of a chromatogram, two technicians each report different heights - operative error
Explanation:
In chemical analysis, operative errors are that largely introduced into the measurement because of variation of personal judgements of analysts. It is also a personal error that emanates solely due to the analyst.
A methodic error arises as a result of adopting defective experimental methods. For example, a column packing that reacts with a component of the mixture is used in the gas chromatography.
Instrument error refers to the error of a measuring instrument, for instance, the use of a pipette with a broken tip.
Please answer !! For chemistry
Answers
Answer:
a. is the correct answer
Explanation:
Which pair of elements will form an ionic bond?
Answers
Answer: A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions
Explanation:
How are mechanical waves defined? (1 point)
Responses
They are waves that involve matter, rather than energy, moving from one place to another.
They are waves that require some form of matter as a medium.
They are waves that can pass through a vacuum.
They are waves that are generated by humans rather than naturally.
Answers
Mechanical waves are defined as they are waves that involve matter, rather than energy, moving from one place to another. Therefore, option A is correct.
What are mechanical waves ?An oscillation of matter known as a mechanical wave is what is responsible for the transmission of energy through a medium. There are two types of mechanical waves are: Longitudinal waves and Transverse waves.
The transmission medium sets a restriction on how far a wave can travel. In this instance, there is almost little translational motion and the oscillating material rotates around a fixed point.
Thus, option A is correct.
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Which of the following substances would you expect to have a low melting point?
A. carbon dioxide
B. silicon dioxide
C. lithium chloride
D. calcium bromide
Answers
Ionic compounds have higher melting point than covalent compounds.
Carbon dioxide have lower melting point (-56.6 °C) among the given compounds.
What is melting point?Melting point is the temperature at which the substance melts into liquid thus at this temperature its solid state and liquid state are in equilibrium. Melting point is depend upon the bond type and mass of the compound.
Ionic bonds are stronger than covalent bonds and hence ionic compounds have higher melting point than covalent compounds. Hence, lithium chloride and calcium bromide have higher melting point.
Silicon is bigger than carbon thus silicon dioxide melts at higher temperature. Carbon dioxide is purely covalent and melts at negative temperatures.
Hence, the compound with lower melting point here is carbon dioxide thus, option A is correct.
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Element X is in group 3. Element Y is in group 7A or 17. Which chemical
formula shows the correct formula for the synthesis reaction of X and Y?
XY
XY3
X7Y3
X3Y7
Answers
Chemical formula of element X is in group 3, element Y is in group 7A or 17 is XY₃(option-b). Since the electrovalence of X is 3 and Y is 1.
What do you mean by chemical formula?A chemical formula lists the constituent elements of a compound along with how many atoms of each are present in the compound's smallest unit, whether it be a molecule or a formula unit. We can name simple compounds based on their chemical formulas by using the names of the elements and a few simple rules.
A compound's chemical formula is a symbol that represents the compound's chemical make-up. We can determine a compound's number and type of atoms from the chemical formula by looking at the elements that make up the compound.
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Giving Brainliest if u help me with this
Answers
Answer:
A
Explanation:
Answer:
B. The western coast of the united states
Explanation:
I'm not sure if its correct but its pretty simple to understand, if you look at the arrows red represents heat, and blue represents cold, the red arrows (warm climate) is at the left more towards the U.S, therefore looking at the guide of North West South and East, it is at the western coast of the u.s
Hope this help! <3
how does the muscular sytem/muscles help with walking
pls asnwer asap
Answers
Answer:
they work with the skeletal system and joints to expand and contract, making a motion.
Explanation:
muscles in your knee pull, then release. do that again and again, and you'll be walkin
Answer:
You're able to walk because of your skeletal muscles
Explanation:
Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Hope this helps :)
1. Several solids, liquids, and gases can be found in your home. List three examples of each. (9 points) Think about where solids, liquids, and gases might be found in your refrigerator, bathroom, or basement/garage.
2. What states of matter exist within the human body? What state of matter do you think your body is mostly made up of? Why? (4 points) Think about whether the body contains solids, liquids, or gases. Which of the three would you be most likely to find?
3. Your blood contains many dissolved solids. What do you think could be done if you needed to remove the water from a sample of blood in order to study the solids that remained? (4 points) Think about what processes remove water from watery foods, solutions, or objects.
4. Your body contains a considerable amount of dissolved metal ions. Based on what you know about food and nutrition, list at least three metals you think could be found within the human body. (3 points) Refer to the periodic table — do any of the metal element names seem familiar? (Think about the ingredients list printed on food labels.)
Answers
1. Examples of solids, liquids, and gases found in a home
Solids: books, furniture, toys
Liquids: water, juice, shampoo
Gases: air, natural gas, propane
2. The human body contains solids, liquids, and gases. Solids include bones, muscles, and organs. Liquids include blood, saliva, and urine. Gases include air in the lungs and dissolved gases in the bloodstream. The body is mostly made up of liquids, as they make up a large percentage of its overall volume.
3. If you needed to remove the water from a sample of blood to study the solids that remained, you could use a process such as evaporation or freeze-drying. Evaporation involves heating the sample to allow the water to evaporate, leaving behind the solids. Freeze-drying involves freezing the sample and then removing the water under vacuum, leaving behind a dry solid.
4. Some metals that could be found within the human body include iron, zinc, and copper. These metals are commonly found in foods such as meat, seafood, nuts, and whole grains. Other metals such as calcium, magnesium, and potassium are also important for the body and are found in a variety of foods.
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