Answer:
The answer is 19230.8 kg/m³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 500 kg
volume = 0.026 m³
We have
[tex]density = \frac{500}{0.026} \\ = 19230.769230...[/tex]
We have the final answer as
19230.8 kg/m³Hope this helps you
Rosa uses a microscope to look at a group of cells. She sees that the cells are joined together, so she knows that they are from one organism. She also sees that all of them have cell walls. Rosa could be looking at which type of cells?
Answer:
Mushroom cells
Explanation:
They are mushroom cells because they are together.
Compound X has the formula C8H12. X reacts with two molar equivalents of hydrogen in the presence of a palladium catalyst to form cyclooctane. Treatment of X with ozone followed by zinc in aqueous acid gives two molar equivalents of the same dialdehyde. What is the structure of X
Answer:
See explanation and image attached
Explanation:
If we look at the question closely, we will discover that two molar equivalents of hydrogen gas was used to obtain cyclooctane rom X. This implies that the compound X is an alkyne and it must be cyclooctyne since the hydrogen serves to reduce the triple bond and yield the corresponding alkane.
This is confirmed by the second statement which is ozonolysis of the X with zinc in aqueous acid which gave two molar equivalents of the same dialdehyde.
Image credit: Chem spider
geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 3.89·gL−1. The geochemist also measures the concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 2.1·gL−1. Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits.
Answer:
46%
Explanation:
When solving this problem we have to note that the amount of salt (in grams) before isolation and after isolation are equal. If [tex]V_1[/tex] represents its volume before isolation and [tex]V_2[/tex] its volume after isolation then:
[tex]2.1 \frac{g}{L} *V_1=3.89\frac{g}{L} *V_2\\\\\frac{V_2}{V_1} =\frac{2.1}{3.89}\\\\\frac{V_2}{V_1} =0.54\\\\This\ means\ after \ isolation\ the\ volume\ of water\ is\ 54\%\ of\ its\ original\ value.\\\\The\ amount\ of\ evaporation=1-\frac{V_2}{V_1} =1-0.54=0.46=46\%\\\\The\ amount\ of\ evaporation=46\%[/tex]
What will happen when the valve between a 2.00-L bulb, in which the gas pressure is 2.00 atm, and a 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened? Assume the temperature remains constant. (For this question, label each statement as True or False and give an explanation/justification for each of your answers to receive credit. No credit is given for only True or False answers with no adequate justification. To receive credit you must provide justification. You may have to give numerical answers followed by verbal explanations. You can use any reasoning that you see fit but be as thorough as possible.)
The two gases will mix and react.
The two gases will remain separate and will not mix.
The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 6.50 atm.
The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.50 atm.
The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.25 atm.
Answer:
- The two gases will mix and react.: FALSE.
- The two gases will remain separate and will not mix: FALSE.
- The two gases will occupy a volume of 5.0 L and the final pressure in the -two bulbs will be 6.50 atm.: FALSE.
- The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.50 atm.: TRUE.
- The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.25 atm: FALSE.
Explanation:
Hello.
In this case, given the options, since the total volume of the container includes the both of them, we find that:
- The two gases will mix and react: FALSE, since we do not know the identity of the gases which could be the same or two different inert gases.
- The two gases will remain separate and will not mix: FALSE, since as the valve is opened, the total gas will occupy the entire volume as the volume of a gas is the same to the container based on its constant molecules movements.
- The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 6.50 atm: FALSE, since in this case, by using the Boyle's law for the first compartment we obtain the pressure of the gas there:
[tex]P_2V_2=P_1V_1\\\\P_2=\frac{P_1V_1}{V_2} =\frac{2.00atm*2.00L}{5.00L} =0.8atm[/tex]
Now, we reuse it for the gas at the 3.00-L bulb to find its final pressure:
[tex]P_2V_2=P_1V_1\\\\P_2=\frac{P_1V_1}{V_2} =\frac{2.00atm*3.00L}{5.00L} =2.7atm[/tex]
So the final pressure is:
[tex]P_{TOTAL}=0.8atm+2.7atm\\\\P_{TOTAL}=3.5atm[/tex]
- The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.50 atm: TRUE considering the total pressure computed above.
- The two gases will occupy a volume of 5.0 L and the final pressure in the two bulbs will be 3.25 atm: FALSE since the final pressure is 3.5 atm.
Regards.
an unknown solution gives a yellow-green flame test
Answer:
Barium
Explanation:
When naming CoOH, which Roman numeral should be used?Immersive Reader
(A) I
(B) II
(C) III
(D) IV
PLZ HELP I'LL MARK BRAINLIEST
Answer:
coochie man? lol it's probably D or B :D
We should exhaust all possiblr resources from nature says a miner?
Answer: No
Explanation: Some scientists have declared that mineral deposits containing important non renewable resources such as copper and zinc will be exhausted in a few decades if consumption does not decrease.
Macon is 50 miles away from Atlanta. If it takes Jim one hour to drive from Macon to Atlanta on Monday but takes him an hour and a half on Tuesday, what happened to his speed?
Group of answer choices
It decreased
It increased
It averaged out to the same speed
It stayed the same because the distance stayed the same
Answer:
it decreased
Explanation:
the distance stayed the same, and if it takes him longer to get somewhere than it did another day, it would mean his speed decreased.
You are asked to devise a procedure for quality control in a fertilizer plant to check that the nitrogen and phosphorus content is within a specified range. You decide on the outlined steps to monitor a production run of 1000 bags of fertilizer. A. A 50 g sample is removed from every 100th bag of fertilizer produced, resulting in ten 50 g samples. B. Samples 1, 3, 5, 7, and 9 are thoroughly mixed and a 50 g sample of the mixture is removed. C. Samples 2, 4, 6, 8 and 10 and the 50 g sample from the mixture are taken to the analytical laboratory. D. Each 50 g sample is separately dissolved in a fixed volume of water and the solution is filtered to determine the quantity of insoluble material. E. Separate aliquots of the water solutions are subjected to the procedures of phosphorus and nitrogen analysis.
Answer:
Options : A, B and C are correct procedure for quality control in a fertilizer plant
Explanation:
The options that constitute the sampling plan are :
A) A 50 g sample is removed from every 100th bag of fertilizer produced, resulting in ten 50 g samples
B) Samples 1, 3, 5, 7, and 9 are thoroughly mixed and a 50 g sample of the mixture is removed
C) Samples2,4,6,8 and 10 and the 50 g sample from the mixture are taken to the analytical laboratory.
A quality control procedure is used to ensure that a certain product is produced following set standards or meets the required quality desired by the customer . and options A, B and C ensures that.
It is one of the factors affecting metamorphic rock which creates lineation.
Answer:
Pressures and temperatures
Explanation:
In deciding the new substances that develop in a metamorphic stone, pressures and temperatures are major factors. Under various conditions of pressure and temperature, various minerals form.
Metamorphic rocks are classified that, extreme heat and strain, have altered shape. Metamorphic derives from the terms meta and morph in german. Meta means alteration and morph means shape. So, to alter shape, we get metamorphosed significance.
In a hot shower or steam room, you look up at the ceiling. What do you observe on the ceiling and why?
The early periodic table grouped elements based on similar properties. Which element would be grouped with sodium using this principle.
A. Magnesium
B. Zinc
C.Potassium
D. Sulfur
Answer:
C.Potassium
Explanation:
As we know that Potassium is a mineral also at the same time it is an electrolyte. It helps for muscles work involves the muscles so that the heartbeat and breathing could be controlled.
Now as per the periodic table on an early basis that depends upon the similar properties so the element that should be grouped with the sodium is Potassium
hence, the option c is correct
According to the early periodic table the element that has been grouped together with Na has been Potassium. Thus, option C is correct.
The early periodic table has been consisted of the elements that has been arranged based on the increasing order of the atomic mass. The grouping of the elements has been performed based on the similarities with the elements.
The sodium has been the electrolyte that has been responsible for maintaining the electrolyte balance in the human body. The sodium has been the smaller size element with being highly reactive.
The element that has also been small size with high reactive, and has been able to maintain the body electrolyte balance has been Potassium.
Thus, according to the early periodic table the element that has been grouped together with Na has been Potassium. Thus, option C is correct.
For more information about the early periodic table, refer to the link:
https://brainly.com/question/9915445
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen iodide
A balanced chemical equation for the standard formation reaction of gaseous hydrogen iodide is H₂(g) + I₂(g) → 2HI(g).
What is balanced reaction?Balanced chemical reactions are those in which equal amount of each entities will present on both sides of the reaction.
Formation of gaseous hydrogen iodide takes place by the mixing od hydrogen gas and iodine gas and balanced chemical equation for the formation of HI will be represented as:
H₂(g) + I₂(g) → 2HI(g)
So, required equation is H₂(g) + I₂(g) → 2HI(g).
To know more about balanced equations, visit the below link:
https://brainly.com/question/26694427
hydrogen peroxide slowly decomposes into water and oxygen.the enthalpy change of reaction can be calculated using standard enthalpies of formation.Using a Hess cycle what is the enthalpy change of reaction for this decomposition
Using Beer's Law determine the concentration of a dye dissolved in water that has an absorptivity of 1 x 102 cm-1M-1 and produces an absorbance reading 1.0. The length of the cuvette is 1 cm.
Answer:
1 × 10⁻² M
Explanation:
Step 1: Given data
Absorptivity of a dye (ε): 1 × 10² cm⁻¹M⁻¹
Absorbance (A): 1.0
Length of the cuvette (l): 1 cm
Concentration of a dye (C): ?
Step 2: Calculate the concentration of the dye
We will use Beer's Law.
A = ε × l × C
C = A / ε × l
C = 1.0 / 1 × 10² cm⁻¹M⁻¹ × 1 cm
C = 1 × 10⁻² M
The concentration of the dye is 1 × 10⁻² M.
How many grams of mgcl2 must be provided 1.89 mole of chloride ions
Answer:
Mass = 89.97 g
Explanation:
Given data:
Number of moles of chloride ions = 1.98 mol
Mass in grams of MgCl₂ present = ?
Solution:
we can see that 1 mole of MgCl₂ contain 2 moles of chloride ions. Thus 1.89 moles of chloride ions contain moles of MgCl₂ are,
Cl₂ : MgCl₂
2 : 1
1.89 : 1/2×1.89 = 0.945
Thus, 1.89 moles of chloride ions are provided by 0.945 moles of MgCl₂.
Mass of MgCl₂:
Mass = number of moles × molar mass
Mass = 0.945 mol × 95.211 g/mol
Mass = 89.97 g
Consider the reaction and indicate which reactant is the Lewis acid and which is the Lewis base. C H 3 C O Cl and F e C L 3 give F e C L 4 minus and C H 3 C O plus. The structure of C H 3 C O C L is a central carbon double bonded to an oxygen containing two lone pairs. The central carbon is also bonded to a methyl group and a chlorine, which contains three lone pairs. The product is a central carbon with a plus charge, which is double bonded to an oxygen which contains two lone pairs. THe carbocation is also bonded to a methyl group. Identify the true statement(s).
Answer:
[tex]\mathbf{FeCl_3}[/tex] is the lewis acid
[tex]\mathbf{CH_3COCl}[/tex] is the lewis base
Explanation:
The Lewis acid is a compound capable of accepting a doublet of electrons and which has an electronic gap on its valence layer.
The lewis base is a compound capable of donating a doublet of electrons.
A Lewis acid associates with a Lewis base through a covalent bond (sharing of two electrons between two atoms). The reaction between an acid and a Lewis base produces a compound called the Lewis adduct.
We can see the illustration of the diagrammatic expression in the image attached below.
(b) in the direct hydration method, ethene reacts with steam. The equation for this reaction is C2H4 + H2O = C2H5OH
State the temperature and pressure used in this reaction.
Answer:
20 degree and 4000000N
HELP NOW PLEASE
A substance is matter that is ____ and has a ____ composition?
Which example describes a use for gemstones?
fabrics
plastics
drill bits
paper clips
I will give Brainlyest
Answer:
drill bits
Explanation:
I don't think that you would use gemstones in anything else.
In the warm up, you reviewed the equation to calculate
kinetic energy. What question could you ask about kinetic
energy which will include the variables that affect it?
Answer:
Can be used to do work,and it can be converted to potential.
Explanation:
Answer: can it be used to do work
Explanation:
Can someone suggest some really good scientific topic for my scientific presentation?
liqued in which a substance dissolve
Answer: Water as its the universal solvent
Pepsi
Vinegar
Orange Juice
What property do all three of these common household substances have in common?
A)
They are all acidic.
B)
They all taste bitter.
C)
They all have a pH above 7.
D)
They all turn litmus paper blue.
Answer:
A) They are all acidic.
Explanation:
All 3 of those have acidic qualities in the drink.
Answer:
They are all acidic
Explanat
Some dog foods contains corn and wheat that provide the dog with carbohydrates. Which claim explains why carbohydrates are important to cell processes?
A) They are a source of energy.
B) They make amino acids.
C) They form cell membranes.
D) They help chemical processes happen.
(Science 7th grade)
Hello!
The answer is that they are a source of energy!
Hope this helps!
what is extraction .....???
Answer:
Extraction is the action of removing something.
Explanation:
What do you notice about the relationship between the force strength and the size of the velocity change?
Answer:
fkv SFHHHHHHHHHCB FSSSSZCHJjjjb .SFFHHHHHHHHC
Explanation:
What do you notice about the relationship between the force strength and the size of the velocity change?
Uuuuuuu
HELP HELP PLEASE ILL GIVE BRAINLEST
compare the circulatory system of a frog and the circulatory system found in humans
Answer:
Frogs have three circuits for their circulation, unlike humans who only have two. Like humans, however, frogs have a systemic circuit, which pumps oxygenated blood throughout the body. The pulmonary circuit moves blood to the lungs to pick up oxygen.
Explanation:
Answer:
A
Explanation:
How many days are in 5.75 weeks?
Answer:
There are 40.25 days in 5.75 weeks
Answer: 40.25
Hope this helped! :)
Four different methods are described for validating the results of a particular analysis. Indicate for each whether the method primarily checks the accuracy of the analysis or the precision of the analysis. Method 1: Five aliquots of the same sample are injected for a gas-chromatographic analysis by one person on the same day. a. precision.b. accuracy.Method 2: A known amount of analyte is added to an aliquot of the sample and analyzed with the sample. a. precision.b. accuracy. Method 3: Aliquots from a blood sample are sent to three separate laboratories for analysis using the same method. a. precision.b. accuracy. Method 4: Identical standards are analyzed by two different methods. a. accuracy.b. precision.
Answer:
Method 1 - precision
Method 2 - accuracy
Method 3 - precision
Method 4 - accuracy
Explanation:
The accuracy of a method refers to how close the experimental result is to the accepted value. Accuracy could be checked by carrying out the required test on the standard and not on the sample or by adding a known amount of analyte to the sample so that the results obtained can be carefully compared.
Precision on the other hand, refers to how close the results of a replicate analysis are to each other. In testing for precision, the analysis must be carried out several times, in order to check how close the results are to each other.