Answer: This is only a guess: The "following chemical formula: " doesn't appear on my screen. But since you mentioned Mg and Cl, I would guess MgCl2
Explanation: Mr loses 2 electrons while each Cl gains one each: Two chlorines for every 1 magnesium.
A block of wood that is 3 cm on each side has a mass of 27 g. What is the density of the block? ( using sig figs )
Answer:
desity =mass /volume
27/ 3cube
1g/cm³
What is an atomic number
Answer:
the number of protons is called the atomic number
hope it helps you buddy
Answer: number of protons in an atom
Explanation:
What is the product of the unbalanced combustion reaction below?
C3H2(g) + O2(g) →
The Periodic Table
A. 04Hg(s) + C(s)
B. C(s) + H2(g) + O2(g)
C. CO2(g) + H2O(g)
D. C3H802(s)
How do I calculate the volume?
Answer:
2477.6 cm³
Explanation:
Volume = length x width x height
Label in cm³
What's the major difference between carbon and other group IV elements, excluding allotropy
Answer:
Carbon has an ability of catenation which other group IV elements lack.
Explanation:
Catenation is the ability for an element to form multiple bonds with other elements leading rise to long chains of compounds.
An example is organic compounds.
[tex].[/tex]
which picture shows the particles in a compound?
picture I and II
picture I
picture III and IV
picture II
hi <3
compound are 2(or more) elements combined together
thus your answer will be picture I
hope this helps <3
Arrange the following aqueous solutions in order of increasing boiling points.
0.050 m Mg(NO 3) 2; 0.100 m ethanol; 0.090 m NaCl
a. Mg(NO3) < NaCl < ethanol
b. ethanol < Mg(NO3)2 < NaCl
c. ethanol < NaCl < Mg(NO3)2
d. NaCl < ethanol < Mg(NO3)2
e. Mg(NO3)2 < ethanol < NaCl
Answer:
The correct choice is option b. ethanol < Mg(NO3)2 < NaCl
Explanation:
Ethanol = 0.100 m
Mg(NO3)2 = 0.15 m
NaCl = 0.18 m
The molar concentration of NaCl is the highest, which is why its boiling point will be the highest, too.
Mixture of oil and water heterogeneous?give reasons.
Answer:
because mixed particles are visible in this mixture.
Answer:
Oil and water do not mix, instead forming two distinct layer called phase. The oil phase is less dense than the water phase, and so the oil floats on top of the water.
What is the Molality of a solution prepared by dissolving 84.7 g of KMnO4 (potassium permanganate, an oxidizing agent) in 165 g of water?
a) 0.513 m
b) 11.3 m
c) 0.308 m
d) 3.25 m
e) 0.958 m
What is best illustrated by wattson and crick's ball-and-stick model of DNA
A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
Complete Question
A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
-What is the volume of the pycnometer (mL)
We have that the volume of the pycnometer in mL is
[tex]V=9.111mL[/tex]
From the Question we are told that
Pycnometer mass of [tex]m_p=27.056 g.[/tex]
Temperature [tex]T=25 \textdegree[/tex]
Pycnometer filled with distilled water [tex]m_{pf}= 36.773 g[/tex]
Apparatus weighed [tex]w=41.451 g[/tex]
Density of water [tex]\rho= 0.99704 g/mL[/tex]
Generally the equation for Density is mathematically given as
[tex]\rho=\frac{mass}{Volume}[/tex]
Since pycnometer is filled with water its volume can be defined by the volume of water in it
Therefore
Mass of water Pycnometer filled with distilled water-Pycnometer mass
[tex]M_w=36.773 -27.056\\\\M_w=9.084g[/tex]
Hence
[tex]V=\frac{9.084g}{0.99704 }[/tex]
[tex]V=9.111mL[/tex]
in conclusion
The volume of the Pycnometer in mL is
[tex]V=9.111mL[/tex]
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If a container is strong enough to hold 62.0 pounds (lb) of gasoline, how many gallons can you put in there? The density of your gasoline is 0.720 g/cm3 .
1qt = 0.94635L
1gal = 4.0000qt
1 cm3 = 1mL (exact relationship, unlimited sig dig)
1lb = 453.59g
Answer = _____ gal (Put number only)
Taking into account the definition of density and change of units, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.
First you must know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is the relationship between the weight (mass) of a substance and the volume it occupies (that same substance). Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
On the other side, 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, where a, b and c are known values and x is the value to be calculated:
a ⇒ b
c ⇒ x
So, [tex]x=\frac{cxb}{a}[/tex]
The direct rule of three is the rule applied in this case where there is a change of units. To perform conversion of units from pounds to grams, you must first know that 1 lb = 453.59 g. So, if 453.59 g is 1 lb, how many grams equals 62 lb?
[tex]mass= \frac{62 lbx453.59 g}{1 lb}[/tex]
Solving:
mass= 28122.58 grams
Then, you know:
density= 0.720 [tex]\frac{g}{cm^{3} }[/tex]mass= 28122.58 gvolume= ?Replacing in the definition of density:
[tex]0.720\frac{g}{cm^{3} }=\frac{28122.58 g}{volume}[/tex]
Solving:
volume×0.720 [tex]\frac{g}{cm^{3} }[/tex]= 28122.58 g
[tex]volume=\frac{28122.58 g}{0.720\frac{g}{cm^{3} }}[/tex]
volume= 39059.14 cm³= 39059.14 mL= 39.05914 L (being 1 cm³= 1 mL= 0.001 L)
Now, to perform conversion of units from L to qt, you must first know that 1 qt = 0.94635 L. So, if 1 qt is 0.94635 L, how many qt equals 39.05914 L?
[tex]volume= \frac{39.05914 Lx1 qt}{0.94635 L}[/tex]
Solving:
volume= 41.2735 qt
Finally, to perform conversion of units from qt to gal, you must first know that 1 gal = 4.0000 qt. So, if 1 gal is 4 qt, how many gal equals 41.2735 qt?
[tex]volume= \frac{41.2735 qtx1 gal}{4 qt}[/tex]
Solving:
volume= 10.3184 gal
In summary, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.
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brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResults? Is a scientist who is studying cancer with the
goal of finding an effective treatment doing
pure research or applied research?
A scientist who is studying cancer with the goal of finding an effective treatment is doing applied research.
Applied research refers to scientific investigations that are conducted with the specific purpose of solving practical problems or improving existing technologies. In the case of cancer research, the scientist is aiming to find a treatment that can be directly applied to patients in order to combat the disease.
In contrast, pure research, also known as basic or fundamental research, is conducted to gain a deeper understanding of a particular phenomenon without any immediate practical application in mind. Pure research aims to expand scientific knowledge and explore new theories or concepts. While pure research may indirectly contribute to the development of applied research, its primary goal is to advance our understanding of the natural world.
In summary, a scientist studying cancer with the goal of finding an effective treatment is engaged in applied research, as they are conducting research with the intention of solving a specific problem and developing practical solutions for the benefit of cancer patients.
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A student performs an experiment to determine the molar mass of magnesium oxide. The student repeats the experiment five times and collects the following data: 40.220gmol, 40.654gmol, 40.314gmol, 40.165gmol, and 40.554gmol. What is the relative standard deviation (RSD) for this set of data?
The relative standard deviation for the set of data obtained by the student is 0.470%
The formula for calculating the relative standard deviation is given below as:
Relative standard deviation (RSD) = (S * 100)/x
where S stands for the standard deviation and x is the mean of the data set.
The following are the steps to calculate to determine the relative standard deviation using the given formula:
Step 1: Calculate the mean of the numbers in the data set.
mean, x = sum of numbers / number of numbers
(40.220 + 40.654 + 40.314 + 40.165 + 40.554)/5
mean = 40.381 g/mol
Step 2: Subtract the mean from each number in the data to determine the deviation for each number and then square the deviations.
(40.220 - 40.381)² = 0.0259
(40.654 - 40.381)² = 0.0745
(40.314 - 40.381)² = 0.00449
(40.165 - 40.381)² = 0.0466
(40.554 -40.381)² = 0.0299
Step 3: Sum the squared deviations.
0.0259 + 0.0745 + 0.00449 + 0.0466 + 0.0299 = 0.181
Step 4: Determine the variance by dividing the sum of the squared deviations by the total number of values.
Variance = 0.181/5 = 0.0362
Step 6: Determine the standard deviation of the data by taking square root of the variance.
Standard deviation, S = √0.0362 = 0.190
Step 7: Determine the relative standard deviation by inserting the values in the formula, (RSD) = (S * 100)/x
RSD = (0.190 * 100)/40.381
RSD = 0.470%
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What are the variables used in an experiment? How are they different?
Answer:
There are many items that could be altered to test the reaction of another. These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.
Explanation:
A sample of solid X is carefully weighed and put inside a sealed flask. Pure hydrogen gas is added to the flask, and the mixture heated until the hydrogen starts being consumed. After hydrogen stops being consumed, the contents of the flask are removed and weighed, and from the increase in weight the value of may be calculated.
The following are the correct decisions;
1) Chemical property
2) Physical property
3) Chemical property
The question is incomplete, the complete question is;
Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column. property experiment physical or chemical? Х O physical 0 A sample of solid X is carefully weighed and put inside a vented flask. The flask is heated until oxygen gas starts being produced. After no more oxygen gas is produced, the contents of the flask are removed and weighed, and from the decrease in weight the value of O may be calculated. O chemical O (can't decide) O physical V A sample of X is melted and put into a reservoir from which a very thin tube leads down. The rate at which X flows out of the tube is measured, and from this rate the value of V may be calculated. chemical (can't decide) O physical Q A sample of solid X is carefully weighed and put inside a sealed flask. Pure hydrogen gas is added to the flask, and the mixture heated until the hydrogen starts being consumed. After hydrogen stops being consumed, the contents of the flask are removed and weighed, and from the increase in weight the value of may be calculated. O chemical O (can't decide)
A chemical property is one in which atoms of a substances are rearranged in the process. In the first case, the substance was heated and oxygen was produced. This is a decomposition reaction hence it is a chemical property that is being measured.
In the second case, the molten substance is made to flow and the flow rate is measured. The flow rate of a substance is a physical property.
In the third case, hydrogen combines with an element in the flask. This is a chemical property.
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How many atoms? H_____, O_____, Fe_____ Total atoms? _____ 3Fe(oh)2
Answer:
H = 6
O = 6
Fe = 3
Total atoms = 15
Explanation:
3Fe (OH)2
Fe = 1×3
O= 2× 3 = 6
H= 2× 3 = 6
Total atoms = 6+6+3=15
I hope I helped you^_^
how many grams are in one mole of CH3CO2H ?
Answer: 60.2g
Explanation:
One mole acetic acid weighs 60.2g
If the sum of the last
number and the middle
number of three consecutive
integersis is 71, then the
Least (smallest) number
mumber must be
Answer:
number must be 0000.999
Calculate the mass of 1 molecule of water
with step
Molecular Mass of water:-
[tex]\\ \sf\longmapsto H_2O[/tex]
[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]
[tex]\\ \sf\longmapsto 2u+16u[/tex]
[tex]\\ \sf\longmapsto 18u[/tex]
[tex]\\ \sf\longmapsto 18g[/tex]
1mole of water weighs 18g
We know
[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]
Mass of one molecule:-
[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]
[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]
A cylinder fitted with a movable piston and filled with a gas has a volume of 188.5mL at 26.7 °C when the applied pressure is 755.2 torr. The temperature of the oil bath surrounding the cylinder was increased to 165.2 °C, and the load on the piston was changed. Careful measurement now gave a value of 210.5mL for the volume. What was the final pressure in the system, in torr? Select one:
O a. 715.5 tor O b. 576.9 torr Oc. 988 6 torr O d. 1233 torr 462.6 tor
Answer:
C
Explanation:
To find the new pressure, we will use this formula: P₁V₁/T₁ = P₂V₂/T₂
P₁ = Original pressure (755.2)
V₁ = Original volume (188.5)
T₁ = Original temperature in kelvins (26.7 + 273.15 = 299.85)
P₂ = Final Volume (?)
V₂ = Final volume (210.5)
T₂ = Final temperature in kelvins (165.2 + 273.15 = 438.35)
Here is our equation
(755.2)(188.5)/(299.85) = (210.5)P₂/(438.35)
Hopefully, you have a calculator handy because this equation will end up looking like this:
474.75471 = (0.48021)P₂
Divide both sides by the coefficient
474.75471/0.48021 = (0.48021)P₂/0.48021
P₂ = 988.64
Which one of the following is NOT the unit of wave number:
m-1
cm-1
mm-1
cm
Answer:
e
Explanation:
cm is not the unit of wave number out of the following.
What is a wave number?Definition: Total number of wave cycles present in a unit distance is termed a wave number.
Wave number is always a reciprocal of the unit of distance.Wave number is denoted by the letter 'k'.The formula for wave number is 2π/λ where λ is the wavelength. Since wave number is always reciprocal, cm is not the unit for a wave number. The higher the wave number, the higher the frequency and energy.To learn more about wave number, refer to:
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In which way are the scientific method and the design process the same?
Answer: A lot of the steps are the same.
Explanation:
Scientific Method
State your question
Do background research
Formulate your hypothesis, identify variables
Design experiment, establish procedure
Test your hypothesis by doing an experiment
Analyze your results and draw conclusions
Communicate results
Steps of The Scientific Method
Engineering Design Process
Define the problem
Do background research
Specify requirements
Create alternative solutions, choose the best one and develop it
Build a prototype
Test and redesign as necessary
Communicate results
Steps of The Engineering Design Process
Which term best describes the important pieces of information that scientists gather and record during an experiment?
conclusions
data
research
supplies
Answer:
conclusions i think i am not confirmed
Answer:
b-data
Explanation:
right on the unit test review on edge
brainliest???
1. Distinguish between a mixture and a pure substance.
Answer:
1)Mixture is the combination of substance
2)There are two types of mixture such as heterogeneous mixture and homogeneous mixture
3)foreg=Salt solution ,sedimentation
Pure substance
1)Pure substances are also called elements
2)They are made up of small atoms
3)for eg= oxygen,Venadium ,Iron,Oxygen
Which of the following are considered elements:
Answer:
considered as element
Helium He
Please help me please
Explanation:
1 sugar solution =Distillation
2 Iron powder and sand=magnetic separation
3 petrol and diesel= Fractional distillation
4 Camphor and glass powder = Sublimation
name the types of polymerization and the differences
20,000 $ give a way but answer this first
Plz
12.Write the basis of naming of the following elements. 1.Neptunium,2.Mendelevium,
Answer:juhygjdkeExplanation:
Mendelevium is named for Dmitri Mendeleev who produced one of the first periodic tables.
Abelson first found neptunium in 1940 after uranium had been bombarded by neutrons from the cyclotron at Berkeley, California. ... The element was named after the planet Neptune, which is the first planet beyond Uranus.
Answer in explanation
Explanation:
neptunium was named after the discovery of the planet neptune in september 23 1846
mendelevium was named as dimitri mendeleev
Determine the molecular and empirical formulas of the following:
a. the organic solvent benzene, which has six carbon atoms and six hydrogen atoms.
b. the compound silicon tetrachloride, which has a silicon atom and four chlorine atoms and is used in the manufacture of computer chips.
c. the reactive substance diborane, which has two boron atoms and six hydrogen atoms
d. the sugar called glucose, which has six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.
Answer:
the answer is b im pretty sure
Explanation:
sorry if im wrong
The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex]. The empirical formula is also known as the simplest basic formula.
What is molecular formula ?A molecular formula is indeed a formula derived with molecules that corresponds to the total number of distinct atoms in the molecule of a chemical. A subscript inside a molecular formula denotes the number for each type of atoms in the substance's molecule.
The empirical formula provides the most basic formula for something like a compound, defined by the ratio between subscripts of the formula's smallest entire number of constituents. It is also known as the simplest basic formula. An empirical formula is the formula of a material given with the least integer subscript. The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
Therefore, the molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
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