The Density of this log is 1.75g/cm3. If we cut this log in half, what is the density of the log? Make sure to show your work and explain your answer.
Answers
Answer:
The density remains the same
Explanation:
The density remains the same because cutting the object in half will divide the mass & volume by the same amount. The density cant be changed no matter what happens to it.
Related Questions
tiana is a chemist who is making a chemical to add to swimming pools
Answers
Tiana is developing a chemical additive to be used in swimming pools.
What is chemical additive?Chemical additives are substances added to products to alter or improve their performance. They are used in a wide range of consumer products and industrial processes for a variety of purposes including improving shelf-life, enhancing flavor, or increasing the efficiency of a process. Common examples of chemical additives are preservatives, colorants, emulsifiers, antioxidants, stabilizers, and thickeners.
This additive is designed to help keep the pool clean and sanitary, by removing bacteria and other contaminants from the water. The additive is also designed to help balance the pH of the pool water, to ensure that it is safe for swimming and does not irritate swimmers' skin or eyes. The chemical additive must also be safe to use, and must not cause any adverse reactions in swimmers. Tiana's work involves testing different chemical compounds to find the most effective and safe additive for pool water.
To learn more about bacteria
https://brainly.com/question/30307005
#SPJ1
the maximum number of electrons that may occupy the third electron energy level is group of answer choices 2. 32. 10. 18. 8.
Answers
There can be a maximum of 18 electrons in the third major energy level.
What is meant by electrons?It is possible for an electron to be free or linked to an atom. An electron is a negatively charged subatomic particle (not bound). There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom. The nucleus of an atom is composed of protons, neutrons, and electrons.One of the three primary types of particle that make up an atom is an electron. Electrons are fundamental particles that do not contain smaller particles, in contrast to protons and neutrons, which are made up of smaller, more basic particles. They are what are known as leptons, a category of fundamental particle.Therefore,
Equation 2n specifies the maximum number of electrons that can exist in a primary energy level.
The energy level's number, n, is indicated here.
N is 3 for the third principal energy level.
2 n = 2 × 3 = 18
Both Assertion and Reason are true, and Assertion is correctly explained by Reason.
To learn more about electron, refer to:
https://brainly.com/question/25674345
#SPJ4
what is the mass of 2.50 mol of (C3H5)2S
Answers
Hey there!
We need to start this by finding the molar mass of (C₃H₅)₂S.
This molecule consists of 6 carbon atoms, 10 hydrogen atoms, and one sulfur atom. We need to add the molar masses of each atom up.
C: 6 x 12.01 = 72.06
H: 10 x 1.008 = 10.08
S: 1 x 32.07 = 32.07
-------------------------------
114.21 g/mol
Ok, now that we have established that the molar mass of (C₃H₅)₂S is 114.21 g/mol, we have 2.50 mol of (C₃H₅)₂S. If 1 mol has a mass of 114.21 g, then 2.50 mol will have a mass of 2.50 time 114.21.
2.50 x 114.21 = 285.525 grams
This should go to just three significant figures, so:
The mass of 2.50 mol of (C₃H₅)₂S is 286 grams.
Hope this helps!
Two students were doing an experiment which involved adding potassium sulfate powder to water. They added one teaspoon of potassium sulfate to the water and stirred it, and all the powder dissolved. They continued to do this until, after the fourth teaspoon, no more potassium sulfate would dissolve.
As more potassium sulfate dissolves in the water, the mixture becomes
a. more concentrated.
b. less concentrated.
c. dilute.
d. more cloudy.
Answers
Answer:
less concentrated
Explanation:
because it will get dissociated into more ions
ERGENT!!!!!!!!!!!: A runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running. [1 Calorie = 4.184 kJ] Which of the following statements is TRUE? (Select ALL that apply) *
A. There were 3,140 kJ of energy in the snack.
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
D. During her run, she used 189 Calories of energy.
E. The runner used fewer Calories while running than she consumed during her snack.
F. The runner used more Calories while running than she consumed during her snack.
Answers
Answer:
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
F. The runner used more Calories while running than she consumed during her snack.
Explanation:
According to this question, a runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running.
Since 1 Calorie = 4.184 kJ, it means that the runner consumed 375 × 4.184 = 1570 kJ of energy. In other words, THERE WERE 1,570 kJ OF ENERGY IN THE SNACK.
Also, the runner burns 3,160 kJ while running meaning that she equivalently burnt 3160/4.184 = 755.258 calories. Approximately, 755 calories of energy were burnt by the runner while running.
In a nutshell, the runner consumed 375 calories of energy in her snack but used up 755 calories while running. This means that the runner used more Calories while running than she consumed during her snack.
study the map. how might the earth's features change over time as the seismic activity along the san andreas fault continues
Answers
If the seismic activities of san Andrea's fault continues great earth quakes will occur in earth. The drift rate of earth crest will be unpredictable there.
What is San Andrea's fault ?The crust of the Earth is divided into a number of "plates" that have been gently migrating over its surface for millions of years. In western California, two of these tectonic plates collide, and the San Andreas fault separates them.
Along the fault, earthquakes occur as the Pacific Plate, which is on the west, shifts northwestward in relation to the North American Plate, which is on the east. The San Andreas is the "master" fault in a complex network of faults that rips through the rocks along the California coast.
Over the course of a hundred or more years, the portions that cause large earthquakes are locked and silent. When the strain is released, it creates massive earthquakes.
To find more on San Andrea's fault, refer here:
https://brainly.com/question/1253597
#SPJ1
Which of the following is true about scarcity?
Answers
Answer:
It would be
a) Scarcity affects all societies.
Elemental bromine reacts vigorously with elemental sodium metal to form a white solid. Does this characteristic of elemental bromine represent a physical or a chemical property?
Answers
The characteristic of elemental bromine reacting vigorously with elemental sodium metal to form a white solid represents a chemical property.
Chemical characteristics define how substances react or change chemically. A white solid forms when elemental bromine and sodium metal combine, suggesting a chemical transition.
However, a substance's physical attributes can be detected or quantified without changing its chemical composition. Colour, density, melting, and boiling points are physical qualities.
It is a chemical property of elemental bromine to react with sodium metal and generate a new compound.
Learn more about chemical property, here:
https://brainly.com/question/1728902
#SPJ4
How many grams are in 21.7 mol of H2O?
Answers
Answer:
390.6 gram
Explanation:
Mass in gram = no of moles × molar mass
Mass in gram = 21.7×18
= 390.6 gram
Answer:
390.931576 grams
in the lab, we used two solvents, one for the extraction and one for the recrystallization. what solvent did we use for the extraction, and which for the recrystallization? what solvent is trimyristin more soluble in, and why?
Answers
The solvent we use for extraction is diethyl ether and the solvent we use for the recrystallization is acetone.
Trimyristin is more soluble in diethyl ether rather than in acetone. In order to get extracted from the nutmeg, Trimyristin has to be soluble in the solvent.
Why is Trimyristin more soluble in diethyl ether?
Trimyristin was extracted in the ether rather than acetone since the molecule is predominantly nonpolar and more soluble in the latter. Trimyristin was re-crystallized in acetone since acetone is more polar than ether, which indicates that trimyristin won't dissolve as well in acetone.Trimyristin can be easily dissolved by diethyl ether, a somewhat organic material, more readily than by an aqueous solvent. It can be more easily dissolved by acetone, an organic solvent, at a much higher temperature than by diethyl ether.To learn more about extraction and recrystallization visit:
https://brainly.com/question/12910778
#SPJ4
lonic compounds can conduct electricity in
Answers
Answer:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move
Explanation:
In the synthesis of aspirin we react salicylic acid with acetic anhydride. The balanced chemical equation is:2HOOCC6H4OH + C4H6O3 → 2HOOCC6H4O2C2H3 + H2Osalicylic acid acetic acetyl salicylic acid. water anhydride If we mix together 26.3 grams of salicylic acid with 17.7 grams of acetic anhydride in this reaction, we obtain 30.7 grams of aspirin.a. What are the theoretical yields of our experiment? b. What are the percentage yields of our experiment?
Answers
(a). First, we need to identify the limiting reactant. Let's calculate the number of moles of each reactant:
For salicylic acid, we have that its molar mass is 138.1 g/mol (you can calculate it using the periodic table and doing the algebraic sum):
\(26.3\text{ g s. acid}\cdot\frac{1\text{ mol s. acid}}{138.1\text{ g s. acid}}=0.19\text{ mol s. acid.}\)And now, let's see the number of moles of 17.7 g of acetic anhydride, where its molar mass is 102.1 g/mol:
\(17.7\text{ g a. anhydride}\cdot\frac{1\text{ mol a. anhydride}}{102.1\text{ g a. anhydride}}=0.17\text{ mol a. anhydride.}\)Now, you can realize that in the reaction 2 moles of salicylic acid react with 1 mol of acetic anhydride. Let's see how many moles of acetic anhydride requires to react with 0.19 moles of salicylic acid:
\(0.19\text{ mol s. acid}\cdot\frac{1\text{ mol a. anhydride}}{\text{2 mol s. acid}}=0.095\text{ mol a. anhydride.}\)You can realize that we obtained less number of moles for acetic anhydride, meaning that the acetic anhydride is in excess and the salicylic acid is the limiting reactant, so we're going to work with this compound to find how many grams of aspirin is produced:
In the chemical equation, 2 moles of salicylic acid reacted produces 2 moles of aspirin, so the mole ratio between these two is 1:1 which is telling us that 0.19 moles of salicylic acid are producing 0.19 moles of aspirin. With this value, we can calculate the mass of aspirin as our theoretical yield. The molar mass of aspirin is 180.2 g/mol:
\(\text{0}.19\text{ mol aspirin}\cdot\frac{180.2\text{ g aspirin}}{1\text{ mol aspirin}}=34.24\text{ g aspirin.}\)Remember that the theoretical yield is the amount that we expect to get in the reaction, in this case, is 34.24 grams of aspirin.
(b). Let's see the formula for percent yield:
\(\text{percent yield=}\frac{actual\text{ amount of product}}{\text{theoretical }yield}\cdot100,\)where the actual amount of product is what we obtained from the reaction, in this case, 30.7 grams of aspirin and the theoretical yield that we've already found (34.24 g). Replacing these values, we're going to have:
\(\begin{gathered} \text{percent yield=}\frac{30.7\text{ g aspirin}}{34.24\text{ g aspirin}}\cdot100, \\ \text{percent yield=89.66}\%. \end{gathered}\)The percentage yield of the experiment is 89.66%.
10. Make your own unique problem for your classmates to solve for the
independent, dependent, and controlled variables. Make sure to include the
answers.
Answers
Answer:
Explanation:
Problem:
In a gender based experiment, the blood pressure of different ages of men is been checked and recorded to determine if there is any correlation. What will be the independent, dependent and controlled variables?
Answer:
A controlled variable is the variable that is left constant throughout the course of an experiment. The controlled variable here is the gender.
A dependent variable is the variable that is been determined or measured during the course of an experiment. The dependent variable here is the blood pressure.
An independent variable is the variable that is intentionally or decidedly altered during the course of an experiment. The independent variable here is the age.
can someone help and explain the first couple of questions i’ll figure out the rest
Answers
The given problems are related to isotopes for 1 st solution it is ¹²O isotope with 8 protons and electrons and for ³He there are 1 neutron ,2 electron and mass number is 3.
What are isotopes?Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Learn more about isotopes,here:
https://brainly.com/question/27475737
#SPJ1
helpppp plzzzzzz it's due Monday :(
A) B) C) D) E) F) G)
H) I) J) K) L) M) N)
O) P) I need to identify whether they are compounds, elements, mixtures, a mixture of compounds, a mixture of elements, or a mixture of compounds & elements
Answers
Answer: but thx for the points
Explanation:
3. Why do you think that printing a document on basic paper will help to ensure that it lasts for a very long time?
Answers
Answer:
because if the internet or electronics would go boom boom, then that would be our lifeline to save our important things.
Explanation:
Lizzie is pushing Alex on a scooter. Lizzie is pushing with 75 N of force to the left,
and Alex is helping with 20 N to the left. What is the net force on the scooter?*
Answers
Answer:
95 N
Explanation:
they are both pushing in the same direction so you simply add
75+20=95
What is the name of the group/family that nitrogen is in?
Answers
Answer:
Group 15
Explanation:
Explain how steam causes burns by describing the transfer of heat.
Answers
Answer:
It will be : (in simple terms)
Condensation of hot steam or hot vapor on the cooler skin releases the water's latent heat of vaporization, rapidly raising the temperature of the skin which will result in steam burns.
Hope it helped
All the best!!
What is one way that potential energy might be involved in rescue team missions?
Answers
Answer:
You may be saving someone from a rock slide, where the rocks will fall at any time, before they fall they have potential energy.
The one way that potential energy might be involved in rescue team missions to save someone to fall is potential energy is used to hold one.
What is gravity?Gravity is the interaction that is because of the force of energy between the surface of the earth to the mass or any energy present on the earth's surface and the force becomes double with the weight.
The potential energy is a form of energy that is used against gravity to do the work which required energy and in rescue, the energy is needed in every coss to save one.
Therefore, one way that potential energy might be involved in rescue team missions to save someone to fall is because gravitational potential energy is used to hold one.
Learn more about gravity, here:
https://brainly.com/question/13810323
#SPJ2
suppose you find a rock that contains some uranium-235 and lead-207. uranium-235 atoms decay into lead-207 atoms with a half-life of 700 million years. you determine that there are 0.125 milligrams of uranium-235 in the rock and 0.875 milligrams of lead-207. how old is the rock?
Answers
1.4 billion years 0.125 milligrams of uranium-235 in the rock and 0.875 milligrams of lead-207.
With a relative abundance of 99%, uranium-238 (238U or U-238) is the most prevalent isotope of uranium to be discovered in nature. It is non-fissile, unlike uranium-235, hence it cannot support a chain reaction in a thermal-neutron reactor. It can, however, be converted into fissile plutonium-239 since it is fertile and rapid neutron fissionable. Because inelastic scattering lowers neutron energy below the range where fast fission of one or more next-generation nuclei is likely, 238U cannot maintain a chain reaction.
Lead does not naturally decompose into lighter elements since it is not radioactive. Lead-heavy radioactive elements go through a succession of decays, going from one heavier element to a lighter or more stable one at each stage. However, the process is stopped when the element turns into lead.
To know more about radioactive click here:
https://brainly.com/question/1770619
#SPJ4
how many calcium ions can bind to one edta molecule. in other words, what is the mole ratio? group of answer choices 2 : 1 1 : 2 1 : 1 1 : 3
Answers
The mole ratio of calcium ions to EDTA molecules is 1:1.
EDTA (ethylene diamine tetraacetic acid) is a molecule composed of two nitrogen atoms, two oxygen atoms, four acetate (CH₃COO⁻) groups, and two ethylene (CH₂CH₂) groups.
It binds to cations, particularly divalent cations like calcium ions (Ca2+). Each EDTA molecule binds to one calcium ion, forming an octahedral complex.
The process of binding is a result of the EDTA molecule's geometry and the ionic nature of the calcium cation.
The four acetate groups of EDTA are arranged in a square planar structure, while the two nitrogen atoms and the two ethylene groups form a loop on the upper side of the molecule.
When the EDTA molecule is exposed to calcium ions in an aqueous solution, the calcium cation binds to the nitrogen atoms and the ethylene groups, forming a six-membered ring.
This complex is referred to as an EDTA–Ca2+ octahedral complex.
The 1:1 mole ratio of EDTA and calcium ions is important for understanding the chemistry of EDTA, as well as for applications such as buffering and sequestering.
Buffering solutions help maintain a stable pH level, and sequestering solutions are used to bind and remove metal ions from a solution. The 1:1 ratio of EDTA to calcium ions is essential for both of these applications.
The mole ratio of calcium ions to EDTA molecules is 1:1. This ratio is necessary for understanding the chemistry of EDTA, as well as for applications such as buffering and sequestering.
to know more about mole ratio refer here:
https://brainly.com/question/15288923#
#SPJ11
A 300 gram sample of pure water exerts a vapor pressure of 740 millimeters of mercury on the walls of its container. If 0.4 00 moles of glucose (C6H12O6) is added to the water, what will be the vapor pressure of the resulting solution?
723 mm Hg
738 mm Hg
739 mm Hg
743 mm Hg
Answers
The equation,P(solution) = X(solvent * P(solvent), can be used to determine vapor pressure lowering. 300 grams of water is 300g x 1 mole/18.0g = 16.67 moles water. Thus, X = 16.67 moles water/17.07 moles total = 0.977 and the new pressure = 0.977 x 740 mm Hg = 723 mm Hg.
An isotope of an element has a different number of _____.
neutrons
protons
electrons
Answers
I believe that the answer is
A) Neutrons
I hope this helps you ^-^
Answer:
neutrons
Explanation:
Jane has a collection of nickels and quarters worth $3.05. she has 7 more nickels than quarters.
write an equation involving the value of coins given in dollar, and an equation involving the number of coins.
Answers
An equation involving the value of coins given in dollar is 0.05n + 0.25q = 3.05 and an equation involving the number of coins is n = q + 7
Let's represent the number of nickels as "n" and the number of quarters as "q".
Equation 1: Value equation
The value of nickels can be expressed as 0.05n (since each nickel is worth $0.05), and the value of quarters can be expressed as 0.25q (since each quarter is worth $0.25). The total value of the coins is $3.05, so we can write the equation:
0.05n + 0.25q = 3.05
Equation 2: Number equation
It is given that Jane has 7 more nickels than quarters. Mathematically, we can express this as:
n = q + 7
These two equations represent the value of the coins in dollars and the relationship between the number of nickels and quarters.
Learn more about equation at https://brainly.com/question/17451622
#SPJ11
The part of the brain that relates to memory and judgment can be damaged by substance abuse.
A. True
B. False
Answers
Answer:
True
Explanation:
Substance abuse can cause that
Which of the following is the least precise way to measure a liquid?
A. graduated cylinder
B. pipette
C. buret
Answers
Answer:
B. pipette
Explanation:
A pipette can barely measure anything, they mostly don't have numbers on them and only squeeze out a few drops. Other materials, graduated cylinder and (buret) burette, have measuring lines on them. They can hold much more amount of liquid. This makes a pipette the least precise way to measure a liquid.
if 53 grams of magnesium oxide reacts with an excess amount of sodium chloride, how many grams of magnesium chkiride wikk ve nade
Answers
If 53 grams of magnesium oxide reacts with an excess amount of sodium chloride there would be 125.18 g magnesium chloride
The limiting reactant is magnesium oxide since NaCl is in excess, which MgO has a mass of 53.00 grams.
MgO molar mass is 40.31 g/mol.
MgCl₂'s molar mass is95.211 g/mol
The equation with a balance reaction
2NaCl + MgO → Na2O + MgCl₂
We should determine the moles of MgO
Mass MgO divided by molar mass MgO yields moles of sodium chloride.
moles of MgO = mass/ molar mass
moles of MgO = 53 grams / 40.31 g/mol
moles of MgO = 1.3148 moles
Calculate the moles of Na₂O
MgO is the limiting reactant.
To make 1 mol of Na₂O and 1 mol of MgCl₂ we need 2 moles of NaCl, we require 1 mol of MgO.
with unitary method we can calculate the moles of Na₂O
moles of MgCl₂ = 1/1 x moles of MgO
Moles of MgCl₂ = 1.3148 moles
Then calculate the mass of Na₂O
MgCl₂ molar mass is equal to its molecular weight times moles
mass MgCl₂ = 1.3148 moles* 95.211 g/mol. = 125.18 g
Learn more about mass at https://brainly.com/question/17018796
#SPJ4
which of the following statements about disulfide bond formation is false? . group of answer choices (a) disulfide bonds do not form under reducing environments grow from both ends, the growth rate is faster at the plus ends. (b) disulfide bonding occurs by the oxidation of pairs of cysteine side chains on the protein. (c) disulfide bonding stabilizes the structure of proteins. (d) disulfide bonds form spontaneously within the er because the lumen of the er is oxidizing
Answers
The false statement about disulfide bond formation is (d) disulfide bonds form spontaneously within the ER because the lumen of the ER is oxidizing. Disulfide bonds do form within the ER, but not spontaneously.
Instead, they are formed by the action of enzymes called protein disulfide isomerases (PDIs). PDIs catalyze the oxidation of cysteine residues to form disulfide bonds. Disulfide bonding (b) stabilizes the structure of proteins, and (a) disulfide bonds do not form under reducing environments. Additionally, disulfide bonds do not (c) grow from both ends, the growth rate is faster at the plus ends. Instead, they are formed between two cysteine residues on the same polypeptide chain or between different polypeptide chains.
The false statement about disulfide bond formation among the given choices is (a) disulfide bonds do not form under reducing environments grow from both ends, the growth rate is faster at the plus ends. This statement is unrelated and incorrect. In reality, disulfide bonds (b) form by oxidation of cysteine pairs, (c) stabilize protein structures, and (d) form spontaneously within the ER due to its oxidizing environment. Disulfide bonds play a vital role in maintaining the proper folding and stability of proteins, especially those secreted or located in extracellular environments.
learn more about the bond here
https://brainly.com/question/31994049
#SPJ11
4.23 x 10^23 molecules of Fe is how many liters of Fe?
Answers
Answer: 15.7 L Fe
Explanation:
\((\frac{4.23*10^{23} molecules Fe }{1} )*(\frac{22.4L Fe}{6.023*10^{23}molecules Fe } )= 15.7 L Fe\)
Basic mole conversion
The volume of 4.23 × 10²³ molecules of Fe is equal to 15.734 L.
What is Avogadro's number?Avogadro’s number can be represented as the number of entities in one mole of any substance. Generally, these entities can be molecules, electrons, protons, atoms, or ions, depending upon the chemical reaction or reactant and product.
The value of Avogadro’s number is approximately equal to 6.022× 10²³ mol⁻¹. We know that at STP the volume of any gas or substance is equal to 22.4 liters.
Given, the number of molecules of the Fe = 4.23 × 10²³
The volume of the one mole of Fe = 22.4 L
So 6.022 × 10²³ molecules of Fe have mass = 22.4 L
Then 4.23 × 10²³ Fe molecules will have the volume:
= 4.23 × 10²³ ×22.4/6.022× 10²³
= 15.734 L
Therefore, the volume of 4.23 × 10²³ molecules of Fe is 15.734 liters.
Learn more about Avogadro's number, here:
brainly.com/question/11907018
#SPJ5