1.70 g/mL is the density of a substance with a mass of 45. 00 g and a volume of 26. 4 ml.
What is density ?Mass per unit of volume is referred to as density. Although the Latin letter D can also be used, the symbol for density is most frequently written as (the lower case Greek letter rho). Mass divided by volume is the mathematical definition of density: where is the density, m is the mass, and V is the volume. Density is sometimes loosely defined as a substance's weight per unit volume, while this is incorrect scientifically; the term "specific weight" is more appropriate. An example of this is in the oil and gas business in the United States.
The density and mass concentration of a pure substance are numerically equivalent. Density can affect buoyancy, purity, and packing. Varied materials typically have different densities.
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How is nitrogen gas separated from air?
If you have 44. 8 l of nitrogen gas at standard temperature and pressure, how much will it weigh? report your answer in grams to the nearest whole number.
at standard temperature and pressure.
1 mole of nitrogen gas weighs 22.4*1000 g at STP
2 moles weigh 44.8*10³g at STP.
What is standard temperature and pressure?
Standard sets of settings for experimental measurements are produced at standard temperatures and pressures (STP), allowing comparisons to be made between various sets of data. The most popular standards, though not universally acknowledged, are those of the National Institute of Standards and Technology (NIST) and the International Union of Pure and Applied Chemistry (IUPAC). For their common reference conditions, other organisations have developed a number of different alternative definitions.
Any ideal gas at STP that is standard temperature and pressure, occupies 22,4 l volume
Thus, the no of mole of nitrogen gas occupying 44.8l volume = 44.8/22.4 = 2 moles.
1 mole of nitrogen gas weighs 22.4*1000 g at STP
Thus, 2 moles weigh 44.8*10³g at STP.
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You're sitting on neptune, it's pretty spooky. you find a substance, but don't know what it is. you scoop the substance into a bowl. the substance takes the shape of the bowl and has an indefinite volume. it's most likely a _________.
Answer:
I would say it's an alien
Explanation:
just a guess :)
What is the activation energy for the reverse reaction? express your answer as an integer.
The difference in energy between the product(s) (right) and the transition state is all that the reverse reaction's activation energy is (hill).
What is activation energy?The least amount of energy needed for a reaction to take place is called the activation energy. This indicates that the reactant molecules have sufficient kinetic energy to successfully collide and get rid of the outer electron repulsion.
A spark is required to ignite a fuel's burning reaction. A fuel must be burned with at least a certain amount of energy. The activation energy is the bare minimum of energy required for a reaction to occur.
When a chemical reaction is to begin, the reactants must be properly arranged and their existing bonds must be broken. This is the function of activation energy.
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100 POINTS AND BRAINLIEST
If a glass contains 0.465 L of water, what is the volume of water in mL?
On a professional basketball court, the distance from the 3-point line to the basket
724.0 cm. What is this distance in meters?
How many kilograms are in 8.465 slugs?
If an object occupies a volume of 6.1236 liters, how many gallons does it occupy?
A balloon is blown up so that its volume is 1,500 mL. What is its volume in KL?
Answer:
1. 0.465L × 1000 = 465 ml
2. 7.240 m
3. 123.537 kg
4. 1.62 gal
5. 0.0015 KL
Explanation:
please make my answer as brainelist
How big was the universe after 100 seconds
Answer:
The Universe was once just the radius of the Earth-to-the-Sun, which happened when the Universe was about a trillionth (10-12) of a second old. .
Explanation:
Answer: like 25 0's i think
Explanation:
Which pair of words best completes the following sentence? colliding nuclei must be at a sufficient _______ and have sufficient _______ to allow effective collisions that lead to fusion.
colliding nuclei must be at a sufficient density and have sufficient energy to allow effective collisions that lead to fusion.
What is fusion?
When atoms are in close proximity to one another, the nuclear force draws their nuclei together to form a single, bigger nucleus. This process is known as fusion. The positive charge of the nuclei, which repels one another due to the electrostatic force, opposes this action. The nuclei must possess sufficient energy to break through this coulomb barrier for fusion to take place.
The molecules that collide must have the following properties to produce effective collisions: Energy that is more than the threshold energy or a specified minimum amount of energy, and suitable geometry. A correct orientation and D threshold energy Medium
Thus, colliding nuclei must be at a sufficient density and have sufficient energy to allow effective collisions that lead to fusion.
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Calculate the ph of a blood plasma sample with a total co2 concentration of 25.6 mm and bicarbonate concentration of 24.4 mm. the relevant pa of carbonic acid is 6.1.
The pH of the blood plasma sample is 6.1.
The solution of carbonic acid and bicarbonate is a buffer solution. In buffer solution is a mixture of a weak base or acid and its conjugate salt. Resisting change in pH is one of the properties of a buffer system.
The concentration of carbon dioxide = 25.6 mM
The concentration of bicarbonate concentration =
24.4 mM
Pa of the carbonic acid = 6.1
The pH of the blood plasma sample with a total carbon dioxide of 25.6 mM and a bicarbonate concentration of 24.4 mM.
[tex]pH = pK _{a} + log \frac{[ HCO]}{[ H _{2}CO _{3} ]}[/tex]
[tex]pH = 6.1 + log \frac{[24.4]}{[25.6 ]}[/tex]
pH = 6.1 + log (0.953)
pH = 6.1 - 0.209
pH = 6.1
The pH of the blood plasma sample with a total carbon dioxide of 25.6 mM and bicarbonate concentration of 24.4 mM is 6.1.
Therefore, the pH is 6.1.
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Which one of the following compounds is most likely to be ionic? select one:
a. hnf2
b. h2co
c. n2h4
d. cacl2
e. icl
CaCl2 is the compound which is more likely to be ionic .
Ionic compounds: what makes them?Ions, charged particles that develop when an atom (or group of atoms) gets or loses electrons, are the building blocks of ionic compounds. An anion is a negatively charged ion, whereas cations are positively charged ions. When two elements create molecules by a covalent link and share electrons, this results in covalent or molecular compounds.
When Cacl2 dissolve in aqueous solution it gives Ca+² and cl- ions.
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Cobalt phosphate has a bright violet color and was once used as a paint pigment. Cobalt phosphate has the following chemical formula:
Co3(PO4)2
How many cobalt (Co) atoms are found in one molecule of cobalt phosphate? Answers:
3
5
2
6
Answer:
3
Explanation:
its 3 because i had the assigment before
How many monochlorination products can be formed (constitutional isomers only) from the reaction of ch3ch2ch2ch2ch2ch3 with cl2 in the presence of light?
3 monochlorination products can be formed (constitutional isomers only) from the reaction of CH3CH2CH2CH2CH2CH3 with Cl2 and hν.
What is the end result of monochlorination?Isomeric products are formed when alkanes larger than ethane are halogenated. Thus, when propane is chlorinated, both 1-chloropropane and 2-chloropropane are produced as mono-chlorinated products.All isomeric alkanes with the formula C5H10 can yield a total of fourteen monochlorinated products (excluding stereoisomers).2,2-dimethylpropane. Chlorination is one of the reactions that alkanes undergo, in which a hydrogen atom in the alkane is substituted with a chlorine atom when the alkane is reacted with chlorine in the presence of light. We discussed a relatively simple reaction last time: free-radical chlorination of methane to (CH4) to give chloromethane (CH3Cl), and how the reaction proceeds through three stages: initiation (where free radicals are formed), propagation (the main "product-forming" step of the chain reaction, where a chloroalkane is formed without net formation of new free radicals), and termination (where radicals combine, resulting in a net reduction of the number of free radicals).To learn more about monochlorination refer to
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Which type of variable is kept the same throughout an experiment?
ILL GIVE BRAINLYIST
Answer:
A control variable
Explanation:
Answer:
Control variable
Explanation:
Which has more potential energy melted or solid
2
In Lei's experiment, one step of the procedure requires her to bring some water to a boil. Which two pieces of equipment should Lei
use to carry out this step?
OA. a magnet and a petri dish
OB. a hot plate and a beaker
OC. a Bunsen burner and a balance
OD. a magnifying glass and a test tube
Reset
Submit
In Lei's experiment, one step of the procedure requires her to bring some water to a boil. Lei should use OC.a Bunsen burner and a balance.
Because it can operate with a variety of gases, has a single flame, and allows for adjustable heat output, the Bunsen burner is crucial in laboratories. Scientists utilize a variety of beakers in the lab. Scientists mix and track the responses of various compounds within them.
The following are three general safety guidelines when using a Bunsen burner: Never leave the lab with the burner on and never leave open flames unattended. Once the gas has been used up, turn it off. Before handling the burner, allow it to cool. Before leaving the lab, make sure the main gas valve is closed.
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An element has 32 protons, 40 neutrons, and 36 electrons. What is the name of the element?
Germanium (Ge) with a charge of -4
Two objects labeled A and B are the same size object A has a density of 1.21g/cm square root 3 object B has a density of 1.37g/cm square root 3 if both are placed in a beaker of water which will float higher in the water
The object that will float higher in the water is the object whose density is 1.21g/cm^3.
What is density?The term density is the ratio of the mass to the volume of an object. We know that density is an intrinsic property hence it does not depend on the amount of substance that is present therefore, we could use the density of a substance to identify the substance.
The greater the density of an object, the more the object sinks into the water much farther. We now need to compare the two objects. The object that has the higher density would tend to sink deeper into water.
Thus the object that will float higher in the water is the object whose density is 1.21g/cm^3.
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A lype of organism that gets its energy directly from the
Sun and is unable to move from place to place on its own?
AUTOTROPS is a type of organism that gets its energy directly from the Sun and is unable to move from place to place on its own.
Autotrophs are organisms that derive their energy from chemical interactions or the sun. They are also known as producers since they create organic molecules from simple inorganic substances and energy.
How do autotrophs sustain their own existence?Photosynthesis is the method that most autotrophs employ to produce their food. During photosynthesis, autotrophs use the sun's energy to transform soil-derived water and atmospheric carbon dioxide into glucose, a nutrition. A kind of sugar is glucose. Plants get their energy from glucose.
What distinguishes autotrophs from heterotrophs in the most fundamental way?Heterotrophs must rely on the energy of other species while autotrophs can produce energy from the sun.
Producers who prepare their own food are known as autotrophs. Consumers that are heterotrophs rely on other sources for their nourishment.
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Which method is most appropriate for separating large solids from a liquid? (1 point)
O chromatography
O filtration
Odistillation
O evaporation
Answer:
Filtration would be the easiest as liquid will pass through filter leaving solid.
Valerie and Greg want to bake a cake. They mix the cake batter and preheat the oven. Once the oven reaches the right temperature, they pour the batter in a cake pan, put it in the oven, and close the door. They know that while the cake is in the oven, a chemical change that involves energy occurs. Which of these statements describes the amount of energy in the oven while the cake is baking?
A. The total amount of energy will either increase or decrease, depending on how much cake batter there is.
B. The total amount of energy increases because the oven gets very hot.
C. The total amount of energy decreases because it changes into matter.
D. The total amount of energy stays the same, but it changes from one form to another.
Answer: D
Explanation: Energy cannot be created or destroyed
In this model of a reaction, how do you interpret the orange balls being positioned in the middle of a line drawn between two atoms?
The orange balls being positioned in the middle of a line drawn between two atoms interpret a nonpolar bond exists between the two atoms.
In nonpolar bonds the arrangement of electrons are in the middle between two atoms (see the picture below).
The orange balls represent the electrons.
For example, nitrogen molecule (N₂) has strong nonpolar triple covalent bond (:N:::N:), that is why it is very stable and have low reactivity.
In molecule of nitrogen (N₂), bond order is 3 , because there are three pair of electrons (6 electrons) between nitrogen atoms.
Other example, molecule of oxygen has nonpolar bonds.
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3) The distance from the Earth to the Moon is 238,900 mi. What is the distance in inches?
The distance from the Earth to the Moon in inches is 18304704000 inches.
What is the distance from the Earth to the Moon?Distance is a measure of the point of separation of two point or the amount of space between two points.
The SI unit for measuring distance is meters with symbol m.
Other common units of measuring distance or length include:
miles with distance miinches with symbol infeet with symbol ftThe distance from the Earth to the Moon is given in miles as 238,900 mi
1 mile = 63360 inches
238900 miles = 238900 * 63360
238900 miles = 18304704000 inches.
Distance = 18304704000 inches.
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A 0.612 g sample of a compound containing carbon, hydrogen and oxygen was burned. the reaction produced 0.897 g of carbon dioxide and 0.365 g of water. what is the empirical formula of the compound?
The empirical formula of the compound CH₂O.
m(CO₂) = 0.897 g; mass of carbon dioxide
n(CO₂) = 0.897 g ÷ 44 g/mol
n(CO₂) = n(C) = 0.0203 mol; amount of carbon in the compound
m(C) = 0.0203 mol × 12 g/mol
m(C) = 0.243 g; mass of carbon in the compound
m(H₂O) = 0.365 g; mass of water
n(H₂O) = 0.365 g ÷ 18 g/mol
n(H₂O) = 0.0203 mol; amount of water
n(H) = 2 × n(H₂O) = 0.0406 mol; amount of hydrogen in the compound
m(H) = 0.0406 g; mass of hydrogen in the compound
m(O) = m(compound) - m(C) - m(H)
m(O) = 0.328 g; mass of oxygen in the compound
n(O) = 0.328 g ÷ 16 g/mol
n(O) = 0.0203 mol; amount of oxygen in the compound
n(C) : n(H) : n(O) = 1 : 2 : 1
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Which will be attracted to a negatively charged region of a protein?
a. the o atom in the water molecule
b. a phosphate group
c. the h atom in a c-h bond
d. cl-
e. the h atom in the water molecule
The H atom in the water molecule will be attracted to a negatively charged region of a protein. So, the correct option is (e).
The protons at the center of the quantum atom are a significant source of positive charges and are attracted to all negatively charged electrons.Therefore, in a covalent connection, shared electrons are drawn in the direction of the positively charged protons at the centres of the two atoms.
The number of protons in the centre of each atom, the electrons' energy level and orbital, and the quantity or number of electrons between them and the atomic centre (the amount of "screening" by inner electrons) all affect how strongly the electrons are dragged.
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Speed (S) or Velocity (V)
A person walks 3.5
mph.
| |
A bird flies 20 m/s.
A bike goes 30 m/s to-
ward town.
A person walks 3.5 mph is speed. A bird flies 20 m/ s speed. A bird goes 30 m/s toward town is velocity.
Speed is define as the rate at which an object is moving along a path.speed is a scalar quantity.the average speed of object will continue same if the objects changes its direction. speed never be zero.
Velocity is define as the rate at which an object changes in certain direction.velocity is a vector quantity.velocity changes with time. velocity can be zero , negative or positive.
In the given case,
A person walks 3.5 mph .
this only ha magnitude, so, this is speed (s).
A bird flies 20 m/s .
this only has magnitude, so, this is speed.(s)
A bike goes 30 m/s toward town.
this has magnitude as well as direction.so, this is velocity (v)
Thus,A person walks 3.5 mph is speed. A bird flies 20 m/ s speed. A bird goes 30 m/s toward town is velocity.
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How much water would you add to 10 ml of a 1.0 m salt solution to change its concentration to 0.001 m?
1000 times dilution of 1.0M salt solution needs to be done to obtain a solution with 0.001M concentration.
Dilution is the method of reducing a solute's concentration in a solution. It generally only involves mixing the solution with extra solvent, such as water.
Serial dilution is the best option to obtain 0.001M concentration from a stock solution of 1.0M salt solution.
1ml 1.0M solution + 9ml water = 0.1M concentration (10 times dilution)
1ml 0.1M solution + 9ml water = 0.01M concentration (100 times dilution)
1ml 0.01M solution + 9ml water = 0.001M concentration (1000 times dilution)
This method of dilution also saves water, time and energy.
OR
To 10ml of 1.0M salt solution, 990ml of water should be added to obtain a solution of 0.001M concentration.
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Which molecule would you expect to be least reactive in nucleophilic acyl substitution?
Carboxylate groups are the least reactive towards nucleophilic acyl substitution among carboxylic acid derivatives, followed by amides, (protonated) carboxylic acids, thioesters, esters and finally acyl phosphates, that are most reactive among biologically relevant acyl groups.
Before delving into the details of nucleophilic acyl substitutions, it is critical to understand the relative reactivity of carboxylic acid derivatives. In general, the carbonyl carbon in an acyl group is less electrophilic than the carbonyl carbon in an aldehyde or ketone. This is because the partial positive charge on the carbon in carboxylic acid derivatives is somewhat stabilized by resonance effects from the adjacent heteroatom.
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Give the iupac name for each of the following compounds:
(a) ch3(ch2)25ch3
(b) (ch3)2chch2(ch2)14ch3
(c) (ch3ch2)3cch(ch2ch3)2
IUPAC name
(a) ch3(ch2)25ch3 : Octacosano
(b) (ch3)2chch2(ch2)14ch3 : 1,1-dimethyl-heptadecano
(c) (ch3ch2)3cch(ch2ch3)2 : 1,1,1,2,2-pentaethylethane
What is IUPAC name?
Compound naming requires adherence to a set of rules. For identifying organic compounds, the nomenclature (name system) of the IUPAC (International Union of Pure and Applied Chemistry) is used. The names will be uniform as a result.
Prefixes are used in the IUPAC nomenclature before the root. Because they show if an organic molecule has side chains or substituent groups, prefixes are highly useful. These prefixes also indicate the cyclic or acyclic nature of the substances at issue.
Thus, IUPAC names of the following compounds are :
(a) ch3(ch2)25ch3 : Octacosano
(b) (ch3)2chch2(ch2)14ch3 : 1,1-dimethyl-heptadecano
(c) (ch3ch2)3cch(ch2ch3)2 : 1,1,1,2,2-pentaethylethane
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Calculate the mass percentage of kcl in a solution containing 15.50 g of kcl in 200.0 g of water.
Answer: 7.19%
Explanation:
15.5g + 200g = 215.5 g
(15.5g/215.5g) =0.0719
0.0719*100% = 7.19%
Earthquakes generate shock waves that travel through earth's interior to other parts of the world. The fastest of these waves are longitudinal waves, like sound waves and are called primary or, just p waves. A pwave has a very low frequency typically around 0.050Hz. If the speed of a pwave with this frequency is 8.0km/s what is its wavelength
Answer:
16 HzExplanation:
wavelength = v/ f where v=speed (0.8km/s)
f=frequency (0.050Hz)
= 8.0/ 0.050
= 16Hz
Hope this helpsAce that homework
Good luck ✅Look at attached picture and please help me fill in equation and work and answer amd units
The specific heat capacity of the unknown metal is 1.07 J/gºC
How to determine the specific heat capacityFrom the question given above, the following data were obtained:
Mass (M) = 124.5 gramsChange in temperature (ΔT) = 56.76 °CHeat (Q) = 7560 JSpecific heat capacity (C) = ?The specific heat capacity of the unknown metal can be obtained as illustrated below:
Q = MCΔT
7560 = 124.5 × C × 56.76
7560 = 7066.62 × C
Divide both sides by 7066.62
C = 7560 / 7066.62
C = 1.07 J/gºC
Thus, the specific heat capacity of the unknown metal is 1.07 J/gºC
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