HELP NEEDED, ASAP
A sample of a gas occupies 1600 milliliters at 20.0°C and 600 torr. What volume will it occupy at the same temperature and 800 torr? (Use Boyle’s equation)
Select one:
a. 2.02 ×10^3 ml
b. 1.00 ×10^3 mL
c. 1.45 ×10^3 mL
d. 1.20 ×10^3 mL
Answer:
d. 1.20 ×10^3 mL
Explanation:
That is the answer have a wonderful day!!
Answer:
im ocean nice to meet u mariam
Explanation:
How many moles of O2 are required
if 12 moles of CuFeS are consumed?
Answer:
24 moles of oxygen are required.
Explanation:
Given data:
Number of moles of CuFeS = 12 mol
Number of moles of O₂ react = ?
Solution:
Chemical equation:
2CuFeS + 4O₂ → Cu₂S + 3SO₂ + 2FeO
now we will compare the moles of O₂ and CuFeS.
CuFeS : O₂
2 : 4
12 : 4/2×12 = 24 mol
How many moles are there in 3.04 X 10^23 molecules of hydrogen, H2, gas?
Answer:
1 mole=6.023×10^23 molecules
3.04×10^23 molecules× value of 1 mole
Explanation:
need thanks and make me brainiest if it helps you
According to the concept of Avogadro's number, there are 0.504 moles in 3.04×10²³ molecules of hydrogen.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.As 1 mole has 6.023×10²³ molecules , thus, 3.04×10²³ molecules of hydrogen will have 3.04×10²³ /6.023×10²³=0.504 moles.
Thus, there are 0.504 moles in 3.04×10²³ molecules of hydrogen.
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Fill in the blank with the correct vocabulary word: H20 (1) --> H2 (g) + O2 (g) Water is the and hydrogen gas is the
Answer:
Water is reactant and hydrogen gas is product
Explanation:
Single celled prokaryotic cells use meiosis to reproduce.
TRUE
FALSE
Answer:
True
Explanation:
Single celled prokaryotic cells use meiosis to reproduce. Its ''TRUE''
What is a Prokaryotic cell ?A prokaryote is a single-celled organism that lacks a nucleus, and other membrane-bound organelles.
Prokaryotic cells are single-celled microorganisms known to be the earliest on earth.
Prokaryotes include Bacteria and Archaea.
The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis.
A prokaryotic cell consists of a single membrane and therefore, all the reactions occur within the cytoplasm.
Prokaryotes reproduce through a cell division process called binary fission.
Like mitosis in eukaryotes, this process involves copying the chromosome and separating one cell into two.
Hence, Single celled prokaryotic cells use meiosis to reproduce is a ''TRUE'' statement.
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Read the sentence.
The same amount of matter exists before and after the change — none is created or destroyed.
How does this sentence contribute to the article's main idea?
A
It defines what is meant by the phrase "chemically the same."
B
It defines the concept of conservation of matter.
C
It explains why changing matter is important.
D
It explains that atoms have been around for a long time.
Answer:
B
It defines the concept of conservation of matter.
Explanation:
Why are some amino acids described as essential amino acids?
a.They are the ones most used in the body.
b.They can be stored in the body.
c.They are the only ones needed by the body.
d.They cannot be made by the body.
Answer:
I would say A and D if you can pick two answers. if not then pick D
Answer:
D- They Cannot be made in the body
Explanation:
Just took the test on edge
Pure water has a boiling point of 100°C and a freezing point of 0°C.
What is the boiling point and freezing point of a sample of aqueous sodium chloride?
A3
А
B
C
D
boiling point/°C
98
98
102
102
freezing point/°C
-2
2
-2
2
liquid water For example, the limited temperature range of liquid water (0°C–100°C) severely limits its use. Aqueous solutions have both a lower freezing point and a higher boiling point than pure water.
What is temperature ?How hot (or energetic) a substance or radiation is can be quantified by a physical value called temperature.
There are three different types of temperature scales: those like the SI scale that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron in a body; those that only rely on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by actual empirical properties of particulates rather than by theoretical principles.
Temperature is gauged using a thermometer. It is calibrated using a variety of temperature scales that historically defined themselves using various reference points and thermometric materials. The most widely used scale is the Celsius scale, previously called as "centigrade."
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Some lipid rafts are characterized by an accumulation of cholesterol. What does this mean for the fluidity of the lipid raft?.
The lipid rafts are less fluid than the surrounding membrane at normal temperatures.
Cholesterol decreases the fluidity of the membrane at normal temperatures.
Lipid rafts regulate neurotransmission, receptor traffickinging and influence membrane fluidity.
Lipid rafts are sphingolipid and cholesterol membrane microdomains.
Membrane fluidity refers to the viscosity of the lipid bilayer.
Cholesterol in the rafts has a potential to effectively control the ion conductance and excitability of membranes.
Human brain contains approximately 25% of cholesterol and cholesterol base substances.
Cholesterol influences the fluidity of the membrane, at low temperatures it increases fluidity and at the high temperatures it decreases fluidity.
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If the relative rate of diffusion of ozone as compared to chlorine is 6:3 and further if the density of chlorine is 36 Find out the density of ozone.
Answer:
The density of ozone is 4.24.
Explanation:
The relation between the relative rate of diffusion and density is given by :
[tex]r\propto \dfrac{1}{\sqrt d}[/tex]
The given ratio of the relative rate of diffusion of ozone as compared to chlorine is 6:3.
Let the density of ozone is d₂.
[tex]\dfrac{r_1}{r_2}=\sqrt{\dfrac{d_2}{d_1}} \\\\\dfrac{6}{3}=\sqrt{\dfrac{d_2}{36}} \\\\3=\dfrac{\sqrt{d_2}}{6}\\\\d_2=\sqrt{18} \\\\d_2=4.24[/tex]
So, the density of ozone is 4.24.
How many electrons does calcium have in its outermost shell
The proportions of substances in a mixture
O are always equal for each substance in the mixture
O can vary among the substances
O never can be determined accurately
O are always the same for each substance
2 points
You are given 52 grams of water. What volume container do you need to hold all the water? (Density of water = 1.0 g/mL)
Answer:
52 ml water is present so we need any container more than 52 ml
Explanation:
Density = mass / volume
Volume= mass/ density
52/1= 52 ml
What determines the effect of a limiting reagent on the mass of a product? A. The amount of the limiting reagent B. The reactivity of the limiting reagent C. The coefficient of the limiting reagent D. The molar mass of the limiting reagent
Answer: A. The amount of the limiting reagent
Explanation:
Alex
Answer:
A. A p E x Approved
Explanation:
Trust
PLZ help can you find a picture of the IODINE PLANITERY model please help
Answer:
yes I can find a pic of the iodine planetary model
Explanation:
U my friend OMG ^-^
Bill gates net worth
Answer:
As of 12/11/2020 Bill Gate's networth is 118.7 billion USD
Explanation:
Answer:
Bill Gates has about 124 billion dollars
there are two different compounds of sulfur and fluorine. in sf6 , the mass of fluorine per gram of sulfur is 3.55 g f/g s . in the other compound, sfx , the mass of fluorine per gram of sulfur is 1.18 g f/g s .
The value of x is 2 and the formula of compound SFₓ is SF₂.
The Law Of Multiple Proportions was given by Dalton in 1803.
According to this law, when two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.
This law is illustrated by the following example:
Hydrogen combines with oxygen to form two compounds, water, and hydrogen peroxide.
Hydrogen + Oxygen ⇒ Water
2g 16g 18g
Hydrogen + Oxygen ⇒ Hydrogen Peroxide
2g 32g 34g
Here, the masses of oxygen (i.e., 16 g and 32 g), which combine with a fixed mass of hydrogen, bear a simple ratio, i.e., 16:32 or 1: 2.
Similarly, the ratio of the mass of fluorine per gram of sulfur in the two compounds is 1.18/3.55 ≈ 1/3
As the ratio of fluorine in the two compounds is 1:3, then according to the law of multiple proportions, the number of fluorine atoms in SFₓ should be 1/3rd of the number of fluorine atoms present in SF₆ which is 6/3=2.
Thus, the formula of compound SFₓ is SF₂.
Therefore, the value of x is 2 and the formula of compound SFₓ is SF₂.
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Give the names of the ocean zones from the shore to deep ocean
Answer:
the intertidal zone, neritic zone, and oceanic zone.
Explanation:
Information from a Material Safety Data Sheet (MSDS) for hydrochloric
acid is provided below. Which section shown on the MSDS lists a physical
property of hydrochloric acid?
HCI: HYDROCHLORIC ACID
Description: Light yellow clear solution mixed with water. This acid
has a very low pH. It has a melting point of -46°C and a boiling point
of 85°C.
Hazards: Corrosive to skin and eyes. May be harmful when vapors
are inhaled, or when acid is ingested.
Reactivity: Highly reactive with metals to produce hydrogen gas.
Flammability: Not flammable
___________________________
•A. Description
* 5 points
OB. Hazards
OC. Reactivity
D. Flammability
Answer:
a give physical properties of hcl because there is no chemical reaction ph , colour , melting &boiling point are physical properties
The description section shows a physical property of hydrochloric acid on the MSDS lists. The correct answer is option A.
A physical property is a characteristic of matter that can be observed or measured without changing the substance itself. Examples include color, shape, density, and melting point.
MSDS stands for Material Safety Data Sheet. It is a document that provides information about the potential hazards of a chemical substance, as well as instructions for:
handling, storage, and disposal.Therefore, on MSDS list, description section shows a physical property of hydrochloric acid. Option A is the correct answer.
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What are the starting materials in a chemical reaction called?
How much volume in liters would 223.5 grams c6h6 has occupy?
Answer:
166.4
Explanation:
This is due to the act 1 mol of gas takes up 22.4 liters of space. so 223.5/30.5
(30.5 is molecular weight of the gas) =7.4mols x 22.4 L = 166.4
calculate the number of oxygen atoms in a 90.0g sample of vanadium(v) oxide v2o5. be sure your answer has a unit symbol if necessary, and round it to 3 significant digits
90.0 g of vanadium (V) oxygen sample has 1.50 x 10 24 oxygen atoms.
To determine the number of oxygen atoms in a vanadium oxide sample, the following steps must be made.
Step 1: Convert the mass of vanadium(V) oxide to mol of vanadium(V) oxide
mol vanadium(V) oxide = mass / molar mass
mol vanadium (V) oxide = 90.0 g / 181.88 g/mol
mol vanadium (V) oxide = 0.49483 mol
Step 2: Convert mol of vanadium (V) oxide to moles of oxygen using mole ratio
mol oxygen = mol vanadium (V) oxide * mole ratio O / mol V2O5
mol oxygen = 0.49483 mol * 5 mol O / mol V2O5
mol oxygen = 2.47416 mol O
Step 3: Convert to oxygen atoms using Avogadro's number
atoms oxygen = mol oxygen * 6.02214 x 10 23 atoms O /mol O
atoms oxygen = 2.47416 mol O * 6.02214 x 10 23 atoms O/mol O
atoms oxygen = 1.48997 x 10 24 atoms or 1.50 x 10 24 atoms O
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A car travels 300 miles in 5 hours. How long does it take for the car to travel 82 miles?
Answer:
5 hours is 300 minutes so it goes 1 mile per minute. So 82 minutes = 1 hour and 22 minutes.
Explanation:
So if the car goes 1 mile every minute to reach 82 miles you have to
1 x 82 = 82 minutes converted into hourse = 1 hour and 22 minutes :)
GUYS PLEASE HELP MEEEE!!! On a hike up a mountain Delilah sees small pieces of rock along the trail, the small pieces look like the rock that the mountain is made from. how did these small pieces of rock break off from the mountain?
1. Wind and rain interacted with the rock breaking it into small pieces
2. The small pieces of rock were formed by earthquakes, tsunamis, and other natural disasters. These disasters were strong enough to break the rock into small pieces
3. Rays from the sun shone down on the rock, and it broke into pieces
4. if anything were left out for a long time, it would break into small pieces
Answer:
2?
Explanation:
Well the rocks can be thrown around or just start breaking down. Sorry if I'm not correct
Answer:
A
Explanation:
Wind and rain interacted with the rock, breaking it into small pieces.
Expressed in scientific notation, 0.0930 m is
Answer:
m × 10n.
Explanation:
where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.
Dilution of a buffer solution with a small amount of water will ________ the ph of the solution.
The dilution of a buffer solution with a small amount of water will not bring a major change in the pH of the solution.
What is a buffer solution?A buffer solution is an aqueous medium solution that serves to buffer the pH changes, which is fundamental in biological systems to maintain the homeostasis
In conclusion, the dilution of a buffer solution with a small amount of water will not bring a major change in the pH of the solution.
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Which of the following systems has potential energy only?
A) A stone falling from a height
B) A ball rolling down an incline plane
C) A bird sitting on a branch of a tree
D) A flying bird
Answer D
Explanation:
Why Are aquifers important to our freshwater supply? 5TH GRADE ANSWER c:
Explanation:
Aquifers are porous and permeable formations that stores ground water. The ground water system is made up of mostly fresh water.
An aquifer acts as a reserve for ground water in the environment. By passing through different formations, water that recharges them are purified. This makes them fresh and mostly free from salt intrusionAn aquifer is able to store this fresh water and it is is good prospect for sourcing ground water.
What does the formula ΔH − TΔS determine?
entropy
Le Châtelier’s principle
enthalpy
Gibbs free energy
PLEASE just help me!!! Its my last question!!!!
If you add a light bulb to the circuit, the filament in the bulb will resist the flow of electrons and convert energy into_____ and ______.
Question 2 options:
light and heat
energy and matter
electrons and neutrons
electrons and protons
Answer:
Light and heat
ur welcomeeeeeeee
Answer:
Light and Heat
Give the other guy brainiest
Explanation:
Thx for the point though