Answer:300k=3L
700k=x
cross multiply
300x=2100; x=7L
Explanation:
Answer:
7L
Explanation:
Which organism is a producer? A) Oak tree B) Mushroom C) Mountain Lion D) Butterfly
Answer:
A
Explanation:
Oak trees are producers because they make their own food through the process of photosynthesis.
Answer:
A. oak tree
Explanation:
A producer is an organism that produces or creates its own food through the process of photosynthesis. Certain organisms, like plants, algae and some bacteria undergo this process. Carbon dioxide, water, and light energy from the sun are turned into glucose and oxygen. The glucose becomes the food for the organism.
A mountain lion and a butterfly are both animals. A mushroom is a fungus. Therefore, the correct answer must be A. oak tree.
given that the electronic configuration of an element X is 1s2 2s2 2p6 3s2 3p4,it can be deduced that X:
a. belongs to group VI in the periodic table
b. belongs to period 4 in the periodic table
c. contains 3 unpaired electrons in the ground state
d. has atomic number 27
Answer:
Option A
Explanation:
The element X belongs to
=> Period 3 (Because it's valence shell is 3)
=> Group VI (Because electrons in the valence shell , 2+4 = 6)
The element X can be deduced to:
a. belongs to group VI in the periodic table
Periodic table:It is the arrangement of elements in the order of increasing atomic number.
Given Electronic configuration of element X:[tex]1s^2 2s^2 2p^6 3s^2 3p^4[/tex].This element has an atomic number 16. The element having atomic number 16 is Sulphur. It belongs to: Period 3 (Because it's valence shell is 3)Group VI (Because electrons in the valence shell , 2+4 = 6)Thus, Element X belongs to group VI.
Therefore, correct option is a.
Find more information about Periodic table here: brainly.com/question/15987580
differentiate between short period and long period
The question is incomplete. The complete question is as follows:
Differentiate between a short period and long period production functions.
Answer:
Difference between a short period and long period production functions is as follows:
Short period: During this period at least one of the factors of production is available in a fixed quantity. For example: Framers having fixed land for growing crops.
Long period: During this period all the factors of production are variable. So change in any variable can increase the production.
The pressure of a 1-L nitrogen gas sample at 25 ⁰C is 0.30 atm. The pressure of a 1-L oxygen gas sample at the same temperature is 0.25 atm. The oxygen gas sample is added to the nitrogen container. Argon gas is added to the mixture until the total pressure of the 1-L container reaches 1.00 atm, and the temperature is adjusted to 25 ⁰C. According to Dalton’s Law of Partial Pressures, the contribution of each gas to the total pressure of the gas mixture is: Nitrogen _____________ Oxygen _____________ Argon _____________
Answer:
Nitrogen = 0.3 atm
Oxygen = 0.25 atm
Argon = 0.45 atm
Explanation:
According to Dalton's law of partial pressure, the total pressure in the container is equal to sum of the partial pressures of the individual gases.
Given;
Total pressure of the gases, P_total = 1 atm
Pressure of nitrogen, P_nitrogen = 0.3 atm
Pressure of oxygen, P_oxygen = 0.25 atm
Pressure of argon, P_argon = ?
[tex]P_{total} = P_{nitrogen} + P_{oxygen} + P_{argon}\\\\1 \ atm= 0.3 \ atm + 0.25 \ atm + P_{argon}\\\\1 \ atm= 0.55 \ atm + P_{argon}\\\\ P_{argon} = 1 \ atm - 0.55 \ atm\\\\ P_{argon} = 0.45 \ atm[/tex]
Therefore, the contribution of each gas to the total pressure of the gas mixture is;
Nitrogen = 0.3 atm
Oxygen = 0.25 atm
Argon = 0.45 atm
Formula to find mass percent of an element
Answer:
Explanation:
Search Results
Featured snippet from the web
To find the mass percent composition of an element, divide the mass contribution of the element by the total molecular mass. This number must then be multiplied by 100% to be expressed as a percent.
what is photosynthesis?
Answer:production of glucose in the presence of light and chlorophyll from carbondioxide and water
Explanation:
Help. Why are state symbols used in chemical equations?
O A. They tell which reactions will happen and which won't.
B. They identify how much product will be made.
C. They identify what phase the substances are in.
O D. They tell how the atoms are arranged in the substances.
Answer:
The answer is option C.
They identify what phase the substances are in.
Hope this helps
Ayuda por favor no entiendo nada voy a reprobar 2- Completa el siguiente cuadro indicando la cantidad de partículas subatómicas fundamentales para cada uno de los siguientes átomos: Atomos | N° atómico | N° de protones | N° de electrones | N° de neutrones 7 Li 20Ne 35Cl 31P 80Br 14C
Answer:
Explanation:
Litio -7 (⁷₃Li)
número de protones = 3
número de electrones = 3
número de neutrones = 4
Neon- 20 (²⁰₁₀Ne)
número de protones = 10
número de electrones = 10
número de neutrones = 10
Cloro - 35 (³⁵₁₇Cl)
número de protones = 17
número de electrones = 17
número de neutrones = 18
Fósforo - 31 (³¹₁₅P)
número de protones = 15
número de electrones = 15
número de neutrones = 16
Bromo - 80 (⁸⁰₃₅Br)
número de protones = 35
número de electrones = 35
número de neutrones = 45
Carbono - 14 (¹⁴₆C)
número de protones = 6
número de electrones = 6
número de neutrones = 8
name the two products when calcium carbonate (CaCO3) is heated
Answer:
The products are Calcium oxide and Carbon dioxide.
Explanation:
When calcium carbonate is heated, thermal decomposition occurs.
Calcium calcium → Calcium oxide + Carbon dioxide
Which refers to the bending of a wave as it passes through one medium to another medium?
Refraction of waves involves a change in the direction of waves as they pass from one medium to another. Refraction, or the bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves
Answer:
B) refraction
Explanation:
Hope this helps
(SOMEONE HELP!!! PLEASE) What are some similarities and differences between ionic and covalent bonds?
Answer:
Ionic and covalent bonds are different in many ways.
Explanation:
A covalent bond is where electrons are shared between several atoms and is apparent in H20 also known as water.
Ionic bonds occur when an atom "gives away" one of its electrons to another one, and due to this difference in charge, they are attracted to each other.
Here is a list of differences:
Ionic bonds are typically strongerCovalent bonds have atoms that are electrically neutral, while ionic bonds have electrically charged atomsCovalent bonds are far more common in nature than ionic bondsCovalent bonds from between two non metals, whereas ionic bonds are formed by a metal and a nonmetalIonic compounds are usually solid whereas Covalent compounds are usually liquid or gasCovalent bonds can form between two atoms of the same element, where this is not possible with ionic bonds.Here are some similarities:
Valence electrons are involved in both bonding processesThe result of both bonds is electrically neutral, even if each individual atom isn'tWhen atoms bond together, they release heat whether or not they are covalent or ionicBoth covalent and ionic bonds lead to stable compounds.Hope this helps!
2.70g of Zn (s) reacts with 50.0 mL of 1.00 M HCl solution to produce hydrogen gas according to the reaction. (R = 0.08206 L·atm·K-1·mol-1) Zn(s) + 2HCl (aq) = ZnCl2 (aq) + H2(g) a) calculate mole of Zn used in this reaction b) calculate mole of HCl used in this reaction c) calculate which reactant is a limiting reactant d) calculate mole of hydrogen gas formed e) calculate volume of H2 gas at STP in Liters that will be produced during the reaction
Answer:
a. 0.0413 moles Zn
b. 0.0500 moles HCl
c. HCl is the limiting reactant
d. 0.0250 moles H₂
e. V = 0.56L
Explanation:
The reaction of Zn(s) with HCl is:
Zn(s) + 2HCl (aq) → ZnCl₂ (aq) + H₂(g)
Where 1 mole of Zn reacts with 2 moles of HCl.
a) To convert mass in grams to moles of a substance you need to use molar mass (Molar mass Zn: 65.38g/mol), thus:
2.70g Zn × (1mol / 65.38g) = 0.0413moles of Zn
b. Now, when you have a solution in molarity (Moles / L), you can know the moles of a volume of solution, thus:
Moles HCl:
50.0mL = 0.0500L × (1.00mol / L) = 0.0500 moles HCl
c. The limiting reactant is founded by using the chemical reaction as follows:
For a complete reaction of 0.0500 moles HCl you need:
0.0500 moles HCl × (1 mole Zn / 2 moles HCl) = 0.0250 moles Zn
As you have 0.0413 moles of Zn, and you need just 0.0250 moles for the complete reaction, Zn is the exces reactant and HCl is the limiting reactant
d.As HCl is limiting reactant and 2 moles of HCl react with 1 mole of H₂, moles of hydrogen formed are:
0.0500 moles HCl × (1 mole H₂ / 2 moles HCl) = 0.0250 moles H₂
e. Using PV = nRT, you can find volume of gas, thus:
PV = nRT
V = nRT / P
Where P is pressure 1atm at STP, n are moles, R is gas consant 0.08206Latm/molK and T is absolute temperature 273.15K at STP.
V = 0.0250molesₓ0.082atmL/molKₓ273.15K / 1atm
V = 0.56L
write the chemical formulae of
a)dinitrogen oxide
b) calcium dihydrogen phosphate
Answer:
A) Dinitrogen Oxide:
=> [tex]N_{2}O[/tex] (Also called Nitrous Oxide)
B) Calcium Dihydrogen Phosphate:
=> [tex]Ca(H_{2}PO_{4})_{2}[/tex] (Also called Monocalcium phosphate)
A student lifts a box of books that weighs 350 N. The box is lifted 4.0 m. How much work does the student do on the box?
Explanation:
F=350N
d=4m
W=F*d
=350*4
=1400 NM
Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices provided. (1) Nonbonding electron pairs are present on the F in the molecule HF. (2) The two atoms involved in a multiple covalent bond must always be atoms of the same element. (3) A molecule of hydrogen peroxide contains the same number of atoms as a molecule of sulfur trioxide does. Group of answer choices All three statements are true. None of the statements are true. Only one of the statements is true. Two of the three statements are true.
Answer:
(1) Nonbonding electron pairs are present on the F in the molecule HF. True
(2) The two atoms involved in a multiple covalent bond must always be atoms of the same element. False
(3) A molecule of hydrogen peroxide contains the same number of atoms as a molecule of sulfur trioxide does. True
Two of the three statements are true.
Explanation:
Non bonding electrons are also known as lone pairs. They are electron pairs present on an atom but are not involved in chemical bonding. They are usually localized on the atom of one of the bonding elements. In HF, there are three nonbonding electrons localized on the fluorine atom that do not participate in chemical bonding.
When multiple bonds are formed between atoms, they must not be atoms of the same element, for instance carbon and nitrogen forms multiple covalent bonds in chemical moieties such as they cyanide ion.
A molecule of hydrogen peroxide (H2O2) contains four atoms just as a molecule of sulphur trioxide(SO3) does.
What did the photoelectric experiment demonstrate?
A. Light can cause electrons to be released from the surface of a
metal.
B. Light can deposit electrons on a metal surface.
C. Light can make metal atoms move around, producing electricity.
D. Light can heat metal enough to produce electricity.
Explanation:
When an electromagnetic wave like light hits a material, the electrons gets emitted. The emission of electrons is called photoelectric effect. The emitted electrons are called photoelectrons. In this process the transfer of energy takes place from light to an electron.
Hence, the correct option regarding the photoelectric experiment is (A) " Light can cause electrons to be released from the surface of a metal."
What type of bond exists between the atoms in a molecule of N2?
Answer:
covalent bonds
Explanation:
Nitrogen atoms will form three covalent bonds (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell.
(if it is still confusing i have another way of explaining so jus let me know :)
Answer: Covalent
Explanation:
what is the molarity of a solution prepared by dissolving 20.0 g of NaOH in enough water to make 0.50 L og solution?
Answer:
Molarity of a solution = 1 mol / L
Explanation:
Given:
Amount of NaOH =20 g
Amount of water = 0.50 l
Find:
Molarity of a solution
Computation:
1 mol of NaOH = 40 g
So,
Moles of NaOH = 20 / 40 g = 0.50 mol NaOH
Molarity of a solution = moles of solute / Liters of solution
Molarity of a solution = 0.50 / 0.50
Molarity of a solution = 1 mol / L
Examine the graph showing the half life of the radioactive isotope substance x. Based on this graph, what might be the best use of thos radioactive isotop?
Determining the age of the objects less than 50000 years old.
Long term radioactive dating such as in dating rocks
Short term radioactive imaging such as nuclear medicine.
Determining the age of objects over 1000000 years old
Answer:
Long term radioactive dating such as in dating rocks
Explanation:
If we examine the graph carefully, we will notice that the number of atoms falls to zero after about 40000 years. This is quite a long time! Many rock formations were formed thousands of years ago and their ages can only be measured by an isotope that has an equally long half life.
Hence for an isotope with such a long half-life, we can effectively measure the age of a rock formation that contains the particular isotope in question. Rocks are composed of diverse chemical isotopes which are normally used to determine the age of the rock formation. Since rocks were formed thousands of years ago, these isotopes must be capable of having a half-life of thousands of years also in order to be useful in measuring the age of rocks.
A balloon is filled with 0.250 mole of air at 35 degrees celsius. If the volume of the balloon is 6.23 liters, what is the absolute pressure of the air in the balloon?
Answer:
pressure = 1.014atms
Explanation:
use ideal gas
PV=nRT
P = (0.250 x 0.08206 x 308)/(6.23)
P = 1.014 atm
A cup of water is put into a freezer and cools to the solid phase within an hour. The water remains at that temperature for six months. After six months, the cup is retrieved from the freezer. The cup is empty. What happened?
Answer:
The frozen water sublimed, moving directly from a solid state to gaseous state. This process although slow, over a time period of 6 months, will eventually result in all the frozen water vaporizing.
Explanation:
The process whereby a solid changes from solid to gaseous state without passing through the liquid phase is known as sublimation. Any solid that turns into a vapor without going through the liquid phase can be said to sublime or "sublimate."
Frozen water or Ice sublimes by turning directly into water vapor without first transitioning into a liquid. Though the process occurs slowly at the temperatures and pressures within household freezers and is not readily observable, over a long period as in the example given, it can then be observed.
Some other examples of ice to water vapor transition include;
1. A wet sweater hung on a line in freezing temperatures. Although it may take a few days, the wet clothing article will eventually dry out.
2. Snow changing to water vapor. On very cold days, when it's too cold for snow to melt, it will after a long while sublime into the air as water vapor.
3. Glaciers undergo ablation which is a form of sublimation. Ablation is the process whereby the snow and ice of the glacier slowly begins to evaporate or turn into vapor.
Answer:
the water has evaporated
Explanation:
The correct increasing order of Bond angle is H2O < NH3 < BCl3 < CCl4 H2O < NH3 < CCl4 < BCl3 NH3 < H2O < BCl3 < CCl4 NH3 < BCl3 < CCl4 < H2O
Answer:
H2O < NH3 < CCl4 < BCl3
Explanation:
Bond angle of a molecule or an ion can be explained by two concepts which are either by their valence shell electron pair repulsion (VSEPR) model or hybridization.
The VSEPR model determines the total number of electron pairs surrounding the central atom of the species. All the electron pairs will orient themselves in such a way as to minimize the electrostatic repulsions between them. These repulsions hence determine the geometry of the covalent bond angles around the central atom.
Hence; as the number of lone pairs increases from zero to 2 the bond angles diminish progressively.
Hybridization is the mixing and blending of two or more pure atomic orbitals to form two or moe hybrid atomic orbitals which are identical in shape and energy. During the process of formation of these hybrid orbitals, The bonds formed i.e the sigma bond and the pi bond determines the bond angle of such compound.
From the given compounds;
H20 have a bond angle of 104.5°
NH3 have a bond angle of 107°
BCl3 have a bond angle of 120°
CCl4 have a bond angle of 109.5°
thus in an increasing order of bond angle:
H2O < NH3 < CCl4 < BCl3
Choose all the answers that apply
Plasma is made of:
free electrons
clumped atoms
n neutral atoms
free protons
ions
Answer:
free electrons
ions
neutral atoms
Explanation:
Plasma is a subset of gases that can be generated in the laboratory by warming the gas at a very high temperature. In other words, we can say it is jelly or that material which is moldable
It is made up of free electrons, ions, neutral atoms
Therefore according to the question, plasma is made of free electrons, ions and neutral atoms
Answer:
ions
free electrons
neutral atoms
Explanation:
A metal sample is heated and placed into the water in a calorimeter at room temperature. Which statement best describes how the calorimeter can be used to determine the specific heat capacity of the metal sample? Energy transfers to the metal from the water and calorimeter until they are all at room temperature. Energy transfers from the metal to the water and calorimeter until they are all at room temperature. Energy transfers to the metal from the water and calorimeter until they all reach a single temperature. Energy transfers from the metal to the water and calorimeter until they all reach a single temperature.
Answer:
Energy transfers from the metal to the water and calorimeter until they are all at room temperature.
Explanation:
Calorimetry is the process that is used to determine the amount of heat that has been transferred in any process. In any chemical or physical process, the amount of energy is required. This energy is measured by the process of calorimetry. A calorimeter is a device that is used in this process. The heat that has been used in the process is measured and the change in the temperature is noted.
Answer:
b
Explanation:
HELP NEEDE ASAP Why NH3 ACTS AS BRONSTED-LIWERY BASE?
Answer:
NH
3
acts as a Bronsted-Lower acid by giving its lone pair electrons.
Only in reaction 1 and 2 it acts as Bronsted-Lowry acid.
Explanation:
hope it's help you
What are two important fuels that comes out of the oil refining process?
Diesel fuel and kerosene.
Gasoline and diesel are used as fuels for motor vehicles.
Kerosene is used as jet fuel.
Naphthar is a major petrochemical feedstock.
I hope this helps..
HELP ME PWhat are the reactants in a chemical reaction?
O A. The ending substances
B. New substances that are formed
O c. All substances that are involved
O D. The starting substances
Answer:
D. the starting subtances
:)
Answer: D. The starting substances !!
Explanation:
how many significant figures are in 3,200,000.0 kilometers
Answer:
2
Explanation:
significant figures begin from {1,2,3, ...}
The number of significant figure in 3,200,000.0 km has been 2. Thus, option A is correct.
The significant figure has been given as the number of digits in the value that has been responsible for the accuracy of value. It has been given as digits in a number.
For example, significant figure (S) in following has been:
[tex]3.4\;\times\;10^4\\S=2\\[/tex][tex]346209\\S=6[/tex]The number of significant figure in 3,200,000.0 km has been:
[tex]3,200,000.0=3.2\;\times\;10^6\\\implies 3.2\;\times\;10^6\\S=2[/tex]
The number of significant figure in 3,200,000.0 km has been 2. Thus, option A is correct.
For more information about significant figures, refer to the link:
https://brainly.com/question/11904364
Why do alkenes not appear in the periodic table
Answer:
Alkenes are unsaturated hydrocarbons.
Alkenes do not appear in the periodic table because the periodic table consists only of elements.
I'll mark you brainliest if you answer first! - Iron filings and copper (II) sulphate solution are mixed together and they produce elemental copper and iron (II) sulphate solution. Based on the quantities of the reactants used in the experiment, determine which is the limiting reagent. For the excess reagent, determine how much in grams is left over. (2 grams of iron was used, and 7 grams of copper
Answer:
First, write an equation for the reaction involved.
Fe + CuSO4 ---> FeSO4 + Cu
Now, calculate the no. of moles added in the reaction. (n.o.m. = mass /molar mass)
No. of moles of Fe added = 2 / 55.8
= 0.0358 mol
No. of moles of CuSO4 = 7 / (63.5 +32.1+16x4)
= 0.04386 mol
From the equation, the mole ratio of Fe : CuSO4 = 1:1,
meaning 1 mole of Fe reacts with 1 mole of CuSO4.
It also indicates that the no. of moles reacted in Fe equals to the no. of moles reacted in CuSO4.
0.04386 > 0.0358
The no. of moles of CuSO4 is higher than that of Fe, meaning all moles of Fe will be reacted while not all CuSO4 reacts.
Hence Fe is the limiting reagent, and CuSO4 is in excess.
All 0.0358 moles of Fe reacts, meaning the no. of moles of CuSO4 left unreacted = 0.04386 - 0.0358
= 0.0080596mol
mass of CuSO4 unreacted = 0.0080596 x (63.5 +32.1+16x4)
= 1.28g