Answer:
I believe it 3
The pictures below show samples of different substances.
The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?
A. No, because they have different masses.
B. No, because they have different volumes.
C. Yes, if each sample contains 6.02 x 10^23 atoms.
D. Yes, if each sample contains 2 amu.
Answer:
C. Yes, if each sample contains 6.02 x 10²³ atoms.
Explanation:
It is possible for each sample to contain 1 mole of each sample if and only if each of the sample if made up of 6.02 x 10²³ atoms.
6.02 x 10²³ atoms is the Avogadro's number. This number is equivalent to a mole of a substance.
If the amount of matter in the given substance is at least one mole, it is possible that they are made up of one mole each of each substance. If they contain lesser amount of atoms, then it is not up to one mole of substance. But if it is greater, then, we can have even more than one mole of substance.A mole is simply a unit of measurement and it is equivalent to 6.02 x 10²³ atoms.
Answer:
C
Explanation:
i just took the test
:)
hello, please can you solve my question:
an atom contains 22 protons and 26 neutrons. What is it's mass number?
I will mark brainliest
i have 9 protons, 10 neutrons, and 5 electrons. what is the charge of my nucleus?
Answer:
+4
Explanation:
what is the theoretical yield (in mols) of magnesium when 1.1 x 102 mols of lithium reacts with excess magnesium chloride.
Explanation:
Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams.
Can you pls help me
Answer:
the elk population will increase
Explanation:
because the gray wolves eat the Elks so introducing them back into the food chain will mean that more Elks are eaten!
hope that helps
To have a system you need more than one magnet .
true or false
Answer:
True
Explanation:
Answer: true
Explanation:
For 30 points pls help me with this question
Answer:
a put a as you answer you rock do not give up on your dreams
What tuberculosis means "
Answer:
it is a infectiousr bacterial disease characterized by the growth of nodules(tubercles) in tissues especially the lungs
Identify the properties of a covalent substance (multiple answers )
A) high melting point
B) low melting point
C) soluble in water
D) soluble in alcohol
E) conducts electricity in water
does not conduct electricity in water
A) high melting point
C) soluble in water
D) soluble in alcohol
E) does not conduct electricity in water
these options are a bit vague as some covalent substances dissolve in water / alcohol while some don't
How could we separate the baking soda from the after after it had already been mixed in? helppp!!!
Answer:
i thing by filtering
Explanation:
I will give you a lot of points help me ASAP please I am begging you
Answer:
hope this helps
Explanation:
Place the following metals in order of most reactive to least:
Aluminium
Calcium
Copper
Iron
Magnesium
Sodium
Zinc
Answer:
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron
Copper
Explanation:
ASAP HELP WILL MARK BRAINLIEST FOR BEST ANSWER. MUST ANSWER WITHIN 6 MIN!!!
Answer:
3 molecules
Explanation: i got it right on the test, also because the 2 other ones are compounds because they have hyrdogen and oxygen attached and molecules just have particles of one element attached
Answer:
3 molecules
Explanation:
Which spot (30° or 90°) on the paper received the greatest amount of energy?
Answer/Explanation: At high angles like 90 degrees, the light doesn't spread out as much and has a more circular shape. As the ... Solar angle influences how much energy is received in an area.
-Bababooeyboy
Why do chemical changes happen
Answer:
Reactions occur when two or more molecules interact and the molecules change. ... Bonds between atoms are broken and created to form new molecules. That's it.
Explanation:
Explain the effect of pressure on the following chemical equation :
[tex]CaCO_3 = CaO + CO_2[/tex]
2. Explain the effect of concentration in the following equation :
[tex]3Fe \: +4H_2O= Fe_3 \: O_4 + 4H_2[/tex]
Answer:
Explanation:
One
Pressure will favor the side with the least number of mols if it the larger number of moles counts only the gases. (Le Chetalier's Principle). In this case both CaCO3 and CaO are not soluble in water. The only gas is CO2. Since it represents the most number of mols the reactant is favored.
More or Less are very troublesome words in beginning science. Make sure you understand their meaning for this question. The more pressure applied, the more the reactants will be favored and the equation shifts left.
Two
Fe and Fe3O4 are both solids. It depends on the form that water takes. Looking it up, it is shown to be in a gas form. That means if you increase the pressure, nothing will happen. That is not your question, but you should note it.
The answer to your question is you increase the concentration of Fe or H2O, the equilibrium will shift right.
If you add more Fe3O4 or hydrogen it will shift left.
Chemists say that if you alter the equilibrium the equation will shift in the opposite direction to compensate for the action you have taken.
Drag the tiles to the correct boxes to complete the pairs.
Match the sequences with the mutations that occurred in them.
deletion translation inversion duplication
translocation
inversion
duplication
Answer:
Yall are coming after that person above me when theres no diagram!!!! HELLO????????????? crazy
Explanation:
A student views four models showing magnified views of the phases of matter.
What question will best help the student determine which model is plasma?
A
Which model is composed of rapidly moving particles?
B.
Which model is composed of particles vibrating in place?
C
Which model is composed of electrically charged particles?
Which model is composed of particles sliding past each other?
Answer:
C Which model is composed of electrically charged particles?
Explanation:
The best question to resolve and determine the model which is plasma is to find one that is composed of electrically charged particles.
Plasma is one of the states of matter which is characterized by ions and other charged particles.
Matter is anything that has weight and occupies space.
There are four known states of matter which are:
Solid Liquid GasPlasmaPlasma is the only state of matter made up of charged particles.
In a salt synthesis experiment, 13.1 g of sodium reacts with 94 g of chlorine gas, yielding 22.5 g of sodium chloride. 2Na(s) + Cl2(g) →2NaCl(s) What is the percent yield for this experiment?
Answer:
67.58%
Explanation:
First we convert the masses of the reactants into moles, using their respective molar masses:
Na ⇒ 13.1 g ÷ 23 g/mol = 0.570 molCl₂ ⇒ 94 g ÷ 70.9 g/mol = 1.32 molBy looking at the reaction equation, we know that 1.32 moles of Cl₂ would react completely with (2 * 1.32) 2.64 moles of Na. There are not as many Na moles, so Na is the limiting reactant.
Now we calculate how many NaCl moles would have been produced if all the limiting reactant was consumed:
0.570 mol Na * [tex]\frac{2molNaCl}{2molNa}[/tex]= 0.570 mol NaClWe convert those moles to grams:
0.570 mol * 58.44 g/mol = 33.31 g NaClFinally we calculate the percent yield:
22.5 g / 33.3 g * 100% = 67.58%
PLEASE HELP I WILL MARK AS BRAINLESS 12+ POINTS!!
Which of the following reasons BEST explains why thunderstorms are likely to form on a hot day?
A warm, humid air rises quickly and then condenses into rain clouds.
B) as air rises, it loses temperature and causes rain.
C the air is usually calm and allows the clouds to form
D the air drops quickly and forms low level cloud layers.
Answer:
A
Explanation:
The high humidity, in conjunction with warm temperatures, creates massive amounts of warm, moist air rising into the atmosphere, where it can easily form a thunderstorm. As the process of evaporation and condensation occurs, these droplets collide with other moisture that is condensing as it rises.
. In a full paragraph, tell what would you do to remove the kudzu from your property forever and what steps you will take to ensure your land and the native species on it are not being harmed. pls answer now
Efforts to control kudzu infestations have included the following methods: cutting, grazing, digging, disking, prescribed burning and application of herbicides. Roots of mature plants grow too deeply to be affected by freezing. Burning will kill only the very young plants.
Ideally, simply pulling out the heavy vines would prevent the kudzu from returning. However, you still need to kill each of the rooted stems at their crowns. Mowing or cutting back the vegetation to the ground provides the first step in removal. Then it’s time to bring out the big guns in the form of chemical herbicides.
Please help me out with this assignment
Answer:
1. 7 meters
2. gullet
4. Not sure about this
6. strong
7. digestive
8. starch
12. Not sure about this either
14. Water
15. Jejunum
19. teeth
Hope this helps!
The process by which water, ice, wind and gravity remove and transport sediment from one place to another
A. Chemical weathering
B. Deposition
C. Physical weathering
D. Erosion
Answer:
either deposition or physical weathering
Answer:
D. Erosion
Explanation:
If the theoretical yield of a reaction was calculated to be 42.6 grams and when the
experiment was conducted the amount produced was 20.7 grams, the what is the percent
yield of the experiment?
Answer:
48.59%
Explanation:
theoretical yield = 42.6g
actual yield = 20.7g
% yield = 20.7/42.6 x 100 = 48.59% (2 d.p.)
A chemical reaction yields 1 mole of lithium hydroxide (LiOH). How many grams of
lithium hydroxide are present?
3 g
48 g
728
24 g
Mass of LiOH= 23.95 grams ≈ 24 g
Further explanationGiven
1 mole of lithium hydroxide (LiOH)
Required
Mass of LiOH
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
n = mass : molar mass
Input the value :
mass = n x molar mass
mass = 1 mole x 23,95 g/mol
mass = 23.95 grams ≈ 24 g
The mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
The mass of a compound present in a mole of sample has been equivalent to the molar mass of the compound. The molar mass of the compound has been the sum of the constituent in a formula unit.
The molar mass of lithium hydroxide (mwt) has been given as:
[tex]mwt=m_L_i\;+\;m_O\;+\;m_H[/tex]
Where, the mass of Li is [tex]m_L_i=6.941\;\rm g[/tex]
The mass of oxygen is [tex]m_O=16\;\rm g[/tex]
The mass of hydrogen is [tex]m_H=1\;\rm g[/tex]
Substituting the values for molar mass (mwt) of LiOH:
[tex]mwt=6.941\;+\;16\;+\;1\;\text g\\mwt=23.941\;\text g\\mwt=24\;\text g[/tex]
The molar mass of LiOH has been 24 g.
The molar mass has been equivalent to the mass of 1 mole of sample. Thus, the mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
For more information about mass of mole, refer to the link:
https://brainly.com/question/1370888
please help me i really am struggling
Answer:
It is visible light
Explanation:
How much heat is necessary to change 10.0g of water from 20 degrees celsius to 75 degrees celsius
Answer:
6
Explanation:
how can I identify a salt compound is acidic,basic,neutral
Salts that are from strong bases and strong acids do not hydrolyze. Salts that are from strong bases and weak acids do hydrolyze, which gives it a pH greater than 7. Salts of weak bases and strong acids do hydrolyze, which gives it a pH less than 7.
The _energy of the baseball is the sum of the kinetic energy and _energy of the particles that make up the baseball
Answer:
Mechanical energy
Kinetic energy
Explanation:
The mechanical energy is the sum of the kinetic and potential energy of the particles that make up the baseball.
Mechanical energy is made up of kinetic energy and potential energy. When the baseball is in motion, the particles make use of the kinetic energy, also known as motion energy and when the ball is not in motion the particles make use of the potential energy, also known as stored energy.
If the mass of an object is 15kg and the volume of an object is 15ml, what is its density?
0 225kg/ml
Okg/ml
1kg/ml
30kg/ml
Answer:
1kg/ml
Explanation: