Answer:
0.3991
Explanation:
no. of moles = mass/molar mass.so lets get the molar mass of MgCl2
(Mg=24.305 and Cl=35.453) so the molar mass of MgCl2= 24.305+(2*35.453)
molar mass of MgCl2= 95.211
now lets get the no of moles:no of moles=38g/95.211=0.3991
What is a characteristic of asexual reproduction?
Answer:
Sexual reproduction
What can the period number of an element tell us about that element?
Answer:
All of the elements in a period have the same number of atomic orbitals.
Explanation:
This is hard, isn't it? please help me though. PLEASE
How many atoms are in magnesium acetate!? Please I cant answer its and feel free to add me
Answer:
Hey this is your answer 59.05.
Explanation:
C) $18.06 \times {10^{23}}$ D) $24.08 \times {10^{23}}$ Hint: In order to find the number of atoms in 48 g of Mg, use the formula which relates the number of particles/atoms with the Avogadro number and number of moles of the substance and this required formula is: number of atoms = number of moles × Avogadro's number.
Please can I have brainliest :]
How do the ideas of electrolytes and IV fluids relate?
Answer:
Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).
Explanation:
Answer:
Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help
Balance the amount of water in your body
Balance your body's acid/base (pH) level
Move nutrients into your cells
Move wastes out of your cells
Make sure that your nerves, muscles, the heart, and the brain work the way they should
Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.
The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.
Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.
hope it's help you plz mark as brain listWhich statement is true regarding nuclear power plants?
The disposal of radioactive wastes is an intended benefit.
Uranium mining is an intended benefit.
Damage caused to the environment is an unintended consequence.
The creation of large amounts of electricity is an unintended consequence.
but its c because it dealing with power
Explanation:
Concerning the structure of molecules, the biggest factor that affects solubility is
Your answer:
A. polarity
B. tarnish
C. mixiness
Answer:
A
Explanation:
Have a nice day
A container of hydrogen peroxide originally has a mass of 28.96 grams and then completely decomposes into water and oxygen gas. The mass of water produced is 15.33 g. What mass of oxygen gas was also produced?
Answer:
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In the graphic,
X represents which element?
31
x
15
Answer:
B. X represents phosphorus
Explanation:
In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.
QUICK HURRY FIRST ANSWER GETS BRAINLIST!!!! Why is it important to add coefficients to the
reaction equation to make it balanced? (Hint: your
answer should talk about the law of conservation of mass)
Which of the following is a part of the kinetic-molecular theory?
(PLEASE HELP)
Your answer:
Most of the volume of a gas is occupied by gas particles.
The particles of a gas are in constant, random motion.
The average kinetic energy of a gas is dependent upon the identity of the gas.
Gases have indefinite shape and indefinite volume.
Attractive forces between gas molecules must be accounted for with a gas law calculation.
Answer:
2)The particles in a liquid are moving past one another constantly.
3)The particles in gas move freely in all directions.
4)The particles in a solid vibrate in a fixed position.
6)The particles in a gas have few attractions between them.
7)The particles in all states of matter are always moving.
Explanation:
Which change does not increase the speed of reaction between zinc and hydrochloric acid?
By adding the decreasing the temperature, the speed of the reaction will not be increased.
What is speed of the reaction ?The reaction rate, which is a measure of how quickly reactants are consumed as well as products are created, determines the speed of a reaction.
When the temperature is lowered, the molecules move more slowly and collide less. The reaction's speed is slowed as the temperature drops.
Therefore, by adding the decreasing the temperature, the speed of the reaction will not be increased.
To know more about speed of reaction.
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can someone help me figure out what the Lewis structure for NCl2−?
Answer:
Chlorine is in group 7A, so it has 7 valence electrons
The Lewis structure for the molecule NCl²⁻ with -2 charge is attached in the image below.
What are Lewis structures?Lewis structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .
They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.
They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.It helps in understanding the bonding between the two atoms.
Learn more about Lewis structures,here:
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A friend tells you that's after a candle burn there is less matter than before the flame was lit is your friend correct explain why or why not
Answer:
See explanation
Explanation:
The law of conservation of matter states that "matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same."(Virginia)
Hence, the quantity of matter present before and after the candle burn must remain the same in accordance with this law stated above.
Hence, my friend was not correct.
Methanol, CH3OH, is the simplest of the alcohols. It is synthesized by the reaction of hydrogen and carbon monoxide. Write chemical reactions. If 500 mol of CO and 750 mol of H2 are present, which is the limiting reactant?
Answer:
The limiting reactant is H₂
Explanation:
The reaction of hydrogen (H₂) and carbon monoxide (CO) to produce methanol (CH₃OH) is the following:
2H₂(g) + CO(g) → CH₃OH(g)
From the balanced chemical equation, we can see that 1 mol of CO reacts wIth 2 moles of H₂. So, the stoichiometric ratio is:
2 mol H₂/1 mol CO = 2.0
We have 500 mol of CO and 750 mol of H₂, so we calculate the ratio to establish a comparison:
750 mol H₂/500 mol CO = 1.5
Since 2.0 > 1.5, we have fewer moles of H₂ than are needed to completely react with 500 moles of CO. In fact, we need 1000 moles of H₂ and we have 750 moles. So, the limiting reactant is H₂.
calculate the number of moles of al2o3 that are produced when 3.60 mol fe is produced in the following equation. 2Al+3FeO—> 3Fe+Al2O3
Answer:
5. a
Explanation:
Al+3FeO—> 3Fe+ Al2O3
3.60—>3.60÷3=1.20 (mol)
For the balanced equation shown below, how many moles of N2 will react with 0.3034 moles of Mg?
3 Mg + N2 Mg3N2
Round answer to 4 sig-figs.
Answer:
0.1011 moles of N₂
Explanation:
This is the reaction:
3 Mg + N₂ → Mg₃N₂
3 moles of magnesium can react to 1 mol of nitrogen in order to produce 1 mol of magnesium nitride.
We can solve this by a rule of three:
3 mol of Mg need 1 mol of N₂ for the reaction
Then, 0.3034 moles of Mg may react to (0.3034 . 1) / 3 = 0.1011 moles of nitrogen.
The stoichiometry is 3:1
CAN SOMEONE PLEASE HELP ME?!
Answer:
no
Explanation:
because
Carbon dioxide goes into a plant's leaves when it's photosynthesizing is this an example of diffusion or osmosis or neither?
Answer:
diffusion
Explanation:
plants have stomata at the bottom of their leaves. these allow for CO2 to diffuse in and out of the plant.
What does the prefix “geo” mean?
Please Help
I will give you Brainlist
Thread-like structures that are found in the nucleus of a cell that contains all DNA.
A.) DNA
B.) Genes
C.) Chromosomes
D.) Nucleus
three ways how travelers should be considerate towards other travelers when using public transport
The three ways in which travelers should be considerate when using public transport include the following:
Use of headphonesUsing a handkerchief when sneezingNot stepping on people by being aware and vigilantWhat is a Public transport?This is the type of transport which is available to the general public such as trains, buses etc.
It is best to be considerate when using it by applying the following methods mentioned above to prevent disturbance and conflict.
Read more about Public transport here https://brainly.com/question/1299303
I can determine the molar mass of an element by looking on the Answer under the atomic mass for the element.
Answer:
YES that is the molar mass can be found as the atomic mass of a single atom, BUT when you get to larger molecules your molar mass will be a combination of atomic masses.
Explanation:
1. Write the word equation for the reaction occurring between lead nitrate and sodium chloride. 2. From your answer in 1 write a balance chemical equation showing all state symbols. 3. Then write the ionic equation for the react ion occurring.
Explanation:
Word Equation
Lead Nitrate + Sodium Chloride --> Lead Chloride + Sodium Nitrate
Balanced Chemical Equation
2 NaCl (aq) + Pb(NO3)2 (aq) → PbCl2 (s) + 2 NaNO3 (aq)
Ionic Equation
In an ionic equation, the aqueous species in the reaction are broken up into ions.
2Na⁺ + 2Cl⁻ + Pb²⁺ + 2NO₃⁻ → PbCl2 (s) + 2Na⁺ + 2NO₃⁻
I need help I tried many times and I don’t get it
Answer: ummm what is this cause I don't get it either
Explanation:
i need help with this to lol
6. Besides hydrogen and the polyatomic ion ammonium, what type of element forms cations: metal, metalloid, non-metal?
Answer: Metals
Explanation:
When an atom accepts an electron negative charge is created on atom and is called as anion.
When atom loses an electron positive charge is created on atom and is called as cation.
The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Thus metals form cations.
What pattern do we see when looking at the fossil record? *
Organisms became more complex over time
Organisms became simpler over time
Organisms changed very quickly over time
Answer:
Organisms become more complex over time.
Explanation:
We all evolved from the first bacteria, which was relatively simple. We see over time that things become more adapted, slowly adding eyes, lungs, behavioral patterns, and consciousness.
The
of a chemical reaction is the maximum amount of product that can be produced
Answer= Maximum amount of product that could be obtained under ideal conditions from a given amount of reactants.
Explanation:
The theoretical yields is the ideal maximum amount of a product that can be produced during a chemical reaction while the limiting reactant is the reactant that determines the maximum amount of product that can be formed. mitgliedd1 and 61 more users found this answer helpful.
If you had 3.6 moles of AI(NO3)3, how many grams would you expect to have?
766.7856 g
Molecular weight of Aluminium Nitrate is 212.996 g/mol. 3.6 moles of Aluminium Nitrate is: 212.996 × 3.6 = 766.7856
Separation units often use membranes, absorbers, and other devices to reduce the mole fraction of selected constituents in gaseous mixtures. Consider a mixture of hydrocarbons that consists of 62 percent (by volume) methane, 28 percent ethane, and 10 percent propane. After passing through a separator, the mole fraction of the propane is reduced to 1 percent. The mixture pressure before and after the separation is 100 kPa. Determine the change in the partial pressures of all the constituents in the mixture.
Answer:
See explanation
Explanation:
We first obtain the mole fraction of propane at the start and end;
0.01 = x/0.62 + 0.28 + x
0.01[0.62 + 0.28 + x] = x
0.01[0.9 + x] =x
9 * 10^-3 + 0.0.1x = x
9 * 10^-3 = x - 0.0.1x
9 * 10^-3 = 0.99x
x = 9 * 10^-3/0.99
x = 9.09 * 10^-3
After
For methane
0.62/ 0.28 + 0.62 + 9.09 * 10^-3 = 0.68
For ethane
0.28/0.28 + 0.62 + 9.09 * 10^-3 =0.31
Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa
Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa
Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa