Answer:
Explanation:
Balanced equation :
2NaOH (aq) + Mg(NO3)2 (aq) → Mg(OH)2(s) + 2NaNO3(aq)
2 mole NaOH reacts with 1 mole Mg(NO3)2 to produce 1 mole Mg(OH)2.
Check for limiting reactant :
Mol NaOH in 200.0 mL of 0.125 M solution
Mol = 0.125 mol/L * 200 mL / 1000 mL/L = 0.025 mol
This will react with 0.025 / 2 = 0.0125 mol Mg(NO3)2
Mol Mg(NO3)2 in 400 mL of 0.025 M solution
= 400 mL / 1000 mL/L * 0.025 mol /L = 0.01 mol Mg(NO3)2
The NaOH is in excess and the limiting reactant is Mg(NO3)2
0.01 mol Mg(NO3)2 will produce 0.01 mol Mg(OH)2
Molar mass Mg(OH)2 = 58.32 g/mol
Mass of 0.01 mol Mg(OH)2 = 0.01mol * 58.32 g/mol = 0.5832 g
Product isolated was 0.45 g
Percent yield = Product / Reactant * 100%
= 0.45 / 0.5832 * 100%
= 77.16% yield.
PLEASE NEED HELP!!!!!
Name the following compound
Answer:
3-methylhexane
Explanation:
For naming alkane molecules follow the following steps
1) Find the longest continuous carbon chain and count the number of carbons
In this structure, it is from the bottom, then up, then to the right. Making a right angle. There is 6 carbons in this chain which means it's a hexane
2) Number the longest carbon chain so the constituents (parts not part of the carbon chain) are connected to the carbon with smallest number possible.
This gives the extra CH3 group connected to carbon 3
3) Put it all together
Methyl connected to carbon 3 + hexane
3-methylhexane
Urgent, please walk me through this
Answer:
H
Explanation:
can some please help me with this question
Answer:
the first would be an polar compound the second would be a ionic compound and the third would be nonpolar compound
Denaye drives 25 km to work every day along the route tgere is a traffic light every 5,000 meters. How many traffic lights does denaye pass on her way to work
Answer:
5
Explanation:
1km = 1,000m
5km = 5,000m = 1 light
25/5 = 5
which 19th- century art movement most directly influenced the development of abstract art in the 20th century?
A: Realism
B: Romanticism
C: Impressionism
D: Post-Impressionism
Answer:
B.
Thank goodness for all the help you can
Explanation:
Basta
A 35.3g of element M is reacted with nitrogen to produce 43.5g of compound M3N2.what is (i) the molar mass of the element (ii) Name.of the element
The molar mass of M is 40.2 g/mol and the name of the element is Calcium.
35.3g of element M reacted with nitrogen to produce 43.5g of compound M3N2.
Chemical reaction3M + N₂→ M₃N₂
Therefore,
let the molar mass of element = x
35.3 g of M = 43.5 g of M₃N₂
3x g of M = 3x + 28
cross multiply
35.3(3x + 28) = 43.5(3x)
105.9x + 988.4 = 130.5x
988.4 = 130.5x - 105.9x
988.4 = 24.6x
x = 988.4 / 24.6
x = 40.1788617886
x = 40.2
Therefore, the molar mass of M is 40.2 g/mol and the name of the element is Calcium.
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Suppose you have a sample of table salt (NaCl) that has a mass of 100.0 grams. If
this amount of salt is added to a large beaker and filled with water until the total
volume is 2 liters, what is the concentration of this solution in units of Molarity?
Please do not include any units in your answer.
Taking into account the definition of molarity, the concentration of the solution is 0.855 [tex]\frac{moles}{liter}[/tex].
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Molarity of NaClIn this case, you have:
number of moles of NaCl= [tex]100 grams\frac{1 mole}{58.45 grams} =[/tex]1.71 moles (being 58.45 g/mole the molar mass of NaCl)volume 2 LReplacing in the definition of molarity:
[tex]Molarity=\frac{1.71 moles}{2 L}[/tex]
Solving:
Molarity= 0.855 [tex]\frac{moles}{liter}[/tex]
Finally, the concentration of the solution is 0.855 [tex]\frac{moles}{liter}[/tex].
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How much energy is produced in each stage cellular respiration and how is it used?
Answer:
Some of the energy from the electrons is used to pump hydrogen ions across the membrane, creating an electrochemical gradient that drives the synthesis of many more molecules of ATP. In all three stages of cellular respiration combined, as many as 38 molecules of ATP are produced from just one molecule of glucose.
Explanation:
_____ resources are resources that cannot be replenished within a lifetime.
Question 1 options:
Nonrenewable
Renewable
Living
Endangered
Answer:
Non Renewable would be correct option
Explanation:
Non Renewable resources are resources that cannot be replenished within a lifetime.
These resources cannot be replaced after once used.
Examples of Non Renewable resources are Coal , Petroleum & gas etc .
when acid reacts with Base what result
Strong Acid + Strong Base = Neutral Salt + H2O
Strong Acid + Weak Base = Acidic Salt + H2O
Weak Acid +Strong Base = Basic Salt + H2O
A container holding four gases has a total pressure of 1.05 atm. Calculate the patrial pressure of carbon monoxide in a container that holds 0.5 atm of carbon dioxide, 0.3 atm of nitrogen, and 0.1 atm of hydrogen
Answer:
The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.
Which subatomic particle cannot change in an atom?
Proton, Neutron, Electron
Answer: Protons cannot change in an atom because that would change the identity of a particle. Electrons on the other hand can be added or removed creating an ion. Neutrons can also be added or removed to create an isotope.
Which is a fossil fuel? A. Biomass B. Wind C. Nuclear D. Petroleum
Answer:
(D) petroleum
Explanation:
because as we know that petroleum is obtain from the sea bed,within the remains of animals and plants which lived millions of year ago......
CK12 Stoichiometry and Thermochemical Equations
4/10
Use the following thermochemical equation:
2Na(s) + Cl2(g) + 2NaCl(s) + 822 kJ
A certain reaction releases 471 kJ of heat. What mass of NaCl
was produced in the reaction?
The mass of sodium chloride (NaCl) produced from the reaction when 471 KJ of heat is released is 67.04 g
Balanced equation2Na + Cl₂ —> 2NaCl ΔH = + 822 kJ
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Mass of NaCl from the balanced equation = 2 × 58.5 = 117 g
SUMMARY
From the balanced equation above,
When 822 KJ of heat is released, 117 g of NaCl were produced.
How to determine the mass of NaCl producedFrom the balanced equation above,
When 822 KJ of heat is released, 117 g of NaCl were produced.
Therefore,
If 471 KJ of heat is released, then = (471 × 117) / 822 = 67.04 g of NaCl will be produced
Thus, 67.04 g of NaCl were obtained from the reaction
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The following questions refer to the equilibrium shown here:
4NH3(g) + 5O2(g) <-> 4NO(g) + 6H2O(g)
For a certain reaction at 25.0°C, the value of K is 1.2 × 10–3. At 50.0°C the value of K is 3.4 × 10–1. This means that the reaction is:
a. Never favorable
b. More information needed
c. Endothermic
d. Exothermic
e. None of the above
The value of K changes, affected by temperature
Endothermic (ΔH = +): temperature rises ⇒ K increases
Exothermic (ΔH = -): temperature increases ⇒ K decreases
From the data in the problem, the value of K increases in proportion to the temperature, then the reaction is said to be endothermic (C)
A 35.3g of element M is reacted with Nitrogen to produce 43.5g of compound M3N2. What is the molar mass of the Element?
Balanced chemical reaction
[tex]\\ \rm{:}\dashrightarrow 3M+N_2\longrightarrow M_3N_2[/tex]
3 mol weighs 35.3gMolar mass=35.3/3=11.77g/molwhen methane reacts with oxygen, the products are carbon dioxide and water. How many grams of carbon dilxide are formed if 30 g of methane react completely with 75 g of oxygen to form 50 g of water?
Answer:
CH4+2O2→CO2+2H2O
Moles of oxygen=3232=1
Moles of carbon dioxide=4422=0.5
Moles of water=1818=1
1 mole of methane reacts with 2 moles of oxygen to give 1 mole of CO2 and 2 moles of water so 0.5 mole of methane will be required which is equal to 0.5×16=8g.
Explanation:
8g
Please see the attached file and answer. I need this ASAP!
Giving Brainliest!
Answer:
Answer no. 2
Explanation:
Distillation is the process of separating consistent solids from a liquid mixture
HELPPPPP How is precipitation related to high- and low-pressure air? A) High-pressure systems lead to rain B) Low-pressure systems lead to rain. C) Both high- and low pressure systems lead to rain. D) Neither high- nor low-pressure systems lead to rain
Why? Because high-pressure systems don't allow vapor to get high enough to "become clouds," therefore it will not rain. :)
~pinetree
Why does a floating leaf indicate photosynthesis has occurred
Name the four states of matter, and a characteristic to describe each.
Answer:
solid particles are tightly held.
liquid particles have perfectly inelastic collisions
gas move in constant random motion
vapour
Based on what you learned in the video, draw a model that shows how weathered rock turns into sedimentary rock. Use the paragraph above to guide you, and label all parts of the process. Mark the location of highest pressure.
Answer:
This is what it looks like! Mark brainliest if u think im right <3
Explanation:
Weathering and erosion on the Earth's surface break down volcanic rock becoming pebbles, sand, as well as mud, resulting in sedimentary rock.
What is sedimentary rock?Sedimentary rock, rock generated at or near the Earth's surface as a result of sediment deposition and lithification or precipitation into solution at typical surface temperatures.
Sedimentary rocks are among the most frequent on the Earth's surface, although they make up just a minuscule portion of the crust, which would be dominated by metamorphic and igneous rocks.
Weathering and erosion on the Earth's surface break down volcanic rock becoming pebbles, sand, as well as mud, resulting in sediment that collects in basins just on Earth's surface. The image for the formation of sedimentary rock is given below.
Therefore, weathering and erosion on the Earth's surface break down resulting in sedimentary rock.
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12.
Which of the following does not indicate that a chemical reaction occurred when the iron filings
were added to the copper(II) sulfate?
You didn't provide the answer choices so I'll give all that I know.
No color change occurs
No odor is produced
No gas is produced
No temperature change occurs(Stays at room temp)
No precipitation occurs
2 SO2(g) + O2(g) + 2 H2O(ℓ) −→ 2 H2SO4(ℓ)
What mass in grams of SO2 is needed to
react with 1527 g of O2?
Answer:
6116g
Explanation:
2SO2(g) + O2(g) + 2H2O(ℓ) −→ 2H2SO4(ℓ)
We want to find the mass in grams of SO2 that is needed to react with 1527 g of O2. First we must convert the grams of O2 to moles of O2 then to moles of SO2 and then to grams of SO2
So first lets find the molar mass of O2
The mass of oxygen according to a periodic table is 15.999
Using this the mass of O2 would be 15.999(2) = 31.988g
Next we need to identify the mole ratio of O2 to SO2
Looking at the equation for 1 mole of O2 there are two moles of SO2
Next we need to find the molar mass of SO2
Again the mass of oxygen is 15.999g and the mass of Sulfur is 32.066
So the mass of SO2 would be 15.999(2) + 32.066 = 64.064g
Now that we have found all the needed conversions :
1 mol O2 = 31.988g 1 mol O2 = 2 mol SO21 mol SO2 = 64.064gWe can now use dimensional analysis to calculate the answer.
Kindly check the attached image to see the table. ( sorry if its a bit blurry )
Explanation : The conversions are used to cancel out the units to get to the final unit which is gSO2.
Once the units are cancelled out except for the gSO2 we mutliply and divide based off of what the table says to do.
Here first we divide 1527 by 31.988. We than multiply by 2. Finally we multiply by 64.064 to get the final answer which is 6116gSO2
Calculate the molar mass of Na2CO3. What percentage (% comp) of Na2CO3 is composed to sodium?
Answer:
43.40%
Explanation:
Find the percent nitrogen in ammonium oxide.(Answer = 53.8%)
Answer:
6. 36.7%
Explanation: 7. 21.2% 8. 48%
2 NO(g) + O2(g) → 2 NO2(g)
How many grams of NO2 can be produced when 25.0 g of nitrogen oxide reacts?
25g/30.01g = 0.83 moles
0.83(2/2) = 0.83 moles
0.83*46.005 = 38.2 grams
Answer:
2No+O2 gives 2No2
2 moles of No gives 2 moles NO2
Moles of No= 1.20/30=0.04
Moles = 0.04 ✖ 46=1.8 moles
5.00 kg glycol, Ca(OH)2. [this is antifreezel] is added to your radiator. If your radiator contains 12.0 kg
of water, what would be the freezing point of the water-antifreeze mixture? The molal freezing point
depression constant for water is 1.86 'C.kg/mole.
The freezing point is mathematically given as
ft=-12.5C
What would be the freezing point ?Question Parameters:
5.00 kg glycol, Ca(OH)2. [this is antifreeze] is added to your radiator. If your radiator contains 12.0 kg
The molar freezing point depression constant for water is 1.86 'C.kg/mole.
Generally the equation for the Freezing point is mathematically given as
ft=k f [tex]\frac{wB}{Mb}*1000/Wa[/tex]
Therefore
0-ft=1.89*5000.62*1/12
ft=-12.5C
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How fire differ from flame?
[tex]brainlyeveryday[/tex]
Answer:
=> Fire is a rapid oxidation of any substance or material. It is a exothermic chemical process of combustion.
=> Flame is a visible, gaseous region of a fire.
which of the following substances is formed deep under earth
Answer:
Oil
Explanation:
everything else is above the earth