Answer:
139 mL
Explanation:
Given data:
Volume of solution required = ?
Molarity of solution = 0.222 M
Mass of salt = 9.57 g
Solution:
Number of moles of manganese iodide:
Number of moles = mass/molar mass
Number of moles = 9.57 g/ 308.75 g/mol
Number of moles = 0.031 mol
Volume required:
Molarity = number of moles of solute / volume in L
0.222 M = 0.031 mol / V
V = 0.031 mol / 0.222 mol/L
V = 0.139 L
Volume in mL:
0.139 L ×1000 mL / 1 L
139 mL
You need to make an aqueous solution of 0.150 M sodium fluoride for an experiment in lab, using a 500 mL volumetric flask. How much solid sodium fluoride should you add?
Answer:
Explanation:
Solution required is .15 M 500 mL sodium fluoride .
molecular weight of sodium fluoride = 42
one mole of sodium fluoride = 42 grams
No of moles contained in the solution of .15M , 500 mL solution
= .15 x 0.5 moles = .075 moles
1 mole = 42 g
.075 moles = .075 x 42 = 3.15 grams .
So mass of sodium fluoride required = 3.15 g .
During the naval battles of the South Pacific in World War II, the U.S. Navy produced smoke screens by spraying titanium tetrachloride into the moist air where it reacted according to the equation:
TiCl4 + H2O TiO2 + HCl
a. How many moles of H2O are needed to react with 6.50 moles of TiCl4? (13.0)
b. How many moles of HCl are formed when 8.44 moles of TiCl4 react? (33.8)
Explanation:
The reaction given is;
TiCl4 + H2O --> TiO2 + HCl
The reaction is not balanced, upon balancing it is given as;
TiCl4 + 2H2O → TiO2 + 4HCl
a. How many moles of H2O are needed to react with 6.50 moles of TiCl4?
From the reaction;
1 mol of TiCl4 requires 2 mol of H2O
6.50 mol of TiCl4 would require x mol of H2O
1 = 2
6.5 = x
x = 6.5 * 2 / 1 = 13.0 mol
b. How many moles of HCl are formed when 8.44 moles of TiCl4 react?
From the equation of the reaction;
1 mol of TiCl4 reacts to form 4 mol of HCl
8.44 mol of TiCl4 reacts to form x mol of HCl
1 = 4
8.44 = x
x = 8.44 * 4 / 1 = 33.76 mol
Scientists often look at how much isotopes of ______
have decayed to help estimate the age
of a fossil or once-living material.
Answer:
If im correct it’s radioisotope
Explanation:
Scientists often look at how much of isotopes of : Carbon-14 have decayed
To determine the age of fossils archeologist make use of the carbon-14 dating ( i.e. making use of naturally occurring radioisotope ¹⁴C ) which is used to determine the age of fossils or material that were once in living on earth.
Carbon has about three (3) isotopes ( Carbon-12, Carbon-13 and Carbon-14 ) .but Carbon-14 isotope is most useful in determining the age of fossils and once-living things
Hence we can conclude that scientists often look at how much of isotopes of Carbon-14 have decayed to help estimate the age of fossils.
learn more : https://brainly.com/question/1296663
4. The chemical energy in the person's body is transformed into when they peddle the bike, causing the generator to rotate. Some energy in the bike wheel is lost to . The generator produces electricity, which heats the water, causing it to produce thermal energy in the form of steam. When the person's chemical energy runs out, how do you replenish it? 5. Change the initial energy source to sun, the intermediate energy source to the solar panel, and the final energy source to the windmill. In this system, is produced from the sun and transformed into electricity in the solar panel. Both of these types of energy are considered forms of . The result of this system is that the windmill produces mechanical energy. 6. Try a few more scenarios, choosing different initial, intermediate, and final energy sources. Observe places where energy is transformed and lost. Creating systems with the least amount of energy is important in engineering design.
Answer:
Mechanical Energy, Thermal Energy, By Feeding Them Food, Light Energy, Electromagnetic Energy, it's right on Edge
Explanation:
Answer:
1. mechanical energy, 2. thermal energy, 3. by feeding them food, 4. light energy 5. electromagnetic energy
Explanation:
got it right on edg ;))
Identify the reaction type shown and describe the clues that were used to identify it.
NH4NO3 → N2O + 2H2O
Answer:
This chemical equation represents a decomposition reaction. This identification is based on the fact that the single reactant chemical compound breaks down into two different chemical substances that are different from the initial chemical substance.
Explanation:
it was the sample response lol
A reactant is broken down into two or more products in the decomposition reaction. The given reaction is a decomposition reaction.
Decomposition reaction:
In this type of chemical reaction, a reactant is broken down into two or more products.
For example- Ammonium nitrate is broken down into nitrous oxide and water molecules.
[tex]\bold {NH_4NO_3 \rightarrow N_2O + 2H_2O}[/tex]
Therefore, the given reaction is a decomposition reaction.
To know more about Decomposition reaction:
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Why would it be harder to jump on the planet Jupiter than on Earth?
HELP PLSSS
Do the following ! I'LL MARK THE BRAINLEST!
ITS SCIENCE!
Answer:
it's easier to look it up
Explanation:
Can someone help me with these three questions? please
Answer:
23 43 45 43
Explanation:
10. There are two bears that both have the same proteins for ear shape in their cells. The bears have
different parents. What can you say about the bears' ear shape?
Answer:
They will have the same ear shape since their proteins connect in the same ways to determine ear shape.
Explanation:
I majored in Chemistry
Answer:
They will have the same ear shape since their proteins connect in the same ways to determine ear shape.
Explanation:
Which one of the following is a chemical property?
A. A wood block is less dense than water
B. Gold bar is shiny
C. Bubbles form when baking soda and vinegar are mixed.
D. Water turns from liquid to gas at 1000C.
pls help thx
The forming of bubbles when baking soda and vinegar are mixed is a result of chemical property.
Chemical PropertiesChemical properties of materials are properties that are due to the chemical composition of the materials.
The formation of bubbles when baking soda is mixed with vinegar is a result of the evolution of carbon dioxide gas.
Baking soda reacts with vinegar to produce carbon dioxide and other products according to the chemical equation below:
NaHCO3 + CH3COOH → CO2 + H2O + CH3COONa
More on chemical properties can be found here: https://brainly.com/question/1728902?referrer=searchResults
How many grams are in 25.0 moles of carbon tetrachloride (CCI)?
Answer:
3.84 kg
Explanation:
CCl4 molar mass: 153.82 g/mol
n = mass / molar mass
25 moles = mass / 153.82 g/mol
mass = 25 x 153.82
mass = 3845 g or 3,84 kg
Help me plzz and thank u
Answer:
the terminator because i did this test
6.900x10^10 ÷ 4.000x10^8
Answer:
1.725e+18
Explanation:
36.0 g of Be contains how many moles?
Answer:
Explanation:
4
Base changes phenolphthalein to pink it is true or false
Answer:
It’s false
Explanation:
it could be true if the question mentioned alkaline solution
Answer:
True
Explanation:
Phenolphthalein is colorless in the presence of an acid and turns pink in the presence of a base.
would using a strainer be filtration?
Answer:
To some extent, yes
Explanation:
Write the balanced chemical equations for the following double-replacement reactions.
(Steps: skeleton equation/count number of atoms in reactants and products/balance both sides)
Q24. Aqueous lithium iodide and aqueous silver nitrate react to produce solid sikrer iodide and
1 aqueous lithium nitrate.
A24.
I need the balanced chemical equation for this question
The balanced equation :
LiI(aq) + AgNO₃(aq) --> AgI(s) + LiNO₃(aq)
Further explanationGiven
Word equation
Required
Balanced equation
Solution
There are 3 ways to express a chemical equation:
word equation skeleton equation balanced equationSkeleton equation for reaction above :
LiI(aq) + AgNO₃(aq) ⇒ AgI(s) + LiNO₃(aq)
If we look at this reaction, all the cations and anions have a charge of 1 (+1 or -1) so the balanced reaction between the skeleton equation and the balanced equation is the same
What is happening at x ?
7. Jasmine wants to prevent getting burned by accidently touching a hot metal pipe, What would be the worst
insulator for her to use to put around the pipe?
a, Glass
b. Rubber
c. Cloth
d. Wood
Answer:
A) Glass
Explanation:
Glass is a conductor, so it allows heat to go through it (Ex. Touching a pie pan that came right out of the oven)
Rubber is an insulator, so heat has a hard time passing through (Ex. Using a rubber grip on a cast iron pan.
Cloth is also an insulator, so heat has a hard time passing through (Ex. Using a pot holder to prevent the counter from getting scarred)
Wood is also an insulator, so heat has a hard time passing through (Ex. Bedding for a rabbit hutch)
Hope this helps!!
A vernier calipers are more precise than metre rule
True
False
Answer:
true
Explanation:
Vernier caliper can give exact measurements in mm.
hope it helps! please mark me brainliest
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what happend to that mass when the forest burns?
Answer:
When the forest burns we will lose a huge amount of oxygen and animals will lose their home.
Explanation:
what mass of ZnCI2 can be prepared from the reaction of 3.27 grams of zinc with 3.30 grams of HCI?
Zn + 2HCI —-> ZnCI2 + H2
Answer:
Zn. + 2 HCl ----------> ZnCl2. + H2
Explanation:
Mass of Zn in mole = 3.27/ 65.38= 0.050010.... mol
Mass of HCl in mole = 3.3/ 73= 0.044....mol
Hence, limiting reagent is HCl
Molar mass of ZnCl2= 136.38g
Let mass of ZnCl2 be x
x = 3.3*136.38÷ 73 = 6.165...
So, the mass of ZnCl2 is 6.17 g
How many grams of Fe are needed to create 32.5mol Fe3O4?
Answer:
5444.89 grams of Fe
Explanation:
1) We need the chemical equation for Fe3O4 to find the mole ratio for Fe to Fe3O4. Chemical equation:
3Fe+4H2O → Fe3O4+4H2
The mole ratio of Fe to Fe3O4 is 3:1
2) Now, we find how many grams of Fe are needed to produce 32.5 moles of Fe3O4.
[tex]32.5 moles Fe3O4[/tex][tex]x \frac{4 mole O}{1 mole Fe3O4}[/tex] = 97.5 moles Fe needed to produce 32.5 moles of Fe3O4
3) Convert 97.5 moles of Fe into grams. The molar mass of Fe is 55.845g.
[tex]97.5 mole Fe[/tex][tex]x\frac{55.845g Fe}{1 mole Fe}[/tex] = 5444.8875g or 5444.89g.
1
a)Put the metals used (magnesium, copper, iron, zinc)
in order from the least reactive to the most reactive.
The more reactive metal will displace the other metal
from the solution of its metal salt.
Answer:
Magnesium
Zinc
Iron
Copper
Explanation:
The given elements are:
Magnesium, copper, iron and zinc
We are to put them in the order from the least reactive to the most reactive of all.
To solve this problem, we simply use the activity series of metals to arrange the elements.
The activity series arranges metals from the most reactive to the least reactive. The more reactive metals displaces the lesser one from solutions.
So;
Magnesium
Zinc
Iron
Copper
Predictions about the future based on the position of planets is an example of physics biology earth science pseudoscience
Answer:
Pseudoscience
Explanation:
Predicting the future based solely on the position of the planets is an example of pseudoscience.
Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.
Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.
Any other statement or belief that is not based on these procedures is said to be pseudoscientific.
Answer:
The answer to your question is pseudoscience.
Explanation:
I took the module 1 exam and got it right, yesterday.
Physical and chemical properties are used to describe and identify matter. Physical properties can be observed without changing the identity of the substance. Chemical properties can be observed by attempting to change the identity of a substance. What are two physical and chemical properties that you can use to help you identify a substance?
Extensive properties, such as mass and volume, depend on the amount of matter that is being measured. ... Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity
What is the temperature change that 725 g of aluminum will undergo when 2.35 x 104
J of thermal energy are added to it?
Answer:
36°C
Explanation:
Given parameters:
Mass of aluminum = 725g
Quantity of heat = 2.35 x 10⁴J
Unknown:
Temperature change = ?
Solution:
To solve this problem, we simply use the expression below:
The quantity of energy is given as:
Q = m C Δt
Q is the quantity of energy
m is the mass
C is the specific heat capacity of aluminum = 0.9J/g°C
Δt is the change in temperature
The unknown is Δt;
Δt = [tex]\frac{Q}{mc}[/tex] = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex] = 36°C
Which statement best describes the relationship between photosynthesis and cellular respiration?
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Photosynthesis is part of the carbon cycle, and cellular respiration is not.
Only plants perform photosynthesis, and only animals perform cellular respiration.
Photosynthesis releases carbon into the atmosphere, and cellular respiration removes carbon from the atmosphere.
Answer:
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
Explanation:
The first option clearly expresses the relationship between photosynthesis and cellular respiration.
Cellular respiration releases carbon back into the atmosphere whereas photosynthesis removes the carbon from the atmosphere.
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water.
In cellular respiration, the product of the photosynthesis is used by organisms to produce energy.
HELP LIKE HELP HURRY I HAVE 2 hours. To finish
Answer: hello, the answer would be rotates, revolves
hope this helps :)
Explanation:
When a compound such as X2Z4 is created, what would be the
correct simplified chemical formula?
Answer:
XZ2
Explanation:
There are different ways in which compounds can be represented. Broadly, we have three different types of formula;
- Structural formular: This shows how th atoms in te compound are connected to each other.
- Molecular formular: This shows the actual number of atoms of element present in the compound
- Empirical Formular: This is the simplest formular of a compound. It basically shows the number of atoms in simple ration to each other.
This question requires us to input the empirical formular;
X2Z4
The ratio of the elements is; 2 : 4 which can be simplified into 1 : 2
This means the empirical formular is XZ2
