Answer:
See Explanation
Explanation:
When a salt is dissolved in water, the solution could be acidic, basic or neutral depending on the nature of acid and base from which the salt was formed.
When a salt is formed from a strong acid and a weak base, the salt solution is acidic.
For instance, NH4Cl is a salt formed from NH3 which is a weak base and HCl which is a strong acid. The salt hydrolyses as follows;
NH4^+(aq) + H2O(l) ------> H3O^+(aq) + NH3(aq)
Hence an acidic solution is formed.
Which type of pressure system is located near Seattle? *
Answer:
Seattle is shielded from extreme weather by the Cascade and Olympic mountain regions to the east and west, respectively. Low pressure systems tend to come from the south while high pressure systems tend to come from the north.
You have 1684.6 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of solvent are in the solution?
Answer:
1623.62
Explanation:
The first step is to calculate the mass of sodium hypochlorite
1684.6× 3.62/100
1684.6× 0.0362
60.98252
Therefore the mass of the solvent can be calculated as follows
1684.6-60.98252
1623.62
18.) CCC Energy and Matter Photovoltaic power from solar panels and biomass
energy are obviously forms of solar energy, coming from sunlight. Explain why
both wind power and hydroelectric power can also be considered to be forms of
solar energy.
Answer:
See Explanation
Explanation:
Renewable energy sources refers to those energy sources that can never be depleted. This means that they can be used severally without getting exhausted. Solar, biomass, wind and hydroelectric power are all renewable energy sources.
Hence, from the perspective described above, we can say that wind is a form of solar energy because wind is formed when the air is heated by the sun.
Hydroelectric power is driven by the water cycle. This water cycle somehow depends on the sun to run efficiently. So, hydroelectric power can also be considered to be a form of solar energy.
Brief report on the carbon cycle
Answer:
Explanation:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
Name the following ketone:
The correct answer is
1,4-dichloro-2-pentanone
The name of the given molecule will be "1,4-dichloro-2-pentanone".
What is molecule?A molecule represents the tiniest unit of a material that keeps its content and properties. It must be made up of two or more atoms that have been joined together by chemical bonds.
What is 1,4-dichloro-2-pentanone?This molecule will be made by carbon, oxygen , hydrogen and oxygen molecule.
It can be seen that given molecule has 5 carbon atom in which 1 and 4 position of carbon atom chlorine atom is present and at 2 carbon oxygen atom is presence. that's why the name of the given molecule will be "1,4-dichloro-2-pentanone".
In this molecule one ketone and two halogen (Cl) groups are present that's why it can be consider as keto halogen compound.
The molecular formula of this compound can be written as [tex]C_{5} H_{10} Cl_{2} O[/tex]. Presence of oxygen molecule indicate that keto group should be present in the given molecule . So the name of the compound should be 1,4-dichloro-2-pentanone
Therefore, the correct answer will be option (C).
To know more about molecule
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How many moles of CO2 are there in 2.55E18 molecules of CO2?
Answer: 1.535e42 (or 1.535x10^42) moles of CO2
Explanation: i know this is six days late, but all you have to do for this one is multiply 2.55e18 by the standard mole value, 6.02e23 and your calculator will give you 1.535e42 moles!
You have been hired by Acme Fireworks to create a new line of fireworks. You need a 2.5M solution of HCl to make your prototype. To what volume must 250.0 mL of 6.2M HCl be diluted in order to obtain a 2.5M solution?
A. 260ml
B. 620ml
C. 370ml
D. 990ml
Answer:7283
Explanation:
$34748
DUE IN 15 MINS! I just wanna clarify
Answer:
well im sorry to say this but good luck >:}
Explanation:
You have a mixture that contains 0.380 moles of Ne(g), 0.250 moles of He(g), and 0.500 moles CH4(g) at 400 K and 6.25 atm. What is the partial pressure of He?
Answer:
1.38 atm
Explanation:
Partial pressure of a gas = total pressure × mole fraction of that gas.
Mole fraction of a gas is moles of a gas ÷ total moles of all gases.
The partial pressure of Helium gas is 2.756 atm. This can be calculated by using mol fraction first.
Calculation of mol fraction:
It is the ratio of one mole of gas to the total moles of all the gases.
Total moles of all gases = 0.380+0.250+0.500 =1.13
Mol fraction of Helium gas = 0.500/1.13
Mol fraction of Helium gas = 0.442
Calculation of partial pressure:It is the product of mol fraction of the gas to the total pressure given.
Partial pressure= 0.442 * 6.52 atm
Partial pressure=2.765 atm
Find more information about Mol fraction here:
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If there are 3 cats but they each die of different diseases one of heart fail, second of Brian tumor and 3rd of experiment gone wrong, which how many cats are left.
Answer:
none
Explanation:
It is given that there are 3 cats.
Each of the cats die with different diseases. One of cats died due to heart failure, the second cats died because of brain tumor and the third cat died due to an experiment gone wrong.
So there are none of the cats left out. All the cats died due to different reasons.
A student added 3 gms one substance in a beaker and then added 4 gms of another substance. A chemical reaction took place in the uncovered beaker, after the reaction the beaker weighed 5 gms which of the following is the best explanation?
A Some of the mass of the reactants was lost as heat and evaporated into the air.
B. The reaction produce a gas as a product.
C. Some of the reactantants were destroyed as when the chemicals were added.
Answer:
B. The reaction produce a gas as a product.
Explanation:
According to the law of conservation of mass, the total mass of reactants must be equal to the total mass of products because mass is neither created nor destroyed in a chemical reaction.
The total mass of the reactants is 7 grams. The total mass of the products and the beaker is 5 grams. This means that the mass of products is less than the mass of reactants.
The only plausible explanation for this is that the reaction produced a gaseous product which escaped because the system is an open system thereby leading to a lesser measured mass of products since mass can not be created nor destroyed.
GUYS, PLEASE HELP ME I'M ON THE LAST QUESTION AND I GET IT WRONG I HAVE TO START OVER. no links
Answer:
its actually experimental this time
Explanation:
sorry bout the last one i just wanna help:(
80
Juan serves a tennis ball
. He throws the tennis ball into the air and hits it with his racket when it reaches its
highest point Once he hits the ball
, it moves forward and downward, eventually hitting the ground after it goes
over the net
. At which point is kinetic energy converted to gravitational potential energy
?
A just before Juan throws the bal
B just after Juan throws the ball into the air
Cust after juan hits the tennis ball
D just before the tennis ball hits the ground
Answer:
b
Explanation:
he throws the ball into the air
Name a substance which will undergo changes from solid to liquid to gas between 0c and 100c
Answer:
WATER
Explanation:
Water melting point 0 c boiling 100c
why are the elements take part in bonding
Answer:
Atoms form chemical bonds to make their outer electron shells more stable. The type of chemical bond maximizes the stability of the atoms that form it. ... Covalent bonds form when sharing atoms results in the highest stability. Other types of bonds besides ionic and covalent chemical bonds exist, too.
How long would it take a train to travel 500 miles at 25 mph?
Answer:
2 or 3 hrs
I think
HOPE IT HELPEDAs you move down and to the left on the periodic table metals become a
1 Which process causes the greatest increase in the distance between particles?
A condensation
B freezing
C melting
D sublimation
The Answer is compensation
6.
What are the mass numbers of; hydrogen, helium
and boron? I
승
multiple choice question!
Answer:
butyne
Explanation:
Suffix -yne indicates presence of triple bond and prefix but- means 4 carbons atoms.
when equilibrium has been established explain in terms of reaction rates why the concentration of reactants and products remains the same.
Answer:
The concentration of reactants and products is the same because there is no forward reaction and backward reaction taking place since the equilibrium position is in the mid.
If sufficient acid is used to react completely
with 21.0 grams of Mg
Mg(s) + 2 HCl(aq) + MgCl2(aq) + H2(g)
what volume of hydrogen at STP would be
produced?
1. 9.68 liters
2. 10.60 liters
3. 4.84 liters
4. 19.37 liters
5. 22.40 liters
Solution,
Mass of Mg - 21gm
molar mass of Mg - 24gm
moles = Given mass/ Molar mass
moles = 21/24 = 0.875
1 mole of Mg produce 1 mole of H2 gas
so 0.875 mole of Mg will produce 0.875 moles of H2 gas
One mole of H2 gas = 22.4 litre
0.875 mole of H2 gas = 0.875×22.4
0.875 mole of H2 gas = 19.60 litre
So the nearest ANSWER is Option four 19.37 litre.
STP is the standard temperature and the pressure of the gases of the system. The volume of the hydrogen that will be produced as STP is 19.37 litres.
What is volume?Volume is the amount of the substance or the solution occupied in an area or object and is estimated in L or mL. It is a scalar quantity.
Given,
Mass of magnesium = 21 gm
Molar mass of magnesium = 24 gm/mol
Moles of magnesium can be calculated as,
[tex]\begin{aligned}\rm moles &= \rm \dfrac{mass}{molar\;mass}\\\\&= \dfrac{21}{24}\\\\&= 0.875 \;\rm mol\end{aligned}[/tex]
If 1-mole magnesium = 1-mole hydrogen gas
Then 0.875-mole magnesium = 0.875 moles of hydrogen gas
If 1 mole of hydrogen gas = 22.4 L
Then, 0.875 moles of hydrogen gas = x L
Solving for x:
[tex]\begin{aligned}\rm x &= 0.875 \times 22.4\\\\&= 19.60 \;\rm litre\end {aligned}[/tex]
Therefore, the volume of hydrogen at STP would be option 4. 19.37 litres.
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Mg + 2HCl → MgCl2 + H2
How many grams of hydrochloric acid (HCI) is needed to produce 200g of H2?
Answer:
7242.1g
Explanation:
The balanced equation for this reaction is as follows:
Mg + 2HCl → MgCl2 + H2
From the above equation, it can be observed that 2 moles of HCl is needed to produce 1 mole of H2.
Using the formula below, we convert the mass of H2 to moles;
Molar mass of H2 = 2.016g/mol
mole = 200/2.016
mole = 99.21mol of H2
Since 2 moles of HCl is needed to produce 1 mole of H2.
Then 99.21 moles of H2 will be produced by 99.21 × 2 = 198.4mol of HCl
Molar mass of HCl = 1 + 35.5
= 36.5g/mol
Mole = mass/molar mass
Mass = molar mass × mole
Mass = 36.5 × 198.4
Mass = 7242.1g
Given the information in the velocity vs. time graph,
what is the displacement of the object after 1 second?
After 3 seconds?
After 5 seconds?
aniapsmxuansyxineydo
PLS HURRY!!!
Suppose that decades of overfishing in the Atlantic Ocean have led to a large decrease in the Atlantic cod population. As a result, there has been a steady decrease in the number of other predator species in the ecosystem. All of the populations in this marine ecosystem are now in danger of decline because of this imbalance.
Which of the following solutions would best help preserve the biodiversity of this ecosystem?
A.
introducing non-native fish species that can repopulate the ecosystem if the native populations continue to decline
B.
only allowing commercial fishing companies to fish for predator fish in this ecosystem for the next several decades
C.
implementing and enforcing laws that limit the number of fish that can be caught annually in this ecosystem
D.
only allowing commercial fishing companies to fish during the species' spawning season when the fish are laying their eggs
Answer:
A
Explanation:
I think it is C because if you read B, c or D you would probably think those would not help the biodiversity of the ecosystem.
Answer:
It's c
Explanation:
C.implementing and enforcing laws that limit the number of fish that can be caught annually in this ecosystem
I just did it soo..
This diagram illustrates the life cycle of a tomato plant. Which stage in this plant life cycle is the adult? Tomato Plant Life Cycle
Answer:
the answer is A
Explanation:
hope it hlp
What part of the US government continued to study cold fusion after others gave up on it?
A.) the Army
B.) the Navy
C) the Coast Guard
D.) the Marines.
MARKING BRAINLIEST Think about the fact that water is most dense at 4°C, and the fact that ice is much less dense than
water.
a. What would happen to a lake or a pond in the winter (in a cold climate) if this wasn’t the
case?
b. What if the water continued to contract, and the solid form (ice) was more dense than liquid
water?
c. How would this affect the life in the lake
please answer all
Answer:
See Explanation
Explanation:
a) If water is not most dense at 4°C, then the entire lake or pond will simply freeze bottom-up during winter thereby leading to the death of all the aquatic organisms inside the pond.
b) If the solid ice was more dense than water then it will sink inside the water thereby making room for the water to continue to freeze until all the water in the lake or pond will be converted to ice.
c) If the scenario described in (a) and (b) above occurs, the lake will simply cease to exist because all the living organisms in it will die and begin to decay after the ice has melted after the winter season thereby leading to a complete loss of the lake or pond.
Answer:
mark them brainyist
Explanation:
How many atoms are in 0.500mol of calcium?
Answer:
3.01×10²³ atoms of calcium
Explanation:
number of moles = number of atoms/Avogadro's constant
n = N/NA
N = n×NA = 0.500 mol×6.02×10²³ mol^-1
N = 3.01×10²³ atoms of calcium
(PLEASE HELP) 500 mL of a gas is collected at 745 mmHg. What will the volume be at 1.8 atm?
Answer:
272.22 mLExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the new volume we have
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
First convert 745 mmHg to atm
760 mmHg = 1 atm
745 mmHg = 745/760 = 0.98 atm
We have
[tex]V_2 = \frac{500 \times 0.98}{1.8} \\ = 272.222...[/tex]
We have the final answer as
272.22 mLHope this helps you