Answer:
100.4mL
Explanation:
Using the following formula:
C1V1 = C2V2
Where;
C1 = initial concentration (M)
C2 = final concentration (M)
V1 = initial volume (mL)
V2 = final volume (mL)
According to the information in this question,
C1 = 1.50M
V1 = ?
C2 = 9.65 M
V2 = 15.6 mL
Using C1V1 = C2V2
V1 = C2V2/C1
V1 = (9.65 × 15.6) ÷ 1.5
V1 = 150.54 ÷ 1.5
V1 = 100.36 mL
Approximately, V1 = 100.4mL
What is an example of a microorganism acting in a harmful way?
Answer:
bacteria spoiling food
hope this helps
have a good day :)
Explanation:
This is Science
How does the process of photosynthesis help the overall life on earth? (Hint: what does it produce that living things need to live?)
Answer: Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
Explanation:
What is the molarity of a solution where one mole of NaOH is added to 2000mL of water
Answer:
Molarity of a solution where one mole of NaOH is added to 2000mL of water is 0.0005
Explanation:
Molarity is the equal to number of moles of solute divided by total volume of solvent
Given -
Number of moles of solute i.e NaOH = 1
Total volume of solvent i.e water = 2000 mL
Molarity [tex]\frac{1}{2000} = 0.0005[/tex]
17) What is the molarity
of a solution with
55 grams of CaCl2
dissolved in .78 L
of water?
a. 64M
b. 1.3 M
c. 171 M
d. 91 M
The molarity of a solution with 55 grams of CaCl2 dissolved in 0.78 L is 0.64M. Details about molarity is found below.
How to calculate molarity?The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume.
However, the number of moles of a substance must first be calculated using the following expression:
no of moles = 55g ÷ 111g/mol
no of moles = 0.49mol
Molarity of CaCl2 solution = 0.49mol ÷ 0.78L
Molarity of CaCl2 solution = 0.64M
Therefore, the molarity of a solution with 55 grams of CaCl2 dissolved in 0.78 L is 0.64M.
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A gas occupies 12.3 L at a temperature of 40.0 K. What is the volume when the temperature is increased to 60.0 K?
Answer:
the volume is 18.45 L
Explanation:
The computation of the volume when the temperature is increased to 60.0 K is shown below:
Since the gas occupied 12.3 L at a temperature of 40.0 k
And, the volume when the new temperature is 60.0 k
So, the volume is
= 60.0 k × 12.3 L ÷ 40.0 k
= 18.45 L
hence, the volume is 18.45 L
2. C + S → CS2
Reaction Type:
What happens when water is added to quicklime? Write two observations.
Answer:
1.Most metal oxides are insoluble in water but some of these (e.g. Na2O.
Explanation:
2.: (i) A hissing sound is observed.
1.ii) The mixture starts boiling and lime water is obtained.
Using two ______________ of wire wrapped around an _____________ core produces an ______________ voltage and an _______________ voltage.
Answer:
Using two coils of wire wrapped around an iron core produces an input voltage and output voltage.
Explanation:
Which two radioisotopes have the same decay mode?
A)220Fr and 60C0
B)37K and 42K
C)37Ca and 53Fe
D)99Tc and 19Ne
Answer:
c
Explanation:
37Ca and 53Fe have the same decay mode.
What are the three common modes of radioactive decay?Three of the most common types of decay are alpha decay (α-decay), beta decay (β-decay), and gamma decay (γ-decay), all of which involve emitting one or more particles.
Which isotopes are most likely to decay?The most likely mode of decay for a neutron-rich nucleus is one that converts a neutron into a proton. Every neutron-rich radioactive isotope with an atomic number smaller than 83 decays by electron emission. C, 32P, and 35S, for example, are all neutron-rich nuclei that decay by the emission of an electron.
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ALEX RODE HIS BIKE
60 km in 4 Hours. How FAST WAS HE GOING
Answer:
15 km/hour
Explanation:
You need to find how fast he was going per hour.
Answer: 15
Divide. 60 ÷ 4
This gives us 15. So, Alex was going 15 mph
What is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days?
Answer: A- 1 day
Explanation: I really hope that helped. BYE!!
1 day is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days
Project: Communicating Design Details
Answer:
Do you have an idea that you want the design to be about? if you do I can help! if not I can give you ideas you can try to work with and you can tell me if theyre good or not.
Explanation:
Go to the To Scale tab at the bottom of the simulation, and select Path from the central menu on the right. Set up a Planet-Moon simulation. Use the sliders to make both the planet and the moon as massive as possible, and then begin the simulation. What do you notice about the moon’s motion when it is closest to the planet? What about when it is farthest away?
When it could be closest to the Earth and farthest from it, the Moon passes the fastest as well as the slowest.
What is Earth?The only cosmic object known to contain life is Earth, which would be located third from the Sun. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water. The oceans cover over 71% of Earth's crust, dwarfing its polar ice, lakes, including rivers.
What is moon?The sole natural satellite of Earth would be the Moon. It makes up the Earth-Moon satellite system with Earth. Its diameter is equivalent to one-fourth of Earth. It should be the biggest satellite of a planet compared to the main, bigger than any existing dwarf planet, as well as the fifth biggest satellite in the Planetary System.
When sliders to make both the planet and the moon as massive as possible, and then begin the simulation. they noticed, it could be closest to the Earth and farthest from it, the Moon passes the fastest as well as the slowest.
To know more about Earth and Moon
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A nuclide is defined as?
Answer:
Nuclide, , also called nuclear species, species of atom as characterized by the number of protons, the number of neutrons, and the energy state of the nucleus. ... The term nuclide is not synonymous with isotope, which is any member of a set of nuclides having the same atomic number but differing mass number.
Explanation:
Answer:
a distance isotope of an atom
Explanation:
Why can more water vapor (water molecules that are in the gas state of matter) be present in warm air than in cold air?
Answer:
Because warm air is less dense
Explanation:
What is the specific heat of a metal (in J/g℃) that weighs 150 g and absorbs 1.2 kJ (or 1,200 J) of heat when the temperature rises by 50.0℃?
Answer:
0.16 J/g℃
Explanation:
We have the following data:
heat = 1,200 J
mass of metal = m = 150 g
change in temperature = ΔT = 50.0℃
The heat absorbed is calculated by using the following equation:
heat = m x Cp x ΔT
So, we introduce the data in the equation to calculate the specific heat of the metal (Cp), as follows:
Cp = heat/(m x ΔT) = (1,200 J)/(150 g x 50.0℃) = 0.16 J/g℃
For the reaction of C 2H 4( g) with O 2( g), to form CO 2( g) and H 2O( g), what number of grams of CO 2 could be produced from 2.0 g of C 2H 4 and 5.0 g of O 2?
Answer:
4.58g of CO₂ could be produced
Explanation:
Based on the reaction:
C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(g)
1 mole of C₂H₄ reacts with 3 moles of oxygen to produce 2 moles of CO₂
To solve this question we must find the moles of each reactant in order to find limiting reactant. With limiting reactant we can find the moles -And the mass- of CO₂ produced:
Moles C₂H₄ -Molar mass: 28.05g/mol-
2.0g * (1mol / 28.05g) = 0.0713moles
Moles O₂ -Molar mass: 32g/mol-
5.0g * (1mol / 32g) = 0.156moles
For a complete reaction of 0.0713 moles of C2H4 are required:
0.0713 moles C₂H₄ * (3 moles O₂ / 1 mol C₂H₄) = 0.214 moles of O₂
As there are just 0.156 moles, O₂ is limiting reactant.
The moles of CO₂ produced are:
0.156 moles O₂ * (2mol CO₂ / 3mol O₂) = 0.104 moles CO₂
The mass is -Molar mass CO₂: 44.01g/mol-
0.104 moles CO₂ * (44.01g / mol) =
4.58g of CO₂ could be producedCan someone help me with this??
Answer:
A. Oil is to heavy to mix with water
HOPE THIS HELPS
-Todo <3
Explanation:
Answer:
It should be C - Water can only mix with polar molecules.
Explanation:
Oil is non-polar and water is polar.
Hydrogen gas and nitrogen gas come together to form ammonia. If 25.0 g of nitrogen is mixed with hydrogen, what volume of hydrogen is needed to complete the reaction? (grams to volume)
Answer:
60.0L of hydrogen are needed
Explanation:
Based on the reaction:
3H₂ + N₂ ⇄ 2NH₃
3 moles of hydrogen react 1 mole of nitrogen.
To solve this question we have to find the moles of nitrogen. With the moles of nitrogen we can find the moles of hydrogen. Using PV = nRT at STP conditions we can find the volume as follows:
Moles Nitrogen -Molar mass: 28g/mol-
25.0g N₂ * (1mol / 28g) = 0.893 moles N₂
Moles hydrogen:
0.893 moles N₂ * (3mol H₂ / 1mol N₂) = 2.679 moles H₂
Volume hydrogen:
PV = nRT
V = nRT / P
Where V is volume in liters,
n are moles of the gas: 2.679 moles
R is gas constant: 0.082atmL/molK
T is absolute temperature: 273.15K at STP
P is 1atm at STP
Replacing:
V = 2.679mol*0.082atmL/molK*273.15K / 1atm
V =
60.0L of hydrogen are needed
A sample of gas with a volume of 5.0 m3 at a temperature of 298 K and a pressure of 0.84 atmospheres is left in a closed container where the temperature increases to 323 K and the pressure increases to 0.89 atmospheres. What is the new volume of a gas sample?
Answer:
5.12 m³
Explanation:
Using the combined gas law formula as follows:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (m³)
V2 = final volume (m³)
T1 = initial temperature (K)
T2 = final temperature (K)
According to this question;
V1 = 5.0 m³
V2 = ?
P1 = 0.84 atm
P2 = 0.89 atm
T1 = 298 K
T2 = 323 K
Using
P1V1/T1 = P2V2/T2
0.84 × 5/298 = 0.89 × V2/323
4.2/298 = 0.89V2/323
Cross multiply
4.2 × 323 = 298 × 0.89V2
1356.6 = 265.22V2
V2 = 1356.6 ÷ 265.22
V2 = 5.12 m³
Cuales son los símbolos para representar que una reacción se produce en presencia de;
a) electricidad
b) electrolitos
Answer:
b
Explanation:
Which of the following statements is true?
Mushrooms and algae are part of the fungi group.
Fungi are a special type of plant.
Fungi can feed off both living and dead organisms.
Fungi can make their own food using photosynthesis.
Answer:
Mushroom and algae are part of the fungi group
Please answer quick!!
Which statement best explains how sexual reproduction increases variation within a species?
A. It causes the genes of two different individuals to mix.
B. It changes the base sequence of an organism's DNA.
C. It changes the trait that a given gene produces.
D. It copies one parent's genes to make each offspring.
Answer:
A
Explanation:
it causes the genes of two different individuals to mix
Answer:
Explanation:
A. It causes the genes of two different individuals to mix.
How does the CO2 level affect photosynthesis?
Answer:
Elevated [CO2] increases the availability of carbon in leaves causing greater Rubisco activity and higher rates of photosynthesis. Greater photosynthesis increases the content of non-structural carbohydrates in leaves which can lead to greater starch reserves and increased auxin biosynthesis.
Explanation:
Hope it helps
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Why does the chloride ion have a charge of -1
Explanation:
As we know that chloride ion is halogen. So it has seven valence electrons in its valence shell. Hence it gains one electron from others during chemical reaction to be stable. So Chloride ion have a negative charge of -1.
Hope it will help :)❤
What type of bond would be formed between nitrogen (N) and nitrogen (N)? Why?
an ionic bond because there is less than a 0.4 difference in electronegativity between the atoms
a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms
a nonpolar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms
Answer: The compound formed between nitrogen (N) and nitrogen (N) a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms.
Explanation:
If electronegativity difference between two atoms is less than 0.4 then bond formed is a pure covalent bond.
If electronegativity difference between two atoms is between 0.4 to 1.8 then bond formed is a polar covalent bond.
If electronegativity difference between two atoms is greater than 1.8 then bond formed is an ionic bond.
The electronegativity value of a nitrogen atom is 3.04. Hence, the electronegativity difference of [tex]N_{2}[/tex] molecule is as follows.
[tex]Electronegativity difference = electronegativity value of N - electronegativity value of N\\= 3.04 - 3.04\\= 0[/tex]As the electronegativity difference is 0 which is less than 0.4.
Hence, we can conclude that the compound formed between nitrogen (N) and nitrogen (N) a polar covalent bond because there is less than a 0.4 difference in electronegativity between the atoms.
A natural levee is _____.
A. an erosional feature that causes additional sediment to enter the river
B. a depositional elongated ridge formed by moving water that runs parallel to a stream channel
C. an elongated ridge designed by engineers that runs parallel to a stream channel
D. the result of wind erosion
Answer:
Option C, an elongated ridge designed by engineers that runs parallel to a stream channel
Explanation:
A natural or artificial levee is basically a ridge constructed along a river bank to regulate the water level in the stream.
It run along the river embankment and hence can be said that it runs parallel to the river length
Hence, option C is correct
If energy was added to solid, what state would it change to
A. Super solid
B. Plasma
C. Liquid
Answer:
Explanation:
The answer is C Liquid
kaillie was talking and was distracted as she stirred sugar into her tea. when she finally noticed, there was a few crystals of sugar in the bottom of her cup that would not dissolve. what type of tea solution did kaillie?
a. unsaturated
b. saturated
c. supersaturated
d. cannot be determined
Answer:
Supersaturated
Explanation:
The tea has absorbed and dissolved as much sugar as it could. If there is sugar left at the bottom, it means the solution is supersaturated because it can't absorb any more.
ЗKOH + H3PO4=K3PO4 + 3H2O
what is the reaction
Answer: The given reaction is a neutralization reaction.
Explanation:
When an acid chemically reacts with a base then it leads to the formation of salt and water.
For example, [tex]3KOH + H_{3}PO_{4} \rightarrow K_{3}PO_{4} + 3H_{2}O[/tex]
Here, KOH is a the base and [tex]H_{3}PO_{4}[/tex] is an acid which on chemical reaction with each other leads to the formation of salt [tex](K_{3}PO_{4})[/tex] and water [tex](H_{2}O)[/tex].
Thus, we can conclude that the given reaction is a neutralization reaction.