Answer:
b) 2
Explanation:
The Wurtz reaction is a reaction in which the hydrocarbon chain in lengthened by reaction two alkyl halides with sodium. The reaction is carried out in dry ether.
When methyl iodide reacts with ethyl iodide, two products are formed; the hydrocarbon product and sodium iodide.
Na/Ether
CH3CH2I + CH3I ----------> CH3CH2CH3 + 2NaI
solution. Identify the concentration of the nye
10. Determine the volume/volume percent solution made by combining 25 ml of ethanol with enough water to
produce 200 mL of the solution.
Answer:
12.5%
Explanation:
Given data:
Volume/Volume % = ?
Volume of solute = 25 mL
Volume of solution = 200 mL
Solution:
Formula:
v/v% = ( volume of solute / volume of solution ) × 100
by putting values,
v/v% = ( 25 mL / 200 mL) × 100
v/v% = 0.125 × 100
v/v% = 12.5%
Scientists did not know about cells before the 1600s because the
microscope had not been invented yet. *
O True
False
Which of the following plant structures provides most of the water necessary for photosynthesis?
а. roots
b. leaves
chloroplasts
d. stomata
Answer:
Explanation:
a:)
The plant structure that provides most of the water necessary for photosynthesis is the leaves. The correct option is b.
What is photosynthesis?Through a process known as photosynthesis, green plants and some other animals transform light energy into chemical energy. The main, readily available, non-recyclable component of photosynthesis is sunlight.
Plants use their roots to draw water from the soil. Water is necessary for photosynthesis, which primarily takes place in a plant's leaves, as you probably already know.
Chloroplasts, which are found in the mesophyll of the leaves, are where photosynthesis occurs. The chlorophyll in the thylakoids, which are located inside the chloroplast, absorbs the various colors of light to produce energy.
Therefore, the correct option is b. leaves.
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Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to be more acidic in aqueous solution than , e.g. have a larger .
The question is incomplete, the complete question is;
Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to be more acidic in aqueous solution than H2S , e.g. have a larger Ka.
Answer:
H2Se
Explanation:
The acidity and extent of acid dissociation (shown by Ka value) depends on the nature of the bond between hydrogen and the group 6A element.
If we compare the H-S bond and the H-Se bond, we will discover that the H-Se bond is longer, weaker and breaks more easily than the H-S bond. As a result of this, H2Se is more acidic than H2S.
What is The Magnus Effect/Force? Explain.
Answer:
dk
Explanation:
Why is an ice cube less dense than liquid water?
O A. Molecules in ice have less space between them than molecules in liquid water
O B. Molecules in ice are more spread out than molecules in liquid water.
O C. Ice molecules have less mass than water molecules.
O D. Ice molecules have more mass than water molecules.
Anwser is B. Just got correct.
Answer:
B hope this helps
Explanation:
The density of a substance describes how closely its molecules are packed. Despite the fact that ice is a solid form, an ice cube contains many pores in and the molecules are more spread in the state than that in liquid state of water.
What is density?Density of a substance is the measure of its mass per unit volume. It describes how closely packed its molecules within a given volume. If the molecules have enough space to spread they will be less dense.
The objects which are less dense than water will float in it. Whereas which are having more density will sink on it. Ice floats on water because, ice is less dense than water.
An ice cube has a pore structure and one ice cube contains fewer water molecules and which are spread through the porous structure. Therefore, water in liquid state is more dense than ice.
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Which statement best describes the availability of nonrenewable energy resources?
O Their supplies will be completely used up within ten years.
O They are readily available in all countries.
O Their exact amounts are not currently known.
They are stored in primary forests around the world.
Answer:
C. Their exact amounts are not currently known.
Explanation:
The statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.
What are non-renewable sources of energy?Non-renewable sources of energy are those sources that are subject to exhaustion from usage i.e. cannot replenish itself.
Non-renewable sources unlike their renewable counterparts are exhaustible because they don't replenish themselves over a short time.
Examples of non-renewable sources of energy are:
PetroleumcoalTherefore, the statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.
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What is temperature equilibrium?
A. When particles of matter have reached an equal
temperature
B. The flow of energy from one particle to another
C. When particles of matter are moving in the exact same
manner
Answer: A
Explanation: equilibrium is where all the paricles are at the
Which element is this?
50P
69N
N
18 18
4
This should bring you to the periodic table Can i Please have Brainliest
6. How many ions of Na are in 45.6 g of Na2SO4?
Answer:
3.85 ×10²³ Na⁺ ions
Explanation:
Given data:
Mass of Na₂SO₄ = 45.6 g
Number of ions of Na = ?
Solution:
Number of moles of Na₂SO₄:
Number of moles = mass/ molar mass
Number of moles = 45.6 g/ 142.04 g/mol
Number of moles = 0.32 mol
1 mole of Na₂SO₄ contain 2 moles of Na⁺ ion.
0.32 mol × 2= 0.64 moles of Na⁺ ion
1 mole contain 6.022×10²³ Na⁺ ions
0.64 mol × 6.022×10²³ Na⁺ ions / 1 mol
3.85 ×10²³ Na⁺ ions
Denmark is characterized as temperature as a region . the winters typicky experience frequent snowfall and low temperatures. in contrast, the summers are typically mild. is the sentence talking about climate, whether, topography or atmosphere
PLZ HELP WILL GIVE 40 POINTS PLEASE
Answer:
A?
Explanation:
when aqueous solutions of sodium hypochlorite and nitric acid are mixed, an aqueous solution of sodium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction.
Answer:
H+ (aq) + ClO- (aq) ---> HClO(aq)
Explanation:
The net ionic reaction equation is a chemical equation that explicitly shows only the particular ions that undergo a chemical change in the course of a given reaction.
In this particular reaction, the molecular reaction equation is shown as follows;
HNO3(aq) + NaOCl(aq) -----------> NaNO3(aq) + HOCl(aq)
Ionically;
H+ (aq) + ClO- (aq) ---> HClO(aq)
A student working in the laboratory produces 6.81 grams of calcium oxide, CaO, from 20.7 grams of calcium
carbonate, CaCO3, according to the reaction CaCO3 → CaO + CO2. Calculate the theoretical yield and
the percent yield for the reaction. Show and/or explain your work.
Answer:
Percent yield = 57.8 %
Theoretical yield = 11.781 g
Explanation:
Given data:
Mass of CaO produced = 6.81 g
Mass of CaCO₃ react = 20.7 g
Theoretical yield = ?
Percent yield = ?
Solution:
Chemical equation:
CaCO₃ → CaO + CO₂
Number of moles of CaCO₃ :
Number of moles = mass/molar mass
Number of moles = 20.7 g/ 100.1 g/mol
Number of moles = 0.21 mol
Now we will compare the moles of CaCO₃ with CaO.
CaCO₃ : CaO
1 : 1
0.21 : 0.21
Theoretical yield of CaO:
Mass = number of moles × molar mass
Mass = 0.21 mol × 56.1 g/mol
Mass = 11.781 g
Percent yield:
Percent yield = ( actual yield / theoretical yield ) × 100
Percent yield = (6.81 g/ 11.781 g) × 100
Percent yield = 57.8 %
Acetylene gas, C2H2, reacts with oxygen according to the following equation. If 52.0 g of acetylene react completely with sufficient oxygen, how many grams of carbon dioxide are produced
Answer:
176 g of CO₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2C₂H₂ + 5O₂ —> 4CO₂ + 2H₂O
Next, we shall determine the mass of C₂H₂ that reacted and the mass of CO₂ produced from the balanced equation.
This is illustrated below:
Molar mass of C₂H₂ = (2×12) + (2×1)
= 24 + 2 = 26 g/mol
Mass of C₂H₂ from the balanced equation = 2 × 26 = 52 g
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32 = 44 g/mol
Mass of CO₂ from the balanced equation = 4 × 44 = 176 g
From the calculations made above,
52 g of C₂H₂ reacted to produce 176 g of CO₂.
4. Which of the following parts should Joseph adjust to change the objective lens from
scanner to HPO?
a. Inclination Joint
c. Stage
b. Revolving Nosepiece
d. Body Tube
Answer:
D. Body Tube
A hallow tube attached to the arm, that connects the eyepiece to the(OBJECTIVES) there are types of objectives and those are "Scanner , LPO , HPO , and OIO" and Body tube also assures continuos alignment of the optics :) I hope this helped you
Which factor is a biotic factor of an ecosystem?
Answer:
what are your choices
Explanation:
because I can help you
Answer: the bacteria that live in the intestine of a rabbit
Explanation:
thats the answer if ur quiz/test is same as mine
what is the frequency,in Hz,of electromagnetic radiation that has a wavelength of 1.25m
Answer:
[tex]f=2x10^8Hz[/tex]
Explanation:
Hello!
In this case, given that frequency of the electromagnetic radiation showing off a wavelength of 1.25 m is computed by using the speed of light as shown below:
[tex]f=\frac{c}{\lambda }[/tex]
We plug in the wavelength and speed of light to obtain:
[tex]f=\frac{3x10^8m/s}{1.25m } \\\\f=2x10^8Hz[/tex]
Best regards!
The frequency will be "[tex]2\times 10^8 \ Hz[/tex]".
Electromagnetic radiation:Radiation which thus travels throughout waves as well as which has both electromagnetic energy.
The power of electromagnetic radiation could range from minimum to maximum. Radio waves, radiation, x-rays, and gamma radiation are all examples of electromagnetic radiation.
Given value:
Wavelength, [tex]\lambda = 1.25 \ m[/tex]
Speed of light, [tex]c = 3\times 10^8[/tex] m/s
The frequency be:
→ [tex]f = \frac{c}{v}[/tex]
By putting the values,
[tex]= \frac{3\times 10^8}{1.25}[/tex]
[tex]= 2\times 10^8[/tex] Hz
Thus the above response is right.
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Two Balloons one filled with hydrogen gas and second filled with neon gas. what gas should be used in an experiement to identify the element in each balloon?
Answer:
Oxygen
Explanation:
If two balloons are filled with hydrogen gas and helium gas respectively, then we want to identify what gas is in each balloon, we have to do so by exposing the both balloons to flame in an oxygen atmosphere.
Hydrogen combines with oxygen in the presence of a flame with quite a loud sound and the flame is sustained but when a flame is brought near helium gas in a balloon, the gas will only make a little sound when exposed to the flame and extinguish the flame.
The reason for the explosion of the gas in the hydrogen balloon is that combustion of hydrogen gas is exothermic. The heating up of surrounding air molecules leads to a sudden explosion.
However, the helium balloon makes a little sound when the balloon is ruptured releasing helium gas which extinguishes the flame.
how many atoms are there in 0.075 mol of titanium
Answer:
There are 6.022x10^23
Explanation:
plzz put me as brainest
what would be a logical explanation for why carbon dioxide increased over the time shown in the graph.
A. the area of land for crops incresed
b. the amount of plants eaten by animal increased
c. the amount of fossil fuels being burned increased
d. the amount of wood being burned by pepole increased
Answer:
c. the amount of fossil fuels being burned increased
Explanation:
Carbon dioxide gas concentration increased over the time due to burning of fossil fuels increased. Fossil fuels are organic compounds which releases carbondioxide gas as a result of burning of fossil fuels in the engines of vehicles and industries. With the passage of time, number of vehicles increases in the world which needs more fossil fuels and due to burning of that fossil fuels, more carbondioxide gas is released.
the molar heat capacity of ice is 37 and the molar heat capacituy of liqyid water is 76. what can be concluded about the relatice magnitudes fo the heat of fusion of ice at 263 k
Answer:
ΔH 263 < ΔH 273
Explanation:
From the given information
According to Kirchoff law:
[tex]\Delta H_2 = \Delta \ H_1 + \Delta \ (c_p) ( \Delta T)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + (76-37) \times ( 273 - 263)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + (39) \times (10)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + 390[/tex]
Thus, [tex]\Delta H_2[/tex] at 273 is greater than [tex]\Delta \ H_1[/tex] at 263
∴
ΔH 263 < ΔH 273
define blood circulation brefly
Answer:
blood circulation The circulation of blood refers to its continual flow from the heart, through branching arteries, to reach and traverse the microscopic vessels in all parts of the body, reconverging in the veins and returning to the heart, to flow thence through the lungs and back to the heart to start the circuit.
That is the answer. Your welcome
What technology allowed scientists to collect new data on layers of the earth
Which of the following converts mechanical energy to electrical energy?
O A. An electric generator
O B. A loudspeaker
O C. An electromagnet
O D. An electric motor
Answer:
an electrical generator
What is the difference between electric current and static electricity?
Answer:
In static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.
Answer: Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons.
Explanation:
hopes this helps
Question 1 of 10
Where is a tomado most likely to form?
O A. Where warm, moist air masses traveling north collide with cool,
dry air masses traveling south
O B. On the northwestern side of a low-pressure system
C. Where a high-pressure system is lingering over an area
OD Over warm, tropical ocean water
SUBMIT
Answer:
A Where warm, moist air masses traveling north collide with cool,
dry air masses traveling south
Which of these is a harmful interaction
Answer:The five major types of species interactions, summarized in Figure 10, are competition, predation, parasitism, mutualism, and commensalism.
Explanation:
how much mass is lost through radioactive decay if 1.8 x 10^15 J are released?
Answer:
0.02 kg
Explanation:
A P E X
The energy released by the decay process is 1.8 x 10¹⁵ J. Therefore the mass of the radioactive substance is 0.02 Kg.
What is radioactive decay ?Heavy unstable radioactive nuclei undergoes nuclear decay by the emission of charged particles to form more stable nuclei.
The relationship between energy and mass is given by Einstein's famous equation, E = mc², where E is the energy released in a process, m is the mass lost or gained in the process, and c is the speed of light.
To calculate the mass lost through radioactive decay, we need to rearrange this equation to solve for m:
m = E / c²
Plugging in the given energy released, E = 1.8 x 10^15 J, and the speed of light, c = 3 × 10⁸m/s, we get:
m = (1.8 x 10¹⁵ J) / ( 3 × 10⁸ m/s)²
m = 1.8 x 10¹⁵ J /9 x 10^16 m²/s²
m =0.02 kg
Therefore, the mass lost through radioactive decay is approximately 0.02 kg.
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Li2SO4 _____ an electrolyte in solution.
A. Is
B. Is not
Answer:
a
Explanation:
it is an electrolyte because of its strong polar chemical bond
