Answer:
whats is it?
Explanation:
Answer: A. Plant Like
Explanation:
They can obtain energy from photosynthesis through the sun.
If I have 17 liters of gas at a temperature of 67°C and a pressure of 88.89 atm, what will be pressure of the gas if I raise the temperature to 367K and decrease the volume to 12 Liters?
Answer:
xiu I nnn ivy u
Explanation:
shin deer high ed residency by uh uh to
Balance the following chemical reaction:
NaF +
Br₂
NaBr +
F2
O A. 3,1,2,1
OB. 1,2,3,4
OC. 2,1,2,1
O D. 1,2,1,2
Answer:
what the freak is thisnenejehey
Element 2 is:
A) Cobalt
B)Chlorine
C)Calcium
D)Carbon
Answer:
D: Carbon
Explanation:
Carbon is the sixth element with a total of 6 electrons in the periodic table. Hence the atomic number Z = 6. The ground state electron configuration of carbon is 1s2 2s2 2p2. An excited state electron configuration of carbon is 1s2 2s1 2p3.
3. How many moles of NaCl are present in 6000. La 1.5 M NaCl solution?
A.9.0
B.9.0 x 10^3 moles
C.4.0 x 10^8 moles
Answer:
Option A (9.0) is the correct alternative.
Explanation:
The given values are:
Molarity,
= 1.5 M
Volume,
= 6000 mL
or,
= 6 L
As we know,
⇒ [tex]Molarity=\frac{Moles}{Volume}[/tex]
or,
⇒ [tex]The \ moles \ of \ NaCl=Molarity\times Volume[/tex]
By putting the values, we get
[tex]=1.5\times 6[/tex]
[tex]=9 \ mol[/tex]
H2 + O2 + H2O how do I balance this?
Explanation:
[tex]2H _{2(g)} + O _{2(g)}→2H _{2}O _{(l)}[/tex]
Insert 2 on Hydrogen then a 2 on water molecule.
To make a solution for an experiment, Gunther needs to add 40 g of a solute to 100 g of water. When making the solution at room temperature, he could only add 34 grams before the solute settled out.
What could he do to dissolve the remaining 6 grams of the solute?
Put the solution in an ice bath, dissolve the solute, and let the solution return to room temperature.
Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
Add more water, boil the solution, and dissolve the solute until the some of the water evaporates.
Keep the solution at room temperature, add more water, and dissolve the excess solute.
Answer:
B. Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
Explanation:
What Gunther should do is to heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
A solution is composed of a solute and a solvent. The solubility of a solute in a solvent depends on temperature. Especially for solids, solubility increased when the temperature is increased.
Now, from the question, Gunther needs to add 40 g of a solute to 100 g of water. He added 34 grams before the solute settled out. In this case, he needed to dissolve the remaining 6 grams. What Gunther should do is to to heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
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How does the melting of ice caps near the North Pole affect the salinity of the ocean?
Salinity decreases because freshwater flows into the ocean
Salinity increases because of the stored pockets of air and salt
Salinity increases because salt from the ice caps flows into the ocean
There is no change in the ocean’s salinity with this process
Answer:
A.
Explanation:
melting of ice will increase water in oceans due to which water in oceans will increase and salinity will decrease. hence, melting of ice caps near the north pole affects salinity of the ocean
La valencia que utiliza el hidrógeno al formar un hidruro metálico es
Answer: Esta tendencia es tan regular que el poder de combinación, o valencia, de un elemento se definió una vez como el número de átomos de hidrógeno unidos al elemento en su hidruro. El hidrógeno es el único elemento que forma compuestos en los que los electrones de valencia están en la capa n = 1.
Explanation:
¡Espero que esto ayude!
I NEED THIS ASAP Someone please help me
Read the chemical equation. 2NaOH + H2SO4 → Na2SO4 + 2H2O Which of the following statements would be correct if four moles of NaOH were used in this reaction?
A. Two moles of water were produced from this reaction.
B. Four moles of water were produced from this reaction.
C. One mole of H2SO4 was used in this reaction.
D. Eight moles of H2SO4 were used in this reaction.
Answer:
the answer is B
Explanation:
Answer: B!
Explanation:
B. Four moles of water were produced from this reaction.
got it right on the test :-)
I'm timed! Select the STEM-related activities performed in the fashion industry.
garment weaving
market analysis
pattern making
fabric dyeing
product promotion
product advertising
Answer:
All of them I think
Explanation:
STEM is science, technology, engineering and math, and all of them use that in some aspect
. Cat added a sample of sodium hydroxide to water and determined the pH to be 12. What is the pOH of the solution?
pOH =
Answer:2
Explanation:
To find the pOH of a solution, we can use the relationship between pH and pOH: pH + pOH = 14
What is pOH?pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. It is the negative logarithm (base 10) of the hydroxide ion concentration. The pOH scale is the reverse of the pH scale, which measures the concentration of hydrogen ions (H+) in a solution. While pH indicates the acidity of a solution, pOH indicates the basicity.
Given that the pH of the solution is 12, we can substitute this value into the equation:
12 + pOH = 14
To isolate pOH, we can subtract 12 from both sides of the equation:
pOH = 14 - 12
Simplifying the equation, we get:
pOH = 2
Therefore, the pOH of the solution is 2.
Understanding the pH and pOH values helps in determining the acidic or basic nature of a solution, which is important in various fields such as chemistry, biology, and environmental science.
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Identify whether each compound is a straight chain, branched chain, or cycloalkane,
Answer:
First Part: branched chain, cycloalkane, straight chain
Second Part: straight chain, branched chain, cycloalkane.
Explanation:
Edg 2021
Answer:
A: branched chain, B: cycloalkane, and C: straight chain.A: straight chain, B: branched chain, and C: cycloalkane.Explanation:
Aqueous aluminum phosphate reacts with solid magnesium to produce solid aluminum and aqueous magnesium phosphate. Write the balanced chemical equation for this chemical reaction using the correct chemical formulas and include conditions (s, l, g, or aq). Put your answer in the box below.
Answer:
2AlPO4(aq) + 3Mg(s) -------> Mg3(PO4)2(aq) + 2Al(s)
Explanation:
The principle of writing balanced chemical reaction equations states that; the number of atoms of each element on the right hand side of the reaction equation must be equal to the number of atoms of the same element on the left hand side of the reaction equation.
The reaction is between aqueous aluminum phosphate reacts and solid magnesium to produce solid aluminum and aqueous magnesium phosphate. The equation is represented as follows;
2AlPO4(aq) + 3Mg(s) -------> Mg3(PO4)2(aq) + 2Al(s)
is a straight chain, a linear chain and an unbranched chain the same thing?
Answer:
All carbon atoms can be connected to a continuous chain in the straight-chain alkane. In alkanes of a branched-chain, all carbon atoms cannot be connected to a continuous chain as a branch or side chain is part of the carbon chain.
Explanation:
How do we balance a chemical equation?
O adding elements as necessary
changing subscripts
erasing elements as necessary
placing coefficients
Answer: placing coefficients
Explanation: In a balanced chemical equation, the total number of atoms of each element present is the same on both sides of the equation. Stoichiometric coefficients are the coefficients required to balance a chemical equation. These are important because they relate the amounts of reactants used and products formed.
If Darian contains 3.25 moles of gas in a container with a volume of 60.5 liters and at a temperature of 400 K, what is the pressure inside the container?
PV = nRT
with atm: R = 0.0821 L*atm/(K*mol) with kPa: R =8.31 L*kPa /(K*mole)
Answer:
1.76atm
Explanation:
Using the ideal gas law equation;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question,
P = ?
V = 60.5 liters
n = 3.25 moles
T = 400 K
R = 0.0821 Latm/molK
Using PV = nRT
P = nRT/V
P = (3.25 × 0.0821 × 400) ÷ 60.5
P = 106.73 ÷ 60.5
P = 1.76atm
HURRY!!!
What can you infer about the growth of the seed represented in the graphs below?
Answer:
B
Explanation:
Potassium hydrogen phthalate, KHP, is used as a primary standard for determining the concentration of a solution of NaOH by titration. If the KHP has not been dried before weighing, the calculated molarity of the NaOH would be
A) higher than the actual value, since water is included in the apparent mass of KHP
B) higher than the actual value, since the presence of water requires a larger volume of titrant
C) lower than the actual value, since NaOH absorbs water
D) unaffected, since KHP is a strong acid
E) unaffected, since water is routinely added before the titration
Answer:A
Explanation:
If the KHP has not been dried before weighing, the calculated molarity of the NaOH would be higher than the actual value, since water is included in the apparent mass of KHP.
The KHP is Potassium hydrogen phthalate. It is commonly used as a primary standard in pure form for sodium hydroxide titrations because it is stable in air making it easy to weigh.
However, if KHP is not dried very well, the mass of water is included as part of the mass of KHP and this will make calculated molarity of KHP to be higher than the actual value.
Again, the reaction between KHP and NaOH has a 1:1 molar ratio so if the molarity of KHP is higher than its actual value, the molarity of the NaOH would also be higher than the actual value.
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Balance the following equation:
__Hg + __O₂ --> __HgO
Answer:
4Hg+2O2=4HgO
four Mercury + four oxygen
PLLLLLLLZ HELP IS NEEDED ASAP I WOULD REALLY APPRECIATE IT
Answer:
1)Reactants
2)Light
3)An item that can increase reaction rates
4)Reactants must collide with each other
Less molecules lower the chance for collisions
The more collisions there are the higher the reaction rate
What do sex hormones do?
Answer:
Hormones help regulate many bodily processes, such as appetite, sleep, and growth. Sex hormones are those that play an essential role in sexual development and reproduction. The main glands that produce sex hormones are the adrenal glands and the gonads, which include the ovaries in females and testes in males
Explanation:
What likely caused these different results?
Answer:
hope help you stay happy
8. Which of the following have bacteria in their root nodules that fix nitrogen?
1. Legumes
b. Meat
c. "Trees
d. Algae
Answer:
Option A
Explanation:
Leguminous plants like pulses etc. have root nodules comprising of rhizobacterium which live in a symbiotic relationship with the roots of the plant and in turn fix the nitrogen in the soil in the roots of the leguminous plants.
Hence, option A is correct
Looking at the chart, which substance would heat up the fastest?
Question 9 options:
Iron
Aluminum
Brass
Alcohol
Answer:
Aluminum would heat up the faster
in what group and periods is most reactive metals
If you have a gas stored at a constant temperautre, describe how increasing the pressure will affect the volume.
Answer:
It means that for a gas at a constant temperature, pressure × volume is also constant. So increasing pressure from pressure1 to pressure2 means that volume1 will change to volume2, providing the temperature remains constant.
Describe four effects that radiation can have on the human body.
Answer:
There are many effects of radiation to the human body. (if you watch the 100, you'll see what happens)
Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as
1. weakness
a/ fatigue,
b/ fainting,
c/ confusion.
2.Bleeding from the nose,
a/ mouth,
b/ gums,
c/ rectum
3. Bruising,
a/ skin burns,
b/ open sores on the skin,
c/ sloughing of skin.
4. Dehydration.
5. Diarrhea, bloody stool.
6. Fever.
7. Hair loss.
8. Inflammation of ex
14.
Unlike addition polymers, condensation polymers form from _____.
monomers that have only one functional group
the head-to-tail joining of monomer units
the joining of unsaturated monomers
monomers that have at most three carbon atoms
Answer:
Addition polymers are formed when monomer units join each other in a process that involves the rearranging of electrons in double or triple bonds in the monomer. The polymer is the ONLY product formed.
EX:C=C + C=C + C=C - ·C-C-C-C-C-C·
Ethene(ethylene) monomers -> part of polyethene
Explanation:
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Answer:Predatorrrrrrrrrrrrrrrr
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How much energy (in KJ) is needed to melt 15g of ice at -4oC and raise it to a temperature of 115oC? Round the closest number, and include units
Answer:
The energy needed is 45.7659 kJ
Explanation:
The given mass of the ice, m = 15 g
The initial temperature of the ice, T₁ = -4°C
The temperature
The final temperature, T₂ = 115°C
The specific heat capacity of ice, c₁ = 2.09 J/(g·°C)
The latent heat of ice, l₁ = 334 J/g
The heat capacity of water, c₂ = 4.184 J/(g·°C)
The latent heat of vaporization, l₂ = 2260 J/g
The specific heat of steam, c₃ = 2.02 J/g
Therefore, we get the energy needed, ΔQ, as follows;
ΔQ = m·c₁·(T₂ - Tₐ) + m·l₁ + m·c₂(Tₓ - Tₐ) + m·l₂ + m·c₃·(T₂ - Tₓ)
Where;
Tₐ = The melting point temperature of water = 0°C
Tₓ = The boiling point temperature of water = 100°C
∴ ΔQ = 15×2.09×(0 - (-4)) + 15 × 334 + 15×4.184×(100 - 0) + 15×2260 + 15×2.02×(115 - 100) = 45,765.9
The energy needed, ΔQ = 45,765.9 J = 45.7659 kJ.