Explanation:
I am not sure without knowing the name of the solutions. But according to me it can be happen which are D bcz when two solutions for e.g acid and base are mixed together, it changes its colour an form salts.
If a gas at 20.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a
pressure of 2.50 atm? 1.44L
Answer:
1.44L
Explanation:
P1V1/T1=P2V2/T2
since the temperature didn’t change, stay at 20celsius, we can ignore T1 and T2.T1=T2
(1.00atm)(3.60L)=(2.50 atm)V2
V2=(1.00atm)(3.60L)/(2.50atm)
=1.44L
A graduated cylinder was filled with 25.0 mL of water. A solid object was immersed in the cylinder, raising the water level to 32.9 mL. The volume of the object was calculated as 7.9 mL. The solid has a mass of 69.2 grams. What is the density of the object?
Answer:
Density of the object is 8759.494 grams/L
Explanation:
As we know density of an object is mass of the object divided by its volume
Given
Volume of the object is equal to the change in volume of water with in the cylinder when the object was immersed in water.
Hence, volume of object is equal to
[tex]32.9 -25 = 7.9[/tex] mL
Mass of the object is [tex]69.2[/tex] grams
Density
[tex]= \frac{69.2}{7.9 *10^{-3}}\\= 8759.494[/tex] grams/L
Density of the object is 8759.494 grams/L
Calculate the amount of heat energy required to heat up 15.9 grams of ice from -4 °C to 14°C.
Answer:
581 Joules.
Explanation:
Using the formula;
Q = m × c × ∆T
Where;
Q = amount of heat absorbed (J)
m = mass of substance (g)
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
According to the information provided in this question;
Q = ?
mass of ice = 15.9g
initial temperature = -4°C
final temperature = 14°C
Hence, ∆T = 14 - (-4) = 14 + 4 = 18°C
specific heat capacity (c) of ice in J/g°C = 2.03 J/g°C
Using Q = m × c × ∆T
Q = 15.9 × 2.03 × 18
Q = 32 × 18
Q = 581 Joules.
In a separate location, take notes from the sources you have identified. The notes will provide details for your presentation. While taking notes from texts and websites, use these reading strategies. In the space provided, write four pieces of information that you intend to use in you presentation
Answer:
you didn't specify what the presentation was about. However, I can help you by showing you how to do this activity.
When making notes of the sources, you must show when these sources were built and what is their direct relationship with your research, in addition to highlighting the concepts and parts you will use in your presentation. It is also important that you show the connection between the sources, that is, how they come together to collaborate for your presentation. We must not forget that you must have different sources, that is, different media, such as websites, books, magazines, interviews, videos, among others.
After you have highlighted which parts of the sources you will use in the presentation, you should reread those parts and make topics about which point of those parts will be used in your presentation, that is, you must show the most revealing points, those to which you won't talk about.
Which of the following describes how a recycling program directly benefits a community economically? The guarantee of no new landfills or incinerators O Fewer city taxes than in non-recycling communities O More potential employment opportunities and revenue O Higher property values than non-recycling communities Mark this and return
Answer:
I guess second option i.e. More potential employment opportunities and revenue because collecting recyclable material needs manpower to collect them, and secondary employment in transport i.e. to collect all the material at one place we need transport and so on!
If Earth is in between the sun and the Moon in both Image 1 and Image 2, why do you think a lunar eclipse is only happening in Image 2?
Answer: well I don’t have either picture but here goes anyway. It could be that the suns rotation matched up with the moon being 400 miles away from it and 400 times bigger it could be in image 1 the sun is only at a partial eclipse. With no images kinda had to wing it but I hope it helps :D
A lunar eclipse is an event that occurs when the sun, moon, and earth are aligned. It is happening in image 2 as Earth is obstructing the sun’s light.
What is a lunar eclipse?In lunar eclipse Earth completely covers the surface of the moon which makes the surface look red and dark. It happens only when the Moon is opposite the sun in the sky.
It is not seen in the first image as the earth is incapable of totally blocking the sunlight and hence does not result in a lunar eclipse. In the second image, the Earth has covered the whole surface of the moon and hence is blocking the sunlight.
Therefore, a lunar eclipse is seen only in image 2.
Learn more about the lunar eclipse here:
https://brainly.com/question/4198384
The air in a living room has a mass of 60 Kg and a specific heat of 1,020 J/kg°C. What is the change in thermal energy of the air when it warms from 20°C to 25°C?
Answer:
Q = 306 kJ
Explanation:
Given that,
Mass, m = 60 kg
Specific heat, c = 1020 J/kg°C
The temperature changes from 20°C to 25°C.
Let Q be the change in thermal energy. The formula for the heat released is given by :
[tex]Q=mc\Delta T[/tex]
Put all the values,
[tex]Q=60\times 1020\times (25-20)\\\\Q=306000\ J\\\\or\\\\Q=306\ kJ[/tex]
So, 306 kJ is the change in thermal energy.
Evidence of a chemical change would be
A) melting
B) spinning top
C) spilled bucket of water
D)rusting car fender
How many Red data lists were compiled for South Africa?
Answer:
Don't know if I know itat all
Explanation:
what is red data list
write 2 typical properties that are only common to transition metals
Answer:
Properties of transition elements
they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling points, and are good conductors of heat and electricity.
Low frequency waves are ______apart. *
Photosynthesis uses all of the following except
to make food.
carbon dioxide
O light energy
O chemical energy
water
is it’s A?
If anybody is willing to help me with this question that'd be much appreciated!
Answer:
Oxidation Reduction
Explanation:
Your welcome ;) Marking me brainliest would make me be very appreciative
Write and balance the following reaction: Hydrogen gas reacts with oxygen gas to form water.
Answer:
[tex]2H_2 + O_2 -> 2 H_2 O[/tex]
Q7: Your car has a mass of 1000 kg. If your car produces a force of 3000 N, how fast will it accelerate?
Answer:
3 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]acceleration = \frac{force}{mass} \\[/tex]
We have
[tex]a = \frac{3000}{1000} = 3 \\ [/tex]
We have the final answer as
3 m/s²Hope this helps you
What type of ions are commonly formed from halogens
Answer:
they all form diatomic molecules.
for example: H2, F2, Cl2, Br2, I2, and At2) and they all form negatively charged ions H-, F-, Cl-, Br-, I-, and At- .
10
50.
Which of the following indicators
turns yellow in an alkaline solution
during an acid-base titration?
A.
B.
C.
D.
E.
Phenolpthalein
Phenol red
Methyl red
Methyl orange
Congo red
Answer:
Methyl orange is an indicator which turns yellow in an alkaline solution.
Answer:
i think its (methyl orange)
I need help some plz and don’t give me no virus or some fake answer I really need help
Answer:
1.) The possible genotypes are FF and Ff
The phenotype is full pod shape
2.) The possible genotypes are GG, Gg, and gg
The photypes are Green (for those whose genotype is GG and Gg) and yellow ( For those whose genotype is gg)
Explanation:
My hand writting isn't the best so I'll also type it.
1.) There are only 2 possible genotypes the offspring can have which are FF or Ff.
Because the dominant allele is F all the offspring from this cross will have a full pod shape phenotype.
2.) There are only 3 possible genotypes the offspring can have which are GG, Gg, and gg.
The majority of the offspring will have a green phenotype while the remainder will be yellow. G is the dominant allele so any offspring with the genotype GG or Gg will be green. While g is a recessive allele and only offspring who has a genotype of gg will be yellow.
*On my paper for question 2 for the phenotype explination I accidently wrote genotype instead of phenotype.
*Another note is that an offspring must have both recessive alleles in order to show the recessive traits. That is why gg is yellow and Gg is green.
Hope I helped
Find the energy of a photon with a wavelength of 820. nm?
Answer: The energy of a photon with a wavelength of 820 nm is [tex]2.42 \times 10^{-19} m[/tex].
Explanation:
Given : Wavelength = 820 nm
Convert nm into meter as follows.
[tex]1 nm = 10^{-9}\\So, 820 nm = 820 nm \times \frac{10^{-9} nm}{1 nm}\\= 820 \times 10^{-9} m[/tex]
The relation between energy and wavelength is as follows.
[tex]E = \frac{hc}{\lambda}[/tex]
where,
E = energy
h = Planck's constant = [tex]6.63 \times 10^{-34} kg m^{2}/s[/tex]
c = speed of light = [tex]3.0 \times 10^{8} m/s[/tex]
[tex]\lambda[/tex] = wavelength
Substitute the values into above formula as follows.
[tex]E = \frac{hc}{\lambda}\\= \frac{6.63 \times 10^{-34} kg m^{2}/s \times 3.0 \times 10^{8} m/s}{820 \times 10^{-9} m}\\= \frac{1.989 \times 10^{-25}}{820 \times 10^{-9}}\\= 2.42 \times 10^{-19} m[/tex]
Thus, we can conclude that energy of a photon with a wavelength of 820 nm is [tex]2.42 \times 10^{-19} m[/tex].
during what part of the day (night or day) can a solar be observed? explain your answer.
subject is science, please help me thx yal
What is the main need or want the wave technology shown meets?
Answer: To efficiently communicate with others
Explanation:
this was the right on answer for me might be different for others
The main need or want the wave technology shown meets to see objects surrounding more clearly.
What is wave technology ?It is a floating device that operates in the same direction as the waves. With the use of the technology, energy may be captured even from relatively small waves. The device that is moved by waves activates a hydraulic system that can power a generator. The tube segment contains all the generation equipment and systems.
Early mechanization (1770s to 1830s), steam power and railroads (1830s to 1880s), electrical and heavy engineering (1880s to 1930s), Fordist mass production (1930s to 1970s), and information and communication are the five waves that have so far slammed into our society (1970s to 2010s).
Wave energy, also known as wave power, is the energy that ocean surface waves carry and absorb. The energy is then put to use in a variety of productive ways.
Thus, The main need or want the wave technology shown meets to see objects surrounding more clearly.
To learn more about the wave technology, follow the link;
https://brainly.com/question/23345080
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what electrolyte is used in a lead storage battery?
A. hydrochloric acid
B. sulfuric acid
C. lead acetate
D. lead nitrate
Answer:
Hi ,
Answer :
Sulfuric acid
A chemical reaction is carried out in a closed container. the energy absorbed by the chemical reaction is 100 kj. What is the energy liberated from the air or the walls of the container?
A. 100 kJ
B. 50 kJ
C. 25 kJ
D. 75kJ
Answer:
Option A
Explanation:
The total heat absorbed during the chemical reaction is the total heat released by the surrounding.
Net change of heat is equal to zero
Hence, the energy liberated from the air or the walls of the containers would be equal to the energy absorbed by the chemical reactions is equal to 100 Kj
Thus, option A is correct
2.
Gallium sulfide
How do I draw this in Lewis dots?
How many moles of propane gas would be present in 11 grams
of the gas at standard conditions?
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.24moles of propane gas would be present in 11 grams of the gas at standard conditions.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole of substance =given mass of substance ÷ molar mass of substance
Molar mass of 1 mole of propane gas= 44.0956 g/mol
Given mass of propane gas=11 grams
Substituting all the given values in the above equation, we get
mole of substance =11 grams ÷44.0956 g/mol
mole of substance =0.24moles
Therefore, 0.24moles of propane gas would be present in 11 grams
of the gas at standard conditions.
To know more about mole, here:
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What type of shape do solids have?
hope it helps :-). good morning.
In the decomposition of KCLO3, how many moles of KCL are formed in the reaction that produces 0.05 moles of O2?
Answer:
0.033 moles of KCl are formed.
Explanation:
The reaction that takes place is:
2KClO₃ → 2KCl + 3O₂To solve this problem we need to convert 0.05 moles of O₂ into moles of KCl, to do so we use the stoichiometric coefficients of the balanced reaction:
0.05 mol O₂ * [tex]\frac{2molKCl}{3molO_2}[/tex] = 0.033 mol KClIf 0.05 moles of O₂ are produced, then 0.033 moles of KCl are formed as well.
How many atoms are in 14 moles of I? Watch your significant figures.
A. 8.4 x 10^24 atoms of l
B. 8.43 x 10^24 moles of l
C. 8.4 x 10^23 atoms of I
D. 8.43 atoms of l
Answer:
8.43 x 1024 moles of I
Explanation:
Help please!
During which
intervals are
kinetic energy increasing?
Answer:
1
Explanation:
Because The Kinetic Energy Is Very similar to Potential Energy
A substance with a specific heat of 5 J/g°C absorbs 25 Joules of energy and increases from 75°C to
125°C. What is the mass of this substance?
1.0 gram
O 0.01 gram
0.1 gram
O 10 grams
Explanation:
0 10 grams that that should be the answer
