Answer:
c. remain the same
Explanation:
Since DDT is persistent and does not break down when release into the environment, it is expected that its concentration as passes along the food chain will likewise persist.
If a substance is non-biodegradable, when it enters the body system or any living tissue, it passes on as waste. Such matter is not broken down or transformed into another type. Over many years, it will remain as it is. We can picture this problem by using non-biodegradable plastics. They remains just the same in the environment.1. An atom has 57 neutrons and 42 protons. How many electrons will this atom have if it
neutral?
57
44
42
40
Answer:
42
Explanation:
Because the proton number or atomic number is equal to electron number.
Answer:
42
In order for it to be neutral there must be the same amount of protons and neutrons
Have a nice day! :)
Calculate the volume of this irregular solid to the nearest cubic centimeter.
What is the volume of the key?
Answer:
The answer is 8cm
Explanation:
:)
Answer:
8 cm
Explanation:
____ energy is the energy a roller coaster stores while moving to the top of a hill.
A. G-Force
B.Potential
C. Stirred
D. Kinetic
Answer:
B
Explanation:
trust me im 100% correct
How do combination circuits help prevent problems in circuits in a home? If it helps, think about a bedroom since all electrical work in a bedroom is on the same circuit.
Nio conducts a science experiment. He puts yeast into a bottle with water and sugar, and then caps the bottle with a balloon. He returns two hours later and notices there are bubbles on the surface of the mixture in the bottle and that the balloon has inflated, but there are no other apparent changes.
What most likely happened?
a non-chemical change, because there are no indicators of chemical changes taking place
a chemical change, because the mixture changed color
a chemical change, because a gas was produced
a non-chemical change, because the changes that occurred are reversible
Answer:the answer is a chemical change, because a gas was produced
Explanation: yeast is a chemical
Answer:
The answer is C.
"Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions."
Explanation:
I need help on Chemistry?
ANYONE PLEASE?
Answer:
1. 1g/ml
Explanation:
1. Density is mass divided by volume (g/mL).
10g/10mL = 1 g/mL
2. When you already know the density and the volume, you can use the density as a unit converter.
[tex]5mL*\frac{20g}{mL} = 100g[/tex]
3. It's the same with density and mass.
[tex]20g*\frac{1mL}{5g} = 4mL[/tex]
What type of graph can show a positive correlation, negative correlation, or no correlation?
A. Pie chart
B. Bar graph
C. Scatter plot
D. Line graph
what is the percent of mercury?
Answer:
42%
Explanation:
Through what process is heat transferred between the warmpair in front of a
fireplace and the cooler air on the other side of the room?
A. Radiation
B. Conduction
C. Convection
D. Absorption
Answer:
c-convection
Explanation:
i think it may help you and if its helpful plzz mark as brilliant
Which statement best defines potential enregy?
A. Potential energy is stored energy.
B. Potential energy is energy that can change over time.
C.Potential energy is the energy of motion.
D. Potential energy is the type of energy a roller coaster uses.
Answer:
A. Potential energy is stored energy
Explanation:
Answer:
A
Explanation:
i have the same question
Please help will give brainliest
6 g/cm³
Explanation:Hi there !
density formula
d = m/V
V = 33.0ml - 25.0ml = 8.0 ml = 8 cm³
m = 48.0 g
replace
d = 48g/8cm³ = 6 g/cm³
Good luck !
Why is it easy for some elements to lose electrons and harder for others?
Answer:
The further away electrons are from the nucleus the easier it is for atoms to use electrons.
Explanation:
What phenomenon does the Coriolis effect arise from?
Answer:
because our planet is spinning
which means the objects near the equator are moving at much faster velocities than objects at higher latitudes
I hope this helps✌
A sealed 512 cm3 flask is full to capacity with 16 g of a substance. Determine the density of the substance.
Answer:
The answer is 0.031 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 16 g
volume = 512 cm³
We have
[tex]density = \frac{16}{512} = \frac{1}{32} \\ = 0.03125[/tex]
We have the final answer as
0.031 g/cm³Hope this helps you
Jamal is 8 miles away from his house. He rides his bike home toward home at a speed of 12 mph..
How far away from home is he after a half hour?
Answer: 2miles
Explanation:if he’s going 12 miles in one hour, in half an hour he would’ve made it 6 miles. 8-6=2
Answer: b. 2 miles
Explanation:
Solve for Keq , given the following concentrations at equilibrium. Based on the calculated Keq, are products or reactants larger?
CO2 = 3.0 M O2 = 1.5 M CO = 2.0 M
Answer:
it blows up very lighty
Explanation:
PLEASE HURRY WILL GIVE BRAINLIEST
Click Oil Basics and use the information to complete this passage that discusses how plastic production affects society.
The production of plastics makes life
{answer} , so it benefits society. On the other hand, the production of plastics causes air and water {answer} , so it also harms society.
Answer:
easier and pollution
Explanation:
I just had this question and got it right
You just got a free ticket for a boat ride, and you can bring along
2 friends! Unfortunately, you have 5 friends who want to come along.
Answer:
10
Explanation:
Khan Academy
An acid-base reaction of (r)-sec-butylamine with a racemic mixture of 2-phenylpropanoic acid forms two products having different melting points and somewhat different solubilities. Draw the structure of these two products. How are the two products related? Be sure to answer all parts.
Answer:
See explanation
Explanation:
When an optically active compound reacts with a racemic mixture, two different products appear .
Hence, when (R)-sec-butylamine reacts with a racemic mixture of 2-phenylpropanoic acid as shown in the image attached.
Enantiomers are optical isomers which are mirror images of each other. The image attached was obtained from Bartleby.
what does it mean if elements are in the same group on the periodic table?
Answer:
mostly metals
Explanation:
just learned
Based on the results the students record, which group makes the most accurate measurements of the object?
Answer:
B.
Explanation:
It’s because when you subtract 78.5 and 77.5 you get 1. And when you do 79.5 and 78.5 you get 1 too. I know this because I got the answer right
Each water molecule can form hydrogen bonds with up to _____ neighbors
Group of answer choices
6
8
2
4
Answer:
2
Explanation:
thats the answer.have good day
which balances the equation Mg + O2 → MgO
Answer:
2Mg+[tex]O_{2}[/tex]→2MgO
Explanation:
The first step is magnesium + oxygen equals magnesium oxide
The second step is changing that into an equation which looks like Mg+[tex]O_{2}[/tex]→MgO
The third step is to 2*Mg and 2*O as well as the product has to be 2*Mg,2*O which gets the equation to become balanced as 2Mg+[tex]O_{2}[/tex]→2MgO
The coefficient 2 balance the given reaction. The balanced equation for the given reaction is given as [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
A balanced equation is a mathematical representation of a chemical reaction that respects the law of mass conservation. It depicts the reactants and products of the reaction, as well as the relative amounts of each species. The unbalanced equation is [tex]\rm Mg + O_2 \rightarrow MgO[/tex]. One magnesium (Mg) atom on the left side and one on the right side, so the magnesium is already balanced. Balance the oxygen (O) atoms. On the left side, there are two oxygen (O) atoms present in the O2 molecule. On the right side, there is only one oxygen (O) atom in the MgO molecule. To balance the oxygen atoms, we need to add a coefficient of 2 in front of MgO: [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex]. The balanced equation is [tex]\rm Mg + O_2 \rightarrow 2MgO[/tex].
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What is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Answer:
c. .....................
Answer: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Your carbon footprint is the amount of carbon dioxide and other carbon compounds emitted, because of your use of fossil fuels.
Hope this helps!
Write the principle of separation of mixture.
Explanation:
Mixtures can be separated using a variety of techniques. Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material.
Which best explains how photosynthesis is helpful to humans? OIt reduces the amount of harmful rays released by the sun. O It increases the levels of carbon dioxide in the air. O It provides oxygen for humans to breathe. OIt produces proteins, which humans can eat.
Answer:
C. sorry i am late :)
Explanation:
During photosynthesis, plants intake carbon dioxide from the air and releases oxygen. Thus, they are providing enough oxygen available for humans to breath.
What is photosynthesis?Photosynthesis is a bio-chemical process by which green plants produces chemical energy with the aid of light energy absorbed by chlorophyll. Photosynthetic reaction is the combination of carbon dioxide and water giving molecular oxygen and glucose.
Through photosynthesis, the amount ox oxygen and carbon dioxide in the atmosphere is balanced. This balancing cycle involves respiration of animals also.
The carbon dioxide that we exhale are up taken by plants and converts to oxygen gas. This makes sufficient oxygen for all animals to breath. Therefore, photosynthesis is a stage in carbon cycle and oxygen cycle.
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Consider the reaction below. 2 Upper N Upper H Subscript 3 (g) Baseline double headed arrow Upper N Subscript 2 (g) Baseline + 3 Upper H Subscript 2 (g). What is the most likely effect to the forward reaction if there is an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases. The reaction is not affected at all. The reaction stops completely.
Answer:
The increase in pressure of the reacting system will increase the formation of NH₃
Explanation:
The given parameters are;
2NH₃ (g) ⇄ N₂ (g) + 3H₂ (g)
The number of molecules in the reactant side of the equation = 2 molecules
The number of molecules in the product side of the equation = 1 + 3 = 4 molecules
Avogadro's law states that equal volume of all gases at a given temperature and pressure contains equal number of molecules
Therefore, given that the number of molecules of the product are twice the number of molecules of the reactant, the volume of the product is twice the volume of the reactant
If the pressure is increased, at constant temperature by Boyles law, the volume will be reduced, favoring the formation of the low volume occupying NH₃
Therefore, the reverse reaction (formation of NH₃) will preferably occur.
Answer:
The answer is B
Explanation:
The other answer is incorrect. The correct Answer is B
Trust Me
Which is the smallest?
A) 1.3 x 1020
B) 2.9 x 1021
C) 9.5 x 1032
d) 8.4 x 1019
If air temperature decreases, then
wave height will decrease
ocean temperature will also decrease the same amount
ocean temperature will also decrease, but not as much
ocean temperature will also decrease, but a greater amount
wave height will increase
Answer:
ocean temp
Explanation:
If air temperature decreases, then wave height will decrease and ocean temperature will also decrease, but not as much.
What is ocean temperature ?The water's temperature at the surface is known as the ocean surface temperature. Depending on the measuring technique, the term "surface" might signify anything from 1 millimeter to 20 meters below the sea's surface.
Due to changes in solar radiation and the physical characteristics of water, the temperature of ocean water fluctuates depending on location, both in terms of latitude and depth.
Water contracts and gets denser as it cools. The density of water is influenced by temperature and salinity, and as a result, water moves up or down through the ocean's strata and circulates as currents.
Thus, option B is correct.
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Which example illustrates a chemical change
shredding paper
smashing a soda can
burning wood
chopping wood