I'm just straight confused by it
Answer:
B
Explanation:
(Usually give an explanation, but doing an exam, so just trust)
List ways on how to lessen human impacts in the environment
Answer:
Explanation:
Completely turn off equipment like televisions and stereos when you're not using them.
Choose energy-efficient appliances and light bulbs.
Save water.
Lower your shades or close your curtains on hot days, to keep the house cool and reduce the use of electric fans or air-conditioning.
Let clothes dry naturally.
Keep lids on pans when cooking to conserve energy.
Use rechargeable batteries.
Don’t use “throw away” products like paper plates and napkins, or plastic knives, forks and cups.
Send electronic greetings over email, instead of paper cards.
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C.
Show that the results of these dulys
Calculate the oxidation state of Manganese in the following
i. KMnO4 ii. Mno4-
i) KMnO4
lets calculate using x method
1+x+ 4(-2) = 0
1+x-8 =0
x= 7
ii)MnO4‐
x+4(-2) = -1
x-8 = -1
x = 7
What is the molar mass of H2S?
0 518
65.15 g
17 g
78.16 g
34.1g
Which best describes the purpose of a fever?
Answer:
when you have a fever your body is trying to fight off a virus or some other kind of bad Bacteria
Explanation:
I think this because everyone has at least had a fever when they were sick and when you are sick you are likely to have a fever because your body is fighting off a bad bacteria
Which of the following represents alpha decay?
Answer: b
Explanation: alpha decay or particle consist of two protons and two neutrons hence it is a helium nucleus.
An alpha particle [tex]\binom {4} {2}[/tex]He is produced in alpha decay reactions, while the parent nucleus' atomic number and mass number drop by 2 and 4 correspondingly.
Alpha decay:Alpha decay is a nuclear process whereby an unstable nuclear transforms into a different element by ejecting particles composed of two protons and two neutrons. The alpha particle also referred to as a helium nucleus, is the expelled unit of matter. Alpha particles have large masses and electrostatic attraction.An atomic number decreases by 2 and the atomic weight drops by 4 when a radioactive nucleus disintegrates by emitting [tex]\bold{\alpha}[/tex] particle.Therefore, the final answer is "Option B".
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If you have 3 mol of glucose in 6 L of solution, what is the molarity of the
solution?
Answer:
0.5 M
Explanation:
Molarity = moles of solute / liters of solution
Calculate the number of moles of 2.00g of K2SO4
The growth of the plants that the animal used for food could not keep up with the needs of the population. There was so little food for the animals, the population declined. How does this relate to overpopulation?
Question options:
This does not relate to overpopulation.
Overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
Overpopulation means that there are too many members in the population and that in the end, this will increase their chances for survival.
Overpopulation means that there are few members in the population and that in the end, this will increase their chances for survival.
Answer:
The number of animals greatly exceeded the carrying capacity, destroying the food sources and causing the population to decline.
ALSO
Overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
Explanation:
The statement relates to overpopulation as overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
What is overpopulation?Overpopulation means an increase in the number of a specific population in a specific place.
Overpopulated species harm other species. It competes for the food and place.
It also decreases the number of species that are its prey.
Thus, the correct option is B.
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Identify the two acids and the two bases out of the 5 chemicals below: NaOH/ HCI /H2SO4/ Ca(OH)2 /NaBr *
Answer: NaOH and Ca(OH)2 are bases. HCl and H2SO4 are acids
Explanation:
6. What is the atomic number of the element?
7. How many neutrons does this element have?
8. What is the atomic mass of this element?
9. How many electrons does this element have?
Answer:
For O: atomic number = 8 # neutrons = 8
For Al: atomic mass = 27, # electrons = 13
why should Asus be stores only in the glass containers please answer this
Answer:
Do you mean acids?
Due to chemical reaction
Explanation:
Acids are only stored in glass containers because glass containers rarely react with any substance.They dont react with acids and prevent chemical reaction so the acids can be kept. If acids were kept in metal containers it would react .
How much of a 10 M solution is needed to make 1 liter of a 1M solution?
a. 1ml
b. 1000ml
c. 10ml
d. 100ml
i dont know I hope someone knows soon take care
According to molar concentration, 100 ml of 10 M solution is needed to make 1 liter of a 1 M solution.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case of two solutions, molar concentration is found out by, M₁V₁=M₂V₂.
On substitution in above formula, V₁=1×1/10=0.1 L=100 ml.
Thus, 100 ml of a 10 M solution is needed to make 1 liter of a 1 M solution.
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Which process is represented by the label A?
Answer:
I believe its compaction
Explanation:
Compaction is how sedimentary rock is formedm
Need help. Will pay if needed, or give away points. CHEMISTRY
Answer:
C. So electrons can flow from one electrode to another
Explanation:
An electrochemical cell is any cell in which electricity is produced by reason of a chemical change.
An electrochemical cell consists of two electrodes, these two electrodes are connected using a wire.
Usually, electrons flow from one electrode to another via this wire thereby enabling the electrochemical processes of oxidation and reduction in the cell to proceed effectively.
What are surface currents? What drives them?
Answer:
Surface currents in the ocean are driven by global wind systems that are fueled by energy from the sun. Patterns of surface currents are determined by wind direction, Coriolis forces from the Earth's rotation, and the position of landforms that interact with the currents
if (H+] = 10^-2 M
what will be pH = ?
Pls help on test (no old answers OR files)
During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4.
What is the amount of the leftover reactant?
0.74 grams of methane
0.89 grams of methane
1.22 grams of oxygen
1.45 grams of oxygen
Copper (II) reacts with silver nitrate in a single displacement reaction. How many grams of copper are needed to react with 510 grams of silver nitrate?
how does the human voice work
Answer:
vocla cords
Explanation:
what are the three method used to treat water ?
Answer:
The three methods used to treat water are
Filtration SedimentationDistillationExplanation:
These methods used include physical processes, biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.
Energy is added to cool water in a beaker. The energy causes the temperature of the temperature to rise. Which term best describes the energy? (A) Heat energy, (B) Chemical energy, (C) Electrical energy, (D) Potential Energy.
Answer:
(A) Heat energy
Explanation:
Temperature can be defined as a measure of the degree of coldness or hotness of a physical object. It is measured with a thermometer and its units are Celsius (°C), Kelvin (K) and Fahrenheit (°F).
Conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction.
In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.
Any material or object that allow the conduction (transfer) of electric charge or thermal energy is generally referred to as a conductor. Conductors include metal, steel, aluminum, copper, frying pan, pot, spoon etc.
In this scenario, Energy is added to cool water in a beaker. The energy causes the temperature of the temperature to rise. Thus, the term which best describes the energy is heat energy because the object becomes hotter due to an increase in temperature and heat applied.
20. Calculate the volume of 847 g of SO2 gas at a pressure of 89.4 kPa and 40 °C.
JUST NEED THIS LAST ONE SOMEONE HELP ME ITS DUE SOON
Answer:
243L of SO2
Explanation:
You'll want to use the Ideal Gas Law for this problem.
First, determine your formula. V=nRT/P
Next, determine your factors.
V = ?
n = 847g
R = 0.0821L.atm/mol.k
T = 313k (40+273)
P = 89.4kPa
Now just plug it in!
847g x 313k / 89.4kPa x 0.0821L.atm / mol. K
243L of SO2. Hope this helps!
I need help with this…and can you so the work if you can!!
Answer:
88 grams CO2
Explanation:
Convert from grams to moles to mole ratio to grams again
32 g CH4 * 1 mol CH4/16 g CH4 * 1 mol CO2/1 mol CH4 * 44 grams CO2 = 88 grams CO2
Lemme know if u need more explanation!
How many ounces is 68 g?
O A. 0.42 oz
O B. 28.3 oz
O C. 4.8 oz
O D. 2.4 oz
Answer:
D
Explanation:
Which of the following can be used to measure an object's
speed?
Answer:
distance traveled divided by the time it traveled
Explanation
this is just an equation for how to find speed. you can also just use like a meterstick and a stopwatch
Zinc reacts with Copper (II) chloride to produce Copper and Zinc chloride. -write chemical formula
Answer:
here's the answer hope it helps
Why are shadows shorter around noon?
Make sure you give a full, detailed answer, not just one sentence.
Answer: Answer is in the Explanation.
Explanation: At noon the sun is directly above in the sky, the sun's rays are falling on the body making the shadow smaller. While in the evenings and mornings the sun is at a inclined position, so the sun's rays are falling at a inclined position making the body's shadow larger.
I looked it up on the internet and reworded it as good as I could.
The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?
A. homogeneous mixture
B. compound
C. heterogeneous mixture
D. element
How much energy does a copper sample absorb as heat if its specific heat is 0.384 J/g.°C, its mass is 8.00 g, and it is
heated from 10.0°C to 40.0°C?
Answer:
.0016
Explanation:
For specific heat problems you use the formula :
Q = mcΔT
They've given you the m, c and delta T, so you can plug in those values. (for the temperature change subtract 10 from 40 to see that it grew 30 degrees)
You're looking for Q so leave that variable in the equation. Then solve.
.Q = (8.00)(.384)(30)
Q = 92.16
92.16 J energy will be absorbed by a copper sample.
Given:
Specific heat capacity, C= 0.384 J/g °C
Temperature, T₁ = 10.0°C and T₂= 40.0°C
Mass, m=8.00 g
We know that,
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (g) of the material when its temperature increases or 1 °C, and its unit is J/g °C.
Heat energy in terms of specific heat energy can be calculated by using this formula:
Q= m. C. ΔT
∵ΔT= change in temperature,
ΔT=40.0-10.0°C=30°C
Now substituting the values in the above formula.
[tex]Q= 8.0*0.384*30=92.16J[/tex]
Hence, 92.16 J energy will be absorbed by a copper sample.
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