Answer:
208.81
Explanation:
i think this is the answer hope this helps
I Need Help with this plz
Answer:
a
Explanation:
Activity 7 Let's Think First
Directions: Below are possible situations during an earthquake. Encircle the letter of the appropriate action.
1. If you are outside of your house, move away from the buildings.
A. I will do it
B. I will just run anywhere.
2. If you are inside your house, get cover under a table.
A. I will do it
B. I will not do it
3. If you are in a moving car, what will you say to the driver?
A. Just keep driving.
B. Please stop.
4. Drop to the ground and protect your head.
A. I will do it
B. I will not think about it.
5. Prepare a disaster emergency kit beforehand.
A. I will do it
B. I will not do it.
I NEED HELP :)
A train travels 76 miles in 1 7/12 hours. What is its average speed in miles per hour?
Answer:
48 mph
Explanation:
total time= 19/12 hr
distence- 76 miles
speed- D/T=76/19/12
which is 48mph
if my answer helps please mark as brainliest.
Answer:
pretty sure its average speed in miles per hour is 48
Explanation:
I just took 76 and divided it by 1 7/12 and got 48
What is the balanced equation of Na2S+CuSO4=CuS+Na2SO4?
(this is due tonight)
Give a real life example of something that is measured in velocity units.
Answer:
Velocity of a satellite around the earth.
Velocity of a car while driving.
Explanation:
Question 3 of 10
What is thermodynamics?
O A. The study of the transfer of hot and cold energy
B. The study of the movement of energy and heat
C. The study of kinetic energy and potential energy
D. The study of the conservation of matter and energy
Answer:
B
Explanation:
the branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.
Answer:
B
Explanation:
Why is it important to plants and animals that photosynthesis occurs?
Compare and contrast the molecular activity of solids, liquids, and gases.
Answer:
The molecules in a solid are close together and they vibrate in place. The molecules in a liquid move quickly and farther apart from eachother. The particles in a gas move freely at high speeds and slide past eachother.
Help! The question is in the picture
Answer:
little l big l big l little l
Explanation:
can you help me Complete the following sentence: After we explained why we needed her in the play, she and joined our rehearsal A quaffed B. acquiesced C vengeance D. wreaked
Explain in your own words. What does DNA mean?
Answer:
DNA aka deoxyribonucleic acid is a molecule in cells that holds genetic information. Their main job is to tell the cell what type of protein to make. The other instructions they hold for the organism is instructions on how to develop, survive and reproduce.
Explanation:
DNA is the genetic material made of two polynucleotide chains that coil around one another to create a double helix is called deoxyribonucleic acid (DNA).
All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include ribonucleic acid and DNA.
DNA is the genetic material found inside bodily cells that contribute to an individual's unique genetic makeup. Similar to the game's code or a home's blueprints, it contains the directions for creating the body.
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A reversible reaction is a reaction that takes place in the ___________________
. If the reaction were to _________________, the rate of the forward reaction would equal that of the reverse reaction.
Answer:
A reversible Reaction is a reaction that takes place in the (Reactants)
If the reaction Were to (Equal), the rate of the forward reaction would equal that of the reverse reaction
Explanation:
A reversible reaction is a reaction that takes place in the both direction.
If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.
What is reversible reaction?A reversible reaction can be identified as one in which the reactants, , as well as products, react together to return the reactants to their previous form.
What is equilibrium?The phase of chemical equilibrium occurs if both reactants, as well as products, products, are occupied in concentrations that do not alter with time.
Therefore, A reversible reaction is a reaction that takes place in the both direction. If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.
To know more about reversible reaction and equilibrium
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A 32.14 gram sample of a hydrate of MnSO4 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 17.51 grams of the dehydrated compound remained. What is the formula of the hydrate?
Answer:
MnSO₄.7H₂O
Explanation:
To solve this question, we need to convert the mass of the dehydrated MnSO₄. The difference between mass of the hydrate and dehydrated compound is the mass of water. With the mass we can find the moles of water and the formula of the hydrate:
Moles MnSO₄ -Molar mass: 151g/mol-:
17.51g * (1mol / 151g) = 0.116 moles
Moles H₂O -Molar mass: 18g/mol-:
32.14g-17.51g = 14.63g * (1mol / 18g) = 0.813 moles
The ratio of moles MnSO₄: Moles H₂O represent the amount of water molecules in the hydrate:
0.813mol / 0.116mol = 7 molecules of water.
The hydrate formula is:
MnSO₄.7H₂O
Use for questions 1-4
Zn + 2HCl → ZnCl2 + H2
1) If 0.8 moles of Zn are used,
how many moles of HCl are
required?
2) If 3.5 moles of Zn are used,
how many moles of HCl are
required?
3) If 4.8 moles of HCl are used,
how many moles of H, are
produced?
4) If 0.48 moles of ZnCl, are
produced, how many moles of
HCl are needed?
Answer: 1) 1.6 moles of HCl
2) 7.0 moles of HCl
3) 2.4 moles of hydrogen
4) 0.96 moles of HCl
Explanation:
The balanced chemical equation is:
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
According to stoichiometry :
1 mole of [tex]Zn[/tex] require = 2 moles of [tex]HCl[/tex]
0.8 moles of [tex]Zn[/tex] will require=[tex]\frac{2}{1}\times 0.8=1.6moles[/tex] of [tex]HCl[/tex]
3.5 moles of [tex]Zn[/tex] will require=[tex]\frac{2}{1}\times 3.5=7.0moles[/tex] of [tex]HCl[/tex]
According to stoichiometry :
2 moles of [tex]HCl[/tex] produce = 1 mole of [tex]H_2[/tex]
4.8 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 4.8=2.4moles[/tex] of [tex]H_2[/tex]
According to stoichiometry :
1 mole of [tex]ZnCl_2[/tex] are produced by = 2 moles of [tex]HCl[/tex]
0.48 moles of [tex]ZnCl_2[/tex] are produced by =[tex]\frac{2}{1}\times 0.48=0.96moles[/tex] of [tex]HCl[/tex]
On the periodic table, all of the cards in each row (across) have the same what?
During an experiment, four different elements were added to water and observed. Element C showed no reaction. The other three elements bubbled, with Element D bubbling with the greatest vigor and Element A bubbling the least. Which list orders the elements from least reactive with water to most reactive with water?
Answer:
In order most reactive to least reactive:
D
B
A
C
Explanation:
The reactivity series is depend on the element that reacts with the oxygen. The metal which replaces the other metal is a more reactive metal.
In the question, there are different metals and we have to find the reactivity series of the unknown metal
The series in decreasing order is as:- D > B > A > C.
In this reaction, the upper element replaces the lower elements because it is highly reactive.
Hence, the correct sequence is D > B > A > C.
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How do most cells in your body sense their surroundings?
O they touch things
O they see things
they smell things
they hear things
O all these answers are correct
can you help me with this i don't think it is that hard i just have a lot on my mind.
Answer:
Global wind
Explanation:
The jet streams go around the whole earth from west to east
Hope you have a good day :)
How much heat must be added to raise a sample of 100.g of water at 270K to 280K?
Answer:
10 Kelvin
Explanation:
this is so simple...
if you want to raise the temp from 270K to 280K just add 10K
According to specific heat capacity, 4200 joules of heat must be added to raise a sample of 100.g of water at 270 K to 280 K.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT , on substitution of values on given formula, Q= 100×4.2×10=4200 Joules
Thus, 4200 joules of heat must be added to raise a sample of 100.g of water at 270 K to 280 K.
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HELP!
A train travels 102 miles in 2 5/6 hours. What is its average speed in miles per hour?
Answer:
36miles/hour
Explanation:
speed =distance÷time taken
102miles/2 5/6
102÷17/6
102×6/17
=36miles per hour
The amplitude of a wave is the distance between a point on one wave and the identical point on the next wave T or F?
It is false that the amplitude of a wave is the distance between a point on one wave and the identical point on the next wave.
What is amplitude?The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position, as defined in physics. It is one-half of the length of the vibration path.
The energy of the disturbance that causes the wave determines the amplitude of the wave. The amplitude of a wave caused by a more energetic disturbance is greater.
A wave's amplitude is the distance from the center line to the top of a crest or the bottom of a trough.
The amplitude of a wave is the height of the wave measured from its highest point to its lowest point. The length of a wave from one peak to the next is referred to as its wavelength.
Thus, the given statement is false, as the definition is of wavelength and not of amplitude.
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To find the volume of a ring, the water displacement method was used.
What is the volume of the ring with correct significant figures?
Answer:
4 cm³?
Explanation:
68-64
An example of an abiotic factor that would strongly affect the population of water lilies in a pond?
Answer:
temperature, light or pH
Explanation:
brainiest plsss helpp
Answer:
[tex]\boxed {\boxed {\sf A. \ 19,320 \ kg/m^3}}[/tex]
Explanation:
We want to find the density. The formula is mass over volume.
[tex]\rho = \frac{m}{v}[/tex]
The mass is 500 kilograms. The volume is 0.026 cubic meters.
[tex]m= 500 \ kg \\v=0.026 \ m^3[/tex]
Substitute the values into the formula.
[tex]\rho= \frac{ 500 \ kg}{ 0.026 \ m^3}[/tex]
Divide.
[tex]\rho = 19230.7692 \ kg/m^3[/tex]
This is just about equal to 19,320 kg/m³, so choice A is correct.
Answer:
A) 19230 kg/ m3
Explanation:
divided it's mass by its volume ti get it's density
500/0.026 = 19230
A piece of substance Z is heated directly and it is found that 5805 Joules of energy are needed to raise the temperature of the substance from 25.0C to 35.0C. The specific heat of substance Z is known to be 1.28 J/gc. What was the mass in grams of this piece of substance Z?
Answer:
10.0 should be your answer
Explanation:
I have had this before unless of course they changed it
A cold can of soda is taken out of the refrigerator. It slowly warms up until it is at room temperature. Once the soda has warms up, it has more thermal energy than it had in the refrigerator. Where did this additional thermal energy come from?
Answer:
See explanation
Explanation:
We know that the thermal energy of a substance largely depends on the temperature of the body. This implies that the hotter a substance is, the greater its thermal energy and vice versa.
When you bring a cold can of soda out of the refrigerator, the molecules of air at room temperature gradually loose energy to the can and condense around it. This transfers thermal energy from the air particles to the molecules in the cold can of soda and the soda warms up pretty soon!
If you produced 50.0 moles of carbon dioxide from the complete combustion of ethanol in air, how many moles of water vapor are also produced?
hojbiuhok.
Explanation:
.;..........hv
two students performed an investigation
Answer:
what was the investigation ???
why does decane have a higher boiling point than acetone
How would adding the catalyst nitrogen monoxide (NO) affect this reaction?
2SO2(g) + O2(g) → 2SO3(g)
A.
NO increases the rate at which SO3 molecules are formed.
B.
NO reacts with SO3 to produce more SO2 molecules.
C.
NO decreases collisions between the SO2 and O2 molecules.
D.
NO increases the concentration of the SO2 and O2 molecules.
E.
NO increases the activation energy of the SO2 and O2 molecules.
Answer:
Explanation: It would be option A
Answer:
The Correct Answer is A
Explanation:
The rate increases.
WILL VOTE BEST & GIVE 20 POINTS
When completing your laboratory experiment, you placed 25.00 g of copper in the
graduated cylinder. Then you noticed the water level mark was filled to 50.0 ml. The total
mass of all the components is 58.80g. Know that the density of water is 1.0 g/ml, calculate
the density of this iron sample. Show all work.
Answer:
58.80/50= 2.352
Explanation:
kk