Answer:
72g
Explanation:
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:
MnSO₄.7H₂OExplain 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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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:
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
What are the products?
Answer:
option 3
Explanation:
3 is the answer u get before you balance the equation
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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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
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.
advantages of artificial fertilizers?
Answer:
they improve soil texture
Explanation:
that's it helps to hold
water longer and and increase the soil bacteria and fungal activity in the soil so they do not only assist your plants , they help the soil.
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.
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
Magnesium bromide (one magnesium atom with two bromine atoms) has a
chemical formula of MgBrz. If you look at the total atomic mass of MgBr2,
does magnesium or bromine make up more of the mass?
they are exactly the same
it is impossible to tell
magnesium
bromine
Answer:bromine
Explanation:
The mass of magnesium is 24 whereas 1 bromine atom is 80 (rounded up from 79.9) and there is 2 bromine atoms which means you have to multiply 80 by 2, giving you 160.
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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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.
RIGHT ANSWERS ONLY !!!
Answer:
450.0
Explanation:
Answer:
16km
sorry if it is wrong they change things up a lot
Explanation:
What cell function produces offspring
Answer:Sexual reproduction produces offspring with novel combinations of genes
Explanation:
yes
why does decane have a higher boiling point than acetone
What is the balanced equation of Na2S+CuSO4=CuS+Na2SO4?
two students performed an investigation
Answer:
what was the investigation ???
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
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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The three properties of objects are:
Answer:
they have shape.
they have volume.
they occupy space.
Why is it important to plants and animals that photosynthesis occurs?
What is the name of the following compound?
Al4C3
-Silver carbonate
-Aluminum carbide
-Aluminum carborhte
-Silver carbide
(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:
I Need Help with this plz
Answer:
a
Explanation:
An example of an abiotic factor that would strongly affect the population of water lilies in a pond?
Answer:
temperature, light or pH
Explanation:
plz help me i swear will mark you brainiest
Answer:
C is the correct answer 35% and 9%
where do genes come form?
Answer:
im rly good with this stuff and i'm working on genetics and phenotypes and stuff.
Explanation:
information that determines your traits basically from your parents
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