Answer:
you pick it up with gloves and make minimal contact with it
what is Radio Waves and its defonation
Answer:
radio waves are the sound waves that are produces by a radio
Explanation:
stars evolve and change over time, what is something else on earth that changes over time? describe the similarities and differences
Answer:
Trees change over time.
Explanation:
In the summer, trees thrive on the nutrients the sunlight gives them. In the winter, their leaves change colors and they start to perish. Then, with a little bit of sunlight ad water, they can thrive again. Stars also start to perish at some point, but they do not thrive again. They continue perishing until they implode.
If the number of hawks increases, the cricket population would most likely
Plant --> Cricket --> Frog --> Snake --> Hawk
•decrease
•remain the same
•increase
Answer:
Increase
Explanation:
The amplitude of a wave is it's _________ or energy
IF A CAPPED GLASS BOTTLE IS THROWN INTO A FIRE, WHAT WILL HAPPEN TO THE BOTTLE AND WHY?
Answer:
it will explode (not intensely) there is some oxygen in the bottle so the cap would pop off violently, the longer it stays in the fire the more energy is being pent up.
Explanation:
Answer:
The bottle will increase in both temperature and pressure which will cause the bottle to crack/shatter! Hope this helps :)
Explanation:
The law of Gay-Lussac states that as temperature increases so will pressure.
Write the complementary RNA strand for the following DNA strand. TAC ACC TTG ACG
Answer:
ATG TGG AAC TGC
Explanation:
ATG TGG AAC TGC
- How many moles of S2 are needed to produce 1.50 moles of SO2 gas? S2 + 20, ----> 2802
Answer:
0.75 moles
Explanation:
S2 + 2O2 = 2SO2
From the reaction above,
We see that number of moles attached to S2 is 1 and number of moles attached to SO2 is 2.
Since we want to find how many moles of S2 are needed to produce 1.50 moles of SO2 gas
The answer is gotten by proportion;
Number of moles = 1/2 × 1.5 = 0.75 moles
Ethylene glycol (C2H6O2) is used as an antifreeze in cars. If 250 g of ethylene glycol is added to 3.00 kg of water, what is the molality? Calculate how much the freezing point of water will be lowered. The freezing-point depression constant for water is Kf = –1.86°C/m. Show your work.
Answer:
2,909 M
Explanation:
molair mass is of.ethylene is 26,04 g/mol
first you need to calculate how much mL 3 kg is. You can do this by using the density of ethylene: 1,1 g/mL.
3000 g x 1.1 = 3300 mL = 3,3 L
Next you need to calculate the amount of moles:
250 g / 26,04 g/mol = 9,60 mol
Now you can calculate the molarity:
9,6/3.3 = 2,909 M
I don't know the answer for the second question. I'm sorry.
Jamal's class is observing how different substances are affected by physical and chemical changes. What evidence might indicate that a chemical
change has occurred? Choose the three correct answers.
A. release of heat
B. change in temperature
С. color change
D. new smell
The change in color might indicating the formation of a new product. Hence, the color change indicates a chemical change.
What is chemical change ?A chemical change involves the breaking/ making or both of chemical bonds. Chemical changes results in formation of new products that have different properties and structure from the initial substances.
A physical change include change in size, shape, state etc. All phase changes such as melting, boiling, freezing are physical changes. Evolution or absorption of heat, conductivity, solubility etc are physical changes.
A change in color indicates that a new product with different color is formed in the system. Therefore, option c color change indicates a chemical change.
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i need help:((( like now pls
Answer:
I think #5 is its structure
Explanation:
Answer: The first is Genes and the second one is the structure.
Explanation:
Convert 3.01 x 1023 atoms CU to moles
The number of moles = 0.5
Further explanationGiven
3.01 x 10²³ atoms Cu
Required
moles
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Input the value :
n = N : No
n = 3.01 x 10²³ : 6.02.10²³
n = 0.5
what elements can calcium nitrate be decomposed into
Answer:
when heated to incandescence, calcium nitrate decomp into /nitrogen oxide, calcium oxide and oxygen/
Explanation:
Answer:
Explanation:
Do you mean what elements is Ca(NO3)2 made from? I think that's what you mean. Every mol of Ca(NO3) contains
Ca = 1 mol
N = 2 mols
O6 = six moles of oxygen
Write chemical name ofNH4Cl, Na2CO3.
Answer:
NH4CI
AMMONIUM CHLORIDE
NA2CO3
SODIUM CARBONATE
Structural formula for:
5 - methyl hept - 3 - enal
Answer:
draw the carbon chain is containing 6 carbon then attach the aldehyde group with edge carbon in chain then put the put double bond at 3 no. carbon
Jimmy's Chemical reaction/ Recipe for making Grilled chese sandwiches is given below: 1 slice of cheese + 2 slices of bread = 1 Grilled chese sandwich ( mole ratio is, 1:2:1) If Jimmy has the following amounts of ingredients (reactants/ reagents) : 10 slices of cheese 30 hslices of bread Answer the questions below in your submission: a) What is the limiting reagent/reactant? b) what is the excess reactant? c) True or false? The number of glilled chese sandwishes he can make is decided by the limiting reactant because it gets used up most.
Answer:
See explanation
Explanation:
We have been told in the question that the equation of the reaction is; 1 slice of cheese + 2 slices of bread = 1 Grilled cheese sandwich ( mole ratio is, 1:2:1) .
Then the reagents are 10 slices of cheese 30 slices of bread. It then follows that 10 slices of cheese should be combined with 20 slices of bread according to the mole ratio.
However, we have 30 slices of bread and 10 slices of cheese so cheese is the limiting reactant while bread is the reactant in excess.
Yes, the number of glilled chese sandwishes he can make is decided by the limiting reactant because it gets used up most.
What is a fossil?
The remains of an animal or plant preserved within a layer of rock?
A orange body of compacted ice formed over thousands of years?
The energy radiated from sun?
A change in the structure of earths surface?
Answer:
the remains of an animal or plant preserved within a layer of rock otherwise A.
A fossil is the remains of an animal or plant preserved within a layer of rock. The correct option is A.
What are fossils?Fossils are the preserved form of animals or plants that are preserved on rocks or deep in the earth's crust and did not get damaged. They are discovered in the digs that are done by paleontologists.
The bones and sometimes dry skins and hairs, and teeth are also found that are preserved. These fossils help in studying animals and plants that were present in former times.
They do not get destroyed because they are preserved in rocks and stones. We got to know about dinosaurs by their fossils. There are different types of fossils are found.
Thus, the correct option is A. The remains of an animal or plant are preserved within a layer of rock.
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How many moles of a gas sample are in a 5.0 L container at 373 K and 203 kPa?
0.33 mole
0.66 mole
1.11 moles
3.05 moles
Answer:0.33
I'm not sure tho
Answer:
0.33
I just took the test.
WILL GIVE BRAINLIEST!!! MORE THAN ONE ANSWER!!
Which of these processes are chemical reactions?
boiling an egg
crushing spices
vegetables rotting
chopping vegetables
dew forming
Answer:
Boiling a egg
vegetables rotting
Hope this helps
Explanation:
2. Hydrogen and Nitrogen
a. What kind of bond will form?
Answer:
A covalent bond
hope this helps!
which phrase best defines the term energy
Answer:
theres no options?
Explanation:
Which is a non-living feature of the environment? A. Bacteria B.sun C. Fungi D. Cow
Answer:
B. Sun
Explanation:
While what exactly qualifies as "living" can be contested when talking about viruses, bacteria, etc. It is commonly accepted that Bacteria, Fungi and Animals (Cows) are all organisms. The Sun, however is no organism.
What mass of oxygen combines with 2.81 mol
of magnesium in the reaction
2 Mg(s) + O2(g) → 2 MgO(s)?
22.48 g. mass of oxygen combines with 2.81 mol of magnesium in the reaction. For the reaction 2 Mg(s) + O2(g) → 2 MgO(s).
What do you mean by molar mass ?The term molar mass is defined as the mass of 1 mole of that particular substance and number of grams per mole of a compound.
In other words, the molar mass is the total mass in grams of all the atoms that make up a mole of a specific molecule. As a result, the molar mass units are grams/mole.
The balance chemical equation is as follows :
2 Mg(s) + O2(g) → 2 MgO(s)
The metal Mg reacts with Oxygen in a 2:1 ratio you would divide 2.81 by two.
Now, we get,
2.81 / 2 = 1.405
You would then multiply 1.405 by the molar mass of Oxygen which is 15.999
= 1.405 × 16
= 22.48 g.
Thus, 22.48 g. mass of oxygen combines with 2.81 mol of magnesium in the reaction.
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True/False: All of the elements combine in a variety of ways to make up all living and all nonliving things
Answer:
true
Explanation:
What step of the water cycle has the most direct impact on freshwater storage
Answer:
Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff.
Explanation:
HELP ASAP
Based on the image shown, write the number that
corresponds to the term or phrase. Assume that
the electrons flow counterclockwise from 3 to 2 to
1, from 5 to 4 to 5, and to 3.
3, 1, 5, 4, 3, spontaneous
How many boys are in this pedigree?
Answer:
the answer is three 3
......
How many molecules are in 0.23 moles of CaCl2?
A) 2.62 x 10^24 molecules of CaCl2
B)1.39 x 10^23 molecules of CaCl2
C) 2.61x 10^23 molecules of CaCl2
D) 3.82 x 10^-25 molecules of CaCl2
Previous
Answer:
1.39 × 10²³ molecules of CaCl₂
Explanation:
Given data:
Number of moles of CaCl₂ = 0.23 mol
Number of molecules = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
0.23 mol × 6.022 × 10²³ molecules / 1mol
1.39 × 10²³ molecules
If a plant cell is placed in a solution and the cell shrivels up, what type of solution was it placed in? How do you know?
Answer:
The cell is in a Hypotonic solution. When a cell is in a Hypotonic solution the lower osmotic pressure causing water to move across the pressure gradient into the solution causing the cell to shrivel.
Which situations will NOT increase the reactions rate of most chemical reactions?
Answer:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
Explanation:
Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants
Cyanobacteria use the process of
to produce energy, and oxygen is given off as a waste product.
Answer:
Photosynthesis utilizes water as an electron donor in cyanobacteria in general and creates oxygen as a by-product, although some can even use hydrogen sulfide, a process that occurs among other photosynthetic bacteria, such as purple sulfur bacteria. Carbon dioxide is reduced via the Calvin cycle to form carbohydrates.
