Answer:
R=0.0564g K2SO4
the sun has the same diameter as jupiter?
A compound has the following composition by mass:
32% carbon, 6.7% hydrogen, 42.6% oxygen and 18.7% nitrogen
What is the empirical formula of the compound?
Answer:
i cry when im alone
Explanation:
HELPPPP . what is this
I'll be honest I'm guessing,
but maybe D
The forces that hold atoms together in an element determine its
F. conductivity
G.melting temperature only
H.hardness only
J.melting temperature and hardness
if you know any answer to this pls help out I'll give brainiest plus a lot of points
Answer:
I cant see it clearly
Explanation:
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U
Question 13
4 pts
Using the formula Na + Cl2 --> NaCl, if 3.93 moles of chlorine are combined
with excess* sodium, how many moles of sodium chloride will be made? Note
that in this question, excess means extra or as much as you need.
Answer:
7.86 moles of sodium chloride are produced.
Explanation:
Given data:
Moles of chlorine = 3.93 mol
Amount of sodium = excess
Moles of sodium chloride formed = ?
Solution:
Chemical equation:
2Na + Cl₂ → 2NaCl
Now we will compare the moles of sodium chloride with chlorine.
Cl₂ : NaCl
1 : 2
3.93 : 2×3.93 = 7.86
Chlorine is limiting reactant that's why we compare the NaCl with only number of mole of chlorine.
Thus, 7.86 moles of sodium chloride are produced.
What two particles are found in the nucleus of an atom?
Answer: it has one proton and electron
Explanation:
Which characteristic BEST identifies a pure substance?
a. shape
b. texture
c. melting point
d. state of matter
Whoever helps I will give BRAINLIEST
What happens when water turn’s into gas
Answer:
The process of turning water into gas is called evaporation. When water is heated, it changes state from a liquid to a solid. No mass is destroyed during the process, but rather, it is converted into gas.
Explanation:
Brainliest Plzzz!!!
What is the definition of the word: Property (the scientific definition A makes up matter; makes up the world around us B an object or diagram C something that can be observed about a substance D to change the position of something HEalPPPPPPpPP
Answer:
i feel like the answer is A
An object that is 0.5 m above the ground has the same
amount of potential energy as a spring that is stretched
0.5 m. Each distance is then doubled.
How will the potential energies of the object and the
spring compare after the distances are doubled?
O The gravitational potential energy of the object will
be two times greater than the elastic potential energy
of the spring.
O The elastic potential energy of the spring will be four
times greater than the gravitational potential energy
of the object.
The elastic potential energy of the spring will be two
times greater than the gravitational potential energy
of the object
O The potential energies will remain equal to one
another
The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Answer:
C.) The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.
Explanation:
Hope this helps! Sorry if I am wrong. ;-;
Which of the following is an example of a reaction that you've seen in your everyday life?
Question 5 options:
Ice melting
Salt dissolving
Water freezing
Fire burning
Answer:
water freezing
Explanation:
i think so
Determine a piece of copper with a volume of 100 cm power 3 has a mass of 890 g. Explain how you could use this information to find out how much mass would be in 13 cm power 3 of copper
Earth is a single interconnected system. True False
Answer:
True
Explanation:
Earth is a single interconnected system but it can be subdivided into smaller systems.
How many C atoms are there in a sample of C,H, that contains 6.59 x 1026 H atoms?
A. 1.98 x 1027 C atoms
B. 2.47 x 1026 C atoms
C. 4.94 x 1026 C atoms
D. 3.17 x 1024 C atoms
Answer:
bill gates
Explanation:
Stomach acid is predominately hydrochloric acid. Write the balanced chemical equation for the neutralization reaction between HCI and the active ingredient.
Express your answer as a chemical equation. Identify all of the phases in your answer
Answer:
HCl + Mg(OH2) ---> MgCl2 + H2O
Explanation:
hydrochloric acid + magnesium hydroxides ==> magnesium Chloride (a salt) + Water
HCl + Mg(OH2) ---> MgCl2 + H2O
What is one way the lack of gravity in space affects the human body?
Please help ASAP
Answer:
Loss of muscle mass because there is no weight on the back and legs.
Explanation:
What is the most likely reason a computer model is used for a black hole?
Answer:
Black holes are merely the most exotic example of the general principle that ... quantum computer stores bits on protons and uses magnetic fields to flip them. ... Powered by Standard Model software, the universe computes
Explanation:because they are mostly exotic
ARE MINERALS man-made?
Answer:
no
their made from the earth
How many atoms of each element are in 4Na3PO4?
Answer:
12 sodium 4 phosphorus 16 oxygen. makes the table below to determine the number of atoms of each element in the chemical formula 4Ca(ClO3)2.
A testable explanation of or answer to a scientific question that is based on prior knowledge or research is a(n)
Answer:
the answer is HYPOTHESIS your welcome
Explanation:
can someone please help me
30 points!! please help chem question
the state of y at room temperature is gas, good luck!
Please help, I will give brainliest
What happens to the electrons when an electric field is applied?
When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor
Explanation:
When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor
What is an individual living entity called?
tissue
cell
organism
organ
Answer:
it is organism the third one
The image below shows uncharged particles bouncing around.
State of Matter
Which state of matter is most likely represented in the image? (5 points)
Gas
Solid
Liquid
Plasma
This problem is providing information about the states of matter and a given diagram showing a molecular arrangement it has. Thus, we can start off by analyzing the attached file, which shows molecular arrangements and movements each state exhibits.
Solids are quite organized so that they are able to form molecular networks in which molecules vibrate but do not displace anywhere. Liquid molecules are close enough to have small movements and vibrations but are not able to form any organized network.
Gases, however, exhibit no molecular organization but large movements inside the container whose walls the gas constantly crash against. Plasma do not have any order neither yet it contains ions.
In such a way, since the given diagram do not have any apparent order or ion, we infer this is about a gas that moves into the container and crash against its walls.
Learn more:
https://brainly.com/question/18538345https://brainly.com/question/9402776PLEASE HELP ME ASAP!!!!!! i hope you can see this!!! if you do this can you please show your work
Answer:
3.83%
Explanation:
First, find the average of the measured value. You should get 286.
291 + 287 + 295 + 281 = 1154
1154/4 = 288.5
Subtract the accepted value (300) from the average measured value (286). Take the absolute value of your answer. You should get 14.
288.5 - 300 = -11.5 = 11.5
Divide the difference from the above problem (14) by the accepted value (300). You should get 0.0467.
11.5/300 = 0.0383
Multiply by 100%.
0.0383 × 100% = 3.83%
The percent error is 3.83%.
Answer:
3.83 percent
Explanation:
Accepted Value = 300 degrees celsius
So since we are given the formula for percentage error,
we know that we have to find the average measured value since the accepted value is already provided
Average Measured Value:
Sum of all measured values / number of measured values
(291 + 287 + 295 + 281) / 4
1154 / 4
288.5 degrees celsius
Now, plugging the values in the given formula:
(average measured value - accepted value) *100 / accepted value
(288.5 - 300) * 100 / 300
-1150 / 300
-3.83 percent
Taking Absolute Value:
3.83 percent
Hence, the average value of the temperature is 3.83 percent less than the accepted value
14)
A Kelvin temperature equivalent to 25°C is:
A)
-248K
B)
25K
C)
248K
D)
298K
Answer:
25°C + 273.15 = 298.15K , so D.) is the Answer
Explanation:
Use the solubility rules from the Lab 4 introduction and your knowledge of qualitative separation schemes from the lab to answer the following questions.
The qualitative analysis experiment you did is actually an abbreviated version of a much larger analysis scheme in which many different cations are separated and identified. Suppose a mixture contains Ag+, K+, NH4+, Hg22+, Pb2+, Mg2+, Sr2+, Ba2+, Cu2+, Al3+ and Fe3+.
(a) Which of the following ions could you separate, by causing them to precipitate, with the addition of HCl? (Hint: HCl is a source of chloride ions. Select all that apply.)
Ag+ K+ NH4+
Hg22+ Pb2+ Mg2+
Sr2+ Ba2+ Cu2+
Al3+ Fe3+
(b) After the addition of HCl, the above sample is centrifuged and decanted. Which of the following cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2SO4? (Hint: H2SO4 is a source of sulfate ions. Select all that apply.)
Ag+ K+ NH4+
Hg22+ Pb2+ Mg2+
Sr2+ Ba2+ Cu2+
Al3+ Fe3+
(c) After the addition of H2SO4, the above sample is centrifuged and decanted. Which of the following cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2CO3? (Hint: H2CO3 is a source of HCO3− and carbonate ions. Select all that apply.)
Ag+ K+ NH4+
Hg22+ Pb2+ Mg2+
Sr2+ Ba2+ Cu2+
Al3+ Fe3+
(d) Choose one of the cations above and write the net precipitation reaction that occurs. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)
Cu2+(aq) + (CO3)2-(aq) → CuCO3(s)
Your answer contains an improperly or incompletely formatted chemical formula. Your answer contains improper superscript or subscript
Answer:
Explanation:
a ) silver chloride AgCl and lead chloride PbCl₂ Hg₂Cl₂ , are not dissolved in ware
so Ag⁺ and Pb⁺² Hg₂ ⁺² will precipitate out .
b ) BaSO₄ , SrSO₄ are insoluble
Ba⁺² and Sr⁺² will precipitate out .
c )
Al₂( CO₃)₃ , Fe₂(CO₃)₃ , CuCO₃ insoluble .
Al⁺³ and Fe⁺³ and Cu⁺² will be insoluble .
d )
2Fe⁺³(aq) + 3CO₃⁻²(aq) = Fe₂(CO₃)₃ (s)
