Answers
Answer:
The sun or producers.
Related Questions
The large number before a molecule in a chemical formula is called a _______________.
O subscript
O coefficient
O equation
Answers
Answer:
Subscript
Explanation:
The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound. When balancing an equation, you can change the coefficients but not the subscripts.
hope this helps! if not, it's got to be coefficient or equation
You are melting a chocolate and accidentally have the stove up to high. the chocolate starts to burn on the bottom of your pot. Physical or Chemical Change?
Answers
Answer:
it is a chemical change because it can't be change back to it normal position when it gets burnt
For a solution, [H+] = 3 x 10-11M.
What is the pH?
Answers
Answer:
pH≈10.5
Explanation:
-log(3 x 10-11)≈10.5
What is the percent composition (by mass) of MgBr2?
Answers
Answer:
13.2% Mg, 86.8% Br
Explanation:
Mg has a molar mass of 24.31g/mol.
Bromine has a molar mass of 79.90 g/mol.
There is one mole of Mg and two moles of Br in the compound:
79.90x2 + 24.31 = 184.11
So the total molar mass of MgBr2 is 184.11.
A percent tells us a part of a whole, so we will divide each part of the mass into the whole mass.
24.31g Mg / 184.11g MgBr2 = .132
159.8g Br / 184.11g MgBr2 = .868
Multiply these decimals by 100 to make them into a percent.
.132 x 100 = 13.2% Mg
.868 x 100 = 86.8% Br
The core of earth is made of iron and nickel the outer core is so hot that it melts metal. The inner core is solid. What causes these diffrences
Answers
Answer:
The inner core is solid by intense pressure of all the layers above it.
Explanation:
The inner core is made up of heavy elements such as iron and nickel. It therefore possesses an unusually high pressure that makes the expanded inner core which arose from effects of high temperature to be nullified.
Thus, we can say that the inner core is solid by intense pressure of all the layers above it.
help please see attached file
Answers
Answer:
balanced equation of glucose
6CO2 + 6H2O----------C6H12O6 + 6O2
in the presence of sun light.
4. Explain how radioactive isotopes are used to detect health problems.
Answers
Consider the redox reaction below. Upper M g (s) plus Pper f e superscript 2 plus (a q) right arrow upper M g superscript 2 plus (a q) plus upper F e (s). Which equation is a half reaction that describes the reduction that is taking place?
Answers
Answer: [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]
Explanation:
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
[tex]Mg(s)+Fe^{2+}(aq)\rightarrow Fe(s)+Mg^{2+}(aq)[/tex]
The oxidation half reaction is:
[tex]Mg(s)\rightarrow Mg^{2+}(aq)+2e^-[/tex]
The reduction half reaction is:
[tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]
Answer:
A
Explanation:
edge
If the [H3O+] of a solution is less than the [OH-], what can be said about the solution?
(A) The solution would have a higher pH than its pOH.
(B) The solution could still have a neutral pH.
(C) The solution would have a higher pOH than its pH.
(D) The solution would be basic only if the solution contained a weak acid.
Answers
Answer:
I was looking for this same answer.
Explanation:
If the [H₃O⁺] of a solution is less than the [OH⁻], then the solution would have a higher pH than its pOH.
How pOH is define?pOH is define as the negative logarithm of the concentration of OH⁻ ion and for a basic solution its value should be less than 7.
In the question it is clear that concentration of H⁺ ion is les than the concentration of OH⁻ ion, so the given solution is basic in nature. Basicity of basic solution is calculated by using the pOH scale and for this solution value of pOH is less than 7, because more than 7 shows the acidic character. And according to the pH scale value of this solution should be more than 7.
Hence, option (A) is correct i.e. The solution would have a higher pH than its pOH.
To know more about pOH scale, visit the below link:
https://brainly.com/question/854299
Which answer choice describes all nonmetals? A. All of the elements of Period 2 in green boxes B. Hydrogen and all of the other elements in orange boxes C. All of the elements of Group 18 in orange boxes D. Hydrogen and all of the elements in blue boxes
Answers
An answer is the group of reactive nonmetals and Noble gases.
I am not sure what the colored boxes mean, referring to my periodic table. However, the nonmetals are Hydrogen, Carbon, Nitrogen, etc., including the Noble gases.
Green and purple below, then hydrogen of course.
50g of potassium chloride is dissolved in 500 cm3 of water. Calculate the concentration of the solution. Give your answer in g/dm3
Answers
Potassium manganate(VI), K2MnO4, can be made to react with water,
forming potassium permanganate, KMnO4, potassium hydroxide,
KOH, and hydrogen gas. This reaction is used in industry to produce
potassium permanganate, which is widely used in analytical chemistry.
Write the balanced equation for this reaction
Answers
Coefficients are in parentheses and subscripts are just normal letters
which situation best represents convection
Answers
Answer:
A hot air balloon taking off
Explanation:
Are viruses alive. What makes something alive?
Statement: No cell membrane or other organelles.
Statement: Most viruses do not have the fools to copy their own DNA
Statement: Outside of a host cell viruses do not use energy.
Statement: viruses don't appear to have active processes that respond to the environment
what
Answers
A mixture of four gases exerts a total pressure of 960
mm Hg. Gase A each exert 120 mm Hg. Gas B exerts
50 mm Hg. What pressure is exerted by gas C?
Answers
Omitted question:I think you mean Gas A and D each exert 120 mm Hg, if Gas D has a different value , just lug it into he equation as shown below and solve.
Answer:Gas C= 670mmHg
Explanation:
According to Dalton law of partial pressure
The total pressure of a mixture of gases is the sum of the pressures of each gas and can be illustrated as
Pressure total=P1+P2+… +Pn.
Total Pressure = Gas A + Gas B + Gas C + Gas D + Gas...
Now we have
Total Pressure = 120 mm Hg + 50mm Hg + Gas C + 120 mm Hg
960mmHg = 120 mm Hg + 50mm Hg + Gas C + 120 mm Hg
960mmHg =290mmHg +Gas C
Gas C =960mmHg -290mmHg
Gas C= 670mmHg
Which is an example of a double
replacement reaction?
2Na+ Cl2 + 2NaCl
H2SO3 → H20 + S02
2K + 2H20 – 2KOH + H2
NaCl + AgF-NaF + AgCI
Answers
NaCl + AgF-NaF + AgCI
Which one of the following compounds is insoluble in water?
a) Na2CO3
b) K2SO4
c) Fe(NO3)3
d) ZnS
Answers
Answer:
The answer is Na2CO3.Option a
What is the charge of the atom in the diagram below?
A. -3
B. +1
C. 0
D.+3
Answers
Answer:
D. +3
Explanation:
have a wonderful day!!
Density can be dasdied as a
A physical property of matter
B. chemical property of matter
C. physical change
D. chemical change
Answers
Answer:
A
Explanation:
physical property of matter
- no chemical reaction involved
- involves the measurements of mass and density
Which of these do NOT show malleability a) Iron
b) Sulfur
c) Copper
d) Aluminum
Answers
Answer:Sulfur
Hope this helps!
Explanation:
Write a balanced equation for the complete combustion of propane gas, C3H8, with
oxygen, O2, to form carbon dioxide, CO2, and water, H2O?
Answers
Answer:
Explanation:
Balancing Carbon atoms on the right side,
Balancing Hydrogen atoms on the right side,
Balancing Oxygen atoms on the left side,
The reactants are on the left side of the reaction:
Propane and oxygen are the reactants.
The products are on the right side of the reaction:
Carbon dioxide and water are the products.
forgive me if im incorrect or leaving things out
Determine the representative particles of
0.075 mol Ti
2.10 mol CO2
Answers
Answer:
0.o75 mol Ti = 4.5x10∧22
2.10 mol CO2 = 1.26x10∧24 molecules
hope this helped
can someone pls help me answer e-j given the instructions above, thank youu
Answers
Answer:
e. Not balanced C and O
f. Balanced
g. Balanced
h. Unbalanced Al and O
i. Balanced
j. Balanced
Second part
a. 2
b. 2 and 2
c. For O is 5 while H20 is 4
Explanation:
Please mark as brainliest
4. The volume of a gas is 2.5 L when the pressure is at standard pressure (101.325 kPa). What is the
volume of the gas if the pressure decreases to 85 kPa and the temperature of the gas if the pressure is constant?
Answers
Answer:
18.32L
Explanation:
sana makatulong
Savvas Realize. Investigation 8 Experiment 1
Answers
Answer:
–1065.25 KJ of energy.
Explanation:
From the question given above, the following data were obtained:
4FeO + O₂ —> 2Fe₂O₃ ΔH = –560.66 kJ
From the balanced equation above,
The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.
Finally, we shall determine the amount of heat energy released when 3.8 moles of Fe₂O₃ are produced. This can be obtained as follow:
From the balanced equation above,
The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.
Therefore, the formation of 3.8 moles of Fe₂O₃ will release
= (3.8 × –560.66)/2 = –1065.25 KJ of energy.
Thus, –1065.25 KJ of energy is released from the reaction.
This is agree or disagree I need help ASAP!!
Answers
is Radon an elementary substance or a compound?
Answers
Answer:elementary substance
Explanation:
If you have 730 moles of a gas at 304 Kelvin in a 4.50 Liter container what
is the pressure of that eas in atmospheres?
Answers
Answer:
4046atm
Explanation:
For this question you can use the ideal gas law,
[tex]PV=nRT[/tex]
Where P is pressure, V is volume, n is moles of substance, R is the constant, and T is the temperature.
Because of the units given, R will equal .08026[tex]P=4046 atm[/tex]
Rearrange the equation to solve for pressure:[tex]P=\frac{nRT}{V}[/tex]
Then, plug in the values (I'll be excluding units for simplicity, but they all cancel out for pressure in atm):
[tex]P=\frac{(730)(.08206)(304)}{4.5}[/tex]
This will give you:
[tex]P=4046atm[/tex]
Your opinion on chocolate
What is your opinion on chocolate, any kind like white chocolate dark, etc. also what do you think is the bad side of chocolate?
Answers
Answer:
Milk Chocolate
Explanation:
Some chocolates contain lots of sugar, but for Dark chocolate its healthy
Answer:
Milk chocolate the bad side of chocolate is getting fat
Explanation:
have u ever tried shreks snickers before?
A student makes observations about a piece of copper. Which
observation describes a chemical property of the copper? (*hint: anything
relating to "measurements" of something is a physical property) *
A. it has a mass of 63.546 grams
B. corrosion occurs when it is exposed to air
C. it has a density of 8.96 g/cm^3
Answers
Answer: b
Explanation: