Answer:
C
Explanation:
Cyanide's formula can be found either on google on on a reference table at the "polyatomic ions" table. Hydrogen, H, has a charge of 1+ when bonded, and cyanide has a charge of 1- overall, so they will be in a one to one ratio while bonded. As such, the equation is HCN.
According to Newton's third law, the two forces in a force pair act
A. on the same object.
B. with the same force.
C. in the same direction.
Helpppppppppppppppppp!!!!!
The concentration of [OH-] -hydroxide ion : 1.2 x 10⁺⁴ M
Further explanationH₂O ionization reaction
2 H₂O ⇌ OH− + H₃O⁺
The water equilibrium constant (Kw) is the product of concentration
the ions:
Kw = [H₃O +] [OH-]
Kw value at 25° C = 10⁻¹⁴
It is known [H₃O +]=8.4 x 10⁻¹¹ M
then the concentration of [OH-] -hydroxide ion :
[tex]\tt 10^{-14}=8.4\times 10^{-11}\times [OH^-][/tex]
[tex]\tt [OH^-]=\dfrac{10^{-14}}{8.4\times 10^{-11}}=1.19\times 10^{-4}\approx 1.2\times 10^{-4}[/tex]
What energy transformation occurs in solar panels found on a roof?
Explanation:
Solar panels are visible on roof tops on homes and businesses. Solar thermal technology transforms solar energy to heat, which is then used to heat homes, businesses and even swimming pools, or transformed again into electricity.
Answer:
Solar panels are visible on roof tops on homes and businesses. Solar thermal technology transforms solar energy to heat, which is then used to heat homes, businesses and even swimming pools, or transformed again into electricity.
1. Determine the number of significant figures in the following measurements.
a. 38.7 g 3 significant figures
b. 3 486 002 kg 7 significant figures
c. 0.00013 cm
d. 0.001400 g/L
e. 9 740 000 nm/s
Answer:
2 and 4 and 3
Explanation:
in c. leading 0's are never significat. Numbers 1-9 are always significant.
d. leading 0's are never significant. numbers 1-9 are always significant. ending 0's are only significant when there is a decimal.
e. numbers 1-9 are always significant. 0's are not significant because there is no decimal.
why does H and O share electrons but NA and O transfers electrons
Identify each statement below as an example of science or pseudoscience. If food dropped on the floor is picked up within 5 seconds, it is okay to eat.
Answer:
pseudoscience
Explanation:
The term "pseudoscience" can be used to describe a single assertion or claim that is allegedly supported by facts or science but falls apart when put to the test of reason. Here the given sentence is a pseudoscience.
What is pseudoscience?A statement, discovery, or explanatory system that is presented as pseudoscience lacks the objectivity required by the scientific process. Research that is based on dubious ideas, a defective experimental design, or unreliable data can also lead to pseudoscience.
Pseudoscience may be presented in good faith due to incomplete or inaccurate data analysis. However, it is also possible to deliberately apply scientific methods incorrectly in order to instill unjustified confidence in conclusions that would not be supported by a more rigorous approach.
Many pseudosciences, like astrology, are reasonably safe. Others, nevertheless, might be employed to offer "scientific" justification for unethical behaviour.
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what is density?
-science hw
Answer:
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.
Explanation:
Hopefully that helped:/
Answer: Density, mass of a unit volume of a material substance. Hope this helps!
HELPPPP!!! I NEED HELP WITH SCIENCE
Answer:
Both are chemical changes.
Explanation:
They are chemical changes because when when you melt the sugar to make caramel a new substance is formed. The same with cookies. You don't start out with cookies, you start out with dough. And then when you cook the dough a new substance is formed which is the cookies.
What is needed for a fossil to form?
Answer: The organism generally must have hard parts such as shell, bone, teeth, or wood tissue; the remains must escape destruction after death; and the remains must be buried rapidly to stop decomposition. This does make the fossil record biased because animals with soft bodies are less likely to form fossils.
Explanation:
Which element is in the same family as Chlorine (Cl) and Fluorine (F)?
Hydrogen (H)
Lithium (Li)
Oxygen (O)
Bromine (Br)
Answer/Explanation:
Chlorine and Fluorine are in the Halogen family. The elements in the Halogen family are:
Fluorine (F)
Chlorine (Cl)
Bromine (Br)
Iodine (I)
Astatine (At)
Tennessine (Ts)
Hydrogen (H) is a nonmetal
Oxygen (O) is a nonmetal
Lithium (Li) is an alkaline metal.
Answer/Explanation:
Chlorine and Fluorine are in the Halogen family. The elements in the Halogen family are:
Fluorine (F)
Chlorine (Cl)
Bromine (Br)
Iodine (I)
Astatine (At)
Tennessine (Ts)
Hydrogen (H) is a nonmetal
Oxygen (O) is a nonmetal
Lithium (Li) is an alkaline metal.
Sebastian has a beaker of 100 ml of water and a beaker of 500 ml of water. He is trying to
determine how the boiling point will be affected by the different amounts of water. He knows
that boiling point is a physical property of matter. What can he conclude about the boiling
point of the 2 beakers of water?
A. The 2 beakers of water will have different boiling points because the boiling point of water
is a physical property and the property is independent of the amount of water.
B. The 2 beakers of water will have the same boiling points of 100 degrees Celsius because
the boiling point of water is a physical property and the property is independent of the
amount of water.
C. The 2 beakers of water will have different boiling points because the boiling point of water
is a physical property and the property is dependent of the amount of water.
D. The 2 beakers of water will have different boiling points of 100 degrees Celsius and 500
degrees Celsius because the boiling point of water is a physical property and the property
Answer:
The 2 beakers of water will have different boiling points because the boiling point of water is a physical property and the property is independent of the amount of water.
Explanation:
Got 100 on my test
The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?
No, because they have different masses.
No, because they have different volumes.
Yes, if each sample contains 6.02 x 1023 atoms.
Yes, if each sample contains 2 amu.
Answer:
c: Yes, if each sample contains 6.02 x 1023 atoms.
Explanation:
got it right on the test <3
Yes, if each sample contains 6.022×10²³ atoms. Therefore, the correct option is option C among all the given options.
What is mole?In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, and other predetermined particles. Every material has the same amount of atoms and other particles inside of a mole. The mole has the following relationship to an element's mass: One moles of carbon twelve atoms weighs 12 grammes and has 6.022×10²³ atoms.
In contrast, a mole of oxygen weighs 15.999 grammes despite having the same amount of atoms as a mole of carbon-12 by definition. As a result, oxygen is heavier than carbon. The same logic can be used to determine the weights of molecules or formulas. Yes, if each sample contains 6.022×10²³ atoms.
Therefore, the correct option is option C.
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HCOOH + MnO, CO, + Mn2+ (in acidic solution) *
Step 1: Separate the whole reaction into two half-reactions
HCOOH → CO2 MnO4- → Mn2+
Step 2: Balance the non-hydrogen and non-oxygen elements first
HCOOH → CO2 MnO4- → Mn2+
(C is balanced) (Mn is balanced)
Step 3: Balance oxygen by adding H2O(l) to the side that needs oxygen (1 O : 1 H2O)
HCOOH → CO2 MnO4- → Mn2+ + 4H2O
Step 4: Balance hydrogen by adding H+ to the side that needs hydrogen (1 H: 1 H+)
HCOOH → CO2 + 2H+ 8H+ + MnO4- → Mn2+ + 4H2O
Step 5: Balance the charges: add electrons to the more positive side (or less negative side)
HCOOH → CO2 + 2H+ 8H+ + MnO4- → Mn2+ + 4H2O
Reactants Products Reactants Products
HCOOH = 0 2H+ = +2 8H+ =+8 Mn2+ =+2
__MnO4- = -1________________________
Overall = 0 +2 +7 overall = +2
+2e- +5e-
0 +2
Step 6: Balance electrons on the two half-reactions
5[HCOOH → CO2 + 2H+ +2e-]
2[5e- + 8H+ + MnO4- → Mn2+ + 4H2O]
5HCOOH → 5CO2 + 10H+ + 10e-
10e- + 16H+ + 2MnO4- → 2Mn2+ + 8H2O
Step 7: Get the overall reaction by adding the two reaction.
5HCOOH → 5CO2 + 10H+ + 10e-
10e- + 16H+ + 2MnO4- → 2Mn2+ + 8H2O
5HCOOH + 6H+ + 2MnO4- → 2Mn2+ + 8H2O + 5CO2
Balanced Redox Reaction:
5HCOOH + 6H+ + 2MnO4- → 2Mn2+ + 8H2O + 5CO2
Draw the best Lewis structure of [(CH3)3O]+; fill in any nonbonding electrons. Calculate the formal charge on each atom other than hydrogen. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and any nonzero formal charges.
Answer:
Following are the solution to this question:
Explanation:
For [tex][(CH_3)_3O]^{+}[/tex]
Please find the attachment.
Calculating the formal charge[tex]= ve^{-} - (nb +\frac{b}{2})[/tex]
[tex]ve^{-} = valence\ electons\\\\nb=non \ bonding \ electrons\\\\b= bonding \ electrons[/tex]
Formal charge on [tex]C \ of \ CH_3 \ \ \ \ (1)[/tex]
[tex]= 4- (0+\frac{8}{2})\\\\= 4- (0+4)\\\\=4-4\\\\=0[/tex]
Similarly, the formal charge on all carbons atoms is = 0
The formal charge on O atom:
[tex]=6-(2+\frac{6}{2})\\\\=6-(2+3)\\\\=6-5\\\\=+1[/tex]
Boiling Point is the __________. *
temperature at which a liquid boils and turns to a gas
temperature at which a liquid boils and turns to a solid
temperature at which a liquid becomes warm
temperature at which a liquid freezes
a ridged steel tank filled with 62.7L of nitrogen gas of 85.0L atm
The final gas pressure : 175.53 atm
Further explanationMaybe the complete question is like this :
A ridged steel tank filled with 62.7 l of nitrogen gas at 85.0 atm and 19 °C is heated to 330 °C while the volume remains constant. what is the final gas pressure?
The volume remains constant⇒Gay Lussac's Law
When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
P₁=85 atm
T₁=19+273=292 K
T₂=330+273=603 K
[tex]\tt P_2=\dfrac{P_1\times T_2}{T_1}\\\\P_2=\dfrac{85\times 603}{292}\\\\P_2=175.53~atm[/tex]
16. Analysis of a sample of a covalent compound showed that it contained 14.4% hydrogen and 85.6% carbon by mass. What is the empirical formula for the compound?
Answer:a
Explanation:
5) Titanium (11) oxide is produced from its elements
How to balance Kmno4 + H2 So4+ CH3CH2OH-> K2So4+ mnso4 + CH3COOH + H2o by oxidation number method
Answer:
Ethanol + Potassium Permanganate + Sulfuric Acid = Acetic Acid + Manganese(II) Sulfate + Water + Potassium Sulfate
Explanation:
Electronegativity difference of F and Cl:
ionic
covalent
Answer: Electronegativity difference of F and Cl: 1.0 and is covalent
Explanation:
Answer:
1.0, covalent
Explanation:
Electronegativity difference of N and H:
0.9
covalent
Electronegativity difference of F and Cl:
1.0
covalent
This represents the composition of a substance expressed as a percent.
Answer:percent composition
Explanation:
6) Which of the following does not fall in the biotic component of the ecosystem?
a) water
b) animals c) plants
d) grass
7) The water and the mineral ions from the soil till the tip of the plant is made availab
tube like structure called ....
a. Guard cell. (6) Stomata c. Xylem d. Small hole.
8) The student peeled off a green leaf and observed it under a microscope. What sha
is expected to be seen by the students?
a) Oval
b) cylindrical
c) conical
d) rectangul
9) Lack of calcium in the diet causes....
a) Anemia b) simple goiter c) poor growth of bones and teeth
d) to
1
Answer:
6.grass
7.xylem
8.oval
9. poor growth of bones and teetn
name them pls i don't know this
Answer:
Explanation:
1. Sodium
2. Ammonium Carbonate
3. Potassium phosphate
4. Calcium sulphate
5. Zinc nitrate
6. Iron(III) oxide-hydroxide
7. Aluminium phosphate
8.Cobalt(III) Carbonate
9. Iron(II) sulfate
10. Magnesium chloride
11. Nitric acid
Answer:
1. Sodium
2. Ammonium Carbonate
3. Potassium phosphate
4. Calcium sulphate
5. Zinc nitrate
6. Iron(III) oxide-hydroxide
7. Aluminium phosphate
8.Cobalt(III) Carbonate
9. Iron(II) sulfate
10. Magnesium chloride
11. Nitric acid
Explanation:
Blonde hair is a dominant trait. (True or flase)
Answer:
False
Explanation:
Answer:
false
Explanation:
Which two properties of an object are directly related to its thermal energy?
A. Velocity and weight
B. Mass and weight
C. Velocity and temperature
D. Mass and temperature
Answer:
The answer is C
Explanation:
If we assume the sum of energy that could be obtained by absolutely transforming a unit of length, m. It is compared to the speed of light in this connection. In this case, the whole mass of the electron becomes force. In this, depending on the relation of Einstein, each electron can generate 510 keV, which is why only the option of "c" is right.
6th grade science i mark as brainliest
Answer:
60 miles
Explanation:
If the car is moving 30 mph, every hour the car has traveled 30 miles. Therefore, if the car travels for two hours, the car has traveled 60 miles if the same speed of 30 mph remained consistent.
If you wanted to know volume of water in a big bottle of soda, which
units would you use?
1. millimeters
2. kiloliters
3. liters
4. grams
If you wanted to know the volume of water in a big bottle of soda, you would use a unit known as liters. Thus, the correct option for this question is 3.
What is the volume?Volume may be defined as the amount of space occupied by a three-dimensional figure as measured in cubic units. It is generally a physical quantity of any object or substance.
As we all know that water is a liquid. So, the volume of liquid is always measured in liters. The density of water is sufficient in order to measure it in liters. While the volume of small quantity measurements like medicinal liquids is measured in milliliters.
Therefore, a liter is a unit in which the volume of water is usually measured. Thus, the correct option for this question is 3.
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Help ASAP.................
Explain why iodine will not displace bromine from seawater.
Which of these is a physical property? boiling point ,flamability, reactivity , toxicit
Answer:
Boiling point.
Explanation:
Flammability, reactivity and toxicity are all chemical properties!