Answer:
B
disappears
Explanation:
Bbbbbbbbbb
A metal sample weighs 57.3g and has volume of 6.3mL what is the density of the sample
Answer:
9.10 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{57.3}{6.3} \\ = 9.095238...[/tex]
We have the final answer as
9.10 g/mLHope this helps you
What is the correct energy transformation in a hydropower dam?
well
(Sorry for the bad Quality it’s the Computer) PLEASE HELP MEEEE
Answer:
Gravitational to Mechanical to electrical
Explanation:
In a hydropower dam, the gravitational potential energy is converted to mechanical energy which in turn produces electrical energy.
The gravitational potential energy is due to the water overhead and the position of water inside the dam. The height and quantity of water determines the magnitude of the gravitational potential energy. Then, this energy is released when it falls on turbines and it drives them. As the turbine moves, mechanical energy is produced. The turbine is connected through a dynamo which produces a electric current by the turning action.In which unit is the wavelength of an electromagnetic wave commonly measured?
A. J
B. nm
C. s-1
D. kg
Answer:
nm
Explanation:
trust me:)
Can someone help with 1 2 3 please I give you brainlest
Answer:
1. Option C : oppositely charged
2. Option B : positively charged
3. Option D : negatively charged
how many moles of atoms of each element in one mole (NH4)2CO3
Answer:
Chemists generally use the mole as the unit for the number of atoms or molecules of a material. One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro's number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole).\
Have a great day!!!!
Explanation:
1 mole of (NH₄)₂CO₃ has:
2 moles of N atoms.8 moles of H atoms1 mole of C atoms.3 moles of O atoms.Let's consider the chemical formula of ammonium carbonate: (NH₄)₂CO₃.
The subscripts inform us of the number of moles of atoms in 1 mole of molecules.
Nitrogen has 2 subscripts: "1" (which is not written) and "2" (outside the parenthesis). The global subscript for nitrogen is obtained by multiplying both subscripts.
[tex]N: 1 \times 2 = 2[/tex]
Hydrogen has 2 subscripts: "4" and "2" (outside the parenthesis). The global subscript for nitrogen is obtained by multiplying both subscripts.
[tex]H: 4 \times 2 = 8[/tex]
The subscript for carbon is "1".
The subscript for oxygen is "3".
1 mole of (NH₄)₂CO₃ has:
2 moles of N atoms.8 moles of H atoms1 mole of C atoms.3 moles of O atoms.Learn more: https://brainly.com/question/375587
Fe + CuCl2 → FeCl2 + Cu
The type of reaction represented by the above equation is -
decomposition
synthesis
single-replacement
double-replacement
Answer:
the type is single replacement
The given reaction equation represents a single-replacement reaction.
Explanation:
A chemical reaction is defined as the rearrangement of the atoms of a substance to give a new substance as a product.A decomposition reaction is a type of chemical reaction in which a substance breakdowns into two or more than two simpler substances.ABC→ A+B+C
A synthesis reaction is a chemical reaction in which two or more compounds are combined together to form a single compound.A+B+C → ABC
A single-replacement reaction is defined as the chemical reaction in which an element replaces another element from its compound.AB+ C → AC + B
A double-replacement reaction is defined as the chemical reaction in which ions of compounds are exchanged.AB+ CD → AC + BD
Given:
[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]
To find:
The type of chemical reaction represented by the given equation.
Solution:
In the given reaction:
[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]
Iron is replacing copper from its compound which is copper(II) chloride to give iron(II) chloride and copper as a product.
So from this, we can conclude that the given reaction equation represents a single-replacement reaction.
Learn more about types of chemical reactions here:
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5.00 ml of an H2SO4 solution with unknown molarity was diluted with 25.00 ml. This was tirated with 15.00ml of .1000 M NaOH to reach the equivalence point. What is the molarity of the original unknown H2SO4 solution? Also, what would the balanced chemical equation for this reaction be?
Answer:
0.1500 M
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
Explanation:
The balanced chemical equation is:
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂OFirst we calculate how many NaOH moles reacted, using the volume and concentration:
15.00 mL * 0.100 M = 1.5 mmol NaOHThen we convert NaOH moles into H₂SO₄ moles:
1.5 mmol NaOH * [tex]\frac{1mmolH_2SO_4}{2mmolNaOH}[/tex] = 0.75 mmol H₂SO₄This amount of H₂SO₄ moles was originally contained within 5.00 mL of solution, thus the molarity is:
0.75 mmol H₂SO₄ / 5.00 mL = 0.1500 MHow many double covalent bonds can form with a hydrogen atom
answer: covalent bonds
balance the chemical equation KC1O3→KC1+O2
Answer:
2 KCO3 → 2 KC + 3 O2
Explanation:
Reaction Type
Decomposition
Reactants
KCO3
Products
KC
Dioxygen - O2
O₂ Oxygen Molecular Oxygen Diatomic Oxygen Triplet Oxygen Oxygen Gas Liquid Oxygen LOx
6. If you 5.5 mol of Nitrogen in: N2 + 3H2 → 2NH3
a. How many moles of Hydrogen are needed to completely react with the nitrogen?
b. How many moles of Ammonia will be produced?
Answer:
Therefore 9 moles of nitrogen are required to produce 18 moles of ammonia.
____________ sedimentary rocks form from the remains of living things.
a.
organic
c.
detrital
b.
chemical
d.
foliated
Answer:
I believe the answer is A. Organic.
Hope it helps!
Answer:
Organic
Explanation:
living things are organic, so chemical is wrong, detrital is when rocks form from broken down rocks left behind, again not from living things so that's also wrong, that leave Organic and foliated, foliated makes no sense which leave only Organic, so organic will be your answer
Sodium chloride (NaCl) can be broken down to produce
pure sodium (Na) and chlorine gas (CI).
Which equation represents this chemical reaction?
A. 2NaCl + Cl2
2Na
B. 2NaCl + 2Na
Cl2
C. 2Na
2NaCl + Cl2
D. 2Naci - 2Na+ Cl2
Answer:
Explanation:
B
Answer:
Explanation:
It D I’m taking it right nowwww
Two waves were analyzed with some high-tech instrumentation. The first wave was found to have a wavelength of 3 x 10 m and the second wave had a wavelength of 3 x 10 m. Which wave would have a higher frequency? Explain
Explanation:
The first wave was found to have a wavelength of 3 x 10⁵ m and the second wave had a wavelength of 3 x 10⁴ m
We need to find which wave have a higher frequency.
The relation between frequency and wavelength is given by :
[tex]c=f\lambda[/tex]
Let f₁ and f₂ be the frequency of wave 1 and wave 2.
[tex]f_1=\dfrac{c}{\lambda_1}\\\\f_1=\dfrac{3\times 10^8}{3\times 10^5}\\\\=1000\ Hz[/tex]
And
[tex]f_2=\dfrac{c}{\lambda_2}\\\\f_2=\dfrac{3\times 10^8}{3\times 10^4}\\\\=10000\ Hz[/tex]
Hence, the wave having less wavelength will have higher frequency. The wave having wavelength 3 x 10⁴ m will have higher frequency.
A student drops a rubber ball from a height of 100cm and draws a diagram to show the path of a bouncing ball. Describe the energy transformation that occurs as the ball goes from position A to E. Include the words kinetic energy and potential energy in your explanation.
Picture is down below.
Answer:
hjgihgvoj
Explanation:
NEED HELP ASAP!!! I just need to know the order
Determine the number of hydrogen atoms in an alkyne with one carbon–carbon triple bond and 4 carbon atoms.
number of hydrogen atoms: ?
Answer:
There are 6 hydrogen atoms.
Explanation:
The formula for an alkyne that has only one triple bond is as follows:
CₙH₂₍ₙ₎₋₂Where n is any natural number greater than 2.
For this problem, n=4. This would mean the formula is:
C₄H₂₍₄₎₋₂Thus
C₄H₈₋₂C₄H₆Thus the answer is 6, there are 6 hydrogen atoms.
(6
32. Calcium carbide, CaC2, is an important preliminary chemical for industries producing
synthetic fabrics and plastics. CaC2 may be produced by heating calcium oxide with
CaO + C CaC2+CO
What is the mass of CaC2 which can be produced from the reaction of excess calcium oxi
10.2 g of carbon? (Hint: Balance the equation first)
Answer:
18.1 g
Explanation:
Step 1: Write the balanced equation
CaO + 3 C ⇒ CaC₂ + CO
Step 2: Calculate the moles corresponding to 10.2 g of C
The molar mass of C is 12.01 g/mol.
10.2 g × 1 mol/12.01 g = 0.849 mol
Step 3: Calculate the moles of CaC₂ produced from 0.849 moles of C
The molar ratio of C to CaC₂ is 3:1. The moles of CaC₂ produced are 1/3 × 0.849 mol = 0.283 mol
Step 4: Calculate the mass corresponding to 0.283 moles of CaC₂
The molar mass of CaC₂ is 64.10 g/mol.
0.283 mol × 64.10 g/mol = 18.1 g
Joshua wants to create something to put between a hot pot and a table, so he doesn't burn the table. He
knows he needs to choose a material that does not conduct heat well. Which material would be the best for
him to choose?
A. Wood
B. Aluminum
C. Copper
D. Glass
The following reaction occurs in a car’s catalytic converter.
2 upper N upper O (g) plus 2 upper C upper O (g) right arrow upper N subscript 2 (g) plus 2 upper C upper O subscript 2 (g).
Which answer best describes the reducing and oxidizing processes in this reaction?
NO and CO are both reducing agents.
NO and CO are both oxidizing agents.
The oxidation state of nitrogen in NO changes from +2 to 0, and the oxidation state of carbon in CO changes from +2 to +4 as the reaction proceeds.
The oxidation state of nitrogen in NO changes from 0 to +2, and the oxidation state of carbon in CO changes from +4 to +2 as the reaction proceeds.
Answer:
The oxidation state of nitrogen in NO changes from +2 to 0, and the oxidation state of carbon in CO changes from +2 to +4 as the reaction proceeds.
Explanation:
In the catalytic converter, the oxidation number of nitrogen in NO changes from +2 to 0, and of carbon in CO changes from +2 to +4 as the reaction proceeds. Thus, option C is correct.
What is a catalytic converter?The catalytic converter is a device used in vehicle exhaust to reduce the emission of toxic gas. The reaction in the device occurs to convert the nitric oxide into oxygen and nitrogen.
The redox reaction is given as,
2NO(g) + 2CO(g) → N₂(g) + 2CO₂(g)
In the reduction half of the reaction, the electrons are lost (addition of oxygen) like in carbon monoxide the oxygen is added that changes the number from +2 to +4. CO is a reducing agent that oxidized the carbon atom.
In the reduction half of the reaction, the oxygen is removed (electrons are added) and is shown by NO where the oxygen was lost to form N₂ with oxidation +2 to 0.
Therefore, option C. NO is a reducing agent that reduced nitrogen in the reaction.
Learn more about catalytic converters here:
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The average speed of an oxygen molecule is 6.14 x 104 cm/sec at a certain temperature. What is the average speed of a CO2 molecule at the same temperature? (molar mass O2 = 31.9988; CO2 = 44.0098)
Answer:
the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
Explanation:
The computation of the average speed of a [tex]CO_2[/tex] is as follows:
[tex]\sqrt{average} = \sqrt{\frac{8 RT}{\pi M} }[/tex]
where,
M = Molar mass
[tex]V_{av} = \frac{\sqrt{1}}{M}[/tex]
Given that
[tex]V_{av} \ of\ oxygen= 6.14 \times 10^4 cm/s[/tex]
The molar mass of oxygen i.e. (MO_2) = 31.9988 g/mol
And, the molar mass of CO_2 is 44.0098 g/mol
Now
[tex]\frac{V_{av} CO_2}{V_{av} O_2} = \frac{\sqrt{M_{O2} }}{M_{CO2}}[/tex]
Now place these values to the above formula
[tex]\frac{V_{av}CO_2}{6.14\times 104 cm/s} = \frac{\sqrt{31.9988} }{44.0098}[/tex]
So,
V_av CO_2 is 5.24 × 104 cm/s
hence, the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
A fruit juice has a very sour taste. What does this most likely indicate?
A. The juice is a metal
B. The juice is a salt
C. The juice is an acid
D. The juice is a base
Explanation:
its hard its either B or C i dont wanna be wrong;-;
Answer:
The Juice wouldnt be a metal, Salt isnt that effective in juice if you have sensitive tastebuds. Your answer is C. THe Juice is an acid
Explanation:
If a cell has waste it needs to store, it will store it:
Answer:
The vacuole is the storage area of the cell. Most cells have one large vacuole. Vacuoles store food and other materials needed by the cell. They can also store waste products.
Explanation:
a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber. When all the sarcomeres in a muscle fiber shorten, the fiber contracts
Answer:According to the sliding filament theory, a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber.
Explanation:
No need for an explanation if i just answered it
An atom of which element has the strongest attraction for the electrons in a bond?
a. aluminum
b. carbon
c. chlorine
d. lithium
Answer:
chlorine
Explanation:
This is because the electronegativity increases from left to right and decreases from top to bottom of the periodic table.
Which of the following physical properties is NOT characteristic of a metal?
A.Malleable
B.Solid at room temperature
C.Dull in color
D.Good conductors
Aluminum metal reacts with oxygen gas to form solid aluminum oxide written into a chemical equation
Answer: Al2O3
Explanation:
Determine what kind of diet this animal has by examining its teeth.
Carnivore
Omnivore
Herbivore
Vegan
Answer:
That animal is a Carnivore.
Explanation:
The skull is that of a Panther which is a carnivore. Hope this helps
PLEASE HELP! (IM GIVING BRAINLIEST) Which of the following is a monatomic cation?
A.) NH4+
B.) SO4 -2
C.) Fr+
D.) Br-
Answer:
C. Francium
Explanation:
Bromine is diatomic, and A + B are polyatomic ions. C is the right answer
Answer:
Fr^+
Explanation:
took the test
Can someone help me please
What is the mass % of acetone in a 1.77 M solution of acetone (MM = 58.08 g/mol) in water? The density of the solution is 0.971 g/mL.
Answer:
[tex]\%m/m=10.6\%[/tex]
Explanation:
Hello!
In this case, since the by-mass percent is defined by:
[tex]\%m/m=\frac{m_{solute}}{m_{solution}} *100\%[/tex]
Thus, since the given 1.77 M solution is given in terms of mol/L, we need to compute the mass of acetone via its molar mass and the volume of solution in L to g via the density:
[tex]\%m/m=1.77\frac{mol}{L}*\frac{58.08g}{1mol}*\frac{1L}{1000mL}*\frac{1mL}{0.971g} *100\%\\\\\%m/m=10.6\%[/tex]
Best regards!