23
A solid is insoluble in water but dissolves in aqueous acid and in aqueous alkali without
evolution of a gas in either case. What could the solid be?
A
B.
с
D
copper(II) carbonate
copper(II) hydroxide
zinc carbonate
zinc hydroxide

Answers

Answer 1

Answer:

copper(II) carbonate


Related Questions

What determines the shape and function of a protein?

Answers

The function is determined by shape. The protein is determined by its primary structure which is the sequence of amino acids.
Amino acid sequence is determined by nucleotides in the gene (DNA)

The shape and function of a protein are primarily determined by its three-dimensional structure, which is a result of its primary, secondary, tertiary, and quaternary structures.

Primary Structure: The primary structure of a protein is the linear sequence of amino acids that make up the polypeptide chain. The sequence is dictated by the genetic information encoded in the DNA of the gene that corresponds to the protein. Each amino acid in the sequence is represented by a specific codon in the DNA, and this sequence of amino acids forms the backbone of the protein.

Secondary Structure: The secondary structure refers to the local spatial arrangement of the polypeptide backbone, which is stabilized by hydrogen bonds between amino acids. The two most common secondary structures are alpha-helices and beta-sheets. These structures are important for the stability and folding of the protein.

Tertiary Structure: The tertiary structure is the three-dimensional folding of the entire polypeptide chain, including the secondary structure elements. Various interactions, such as hydrogen bonds, disulfide bridges, ionic interactions, hydrophobic interactions, and van der Waals forces, play a crucial role in stabilizing the tertiary structure. This folding brings distant parts of the polypeptide chain close together, contributing to the unique shape of the protein.

Quaternary Structure: Some proteins are composed of multiple polypeptide subunits, and the way these subunits come together forms the quaternary structure of the protein. The interactions between the individual subunits contribute to the overall structure and function of the complex protein assembly.

Learn more about protein from the link given below.

https://brainly.com/question/33861617

#SPJ6

An octagonal pyramid ... how many faces are there, how many vertices and how many edges? A triangular prism ... how many faces are there, how many vertices and how many edges? a triangular pyramid ... how many faces are there, how many vertices and how many edges?​

Answers

Answer:

Hi Harshadvani!! These are the answers you need:

Octagonal Pyramid:

Faces - Eight (8)

Vertices - Nine (9)

Edges - Sixteen (16)

Triangular Prism:

Faces - Five (5)

Vertices - Three (3)

Edges - Eight (8)

Triangular Pyramid:

Faces - Four (4)

Vertices - Four (4)

Edges - Six (6)

Hope it helps!!

Thanks!!!☺✨

Answer:

hey there

An octagonal pyramid

8

9

16

A triangular prism

5

3

8

a triangular pyramid

4

4

6

need further explanation???

text me on the comments

How many moles are in 34.0 g of dinitrogen oxide?

Answers

Answer:

0.773 mole

Explanation:

From the question given above, the following were obtained:

Mass of dinitrogen oxide (N₂O) = 34 g

Mole of N₂O =.?

Next, we shall determine the molar mass of N₂O. This can be obtained as follow:

Molar mass of N₂O = (14 × 2) + 16

= 28 + 16 = 44 g/mol

Finally, we shall determine the number of mole in 34.0 g of dinitrogen oxide (N₂O) as follow:

Mass of dinitrogen oxide (N₂O) = 34 g

Molar mass of N₂O = 44 g/mol

Mole of N₂O =.?

Mole = mass /Molar mass

Mole of N₂O = 34/44

Mole of N₂O = 0.773 mole

Therefore, 0.773 mole is present in 34 g of dinitrogen oxide

A decomposition occurs when you open a can or bottle of soda. Carbonic acid,H2CO3, is in carbonated beverages. It decomposes into carbon dioxide and water. If you leave an open soda can out for a long time, it loses its fizz. Which equation represents the balanced chemical equation for this reaction?

Answers

Answer:

H₂CO₃ (aq) → CO₂ (g) + H₂O (l)

Explanation:

Step 1: Write out unbalanced decomposition equation

H₂CO₃ (aq) → CO₂ (g) + H₂O (l)

Step 2: Balance equation

We see that we have 3 oxygens on both sides of the reaction.

We also see that we have 1 carbon on both sides of the reaction.

We also see that we have 2 hydrogens on both sides of the reaction.

Therefore, the chemical equation is balanced.


What is heat?
O Fire
O Hot
O Energy
O Potential

Answers

Answer:

Energy

Explanation:

Heat is a form of energy.

The Avogadro constant is defined as​

Answers

Answer:

Hope this may help you

What mass of aluminum has a total nuclear charge of 3.0 C?Aluminum has atomic number 13. Suppose the aluminum is all of the isotope with 14 neutrons.

Answers

Answer:

The value is [tex]m = 6.48*10^{-5} \ g [/tex]

Explanation:

From the question we are told that

The total nuclear charge is [tex]Q_t = 3.0 \ C[/tex]

The atomic number is [tex]n = 13[/tex]

The number of neutrons is [tex]n = 14[/tex]

Generally the number of protons is mathematically represented as

[tex]N_p = \frac{Q_t}{p}[/tex]

Here p is the charge on a proton with the value [tex]p = 1.60 *10^{-19} \ C[/tex]

=> [tex]N_p = \frac{3}{p}[/tex]

=> [tex]N_p = \frac{3}{1.60 *10^{-19} }[/tex]

=> [tex]N_p = 1.875*10^19 \ protons [/tex]

Generally the number of atoms present is mathematically represented as

[tex]N_a = \frac{N_p}{n }[/tex]

=> [tex]N_a = \frac{ 1.875*10^19}{13}[/tex]

=> [tex]N_a = 1.44*10^{18} \ atoms [/tex]

Generally the number of moles of atom present is mathematically represented as

[tex]N = \frac{N_a}{A_n }[/tex]

Here [tex]A_n[/tex] is the Avogadro's number with a constant value

[tex]A_n = 6.023*10^{23}[/tex]

So

[tex]N = \frac{1.44*10^{18}}{6.023*10^{23} }[/tex]

=> [tex]N = 2.4*10^{-6} \ mol[/tex]

Generally the total mass is mathematically represented as

[tex]m = N * M[/tex]

Here  M is the molar mass of   aluminum with

         [tex]M  =  27 \  g/mol[/tex]

So

        [tex]m  = 2.4*10^{-6}  * 27[/tex]

         [tex]m  = 2.4*10^{-6}  * 27[/tex]

         [tex]m  = 6.48*10^{-5} \  g [/tex]

The mass of aluminum has a total nuclear charge of 3.0 C is 6.45 * 10⁻⁵ g

Number of protonsNumber of protons = nuclear charge/charge on proton

nuclear charge = 3.0 C

mass of proton = 1.60 * 10⁻¹⁹ C

Number of protons = 3.0/1.60 * 10⁻¹⁹ C

Number of protons = 1.875  * 10¹⁹ protons

Number of atomsNumber of atoms = number of protons /atomic number

atomic number = 13

Number of atoms = 1.875  * 10¹⁹/13

Number of atoms = 1.44 * 10¹⁸ atoms

Number of moles of atomsMoles of atoms = number of atoms / 6.02 * 10²³

moles of atoms =  1.44 * 10¹⁸/ 6.02 * 10²³

moles of atoms = 2.39 * 10⁻⁶ moles

Mass of aluminummass = number of moles * molar mass

molar mass of Aluminum is 27 g

mass of aluminum = 2.39 * 10⁻⁶ * 27

mass of aluminum = 6.45 * 10⁻⁵ g

Therefore, the mass of aluminum has a total nuclear charge of 3.0 C is 6.45 * 10⁻⁵ g

Learn more about nuclear charge and atomic mass at: https://brainly.com/question/14783477

https://brainly.com/question/14227831

When 3.0 g of water is warmed from 10.0∘C to 80.0∘C, how much heat energy is needed? Specific heat for water is 4.186Jg(∘C).

Answers

Answer:

Specific heat is the amount of heat energy required to raise the temperature of substance by, the units for specific heat is, each element have particular fixed specific heat.

The heat energy change can be obtained by the formula

Temperature change can be represented by 

If we know the specific heat of substance then we can easily calculate the heat energy change of the substance

A diprotic acid, H₂A, has Ka1 = 3.4 × 10⁻⁴ and Ka2 = 6.7 × 10⁻⁹. What is the pH of a 0.18 M solution of H₂A?

Answers

Answer:

pH = 2.10

Explanation:

We name an acid as diprotic because it can release two protons:

H₂A  +  H₂O  ⇄  H₃O⁺   + HA⁻     Ka₁

HA⁻  +  H₂O  ⇄  H₃O⁺   + A⁻²      Ka₂

We propose the mass balance:

Analytical concentration = [H₂A] +  [HA⁻]  + [A⁻²]

As Ka₂ is so small, we avoid the [A⁻²] so:

0.18 M = [H₂A] +  [HA⁻]

But we can not avoid the HA⁻, because the Ka₁. Ka₁'s expression is:

Ka₁ = [H₃O⁺] . [HA⁻] / [H₂A]

We propose the charge balance:

[H₃O⁺] = [HA⁻] + [A⁻²] + [OH⁻]

As we did not consider the A⁻², we can miss the term and if

Kw = H⁺ . OH⁻

We replace Kw/H⁺ = OH⁻. So the new equation is:

[H₃O⁺] = [HA⁻] + Kw / [H₃O⁺]

The acid is so concentrated, so we can avoid the term with the Kw, so:

[H₃O⁺] = [HA⁻]

In the mass balance we would have:

0.18 M = [H₂A]

We replace at Ka₁

Ka₁ = [H₃O⁺] . [HA⁻] / [H₂A]

Ka1 . 0.18 / [H₃O⁺] = [HA⁻]

We replace at the charge balance:

[H₃O⁺] = Ka1 . 0.18 / [H₃O⁺]

[H₃O⁺]² = 3.4×10⁻⁴  . 0.18

[H₃O⁺] = √(3.4×10⁻⁴  . 0.18)

[H₃O⁺] = 7.82×10⁻³

- log [H₃O⁺] = pH → - log 7.82×10⁻³

pH = 2.10

Following are the calculation to the pH:

For First ionization:

[tex][H^+] = (K_{a1} \times C)^{\frac{1}{2}}[/tex]

where

C = initial concentration of acid [tex]= 0.18\ M[/tex]

[tex][H^{+}] = (3.4 \times 10^{-4} \times 0.18 \ M)^{\frac{1}{2}}\\[/tex]

[tex][H^{+}] = 0.007\ M[/tex]

For Second ionization:

[tex][H^{+}] = K_{a2} \\\\[/tex]

[tex][ H^{+} ] = 6.7 \times 10^{-9}\ M \\[/tex]

[tex]Total [H^{+}] = 0.007\ M + 6.7 \times 10^{-9}\ M\\\\Total [H^{+}] = 0.007 \ M[/tex]

[tex]pH = -\log[H^+] \\\\pH = -\log(0.007 \ M)\\\\pH = 2.15[/tex]

Therefore, the pH is "2.15".

Learn more:

brainly.com/question/8962960

an element has atomic number and mass number 13 and 27 respectively. what are the number of electrons protons and neutrons in one atom of the element​

Answers

Answer:

the number of electrons is 13 and neutrons is 14

Rounding 6.42 g to 2 significant figures

Answers

Answer:

6.4

Explanation:

A 60.04 g sample of a compound of carbon, sulfur, hydrogen and oxygen is burned completely. Calculate the empirical formula if 44.8 L of water at STP and 88.0 g of CO2 is formed. In another experiment, a 15.00 g sample of the compound produced 1.00L SO2 at 25.0 oC and 3.05 atm. In a final experiment: 3.57 L of the compound at 2.33 atm and 25 o C weighted 35.0g Find the molecular formula of the compound.

Answers

Answer:

Empirical formula: C₂SH₄

Molecular formula: C₄S₂H₈

Explanation:

The empirical formula is the simplest whole ratio of atoms presents in an element.

The compound contains C, S and H, its empirical formula is CₐSₓHₙ. We need to determine a, x and n solving for the moles of each element, thus:

Moles H₂O - moles H-:

PV/RT = n

At STP, P is 1atm, and T is 273.15K:

1atm*44.8L / 0.082atmL/molK*273.15K

moles H₂O = 2 moles water = 4 moles of H

Because 1 moles of water contains 2 moles of H

Moles CO₂ = moles C:

88.0g CO₂ * (1mol / 44g) = 2 moles CO₂ = 2 moles C

The mass of carbon is:

2 moles * (12g/mol) = 24g

Mass of hydrogen:

4 moles * (1g/mol) = 4g

The mass of S is:

60.04g - 24g - 4g = 32.04g = 1 mole of S

Empirical formula is:

C₂SH₄

Now, the moles of the compound in the final experiment are:

PV / RT = n

2.33atm*3.57L / 0.082atmL/molK*298.15K = 0.34 moles

-25°C = 298.15K. In gas laws you must use absolute temperature given in Kelvin-

These moles are in 35.0g. The molar mass of the compound is:

35.0g / 0.34 moles = 102.9g/mol

As the empirical formula is C₂SH₄ and weighs 60g/mol. Twice the empirical formula are the molecular formula:

C₄S₂H₈

The Molecular formula of the compound: C₄S₂H₈

Empirical formula:It is the simplest whole number ratio of atoms present in a compound.The compound contains C, S and H, its empirical formula is CₐSₓHₙ. We need to determine a, x and n solving for the moles of each element, thus:Moles of  H₂O= Moles of  H:

[tex]n=\frac{PV}{RT}[/tex]

At STP, P is 1atm, and T is 273.15K:

[tex]n= \frac{1atm*44.8L}{0.082atmL/molK*273.15K}[/tex]

Moles H₂O = 2 moles water = 4 moles of H

As, 1 moles of water contains 2 moles of H

Moles of  CO₂ = Moles of C:

88.0g CO₂ * (1mol / 44g) = 2 moles CO₂ = 2 moles C

We know,

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

Mass of carbon is: [tex]2 moles * (12g/mol) = 24g[/tex]

Mass of hydrogen is: [tex]4 moles * (1g/mol) = 4g[/tex]

Mass of sulphur is: [tex]60.04g - 24g - 4g = 32.04g[/tex] = 1 mole of S

The derived Empirical formula will be: C₂SH₄

Now, the moles of the compound in the final experiment are:

[tex]n= \frac{PV}{RT}\\\\n=\frac{2.33atm*3.57L}{0.082atmL/molK*298.15K}\\\\ n= 0.34 moles[/tex]

These moles are in 35.0g. The molar mass of the compound is: [tex]\frac{35.0g}{0.34 moles} =102.9g/mol[/tex]

As the empirical formula is C₂SH₄ and weighs 60g/mol.

The empirical formula is two times the molecular formula: C₄S₂H₈

Find more information about "Molecular formula" here:

brainly.com/question/1603500

Water that is heated move
PLS HELP !!!

Answers

Answer:

it moves faster when heated

Answer:

the answer is faster

Explanation:

why because water moves faster when heated

Which term describes the energy an object has because of its motion?

Answers

kinetic energy (the energy of motion)

Answer:

kinetic

Explanation:

Which of the following is a homogenous mixture? a. water b. chicken c. raisin bread d. salad

Answers

B and C are ur answers

What is the volume of a sample of matter with a density of 6 and a mass of 6 cm3?

Answers

Answer:

We have the final answer as

1.0 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question

mass = 6 g

density = 6 g/cm³

It's volume is

[tex]volume = \frac{6}{6} = 1 \\ [/tex]

We have the final answer as

1.0 cm³

Hope this helps you

1)
Which of the following would a chemist be most likely to study?
A what happens when a moving car comes to a stop
B.
what happens when iron rusts in the presence of water
C. what happens when ice melts to form liquid water
D. what happens when light reflects from a shiny surface

Answers

Answer:

B. what happens when iron rusts in the presence of water

Explanation:

Chemistry is a branch of science involving the composition and changes of matter. In other words, a chemist, who is a trained specialist in the science of chemistry, seeks to answer questions related to properties of matter.

In this question, a chemist is most likely to study "what happens when iron rusts in the presence of water" because it involves a change in the chemical properties of a substance (iron) i.e. a chemical change. However, what happens when ice melts to liquid water is a physical change.

5400 L to KL
With work??

Answers

Answer:

5.4KL

Explanation:

Divide by 1000

Can you help me answer the question ?

Answers

the answer is vacuole

A solid keeps its shape due to which of the following factors? (3 points)
а
Space between particles
Attractive forces between particles
b
Ос
The type of element in the solid
Od
The container it is placed in

Answers

Answer: Attractive forces between particels

Explanation:

Which of the following is characteristic of grasslands, but not savannas? a. wide temperature range b. two seasons c. droughts and fires d. wet and dry seasons

Answers

Answer:

wide temperature range

Explanation:

Grasslands are ecosystem that covers grass and herbs. It can occur in any type of climates. The rainfall is low in grasslands but it is periodic. The temperature in the summer can exceed 100 degrees Fahrenheit in grasslands.

Savannas is a type of grasslands. It is also known as tropical grasslands. They have average annual temperatures that only vary between 70 and 78 degrees Fahrenheit.

It can be concluded that, out of the given options, that shows the characteristic of grasslands, but not savannas is option (a) " wide temperature range".

Answer: A. wide temperature range

Explanation: Got it correct on the Edgenuity 2020 quiz :)

What should you do every time you are about to heat glassware on a hot plate?
Select one or more:
Check that there are no cracks in the glassware
Ensure that the glassware is designed for heating
Inspect the hot plate for frayed cords
0 Measure the height and width of the glassware

Answers

Answer:

Ensure that the glassware is designed for heating

Check that there are no cracks in the glassware

Inspect the hot plate for frayed cords

Explanation:

All except measuring the height and width of the glassware could cause hazards within the lab.

Suppose you are given samples of pentane, 2,2-dimethylpropane, 2-methylbutane and hexane. how you would go about determining which substance had the highest boiling point.​

Answers

Answer:

Addiction

Explanation:

Which statement best describes the polarity of SCL4F2?
a. The molecule is always polar.
b. The molecule s always nonpolar.
c. Depending on the arrangement of outer atoms, this molecule could be polar or nonpolar.

Answers

Answer: Depending on the arrangement of outer atoms, this molecule could be polar or nonpolar.

Explanation:

Polarity is when the electric charge that is leading to a molecule is being separated.

The polarity of SCL4F2 can either be polar or non polar and this depends on the arrangement of outer atoms. It is the arrangements of these outer atoms that'll help in the determination of its polarity.

The molecule SCl4F2 could be polar or nonpolar depending on the arrangement of outer atoms.

The molecule SCl4F2 could have different arrangements of outer atoms. That means that there are two possible arrangements of the molecule. Depending on which arrangement the outer Cl and F atoms have, the molecule cold be polar or nonpolar.

In the arrangement of SCl4F2  which could be polar is the one in which the dipoles in the molecule do not cancel out. In the other arrangement, the dipoles cancel out and the molecule is nonpolar.

Learn more: https://brainly.com/question/1340582

What is the mass of a block that measures 6.7cm x 6.8cm x4.3cm and has a density of 22.29g/cm³

Answers

Answer:

4366.8 grams or 4.4 kg

Explanation:

Density = Mass / Volume

Mass = Density x Volume

M = 6.7 x 6.8 x 4.3 x 22.29

M = 4366.8 g

Best Regards!

What is the answer? Please

Answers

Answer:

true

Explanation:

what is the answer? please

7. What must you do before you make a hypothesis?

Answers

Answer:

Ask a question?

Explanation:

look at the scientific method uwu

The charge on the cobalt ion in the salt CoO is ________.

Answers

Answer:

The charge of cobalt in the salt is + 2.

Explanation:

The charge of the salt = 0 . This is because it is neutral.

Charge of cobalt = ?

Charge of oxygen = -2 (This is a constant value, it is -2 only in peroxides)

Charge of salt = Charge of cobalt + Charge of oxygen

0 = x + (-2)

x = + 2

The charge of cobalt in the salt is + 2.

when the temperature of a sample of liquid increases , what else increases ?

Answers

Answer:

Its kinetic energy.

Explanation:

In a liquid, the molecules are so close together that there is very little empty space. A liquid also has a definite volume, because molecules in a liquid do not break away from the attractive forces. The molecules can, however, move past one another freely, and so a liquid can flow, can be poured, and assumes the shape of its container.

An increase in the temperature of a liquid causes an increase in the average speed of its molecules. As the temperature of a liquid increases, the molecules move faster thereby increasing the liquid's kinetic energy.

Humans breathe about 500 mL of air per breath and take about 12 breaths per minute during normal activities. If a person is exposed to an atmosphere containing benzene at a concentration of 10 ppm (by volume), how many grams of benzene will be deposited in the lungs during an 8-hour shift if all the benzene that enters remains in the lungs

Answers

Answer:

mass of benzene in the lungs = 28.8 g of benzene

Explanation:

Volume of air breathed per hour = 500 mL * 12 * 60 = 360000 ml = 360 Litres of air

In 8 hours, volume of breathed air = 360 L * 8 = 2880 Litres of air

Concentration of benzene in air = 10 ppm

Note:  1 ppm = 1 mg per liter (mg/L)

10 ppm = 10 mg/L

Therefore, mass of benzene in the lungs in an 8-hour shift = 10 mg/L * 2880 L

mass of benzene in the lungs = 28800 mg

Converting to grams = 28800/1000

mass of benzene in the lungs = 28.8 g of benzene

Other Questions
The mission of JROTC is to train citizen soldiers for the future of the U.S.A) TrueB) False nuytytcycvyfuycdutctcytcytchgcytclucjhcutc f(x)=4x-5 has been reflected over the x-axis. What is the new function, g(x)?(1 Point)g(x)=-4x+5g(x)=-4x-5g(x)=4x+5g(x)=5x-4 Which phrase describes foliated rocks? DO NOT CHECK ALL THAT APPLY tend to break in halfgrains arranged randomlytend to split apart along bandsgrains arranged in increasing size which phrase or sentence from the excerpt best provides context for the story boy who harnessed the wind Simplify the expression. (5x^3+4x^2+6x-3)+(-2x^3+3x^2-7x+9)-(5x+3)(4x^2+x-1) Should the government keep a Doomsday plane or similar resource in continuous operation? Which of the following statements about stopping/twisting is NOT true? A. mostly occurs in individual sports B. can result in ligament and tendon damage C. is a movement required in most fast-paced sports D. creates stress and strain on joints Please select the best answer from the choices provide HELP ME PLEASE ITS BEEN 2 HOURS PLS HELP 3/3//3/3/ Which line is perpendicular to y=7x-3 if the perpendicular line passes through the point (7, 7)? a) y=-7x-1 b) y=-7x+8 c) y=-1/7x+8 d) y=-1/7x+1 Under the Pendleton Act of 1883, some government jobs were filled by... Carlos' cell phone company charges $50 per month for unlimited calls and internet use and $0.15 per text message. His last cell phone bill was $56.75. How many text messages did Carlos send last month? NEED IT ASAPwhats is the quotient2 1/5-1/10 What is the range of the set of ordered points defined below?{(1,0), (2,0), (3, 0), (4,0), (5,0)}A{0, 1, 2, 3, 4, 5)B{1,6,3,4,5)c {4}D{0} Of the students at Milton Middle School, 144 are girls.If 45% of the students are girls, how many total students are there at Milton Middle school. What is Neeley Grocery's operating leverage factor at the target level of operating income? A. 1.60. B. 0.63. C. 2.67. D. 0.40. How did farming change societies? NEED ANSWER FAST What type of government did the Roman Empire utilize?feudalismcentralized governmentmonarchyregional government What is 3/8-2 what does it equal f(x) = 3x + 10g(x) = x - 2Find f(g(0))