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What happens when baking soda is mixed with vinegar
A. A new substance is formed.
B. The substances stay the same.
C. The baking soda stays the same but the vinegar changes form.
D. The mixture turns from a liquid into a solid.

Answer:

10g

Explanation:

find the limiting agent first

using mole ratio

2 moles of NAOH reacts with 2 moles of H2SO4

then 20g of NAOH require 20g of H2SO4

USING mole ratio on the limiting agent and product

2moles of NAOH produces 1 mole of NA2SO4

THEN

20g of NAOH will produce X

THEN solve for X

X =10g

Answer: [tex]CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2[/tex]

Explanation:

Neutralization is a chemical reaction in which acid and base combine to form salt and water. Acids donate[tex]H^+[/tex] and bases donate [tex]OH^-[/tex]  in water which combine to form water molecules.

The chemical reaction between calcium carbonate and hydrochloric acid forms calcium chloride , water and carbon dioxide.

The balanced chemical equation is:

[tex]CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2[/tex]

Answer: Triels, Tetrels, Pnictogens and Chalcogens

Explanation:

Between the Transition metals and the Halogens lies Groups 13, 14, 15 and 16.

Group 13 are also known as Triels and consist of elements like Boron and Aluminium.

Next up is Group 14 also known as the Tetrals and they consist of elements like Carbon, Silicon and Tin.

The Group 15 elements are known as Phictogens and consist of Nitrogen, Phosphorus and Arsenic.

Finally we have the Chalcogens or Group 16 elements such as oxygen, Sulfur and Selenium.

Answer:

I don't understand your question

Answer:  [tex]2C_{12}H_{26}(l)+37O_2(g)\rightarrow 24CO_2(g)+26H_2O(g)[/tex]

2.  369 L

Explanation:

1. Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.

The balanced chemical reaction is:

[tex]2C_{12}H_{26}(l)+37O_2(g)\rightarrow 24CO_2(g)+26H_2O(g)[/tex]

2. To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{220g}{170.3g/mol}=1.29moles[/tex]

According to stoichiometry :

2 mole of dodecane produces = 24 moles of carbon dioxide

Thus 1.29 moles of dodecane produces = [tex]\frac{24}{2}\times 1.29=15.5 moles[/tex] of carbon dioxide

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 1 atm

V = Volume of gas = ?

n = number of moles = 15.5

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]17^0C=(17+273)K=290K[/tex]

[tex]V=\frac{nRT}{P}[/tex]

[tex]V=\frac{15.5\times 0.0821L atm/K mol\times 290K}{1atm}=369L[/tex]

Thus the volume of carbon dioxide gas that is produced is 369 L

Answer:

Vaccines include a variety of ingredients including antigens, stabilizers, adjuvants, antibiotics, and preservatives. They may also contain residual by-products from the production process.

Answer:

Because The white gene is the recessive gene and the brown gene is the dominant gene hence all the offspring being brown instead of white :)

Explanation:

Thank me later!

Answer:

25 years.

Explanation:

From the question given above, the following data were obtained:

Original amount (N₀) = 10 g

Time (t) = 50 years

Amount remaining (N) = 2.5 g

Half-life (t½) =?

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

Original amount (N₀) = 10 g

Amount remaining (N) = 2.5 g

Number of half-lives (n) =?

N = 1/2ⁿ × N₀

2.5 = 1/2ⁿ × 10

Cross multiply

2.5 × 2ⁿ = 10

Divide both side by 2.5

2ⁿ = 10 / 2.5

2ⁿ = 4

Express 4 in index form with 2 as the base.

2ⁿ = 2²

n =2

Thus, 2 half-lives has elapsed.

Finally, we shall determine the half-life of the radioactive substance. This can be obtained as follow:

Time (t) = 50 years

Number of half-lives (n) = 2

Half-life (t½) =?

n = t / t½

2 = 50 / t½

Cross multiply

2 × t½ = 50

Divide both side by 2

t½ = 50 / 2

t½ = 25 years.

Thus, the half-life of the radioactive substance is 25 years.

Answer:

A. cementation

Explanation:

( it deleted my answer)

Answer:

0.648 g

Explanation:

Step 1: Write the balanced equation

2 Na(s) + 2 H₂O(l) ⇒ 2 NaOH(aq) + H₂(g)

Step 2: Calculate the partial pressure of H₂

The total pressure (P) is equal to the sum of the partial pressures of hydrogen and water vapor.

P = pH₂O + pH₂

pH₂ = P - pH₂O

pH₂ = 759 mmHg - 23.8 mmHg = 735 mmHg

Step 3: Convert "pH₂" to atm

We will use the conversion factor 1 atm = 760 mmHg.

735 mmHg × 1 atm/760 mmHg = 0.967 atm

Step 4: Convert "25°C" to K

We will use the following expression.

K = °C + 273.15 = 25°C + 273.15 = 298 K

Step 5: Calculate the moles of hydrogen (n) formed

We will use the ideal gas equation.

P × V = n × R × T

n = P × V/R × T

n = 0.967 atm × 8.11 L/(0.0821 atm.L/mol.K) × 298 K = 0.321 mol

Step 6: Calculate the mass corresponding to 0.321 moles of hydrogen

The molar mass of H₂ is 2.02 g/mol.

0.321 mol × 2.02 g/mol = 0.648 g

Solution :

1. It is given that when Edman's reagent is used, it releases PTH-Glycin. The degradation of Edmans is used for the amino acids to sequencing of the peptide/protein and is also removes N terminal amino acid and thus gives us the PTH amino acid product.

Therefore, the first amino acid is Glycine.

2. The Carboxypeptidase A releases the C terminal amino acid, and therefore the last amino acid is Phe.

3. The Cyanogen Bromide helps to chop after the Med residue, therefore the sequence is 1 - 2 - 3 or 2 - 1 - 3.

4. The trysin chops after the basic amino acid - Arg and the Lys unless followed by Proline and so the sequence of the peptide is 1 - 2 - 3 4.

Calcium also be called the calcium of citric acid because calcium citrate malate contains the calcium salt of citric acid and malic acid.

Citric acid is an organic compound with a chemical formula [tex]HOC(CO_2H)[/tex].

Calcium citrate malate is a water-soluble calcium supplement. It is the calcium salt of citric acid and malic acid with variable composition.

Hence, calcium is also called the calcium of citric acid.

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Answer:

B

Explanation:

don't try to do that at home

Answer:false

Explanation:false

Answer:

true

Explanation:

hoping for the brainliest

Answer:

13414 years

Explanation:

From;

0.693/ t1/2 = 2.303/t log No/N

t1/2 = half life of  C-14

t = age of the sample

No= initial amount of C-14

N = present amount of C-14

From the question, N = 0.2 No

Hence;

0.693/5700 = 2.303/t log No/0.2No

1.2 * 10^-4 = 2.303/t log 1/0.2

1.2 * 10^-4 = 1.6097/t

t = 1.6097/1.2 * 10^-4

t = 13414 years

Answer:

A

Explanation:

Answer:

temperature

Explanation:

hope this helps

Answer: H2o

Explanation:

because oxygen is in the air

Answer:

White blood cells are cells of the system, which play a neighborhood in protecting the body against infectious diseases and foreign bodies. These cells flow with the blood throughout the body then scavenge and kill the parasites and foreign bodies. Hence, they are called soldiers of the body.

I hope it's helpful!

Answer:The correct answer is C.

Explanation: I had it on a quiz

Answer: the answer is C growth

Explanation: body repair, motion and warmth are not the answer the reason why is because body repair is when the body repairs it’s self if it’s hurt and motion is when animals use the energy from the food they eat to move and warmth helps animals to get warm so they don’t get to cold so the answer would be growth .

Answer:

Higher melting and boiling points signify stronger noncovalent intermolecular forces. Consider the boiling points of increasingly larger hydrocarbons. More carbons means a greater surface area possible for hydrophobic interaction, and thus higher boiling points.

Answer: A) More base is likely required to reach the endpoint for the diprotic acid than for the monoprotic acid under these conditions

Explanation:

The monoprotic acid (HA) has a valency of 1 and diprotic acid  [tex](H_2A)[/tex] has a valency of 2.

As the concentration and volume of the diprotic acid and the monoprotic acids are equal.

The neutralization reaction for monoprotic acid is:

[tex]HA+BOH\rightarrow BA+H_2O[/tex]

The neutralization reaction for diprotic acid is:

[tex]H_2A+2BOH\rightarrow B_2A+2H_2O[/tex]

Thus more number of moles of base are required for neutralization of diprotic acid and thus the volume required will be more as concentration and volume of the diprotic acid and the monoprotic acids are equal.

Answer:

C is the Answer

Follow me please

Mark brainliest

Compounds are formed by the same or the different molecules of the elements. Iron has the lowest oxidation number in FeOH. Thus, option D is correct.

The oxidation number is the total gain or loss of the electrons by the atom to form a chemical bond with another atom in a molecule or a compound.

The oxidation state in a neutral compound adds up to zero. The oxidation number of oxygen is -2, and that of hydrogen a monoatomic ion is always +1.

Oxidation states are calculated as,

Fe(OH)₂:

X + 2 (-2 +1 ) = 0

X -2 = 0

X = +2

Fe(OH)₃:

X + 3 (-2 +1 ) = 0

X - 3 = 0

X = + 3

FeOH:

X -2 + 1  = 0

X - 1 = 0

X = +1

Therefore, iron has the lowest oxidation number in FeOH.

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Answer:

C. digestive; circulatory

Explanation:

It is the correct answer..

Answer:

Most Likely A High Pressure Center

Explanation:

is most likely high pressure Center because on a weather map over the southern western Pennsylvania there's mostly high pressure over there. The descending air diverges and spreads out from the center and their is a Coriolis effect which causes the Diverging air to rotate in a clockwise direction.

Answer:

The given statement- Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction, is True.

Explanation:

The Wittig reaction converts aldehydes and ketones into alkenes through a simple nucleophilic addition. A triphenylphosphorine ylide, also known as a phosphorane, reacts with an aldehyde/ketone to produce an oxaphosphetane, a four-membered cyclic intermediate. Instead of being isolated, the oxaphosphetane decomposes spontaneously to release triphenylphosphine oxide and an alkene.

In an SN2 reaction, triphenylphosphine, a good nucleophile, reacts with a primary alkyl halide, followed by deprotonation of the carbon with a solid base, such as butyllithium, to form the ylide. In the product alkene, the carbonyl carbon and the carbon initially bound to the halogen become two carbons with a double bond.

The Wittig reaction's true worth lies in its ability to produce an alkene with a predictable structure, as the C=C bond forms exactly where the C=O bond did in the reactant, with no isomers (other than E/Z isomers) forming.

Hence , the correct option is (A) True.