N2(g) + 3H2(g) → 2NH3(g); ΔH = -91.8 kJ Consider the thermochemical equation for the synthesis of ammonia. Which statement is true? A) Negative enthalpy indicates that energy is required to complete the reaction. B) Negative enthalpy indicates a decrease in potential energy and an endothermic reaction. C) Enthalpy is negative indicating that energy is released so this is an exothermic reaction. D) Enthalpy is negative indicating that there is an energy deficit; the reaction is incomplete.

Answer: 0.0625 grams left in the patients blood stream

Explanation:

half life formula: A = o(1/2)^t/d

A represents answer, o represents original amount of iodine used, t represents time iodine is used for, d represnts half life of iodine.

A = 1(1/2)^32/8

A = 0.0625 grams left in the patients blood stream

Answer:

1.570065717611

Explanation:

atomic mass and grams of sample, this gives you he amounts of atoms

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Answer:

Celsius, Fahrenheit and Kelvin are the three common temperature scales.

Explanation:

Celsius, Fahrenheit and Kelvin are the three common temperature scales.

Answer:

P2 = 3

Explanation:

u know that:

V1 = 2.0L

P1 = 1.5 atm

V2 = 1.0L

P2 = ?        (p1v1=p2v2)

1.5x2 = P2x1.0

3=P2x1.0    =>> 3.0 =P2

divided both side by 1.0 the remove 1.0 (left P2)

The pressure by decreasing the volume to 1 L will be  [tex]P_2=3 \ atm[/tex]  

The given data is that

Volume    [tex]V_1=2 \ Litres[/tex]

Pressure  [tex]P_1=1.5\ atm[/tex]

When volume is reduced to

[tex]V_2=1\ liters[/tex]

By using Boyles Law

[tex]P_1V_1=P_2V_2[/tex]

[tex]P_2=\dfrac{P_1V_1}{V_2}[/tex]

[tex]P_2=\dfrac{2\times 1.5}{1} =3 \ atm[/tex]

Thus the pressure by decreasing the volume to 1 L will be  [tex]P_2=3 \ atm[/tex]  

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Hence, the new pressure of the neon gas is 833.3 mm Hg.

To calculate the new pressure, we apply Boyle's law

Boyle's law state that, at a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.

Formula:

Where:

Make P' the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the new pressure of the neon gas is 833.3 mm Hg.

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They are oxidised in the body into simple sugars like glucose.

They are also known as dietary fibres.

They are chemical substances that help in maintaining a healthy body.

Not proper functioning of thyroid gland.

D. 6.6

Strong acid pH range < 3

weak base pH range 8-11

A strong acid is used as a titrant against a weak base. The most likely pH for the equilibrium point will be 6.6.

pH, a scale that quantifies the acidity as well as basicity of liquid solutions that are aqueous or other.

Any acid which entirely ionizes in solutions would be considered a strong acid. This indicates that when dissolved in a solution, it emits the most hydrogen ions as well as protons.

The pH will not neutral there at an equivalence point when a weak base is compared to a strong acid. The solution is just in fact acidic (pH ≅ 6.6) there at the equivalency point.

Therefore, the correct answer will be option (D).

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Answer:

Letrang A o B o C o D or Letter A or B or C or D

The volume occupied by one mole of gas at stp is known as the standard molar volume of a gas. It has been found to be 22.41410 L. According to Avagadro's law, one mole of any gas will occupy the same volume as one mole of any other gas at the same temperature and pressure, despite mass difference. Knowing the volume of gas, you can use 1 mol/22.4L as a conversion factor to find the number of moles, and therefore the mass, of a given volume of a given gas at STP.

Behaviour of gases:

‎ㅤ‎ㅤ‎ㅤ ➝ PV = KT

Answer:

An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons. An acid is a proton donor. A base accepts a proton.Explanation:

[tex]\Large \text{1)}[/tex]

[tex]\textbf{Use the formula and substitute the values}[/tex]

[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]

[tex]\textbf{Solve for the number of moles}[/tex]

[tex]n = 0.003\ mol[/tex]

[tex]\textbf{Calculate final volume }[/tex]

[tex]40+10=50\ mL[/tex]

[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]

[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]

[tex]\Large \text{2)}[/tex]

[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]

[tex]\displaystyle DF=\frac{50}{10}=5[/tex]

Answer:

sodium is a metal,It's known as soft and silvery.

Answer:

Magnesium fluoride is prepared from magnesium oxide with sources of hydrogen fluoride such as ammonium bifluoride: MgO + (NH4)HF2 → MgF2 + NH3 + H2O. Related metathesis reactions are also feasible. The compound crystallizes as tetragonal birefringent crystals.

Answer:

O2=1

CO2=2

1:2

aah its the answer

Answer:

for their fur

Explanation:

because the body is hunt

Answer:

Elevation.

Explanation:

Although latitude is a very important factor in temperature, Las Vegas and Mt. Charleston are pretty close to each other, which makes me think that elevation would be the only thing that could explain the extreme difference in temperature.

The volume of 0.0206 M KMnO₄ required to titrate 0.176 g of Na₂C₂O₄ dissolved in 50.0 mL of solution is 25.5 mL (Option C)

Mole = mass / molar mass

Mole of Na₂C₂O₄ = 0.176 / 134

Mole of Na₂C₂O₄ = 1.313×10¯³ mole

2KMnO₄ + 8H₂SO₄ + 5Na₂C₂O₄ —> 2MnSO₄ + 8H₂O +10CO₂ + 5Na₂SO₄ + K₂SO₄

From the balanced equation above,

5 moles of Na₂C₂O₄ reacted with 2 moles of KMnO₄

Therefore,

1.313×10¯³ mole of Na₂C₂O₄ will react with = (1.313×10¯³ × 2) / 5 = 5.252×10¯⁴ mole of KMnO₄

Volume = mole / molarity

Volume of KMnO₄ = 5.252×10¯⁴ / 0.0206

Volume of KMnO₄ = 0.0255 L

Multiply by 1000 to express in mL

Volume of KMnO₄ = 0.0255 × 1000

Volume of KMnO₄ = 25.5 mL

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Answer: Ability to combine with hydrogen

Explanation:

The ability to combine with another substance is called reactivity and it is classified as a chemical property, not physical

Answer:

Advances in Technologies with Relevance to Biology: The Future Landscape

This chapter provides an overview and a perspective on the breadth and types of technologies that may have an impact on the life sciences enterprise of the future, with the understanding that there are inherent difficulties in anticipating or predicting how any of these technologies alone or in combination will alter the nature of the future threat “landscape.”

Rather than attempt to cover the technology landscape in a comprehensive manner, this chapter (1) highlights technologies likely to have obvious or high-impact near-term consequences; (2) illustrates the general principles by which technological growth alters the nature of future biological threats; and, (3) highlights how and why some technologies are complementary or synergistic in bolstering defense against future threats while also enhancing or altering the nature of future threats.

.

Explanation:

Answer:

C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)

Explanation:

In the original equation: C₅H₁₀O (l) + O₂ (g) --> H₂O (g) + CO₂ (g)

Reactants: 5 carbon, 10 hydrogen, 3 oxygen

Products: 1 carbon, 2 hydrogen, 3 oxygen

Cleary, the equation is not balanced. When deciding which element to balance first, avoid balancing elements that are present in more than one molecule on either side (ex. the oxygen on the reactant side). In this case, I started with carbon. Once the carbon was balanced, I balanced the hydrogen, keeping in mind the new coefficients I added when balancing the carbons. Lastly, I balanced the oxygen.

The balanced equation: C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)

Reactants: 5 carbon, 10 hydrogen, 15 oxygen

Products: 5 carbon, 10 hydrogen, 15 oxygen

The  [OH⁻] of the solution is 5.37×10⁵ M.

This is the negative logarithm to base 10 of hydroxy ion [OH⁻] concentration.

To calculate the hydroxy ion [OH⁻] concentration we use the formula below.

Note:

Formula:

Given:

Substitute the value into equation 1

Hence, The [OH⁻] of the solution is 5.37×10⁵ M.

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The concentration of the hydroxide ion [OH¯] in the solution is 5.89×10¯⁵ M

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

pH + pOH = 14

9.77 + pOH = 14

Collect like terms

pOH = 14 – 9.77

pOH = 4.23

pOH = –Log [OH¯]

4.23 = –Log [OH¯]

Multiply through by –1

–4.23 = Log [OH¯]

Take the anti-log of –4.23

[OH¯] = anti-log (–4.23)

[OH¯] = 5.89×10¯⁵ M

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[tex]\Large \text{1)}[/tex]

[tex]\textbf{Use the formula and substitute the values}[/tex]

[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]

[tex]\textbf{Solve for the number of moles}[/tex]

[tex]n = 0.003\ mol[/tex]

[tex]\textbf{Calculate final volume }[/tex]

[tex]40+10=50\ mL[/tex]

[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]

[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]

[tex]\Large \text{2)}[/tex]

[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]

[tex]\displaystyle DF=\frac{50}{10}=5[/tex]

Answer:

this is the answer to the question 0.1962

Explanation:

4/20.18

=0.1962

Answer:

2k

Explanation:

Answer:

unequally

Explanation:

this is because many different physical factors vary massively over the earth