What would the volume of a gas be at –150°C, if it had a volume of 693 mL at 45°C?

Answer:

alpha emission

Explanation:

Answer:

Gold is an element. That means that it is the same all the way through and in an ideal state of purity contains nothing but gold atoms. Therefore it is not a mixture. In such a case it is as close to a uniform solid solution as may be, so it will be an homogeneous mixture.

Explanation:

really hope this helps :)

Answer:

A

Explanation:

HCl and NaOH is a strong acid and strong base, respectively, and hence dissociates completely and reacts to form water:

[tex]\displaystyle \text{H}_\text{(aq)}^+ + \text{OH}_\text{(aq)}^- \longrightarrow \text{H$_2$O}_\text{($\ell$)}[/tex]

We are given that 25.0 mL of 0.333 M NaOH was used to neutralize 15.0 mL of HCl.

Convert from moles of NaOH used to moles of HCl reacted:
[tex]\displaystyle \begin{aligned} 25.0\text{ mL} & \cdot \frac{0.333\text{ mol NaOH}}{1\text{ L}} \cdot \frac{1\text{ L}}{1000\text{ mL}} \cdot \frac{1\text{ mol OH}^-}{1\text{ mol NaOH}}\cdot \\ \\ & \cdot\frac{1\text{ mol H}^+}{1\text{ mol OH}^-} \cdot \frac{1\text{ mol HCl}}{1\text{ mol H}^+}\\ \\ & = 8.33\times 10^{-3}\text{ mol HCl}\end{aligned}[/tex]

Therefore, the molarity of the original HCl solution is:
[tex]\displaystyle \begin{aligned} \ [\text{HCl}] & = \frac{\text{ mol HCl}}{\text{L soln.}} \\ \\ & =\frac{8.33\times 10^{-3}\text{ mol HCl}}{15.0\text{ mL}} \cdot \frac{1000\text{ mL}}{1\text{ L}} \\ \\ & = 0.555\text{ M}\end{aligned}[/tex]

In conclusion, our answer is A.

Answer:

The onion cells release compounds into the air, and enzymes must follow up to alter amino acids into other compounds, causing irritation in the eye. To prevent, "crying" from an onion, try peeling the onion, then chilling the onion in the fridge for about 30 minutes. Otherwise, you can buy tearless onions.

Answer:

About 10.7 grams.

Explanation:

The reduction reaction is represented by:
[tex]\displaystyle \text{Sn}^{2+}_\text{(aq)} + 2e^- \longrightarrow \text{Sn}_\text{(s)}[/tex]

A current of 3.46 amperes (C/s) is passed through the solution for 1.40 hours. The total amount of charge is hence:
[tex]\displaystyle 1.40\text{ hour} \cdot \frac{3600\text{ s}}{1\text{ hour}}\cdot \frac{3.46\text{ C}}{1\text{ s}} = 1.74\times 10^4\text{ C}[/tex]

One mole of solid Sn is transferred per two moles of electrons. Hence, using Faraday's constant:
[tex]\displaystyle 1.74\times 10^4\text{ C} \cdot \frac{1\text{ mol e$^-$}}{96485\text{ C}} \cdot \frac{1\text{ Sn}}{2\text{ mol e$^-$}}\cdot \frac{118.71\text{ g Sn}}{1\text{ mol Sn}} = 10.7\text{ g Sn}[/tex]

In conclusion, about 10.7 grams of tin is plated out of the solution.

Answer:

The law of conservation of matter says that matter cannot be created or destroyed.

Explanation:

Answer:

Atoms don’t appear or disappear during the reaction. Instead, they get rearranged.

Explanation:

Edmentum answer

Answer:

a. BH₃

Explanation:

According to the octet rules, atoms reach stability when are surrounded by eight electrons in their valence shell when they combine to form a chemical compound.

From the options, the only compound in which the central atom does not meet the octet rules is BH₃. The central atom is boron (B), which has 3 electrons in its valence shell. When B is combined with hydrogen (H), 3 electrons from the 3 atoms of H are added. The total amount of electrons is 6, fewer than 8 electrons needed to meet the rule.

hope this helps

Answer:

Option C

Explanation:

Answer:

The rate of the forward reaction equals the rate of the reverse reaction.

Explanation:

Answer:

c. sun, radiation

Explanation:

Answer: 4.7 L

Explanation:

Answer:

22.11 atm

Explanation:

Use the ideal gas law PV=nRT

P(100)=88(.08)(314)

100P=2210.56

P=22.11 atm

Answer:

The 18th-century German physicist Daniel Gabriel Fahrenheit originally took as the zero of his scale the temperature of an equal ice-salt mixture

Explanation:

Answer:

salt is solute,water solvent, the mixture is the solition.

A student dissolves 15 grams of salt in 250 mL of water. The solute is salt and the solvent is water.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

For solutions with components in the same phase, the substances present in lower concentration are solutes, while the substance present in highest abundance is the solvent.

Therefore, A student dissolves 15 grams of salt in 250 mL of water. The solute is salt and the solvent is water.

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Answer:

active carriers

Explanation:

Mosquitoes are responsible for transmitting the zika virus. In this case, the mosquitoes are active carriers

Answer:

E -- active carriers

Explanation:

the mosquitos would be active carriers...

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Also remember to rate answers to help other students, While leaving thanks to answers that help you. Have a great day!

Let's check

[tex]\\ \rm\Rrightarrow C_4H_{2(4)-2}[/tex]

[tex]\\ \rm\Rrightarrow C_4H_{8-2}[/tex]

[tex]\\ \rm\Rrightarrow C_4H_6[/tex]

So

Option B

Based on the information provided and the assumption that the mole ratio of the acid to the base is 1:1, the molarity of the acid would be 0.0425 M

Using the equation:

CaVa = CbVb

This is based on the assumption that the stoichiometric mole ratio of the acid to the base is 1:1.

Ca = CbVb/Va

                   0.1 x 25.5/60 = 0.0425 M

More on acid/base titration can be found here: https://brainly.com/question/2728613

Answer: D

Explanation:

The litmus paper will help determine the pH, and thus if it is an acid or a base.

Answer:

B water density increases and rises to the top of the sea

Explanation:

i took a test and got it correct lol

Answer:

461.91 Kelvin

Explanation:

P = 7.30 atm

V = 21.7 liters

n = 4.15 moles

R = 0.0821 atm

T = ?

PV = nRT

(7.30) (21.7) = (4.15) (0.0821) (T)

158.41 = 0.34 (T)

T = 465.91 Kelvin

LOL... I don't think my beautiful drawing helps a ton.

But basically in a potential energy diagram, the height distance between the reactants and products is the ∆H, aka the enthalpy change.

If the reactants are higher than products, then the reaction is exothermic.

If the products are higher than reactants, then the reaction is endothermic.

Based on the chemical equation, to balance the equation we use 2 as a coefficients of HCl on left hand side of reaction.

Balanced chemical equations are those equation in which each entities are present in same amount on left side as well as on the right side of the chemical reaction.

Given chemical reaction is:

Zn + HCl → ZnCl₂ + H₂

Above reaction is not balanced equation as number of chlorine and hydrogen atoms are not same, so balanced equation will be:

Zn + 2HCl → ZnCl₂ + H₂

Hence we add 2 as a coefficient of HCl to balance the equation.

To know more about balance equation, visit the below link:
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Answer:

1 2 1 1

Explanation:

im yes hi okay no bye

Bitter taste, high pH, and caustic Bitter are the characteristics of base.

Bases have bitter taste, soapy feel, turn red litmus paper blue. Bases are substances that contain metal oxides or hydroxides. Its pH is higher than 7 up to 14.

So we can conclude that bitter taste, high pH, and caustic Bitter are the characteristics of base.

Learn more about base here: https://brainly.com/question/3948796

Answer:

Bitter taste, high pH, and caustic

Explanation:

I took the test :)

Which of these involves the formation of a new chemical substance?

a. evaporation of gasoline

b. mixing salt and pepper

c. dissolving sugar in tea

d. rusting of an iron chain

[tex] \\ [/tex]

[tex]__________[/tex]

A. Evaporation of gasoline

B. Mixing salt and pepper

C. Dissolving sugar in tea

D. Rusting of an iron chain

Hence, the answer is D. Rusting of an iron chain.

Answer:

Milk's boiling temperature is nearly identical to that of water, 100 degrees Celsius (212 degrees Fahrenheit)

Explanation:

The reaction equation is:

HI(aq) + KOH(aq) → KI(aq) + H2O

1 mol HI reacts with 1 mol KOH

In your problem you have:

Mol HI in 10 mL of 1M solution = 10mL/ 1000 mL/L * 1 mol /L = 0.01 mol HI

Mol KOH in 5 mL of 1 M solution = 5 mL / 1000 mL/L * 1 mol /L = 0.005 mol HI

The 0.005 mol of KOH will neutralise 0.005 mol of HI - leaving 0.005 mol HI unreacted in 15 mL solution

This solution will be acidic

I guess that that answers your question - But you may be interested in calculating the pH of the solution

Have a great day!

Explanation:

From PV = nRT

9.67V = 12(0.0821)(467.5)

V = 47.63 L

Answer:

44.2 g NO

Explanation:

Question is posted elsewhere, be sure to search before posting to save yourself some time :)

Answer:

Dispersion forces are present between all molecules, whether they are polar or nonpolar. Larger and heavier atoms and molecules exhibit stronger dispersion forces than smaller and lighter ones.

Explanation:

hope this helps

The maximum pH an aqueous solution of 0.050 M Cu(NO3)2  is mathematically given as

pH=5.8

Generally, the equation for the Chemical reaction  is mathematically given as

Cu(OH)2----><---Cu^2 +2OH-

Therefore

s^2=1.0*10^{-19}

s=3.16*10^{=9}

{OH-}=2s=6.3*10^10^{-19}

{H+}=10^{-14}/OH

{H+}=1.58*10^{-6}

In conclusion

pH=-log(1.58*10^{-6}

pH=5.8

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