What’s this key name !!!!!

Answer:

if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mercury. That's because Mercury weighs less than Earth, and therefore its gravity would pull less on your body. If, on the other hand, you were on heavy Jupiter, you would weigh a whopping 253 pounds!

Answer:

mass

Explanation:

Answer:

C Mass

Explanation:

mass wont change when a force is put upon it.

Explanation:

5g C7H8 / 92g/mole = 0.054moles

total moles = 0.232moles

mole fraction C6H12 = 0.178moles / 0.232moles = 0.767

mole fraction C7H8 = 0.233

Answer:

pH = 11.216.

Explanation:

Hello there!

In this case, according to the ionization of ammonia in aqueous solution:

[tex]NH_3+H_2O\rightleftharpoons NH_4^++OH^-[/tex]

We can set up its equilibrium expression in terms of x as the reaction extent equal to the concentration of each product at equilibrium:

[tex]Kb=\frac{[NH_4^+][OH^-]}{[NH_3]} \\\\1.80x10^{-5}=\frac{x*x}{0.150-x}[/tex]

However, since Kb<<<1 we can neglect the x on bottom and easily compute it via:

[tex]1.80x10^{-5}=\frac{x*x}{0.150}\\\\x=\sqrt{1.80x10^{-5}*0.150}=1.643x10^{-3}M[/tex]

Which is also:

[tex][OH^-]=1.643x10^{-3}M[/tex]

Thereafter we can compute the pOH first:

[tex]pOH=-log(1.643x10^{-3}M)\\\\pOH=2.784[/tex]

Finally, the pH turns out:

[tex]pH=14-2.784\\\\pH=11.216[/tex]

Regards!

Answer:

The concentration increases because the solution becomes more pure because the solvent leaves the solution.

Explanation:

Answer:

It’s 10

Explanation:

I looked it up

To solve this we must be knowing each and every concept related to  energy and its calculations. Therefore,  at point b, 10joule of energy is present.

Energy is defined in physics as the ability to accomplish work or heat items. It's a scalar measurement with magnitude but no direction. Energy is maintained, which implies it can change forms but is not generated or destroyed. potential energy transforms into kinetic energy.

One type of energy can be transferred into another without breaking a thermodynamic rule. Not all of these energy sources are equally beneficial in practical applications. At point a the object has 30 joules of energy. At point b, 10joule of energy is present.

Therefore,  at point b, 10joule of energy is present.

To learn more about energy, here:

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Answer: 126.1 grams of are needed to make 5.3 L of 0.25 M solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

To calculate the mass of solute for given molarity, we use the equation:

[tex]\text{Molarity of the solution}=\frac{\text{given mass of solute}}{\text {Molar mass of solute}\times \text{Volume of solution in L}}[/tex]

[tex]0.25M=\frac{x}{95.2g/mol\times 5.3L}[/tex]

[tex]x=126.1g[/tex]

Thus 126.1 grams of are needed to make 5.3 L of 0.25 M solution

Answer: D

Explanation: pH = - log( c). If c= 1.0 M. PH = 0, if c=0.001 M. PH = 3

Answer:b

Explanation:

ik

Answer:

B) It will increase.

Explanation:

Solubility tends to increase with an increase in temperature

Answer:

6 volts

Explanation:

Use Ohm's Law:

V = IR

V = (2 amps)(3 ohms) = 6 volts

Answer:

33.0 L

Explanation:

Step 1: Given data

Step 2: Convert the temperatures to the Kelvin scale

We will use the following expression.

K = °C + 273.15

T₁: K = 25.00°C + 273.15 = 298.15 K

T₂: K = 55.00°C + 273.15 = 328.15 K

Step 3: Calculate the final volume of the balloon

If we assume ideal behavior, we can calculate the final volume of the balloon using Charles' law.

V₁/T₁ = V₂/T₂

V₂ = V₁ × T₂/T₁

V₂ = 30.0 L × 328.15 K/298.15 K = 33.0 L

Answer:

Ratio = 2 : 3 (Approx.)

Explanation:

Given:

Compound A = 1.278 g

Compound B = 1.904

Find:

Ratio

Computation:

Ratio = Compound A / Compound B

Ratio = 1.278 / 1.904

Ratio = 2 : 3 (Approx.)

Answer:

i don't no the

answer

i am sorry

Answer:

Saturated fats:  Saturated fats are a type of fat-containing a high proportion of fatty acid molecules without double bonds, considered to be less healthy in the diet than unsaturated fat.

Unsaturated fats: Unsaturated fats are a type of fat-containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.

Solution :

It is given that :

Weight of the antacid tablet = 5.4630 g

4.3620 gram of antacid is crushed and is added to the stomach acid of 200 mL and is reacted.

25 mL of the stomach acid that is partially neutralized required 13.6 mL of NaOH to be titrated for a red end point.

27.7 mL of [tex]$NaOH$[/tex] solution is equivalent to [tex]$25 \ mL$[/tex] of the original stomach acid. Therefore, 13.6 mL of NaOH will take x [tex]$\frac{25\text{ mL of original stomach acid}}{\text{27.7 mL of NaOH}}$[/tex]

                                                             = 12.27 ml of the original stomach acid.

Answer:

[tex]v = s \div t[/tex]

[tex]t = s \div v[/tex]

[tex]t = 300 \div 1500 = 0.2s[/tex]

Answer:

See explanation

Explanation:

We can convert cyclohexanol to cyclohexene in the presence of a strong acid such as sulfuric acid catalyst in a test tube at 60 oC by heating up the mixture to about 80 oC. This is a dehydration reaction so water is removed  to yield the alkene. A drying agent is used to remove any trace amount of water left in the system. This overall reaction is endothermic.

Also, the reverse is the case when we want to carry out the hydration of cyclohexene to yield cyclohexanol. The overall reaction is exothermic and involves the addition of more water to the alkene and then cooling down the system to about 40 oC.

Answer:

In the reaction between vinegar and baking soda, the reactants are vinegar (acetic acid) and baking soda (sodium bicarbonate). The products are sodium acetate, water, and carbon dioxide gas.

Answer:

B

Explanation:

Answer:

0.998 atm.

Explanation:

NOTE: The temperature is missing in the above question and the value is 20 °C

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

Volume (V) = 10.0 L

Number of mole of H₂ = 0.2 mole

Number of mole N₂ = 0.215 mole

Temperature (T) = 20 °C

Total pressure (P) =?

Next, we shall determine the total number of mole in flask. This can be obtained as follow:

Number of mole of H₂ = 0.2 mole

Number of mole of N₂ = 0.215 mole

Total number of mole (n) =?

n = mole of H₂ + mole of N₂

n = 0.2 + 0.215

n = 0.415 mole

Thus, the total number of mole in the flask is 0.415 mole

Next, we shall convert 20 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Temperature (T) = 20 °C + 273

Temperature (T) = 293 K

Finally, we shall determine the total pressure in the flask. This can be obtained as follow:

Volume (V) = 10.0 L

Total number of mole (n) = 0.415 mole

Temperature (T) = 293 K

Gas constant (R) = 0.0821 atm.L/Kmol

Total pressure (P) =?

PV = nRT

P × 10 = 0.415 × 0.0821 × 293

Divide both side by 10

P = (0.415 × 0.0821 × 293) / 10

P = 0.998 atm.

Therefore, the total pressure in the flask is 0.998 atm.

V1/T1 = V2/T2

V1 = 350. mL

T1 = 25 + 273 = 298 K

V2 = 250. mL

T2 = ?

Solve the equation for T2: T2 = V2T1/V1 = (250. mL)(298 K)/(350. mL) = 213 K = -60°C

14900 g AgNO₃

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 5.29 × 10²⁵ molecules AgNO₃

[Solve] grams AgNO₃

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of Ag - 107.87 g/mol

[PT] Molar Mass of N - 14.01 g/mol

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of AgNO₃ - 107.87 + 14.01 + 3(16.00) = 169.88 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

14923 g AgNO₃ ≈ 14900 g AgNO₃

Answer:

b

Explanation:

Answer:

answer b I think so I'm.not clear about it ,I think its CRT ans plz follow me

The number of grams of  Ba₃(PO₄)₂ that is produced is : 0.4328 gram

Given data

mass of Na₃PO₄.12H₂O = 0.629 grams

mass of BaCl₂.2H₂O = 0.527 grams

molar mass of Na₃PO₄.12H₂O = 380.12 g/mol

molar mass of BaCl₂.2H₂O = 244.26 g/mol

mole of Na₃PO₄.12H₂O = mass / molar mass

                                        = 0.629 / 380.12 = 0.001654 mol

molar mass of BaCl₂.2H₂O = 0.527 / 244.26 = 0.002157 mol

After mixture : Determine the limiting reactant by lower mole ratio

mole ratio of BaCl₂.2H₂O = 0.002157 / 3

                                          = 0.0007191

mole ratio of Na₃PO₄.12H₂O = 0.001654 / 2

                                               = 0.000827

therefore the limiting reactant is : BaCl₂.2H₂O

Final step : Determine the mass of BaCl₂.2H₂O

molar mass of BaCl₂.2H₂O = 601.93 g/mol

Therefore :

mass of BaCl₂.2H₂O = moles * molar mass

                                   = 0.0007191 * 601.93

                                   = 0.4328 gram

Hence we can conclude that The number of grams of  Ba₃(PO₄)₂ that is produced is : 0.4328 gram

Learn more about Barium Chloride Dihydrate :https://brainly.com/question/15394880

Answer:

Oxygen and chlorine

Explanation:

oxygen and chlorine are most likely to form covalent compounds

Answer:

50 I think not 100% sure

Explanation:

Because you just do 10*5 which equals 50.

Answer:

49.1 g

Explanation:

First we convert 9.67x10²³ atoms of oxygen into moles, using Avogadro's number:

Then we calculate how many P₃O₉ moles there would be with 1.60 O moles:

Finally we convert 0.18 P₃O₉ moles into grams, using its molar mass:

Hello,

Whatever the chemical entity, one mole of an entity contains 6.02 x 10²³ entities, this is the Avogadro constant (Na).  

N = 2 x Na

There are therefore 1.204 x 10²⁴ molecules of water in 2 moles of water.

Answer:

The cumulonimbus cloud

Explanation:

The cumulonimbus cloud, or thunderstorm, is a convective cloud or cloud system that produces rainfall and lightning. It often produces large hail, severe wind gusts, tornadoes, and heavy rainfall.

pls mark brainliest

Answer:

cumulonimbus clouds

Explanation:

that's the answer.