What is the molality of a solution of naphthalene dissolved in chloroform if the solution has a boiling point of 63.2 °C?

Answer:

Single replacement reaction (aka single displacement reaction)

Explanation:

In a single replacement reaction, one element is substituted for another in a compound to create a new compound and a new element in the products. The general form is:

A + BC --> B + AC

In the case of this question, Cr and Fe "trade places."

Answer:

They may not have any predators.

Explanation:

Answer:

12 g of 12C to three significant figures maybe?

Explanation:

tell if correct or not im sorry fi it isnt :c

Answer

2.1 x 10 ^23

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Sound travels fastest through solids.

it would be cold gasses because of how air at 0 is faster then at 100

Answer:

f a runner decreases his velocity from +20 m/s to +10 m/s, with average acceleration is -5m/s².

Explanation:

Answer:

uranium is classifide as actinide a chemical element atomic number 92 and is a solid at room temperature

The less mass an object has, the greater its gravitational force.

Answer:

10 volts

Explanation:

V= P/I

V = 20/2 = 10 volts

Answer:

A

Explanation:

bc

Answer: 2.6 ppm

Explanation: ppm is parts per million, also 1:1000 000.

It means 1 mg in 1000 000 mg is same as 1 mg in 1000 g

Assume 2.0 litres weighs 2.0 kg = 2000 g

In one litre there is 2.6 mg Cl. You get a proportion 2.6 mg :1000 g

The concentration of chlorine is 2.6 ppm.

Concentration can be calculated in terms of Parts per million, or ppm, that is a measurement of dissolved solids in solution expressed as a ratio of the count of parts of solids/solute to one million parts of total volume.

The concentration can be calculated by using the formula:

C = m / v

where, C is concentration, m is mass and v is volume.

Calculation of concentration is shown as:

By using the formula, C = m / v

Put the values of m = 5.2 mg and v = 2 L in concentration formula.

C = 5.2 mg  / 2 L

C = 2.6 ppm

Therefore, the concentration of solution will be 2.6 ppm.

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Answer Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. ... Relative dating places events or rocks in their chronologic sequence or order of occurrence. Absolute dating places events or rocks at a specific time.: Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.With absolute age dating, scientists determine the absolute age of a rock in millions of years before present rather than just the age of the rock relative to the rock units around it. This information helps geologists develop more precise geological history models for the rocks and regions they study.

hope this helps u have a nice night❤️

Explanation:

Answer:

A is the answer

Explanation:

Pls mark BRAINLIEST

Answer:

Answer is C. C5H8 + 7O2 -> 5CO2 + 4H2O

Answer:

3.96 M

Explanation:

Step 1: Given data

Step 2: Calculate the concentration of the diluted solution

We can calculate the concentration of the diluted solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁/V₂

C₂ = 8.9 M × 76 mL/171 mL = 3.96 M

Answer:

446 mmHg

Explanation:

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

Total pressure (Pₜ) = 871 mmHg

Partial pressure of He (Pₐ) = 281 mmHg

Partial pressure of N₂ (P₆) = 144 mmHg

Partial pressure of O₂ (P꜀) =?

The partial pressure of O₂ can be obtained as follow:

Pₜ = Pₐ + P₆ + P꜀

871 = 281 + 144 + P꜀

871 = 425 + P꜀

Collect like terms

P꜀ = 871 – 425

P꜀ = 446 mmHg

Therefore, the partial pressure of O₂ in the mixture is 446 mmHg

Answer:

Goose

Explanation:

following yes on the key,

feather: yes -> swims

Swims: yes -> goose

Answer: The molarity of [tex]HCl[/tex] is 0.07 M

Explanation:

According to the neutralization law,

[tex]n_1M_1V_1=n_2M_2V_2[/tex]

where,

[tex]n_1[/tex] = basicity [tex]HCl[/tex] = 1

[tex]M_1[/tex] = molarity of [tex]HCl[/tex] solution = ?

[tex]V_1[/tex] = volume of  [tex]HCl[/tex] solution = 25.0 ml

[tex]n_2[/tex] = acidity of [tex]NaOH[/tex] = 1

[tex]M_1[/tex] = molarity of [tex]NaOH[/tex] solution = 0.1000 M

[tex]V_1[/tex] = volume of  [tex]NaOH[/tex] solution = 17.5 ml

Putting in the values we get:

[tex]1\times M_1\times 25.0=1\times 0.1000\times 17.5[/tex]

[tex]M_1=0.07M[/tex]

Therefore, molarity of [tex]HCl[/tex] is 0.07 M

I think it's either b or c

Answer:

b!

Explanation:

Answer:

c - both rock types

Explanation:

when weathered and eroded they can become sediments!

Answer:

decomposition reaction.

Explanation:

It is a decomposition reaction as potassium chlorate compound breaks to form potassium chloride and oxygen. This reaction requires heat as source of energy to break down the compound so it is endothermic in nature.

Answer:

c = 325.0 m/s.

Explanation:

Hello there!

In this case, since the frequency, velocity and wavelength are related via:

[tex]c=\lambda *f[/tex]

Whereas c is the velocity, lambda the wavelength and f the frequency. Thus, we plug in the given data to obtain:

[tex]c=3250s^{-1}*0.1m\\\\c=325.0m/s[/tex]

Best regards!

200 g CuSO₄ · 5H₂O

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Organic

Reactions

Stoichiometry

Step 1: Define

[Given] 1 mol CuSO₄ · 5H₂O (Copper II sulfate pentahydrate)

Step 2: Identify Conversions

[PT] Molar Mass of Cu - 63.55 g/mol

[PT] Molar Mass of S - 32.07 g/mol

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

[PT] Molar Mass of H - 1.01 g/mol

Molar Mass of CuSO₄ - 63.55 + 32.07 + 4(16.00) = 159.62 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

Step 3: Convert

There is 5 moles of water added for every one mole of Copper II Sulfate present.

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

249.72 g CuSO₄ · 5H₂O ≈ 200 g CuSO₄ · 5H₂O

Answer:

35.36 g

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

8Fe + S₈ —> 8FeS

Next, we shall determine the mass of Fe that reacted and the mass of FeS produced from the balanced equation. This can be obtained as follow:

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 8 × 56 = 448 g

Molar mass of FeS = 56 + 32 = 88 g/mol

Mass of FeS from the balanced equation = 8 × 88 = 704 g

SUMMARY:

From the balanced equation above,

448 g of Fe reacted to produce 704 g of FeS.

Finally, we shall determine the theoretical yield of FeS as follow:

From the balanced equation above,

448 g of Fe reacted to produce 704 g of FeS.

Therefore, 22.5 g of Fe will react to produce = (22.5 × 704)/448 = 35.36 g of FeS.

Thus, the theoretical yield of FeS is 35.36 g

Answer:

group number

the octet rule

total number of bonds

fewest valence electrons

Explanation:

When drawing the Lewis structure of a molecule, start by determining the total number of available valence based on each element's group number Then, use the total number of electrons needed for each element to be stable, generally based on the octet rule to determine the total number of bonds by finding the difference between the number of needed and available electrons divided by two. Next, identify the central atom, which is the element with the fewest valence electrons other than hydrogen. Finally, arrange the number of bonds around the central atom to fulfill the stable number of electrons for each element.

Answer:

Double-Replacement Reaction

Explanation:

Mg is Oxidized, and O2 is the cause of the oxidation, hence the Oxidizing agent.  That means that O2 is Reduced and Mg is the cause naming it the Reducing agent.

OIL - RIG   Oxidation is Loss-Reduction is Gain