1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kisachek [45]
3 years ago
11

I have these answered, but I'd like someone to check them for me? Plz and thanks :)

Chemistry
1 answer:
zlopas [31]3 years ago
4 0
1. The third option is the least soluble in water because it is the chain with the most number of hydrocarbons. Next is the second option while the first one is the most soluble.
2. Statements 1 and 2 are true. The third option is not true all the time because it depends on the structure of the compound.
You might be interested in
The table shows the average number of pounds of trash generated per person per day in the United States from 1970 to 2010. Use t
REY [17]
Is there supposed to be a table attached???

can’t help u
4 0
3 years ago
Calculate the mass in grams of 2.56 × 10 −3 mol of iron.
gizmo_the_mogwai [7]

Answer:

1.43 grams

Explanation:

Fe = 55.8 grams Fe = 1 mole Fe

2.56 • 10^-3 moles Fe / 1 • 55.8 grams Fe / 1 mole Fe = 1.43 grams Fe

Basically, you're just multiplying the molar mass of Fe (iron) by the moles of 2.56 • 10^-3 Fe, to find how many grams are in it.

2.56 • 10^-3 moles Fe = 1.43 grams Fe

5 0
2 years ago
Given the thermochemical equations below, What is the standard heat of formation of CuO(s)? 2 Cu2O(s) + O2(g) ---> 4 CuO(s) ∆
OlgaM077 [116]

-130KJ is the standard heat of formation of CuO.

Explanation:

The standard heat of formation or enthalpy change can be calculated by using the formula:

standard heat of formation of reaction = standard enthalpy of formation of product - sum of enthalpy of product formation

Data given:

Cu2O(s) ---> CuO(s) + Cu(s) ∆H° = 11.3 kJ

2 Cu2O(s) + O2(g) ---> 4 CuO(s) ∆H° = -287.9 kJ

CuO + Cu ⇒ Cu2O (-11.3 KJ)      ( Formation of Cu2O)

When 1 mole Cu20 undergoes combustion 1/2 moles of oxygen is consumed.

Cu20 + 1/2 02 ⇒ 2CuO (I/2 of 238.7 KJ) or 119.35 KJ

So standard heat of formation of  formation of Cu0 as:

Cu + 1/2 02 ⇒ CuO

putting the values in the equation

ΔHf = ΔH1 + ΔH2     (ΔH1 + ΔH2  enthalapy of reactants)

heat of formation = -11.3 + (-119.35)

                            = - 130.65kJ

-130.65 KJ is the heat of formation of CuO in the given reaction.

7 0
3 years ago
Read 2 more answers
The total pressure of a confined mixture of gases is the sum of the pressures of each of the gases in the mixture. This is known
olganol [36]

Answer:

D

Explanation:

It is also known as the Dalton’s law of partial pressure. Given a confinement that contains a mixture of gases which do not mix, the total pressure equals the sum of the individual pressures.

The term, which do not mix is necessary because, if the gases are the type that mix, the law will no longer hold as they would have given up their individual identities and hence their individual partial pressure cannot be use to access them anymore.

Hence, the law helps to sum the totality of the pressures of a number of gases which exists together in a confinement and they do not mix. Say we have 3 gases A, B and C. The total pressure is the sum of pressure A, pressure B and pressure C.

5 0
3 years ago
scientist has discovered a new molecular compound that is a long chain of 26 carbons bonded together, with a methyl group on one
Lelechka [254]

Answer:

Fatty acid  

Explanation:

A fatty acid is a carboxylic acid with a long chain of 12 or more carbons.

If the molecule has no other distinguishing features, the compound is hexacosanoic acid, CH₃(CH₂)₂₄COOH.

8 0
3 years ago
Other questions:
  • Which of the following are uses for radiation and radioactivity that are of benefit to us?
    14·1 answer
  • How calculate how many milliliters of glycerin (specific gravity=1.26) will have a mass of 0.75 lbs?
    11·1 answer
  • According to periodic trend, which of the following most likely has the highest ionization energy?
    15·2 answers
  • There is a old phrase digging a hole through the earth's center would bring you out in china if you could drill a hole from long
    7·1 answer
  • What is the volume in milliliters of 7.26 g of acetone? (Acetone has a density of 0.7857 g/cm^3)
    5·2 answers
  • Help please if you can answer this first I'll give you the brainliest
    6·2 answers
  • I don’t get this lesson so can somebody help me with the answer plz
    15·1 answer
  • Do we need nuclear energy to stop climate change?
    10·1 answer
  • What is the molarity of a sodium hydroxide solution if 30.0 mL of the solution is neutralized by 26.4 mL of 0.250M hydrochloric
    6·1 answer
  • What is defined as the basic unit in the metric system that describes a quality
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!