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
Hoochie [10]
3 years ago
11

Which of the following is true about compounds

Chemistry
1 answer:
Anastasy [175]3 years ago
3 0
Compounds are composed of 2 or more different elements, ionically and or covalently bonded that results in substances containing elements in their respective definite amounts within the compound.
You might be interested in
Calculate the amount of water required to prepare 500g of 2.5% solution of sugar.
Snowcat [4.5K]

(i) We start by calculating the mass of sugar in the solution:

mass of sugar = concentration × solution mass

mass of sugar = 2.5/100 × 500 = 12.5 g  

Then now we can calculate the amount of water:

solution mass = mass of sugar + mass of water

mass of water =  solution mass - mass of sugar

mass of water = 500 - 12.5 = 487.5 g

(ii) We use the following reasoning:

If       500 g solution contains 12.5 g sugar

Then    X g solution contains 75 g sugar

X=(500×75)/12.5 = 3000 g solution

Now to get the amount of solution in liters we use density (we assume that is equal to 1):

Density = mass / volume

Volume = mass / density

Volume = 3000 / 1 = 3000 liters of sugar solution

8 0
2 years ago
What particles make up the atomic nucleus
White raven [17]
The particles that make up the atomic nucleus of all atoms are both protons and neutrons.
4 0
3 years ago
Read 2 more answers
∆G° for the process benzene (l) benzene (g) is 3.7 Kj/mol at 60 °C , calculate the vapor pressure of benzene at 60 °C [R=0.0821
Alex787 [66]

Answer:

4) 0.26 atm

Explanation:

In the process:

Benzene(l) → Benzene(g)

ΔG° for this process is:

ΔG° = -RT ln Q

<em>Where Q = P(Benzene(g)) / P°benzene(l) P° = 1atm</em>

ΔG° = 3700J/mol = -8.314J/molK * (60°C + 273.15) ln P(benzene) / 1atm

1.336 = ln P(benzene) / 1atm

0.26atm = P(benzene)

Right answer is:

<h3>4) 0.26 atm </h3><h3 />
6 0
2 years ago
The size (radius) of an oxygen molecule is about 2.0 ×10−10m. Make a rough estimate of the pressure at which the finite volume o
belka [17]

Answer:

Explanation:

We can calculate the volume  of the oxygen molecule as the radius of oxygen molecule is given as 2×10⁻¹⁰m.

We know that volume=4/3×πr³

volume =4/3×π(2.0×10⁻¹⁰m)³

volume=33.40×10⁻³⁰m³

Volume of oxygen molecule=33.40×10⁻³⁰m³

we know the ideal gas equation as:

PV=nRT

k=R/Na

R=k×Na

PV=n×k×Na×T

n×Na=N

PV=Nkt

p is pressure of gas

v is volume  of gas

T is temperature of gas

N is numbetr of molecules

Na is avagadros number

k is boltzmann constant =1.38×10⁻²³J/K

R is real gas constant

So to calculate pressure using the  formula;

PV=NkT

P=NkT/V

Since there is only one molecule of oxygen so N=1

P=[1×1.38×10⁻²³J/K×300]/[33.40×10⁻³⁰m³

p=12.39×10⁷Pascal

8 0
3 years ago
A student throws a 2kg ball at 4m/s. What is the ball’s momentum?
Vsevolod [243]
The answer is 8 m/s2
4 0
3 years ago
Other questions:
  • A. Use average bond energies together with the standard enthalpy of formation of C(g) (718.4 kJ/mol ) to estimate the standard e
    11·1 answer
  • 9. What lab equipment is used to spread heat when heating to prevent glassware from cracking
    12·1 answer
  • Which description refers to fog?
    7·1 answer
  • How many atoms make up a diatomic molecule?
    7·1 answer
  • An alien civilization has different names and symbols for six elements. Place each element in the correct location in the period
    15·2 answers
  • Which of the following is an
    7·2 answers
  • List six elements with only 1 electron in an s orbital
    10·1 answer
  • When bacteria reproduces asexually are the offspring uniform or diverse?
    5·2 answers
  • Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?
    12·1 answer
  • 1s22s22p63s23p3<br> what element does this represent
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!