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
timama [110]
3 years ago
7

Please answers the question​

Chemistry
1 answer:
frozen [14]3 years ago
8 0
That is correct hope that helps
You might be interested in
What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0.250 m solution?1.90 g4.94 g1.19 g2.02 g8.42 g
atroni [7]

Answer:

2.02 g

Explanation:

Molality (m) is the <em>number of moles of solute dissolved in 1 kg (1000 g) of solvent- </em>that is,

molality = moles of solute ÷ mass of solvent (kg)

<em> </em>

Our first step is to calculate the moles of NH₃ in 475 grams of methanol, using <u>molality</u> as a conversion factor.

0.250 mol/kg × 0.475 kg = 0.119 mol

This solution contains <u>0.119 moles of NH₃</u>. Now we must convert the moles to grams, using the <u>molar mass of NH₃</u> as a conversion factor .

17.031 g/mol × 0.119 mol = 2.02 g

Therefore, 2.02 grams of NH₃ must be dissolved in 475 grams of methanol to make a 0.250 m solution.

5 0
4 years ago
If the ph of a 1.00-in. rainfall over 1400 miles2 is 3.70, how many kilograms of sulfuric acid, h2so4, are present, assuming tha
Natali5045456 [20]

At pH 3.70, H2SO4 can be regarded as being fully dissociated. The dissociation reaction is
H₂SO₄(l) --> 2H⁺(aq) + SO₄²⁻(aq)
Since pH = -log₁₀[H⁺]
[H⁺] = 10^{-pH}
= 10^{-3.7}
[H⁺] = 2 x 10⁻⁴ M
Since there are 2 moles of H⁺ for every mole of H₂SO₄
[H₂SO₄] = 0.5 * [H⁺]
=0.5 * 2 x 10⁻⁴ M
[H₂SO₄] = 1 x 10⁻⁴ M
Convert the amount of rain and the area into SI units
Rain = 1.00 in * 0.0254 m/in
Rain = 0.0254 m
Area = 1600 miles² * 2589988.11 m²/miles²    = 4.661 x 10⁹  m²

Calculate the volume of water

Volume = Rain * Area
=0.0254 m * 4.661 x 10⁹
Volume = 1.184 x 10⁸ m³

Calculate the number of kilo moles of H₂SO₄

kilo moles H₂SO₄ = [H₂SO₄] * Volume
=1.0 x 10⁻⁴ M * 1.184 x 10⁸ m³
kilo moles H₂SO₄ = 11,839 k mole

Calculate the mass of H₂SO₄

mass H₂SO₄ = kilo moles H₂SO₄ * MW H₂SO₄
= 11839 k mol * 98.07848 kg/kmol
mass H₂SO₄ = 1.16 x 10⁶ kg H₂SO₄

5 0
3 years ago
What is the reactant that runs out first in a reaction called?
miv72 [106K]

Answer:

limiting reactant

3 0
3 years ago
ASAP MULTIPLE CHOICE
OleMash [197]
The mass of electrons , i just did the same test and got it right
7 0
3 years ago
The temperature of a 500 ml sample of gas increases from 150 k to 300 k. what is the final volume of the sample of gas, if the p
seropon [69]
Upon a constant pressure (P), volume (V) of a gas will vary in direct proportion to changes in temperature (T). So V1/T1 = V2/T2
V2 = V1T2/T1 = (500)(300)/150
V2 = 150000/150 = 1000 mL
5 0
3 years ago
Other questions:
  • If the half-life of technitium-104 is 18.0 min, how much of a 14.2-g sample will remain after 72 minutes?
    12·2 answers
  • What is an example of a solution?
    13·1 answer
  • 16. In a reaction that has reached equilibrium,
    6·2 answers
  • In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to rig
    5·1 answer
  • You weigh a 24K gold chain and find that it weighs 400 grams. Determine home many moles of gold atoms you have
    7·1 answer
  • URGENT** If you have 35.0g of Na and 100.0g of Cl2, what is the maximum amount of NaCl that you can produce?
    13·2 answers
  • Which is a factor on determining the average atomic mass of an element
    6·1 answer
  • What is natural selection help plz help
    8·2 answers
  • SOMEONE PLZZ help me on this chemistry test I need to pass it to be able to get my grade up :(((
    14·1 answer
  • Which statement is true about the potential energy diagram for an exothermic reaction? (5 points)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!