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
Semenov [28]
3 years ago
9

A sample of nitrogen gas contains 9.46x10^23 atoms of nitrogen. How much nitrogen is expressed in grams? round your answer to th

e nearest whole number.
Chemistry
1 answer:
Alexxx [7]3 years ago
6 0
  • No of. atoms=9.46×10^23

We know

\boxed{\star{\sf No\;of\:atoms=No\:of\: moles\times Avagadro's\: number}}

\\ \rm\Rrightarrow No\:of\;moles=\dfrac{No\:of\:atoms}{Avagadro's\:no}

\\ \rm\Rrightarrow No\:of\:moles =\dfrac{9.46\times 10^{23}}{6.022\times 10^{23}}

\\ \rm\Rrightarrow No\:of\:moles=1.6mol

Again

\boxed{\star{\sf Mass=Molar\:mass\times No\:of\:moles}}

\\ \rm\Rrightarrow Mass=1.6(14)

\\ \rm\Rrightarrow Mass=22.4g

You might be interested in
Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate the quantity of heat produce
Elodia [21]

Answer:  600 kJ

-

Explanation:

                        C₃H₈ (g)  + 5 O₂ (g) =============== 3 CO₂ (g)  +  4 H₂O (l)

Δ⁰Hf   kJ/mol       -104             0                                       -393.5         -285.8

Δ⁰Hcomb C₃H₈ = 3(-393.5) + 4 (-285.80) - (-104)  kJ/mol

Δ⁰Hcomb = 2219.70 kJ/mol

n= m /MW   MW c₃H₈ = 44.1 g/mol

n= 12 g/44.1 g/mol = 0.27 mol

then for 12 g the heat released will be

0.27 mol x 2219.70 kJ/mol =  600 KJ

4 0
3 years ago
Read 2 more answers
If a solution has a pH of 10, is the solution acidic or basic?Explain why
natka813 [3]
Basic because a pH greater than 7 is basic
5 0
3 years ago
What products result from mixing aqueous solutions of Cr(NO3)2(aq) and NaOH(aq)? Question 10 options: Cr(OH)2(s), Na+(aq), and N
Alecsey [184]

Answer:

Cr(OH)2(s), Na+(aq), and NO3−(aq)

Explanation:

Let is consider the molecular equation;

2NaOH(aq) + Cr(NO3)2(aq) -----> 2NaNO3(aq) + Cr(OH)2(s)

This is a double displacement or double replacement reaction. The reacting species exchange their partners. We can see here that both the sodium ion and chromium II ion both exchanged partners and picked up each others partners in the product.

Sodium ions and nitrate ions now remain in the solution while chromium II hydroxide which is insoluble is precipitated out of the solution as a solid hence the answer.

4 0
4 years ago
What class of enzyme catalyzes addition of oxygen?
bulgar [2K]

Answer:

The answer is Lyase

Explanation:

Any enzyme that catalyzes the addition or removal of the elements water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds, as defined in physiology. Decarboxylases, for example, remove carbon dioxide from amino acids, while dehydrases eliminate water.

8 0
3 years ago
Help me with this question?!!​
olya-2409 [2.1K]

Answer:

500 mL

Explanation:

Step 1: Find conversions

1 mL = 0.0338 oz

Step 2: Use Dimensional Analysis

16.9 \hspace{2} oz(\frac{1 \hspace{2} mL}{0.0338 \hspace{2} oz} ) = 500 mL

3 0
3 years ago
Other questions:
  • A strike slip fault is a result of
    12·1 answer
  • You know that energy cannot be created or destroyed, so what happens to it?
    5·2 answers
  • Help me please fast​
    11·1 answer
  • _____ net forces cause objects to change their motion. A. Zero B. Applied C. Balanced D. Unbalanced
    13·2 answers
  • Please help! Thank you!
    5·2 answers
  • How many significant numbers are there in 40.00
    15·2 answers
  • The density of mercury is 13.6 g/cm3, What is its density in mg/mm3?
    9·1 answer
  • Which wind belt do we live in<br>​
    10·2 answers
  • What is the pressure, in atm, of 24.5 L of ideal gas at 247.8 K if there are 1.8 moles present?
    10·1 answer
  • Prepare a project report on various samples of
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!