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3 years ago

Which statement best describes how Carl Woese changed the system of classification?

Chemistry

2 answers:

Nadya [2.5K]3 years ago

8 0

Answer: C.)

Explanation:

i got it right on a unit test!

but it might be something else if there arranged different!

sorry!

Fudgin [204]3 years ago

7 0

Answer:

Explanation:

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Catalyst

Hoochie [10]

a. volume of NO : 41.785 L

b. mass of H2O : 18 g

c. volume of O2 : 9.52 L

<h3>Further explanation</h3>

Given

Reaction

4 NH₃ (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)

Required

a. volume of NO

b. mass of H2O

c. volume of O2

Solution

Assume reactants at STP(0 C, 1 atm)

Products at 1000 C (1273 K)and 1 atm

a. mol ratio NO : O2 from equation : 4 : 5, so mo NO :

$\tt \dfrac{4}{5}\times 0.5=0.4$

volume NO at 1273 K and 1 atm

$\tt V=\dfrac{nRT}{P}=\dfrac{0.4\times 0.08206\times 1273}{1}=41.785~L$

b. 15 L NH3 at STP ( 1mol = 22.4 L)

$\tt \dfrac{15}{22.4}=0.67~mol$

mol ratio NH3 : H2O from equation : 4 : 6, so mol H2O :

$\tt \dfrac{6}{4}\times 0.67=1$

mass H2O(MW = 18 g/mol) :

$\tt mass=mol\times MW=1\times 18=18~g$

c. mol NO at 1273 K and 1 atm :

$\tt n=\dfrac{PV}{RT}=\dfrac{1\times 35.5}{0.08206\times 1273}=0.34$

mol ratio of NO : O2 = 4 : 5, so mol O2 :

$\tt \dfrac{5}{4}\times 0.34=0.425$

Volume O2 at STP :

$\tt 0.425\times 22.4=9.52~L$

5 0

3 years ago

Bandingkan kesan penyusuan susu ibu dengan penggunaan susu formula terhadap perkembangan bayi.

DedPeter [7]

Answer:

kau kje nk senang je kan . gi cari jawapan dlm buku la

Explanation:

aku x nk jwb . benda bole cri kt buku . ni la anak zmn skg ni . semua nk mudah

5 0

3 years ago

What does M stand for

liq [111]

Answer:Molarity

Explanation:M stand for molarity

6 0

3 years ago

What is the mass if 1.72 moles of sodium nitrate

alexgriva [62]

Answer:

146 g

Explanation:

Step 1. Calculate the molar mass of NaNO₃

Na = 22.99

N = 14.01

3O = 3 × 16.00 = 48.00

Total = 85.00 g/mol

Step 2. Calculate the mass of NaNO₃

Mass of NaNO₃ = 1.72 × 85.00/1

Mass of NaNO₃ = 146 g

8 0

3 years ago

Read 2 more answers

Which is made by weathering? A. sediments B. minerals C. ash D. magma

rusak2 [61]

The answer is A cause the water breaks down the rocks into small pieces which are called sediments. These things later on turn into rocks with pressure and heat

4 0

3 years ago