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3 years ago

Question

Chemistry

1 answer:

denpristay [2]3 years ago

5 0

Answer:

6 hydrogen.

The number of atoms in the reactants must be the same number of atoms in the products.

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Which of these elements has the highest electronegativity

Anna71 [15]

The answer is going to nitrogen, that element has the highest electronegativity

3 0

3 years ago

Alpha helices are a type of secondary structure in proteins. What is the length of a 33.0 kDa single‑stranded α‑helical protein

WARRIOR [948]

Answer:

450 Å

Explanation:

The amino acids in an α-helix are arranged in a right-handed helical structure where each amino acid residue corresponds to a 100° turn in the helix, and a translation of 1.5 Å (0.15 nm) along the helical axis

Mass of protein= 33.0 kDa

33.0 kDa ×(1000Da/kDa) × ( 1 residue/ 110 Da)

=33.0 ×1000 × 0.0091

= 300 residues

300 residues × (1.5Å /residue)

=450 Å

7 0

3 years ago

Given the following information: benzoic acid = C6H5COOH hydrocyanic acid = HCN C6H5COOH is a stronger acid than HCN (1) Write t

Maurinko [17]

Answer:

The net ionic equation is

C6H5COOH+ CN-= C6H5COO- + HCN

Explanation:

From the ionic equation

C6H5COOH + Na+ + CN- = C6H5COO- + Na+ + HCN

Only sodium is the spectator ion, so it cancels out, since C6H5COOH and HCN do not ionize completely they are left undissociated

5 0

4 years ago

Consider the connotation of the underlined word in each sentence, and then match each sentence to the best

Ivan

Answer: This image is the answer to this question.

Explanation:

7 0

4 years ago

A 9.000L tank at 27.0°C is filled with 5.29g of sulfur tetrafluoride gas and 15.6g of carbon dioxide gas. You can assume both ga

Colt1911 [192]

Answer:

Mole fraction SF₄: 0,121

Mole fraction CO₂: 0,879

Partial pressure SF₄: 0,134 atm

Partial pressure CO₂: 0,968 atm

Total pressure: 1,102 atm

Explanation:

The moles of sulfur tetrafluoride gas and carbon dioxide gas are:

5,29g SF₄× $\frac{1mol}{108,07g}$ = 0,0489 moles SF₄

15,6 CO₂× $\frac{1mol}{44,01g}$ = 0,354 moles CO₂

Mole fraction SF₄:

$X_{SF_{4}} = \frac{0,0489mol}{0,0489+0,354}$ = 0,121

Mole fraction CO₂:

$X_{CO_{2}} = \frac{0,354mol}{0,0489+0,354}$ = 0,879

It is possible to obtain partial pressure of both gases with moles of each gas using:

P = nRT/V

Where n are respective moles, R is gas constant (0,082atmL/molK), T is teemperature (27°C=300,15K), V is volume (9,0000L)

Replacing:

Partial pressure SF₄: 0,134atm

Partial pressure CO₂: 0,968atm

Now, the sum of the partial pressures is the total pressure in the tank, that means:

Total pressure: 0,134atm + 0,968atm = 1,102atm

I hope it helps!

6 0

3 years ago