All categories

3 years ago

Oxygen has an electronegativity of 3.4, phosporus has an electronegativity of 2.2 The bond between them is

Chemistry

1 answer:

Ipatiy [6.2K]3 years ago

7 0

Answer:

B. polar covalent

Explanation:

You might be interested in

When two immiscible liquids are mixed, what physical property determines which solvent layer will be on top?

Digiron [165]

Answer:

Density of the liquid.

Explanation:

Density is the mass per unit volume of a substance.

At specific volume of each immiscible substance, the substance with lower relative molecular mass has the lower density and such floats.

Thus, the physical properties that determines the solvent layer that will be on top is DENSITY.

3 0

4 years ago

Which scientific investigation describes a field study?

weqwewe [10]

Answer:

A. A scientist investigates a mouse's growth in nature by watching the animal.

A field study is a raw collection of data, typically in the natural habit of the organism; hence why an experiment taken in a lab isn't a field study.

7 0

3 years ago

How many atoms are present in a sample of Potassium (K) weighing 33.49g?

madam [21]

Answer:

5.158 × 10²³ atoms K

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

33.49 g K

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of K - 39.10 g/mol

Step 3: Convert

$33.49 \ g \ K(\frac{1 \ mol \ K}{39.10 \ g \ K} )(\frac{6.022 \cdot 10^{23} \ atoms \ K}{1 \ mol \ K} )$ = 5.15797 × 10²³ atoms K

Step 4: Check

We are given 4 sig figs. Follow sig figs and round.

5.15797 × 10²³ atoms K ≈ 5.158 × 10²³ atoms K

3 0

3 years ago

At what substrate concentration would an enzyme with a K_cat of 30.0 s⁻¹ and a Km of 0.0050 M operate at one-quarter of its maxi

Umnica [9.8K]

Answer:

The correct answer is option B.

Explanation:

Michaelis–Menten 's equation:

$v=V_{max}\times \frac{[S]}{(K_m+[S])}=k_{cat}[E_o]\times \frac{[S]}{(K_m+[S])}$

$V_{max}=k_{cat}[E_o]$

v = rate of formation of products

[S] = Concatenation of substrate = ?

$[K_m]$ = Michaelis constant

$V_{max}$ = Maximum rate achieved

$k_{cat}$ = Catalytic rate of the system

$E_o$ = initial concentration of enzyme

We have :

$v=\frac{V_{max}}{4}$

[S] =?

$K_m=0.0050 M$

$v=V_{max}\times \frac{[S]}{(K_m+[S])}$

$\frac{V_{max}}{4}=V_{max}\times \frac{[S]}{(0.0050 M+[S])}$

$[S]=\frac{0.005 M}{3}=1.7\times 10^{-3} M$

So, the correct answer is option B.

8 0

3 years ago

What if the volume of the cylinder?

Rzqust [24]

Answer:

653.45

Explanation:

pi * 4 by the power of 2 * 13 ~653.45

4 0

3 years ago