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4 years ago

What type of protein penetrates to the interior of the plasma membrane but does not extend all the way through it?

Chemistry

2 answers:

ELEN [110]4 years ago

7 0

The answer you are looking for is integral

just olya [345]4 years ago

7 0

integral i am just putting this because it needs twenty characters

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In terms of the atmosphere, which of the following best describes the oxygen that is present?

Viktor [21]

The atmosphere is considered homogeneous. It isn’t exactly on the smallest scales but that doesn’t matter. Homogenous means the composition will be the same in any sample taken from the substance. And clearly, the atmosphere is mostly gas. So the last answer is right

6 0

3 years ago

A textbook measures 250 mm long, 225 mm wide and 50 mm thick. What is the volume of this book in mm3? What is the volume of this

Dvinal [7]

Answer:

2.81 × 10⁶ mm³

2.81 × 10⁻³ m³

Explanation:

Step 1: Given data

Length (l): 250 mm

Width (w): 225 mm

Thickness (t): 50 mm

Step 2: Calculate the volume of the textbook

The book is a cuboid so we can find its volume (V) using the following expression.

V = l × w × t = 250 mm × 225 mm × 50 mm = 2.81 × 10⁶ mm³

Step 3: Convert the volume to cubic meters

We will use the relationship 1 m³ = 10⁹ mm³.

2.81 × 10⁶ mm³ × 1 m³ / 10⁹ mm³ = 2.81 × 10⁻³ m³

6 0

3 years ago

Fill in the blanks: Most metals have

victus00 [196]

Answer:

Most metals have <u>luster</u> which means they <u>reflect</u> light

Explanation:

When light, which is made up of energetic photons, comes in contact with the surface of a metal, it is absorbed due to the corresponding energy gaps present between the metal orbital. The absorbed photons results in the raising of the energy levels of electrons within an atom of the metal which later drop back to a lower energy level and re-emit the photons which can now be observed as the metallic luster.

4 0

3 years ago

Which of the following elements has the lowest electronegativity?

Readme [11.4K]

A. lithium
there ya go

3 0

3 years ago

Which of the following would tell you that a weak base is present?

Thepotemich [5.8K]

Answer:

A. An indicator added to the solution turns green-blue.

Explanation:

A pH scale measures the concentration of hydrogen ions in acidic and alkaline solutions.

In chemistry, pH literally means the power of hydrogen ions and it is a measure of the molar concentration of hydrogen ions in a particular solution; thus, specifying the acidity, neutrality or basicity of any chemical solution.

Mathematically, the pH of a solution is given by the formula;

$pH = -log_{10}(H^{+})$

On a pH scale, a solution with a pH of 7 is neutral, a solution with a pH below 7 is acidic and it's basic (alkaline) when it's pH is above 7.

A pH indicator can be defined as a compound (substance) that indicates the concentration of hydrogen ions present in a solution by changing its color over a narrow range of pH values.

A pH range of 1 to 3 (1 - 3) represents a strong acid with a red color.

When an indicator added to a solution turns green-blue, it simply means that a weak base is present.

5 0

3 years ago