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Ymorist [56]
2 years ago
9

A student has a block of wood. She places it on a wooden desk. She uses a spring scale to measure how much force is needed to sl

ide the block of wood across the desk. The student then places the block of wood on a piece of sandpaper and repeats the process. The type of force
the student is investigating is _______.

A. gravitational
B. magnetic
C. electricity
D. friction
Chemistry
2 answers:
yarga [219]2 years ago
6 0
D:friction



Reason:because they are trying different types of things to rub against it and see if it will slow it down



Please give me the bran list answer !
Firdavs [7]2 years ago
4 0
D: i know this is correct not much behind that tho
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La fórmula correcta del óxido salino de estaño es: *
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2 years ago
If the conjugate base of a molecule has a pkb of 1.4, what would you expect the molecule to be?
maw [93]

If the conjugate base of a molecule has a pKb of 1.4, the molecule should be a Weak Acid.

Notice this question gives us the pKb of the molecule, not the pKa. Because of this, the pH scale basically gets reversed, so lower numbers in pKb correlate with stronger bases, and higher numbers in pKb correlate with stronger acids - the exact opposite of the pH scale.

It's important to make sure you completely understand the terms of conjugate base, conjugate acid, pKb, pKa, and how they all relate. It's easy to mix up the meanings of these definitions.

Here are the two other pieces of information you need to know to correctly answer this question:

  • Strong acids have a weak conjugate base.
  • Strong bases have a weak conjugate acid.

So if the problem says you have a strong conjugate base, then the molecule must be a weak acid. To illustrate this, think of ammonium, NH4+. Ammonium is a weak acid, but the conjugate base of ammonium is ammonia, NH3, which is a reasonably good base.

Learn more about conjugate base here : brainly.com/question/22514615

#SPJ4

3 0
2 years ago
Define energy and power and describe the relationship that exists between them.
bagirrra123 [75]
Energy is ability to work or function. Power is the amount of energy transferred to an object.
When energy is transferred to an object or has energy it moves and power is the energy put in a object, meaning they work together to move the object
4 0
2 years ago
HELP!! ASAP!! WILL MARK BRAINLIEST!!!
Lunna [17]
The answer is A :) hope this help
5 0
3 years ago
Read 2 more answers
During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a ∆G of -20 kcal/mol. If you double the amoun
Dennis_Churaev [7]

Answer:

dG will be the same -20 kcal/mol

Explanation:

The dG can be expressed in terms of the G(products) - G(reactants). If the amount of enzyme is doubled the Gibbs energy of the reactants and products will be the same, so the substraction dG has the same value

7 0
3 years ago
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