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2 years ago

What is the ability to do work or cause change is called ?

Chemistry

2 answers:

Vikentia [17]2 years ago

5 0

Answer:

1. Energy

2i. Potential energy

2ii. Kinetic energy

Explanation:

Energy is simply the ability to do work.

Mechanical energy exist in two forms

1. Potential energy: this is the energy possed by a body at rest. It is otherwise known as stored energy.

2. Kinetic energy: this is the energy possed by a body in motion. A body changing position possess kinetic energy.

Citrus2011 [14]2 years ago

3 0

Answer: 1. Energy 2. Potential Energy and Kinetic Energy

Explanation: Energy is the capacity of a physical system to do work. Energy for stationary objects is called as Potential energy and energy in motion is known as Kinetic energy.

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ow does the food chain start? A Plant life uses energy from the sun to make food. B Insects like grasshoppers eat plant life. C

Natali [406]

A is the answer! I’m pretty sure hopefully i helped!!

5 0

1 year ago

The ka values for several weak acids are given below. which acid (and its conjugate base) would be the best buffer at ph = 8.0?

Pie

One of the best buffer choice for pH = 8.0 is Tris with Ka value of 6.3 x 10^-9.

To support this answer, we first calculate for the pKa value as the negative logarithm of the Ka value:
pKa = -log Ka

For Tris, which is an abbreviation for 2-Amino-2-hydroxymethyl-propane-1,3 -diol and has a Ka value of 6.3 x 10^-9, the pKa is
pKa = -log Ka
= -log (6.3x10^-9)
= 8.2

We know that buffers work best when pH is equal to pKa:
pKa = 8.2 = pH

Therefore Tris would be a best buffer at pH = 8.0.

7 0

2 years ago

Read 2 more answers

Whose work directly resulted in the development of an atomic model that has negative electrons stuck within a sea of positive ma

miskamm [114]

Answer: Thomson

Explanation: It verified J. J. Thomson's work on the atomic structure.

3 0

2 years ago

Read 2 more answers

10. Copper(i) bromide reacts with magnesium metal: 2 CuBr + Mg → 2 Cu + MgBrz

velikii [3]

Answer:

72.6 grams

Explanation:

I got this answer through stoichiometry. For every 1 mole of Mg, 2 moles of CuBr are consumed. Because of this, multiply the moles of Mg by 2. Then, convert moles to grams.

5 0

2 years ago

Read 2 more answers

Which ionic equation describes a redox reaction? A. Ag(+) + Cl- = AgCl B. 2H(+) + CO3(2-) = CO2 + H2O C. H(+) + OH(-) = H2O D. Z

Gennadij [26K]

Answer: The correct option is D. $Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction take place simultaneously. It is known as the reaction in which the exchange of electrons takes place.

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when the oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when the oxidation number of a species decreases.

From the given ionic reactions:

$Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

On the reactant side:

Oxidation number of Zn = 0

Oxidation number of Cu = +2

On the product side:

Oxidation number of Cu = 0

Oxidation number of Zn = +2

As the oxidation number of Zn is increasing from 0 to +2. Thus, it is getting oxidized. Similarly, the oxidation number of Cu is decreasing from +2 to 0. Thus, it is getting reduced. Therefore, forming a redox couple

Hence, the correct option is D. $Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu$

6 0

2 years ago