Is this a correct electron config?

During a chemical reaction, energya)is converted form one from to anotherb)increasesc)decreasesd)is used up as bonds and broken

alekssr [168]

A) energy is converted from one form to another

7 0

3 years ago

Which statement accurately describes the evidence that scientists gather using fossils? Check all that apply.

OLga [1]

Complete question is;

Which statements accurately describe the evidence that scientists gather using fossils? Check all that apply.

A) The fossil record can be used to date rocks.

B) Living things with many cells have always lived on Earth.

C) Simple organisms are found only in young rocks.

D) Geologists study ancient remains of plants and animals.

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates.

Answer:

A) The fossil record can be used to date rocks

E) Scientists can figure out what ancient living things ate.

F) Pollen and seeds help provide clues about ancient climates

Explanation:

In scientific research, fossils are sometimes referred to as animals and plant. Now, in studying records of fossils, it will be easy to know the length of existence of living things on the Earth. Also, we can be able to identify the manner in which different relationships exists between plants and animals by predicting their lifestyles, location of their habitation e.t.c which can be used to predict the old time climates.

Looking at the options given in relation to the explanation given, options A, E & F are correct

5 0

3 years ago

On the basis of the information below, the dissolution of FeF2(s) in acidic solution is A. thermodynamically favorable, because

antoniya [11.8K]

Since K3 is greater than 1, the reaction is thermodynamically favorable.

Data;

FeF2 is in an acidic solution
K2 > 1 is thermodynamically favorable
k3 > 1 is not thermodynamically favorable
K1<1 is not thermodynamically favorable

This states that the heat change in a given chemical reaction is the same irrespective of the number of process in which the reaction is effected.

Using Hess Law;

$rxn_3 = rxn_1 * 2rxn_2\\k_3 = k_1 * k_2^2\\k_3 = 2*10^-^6 * (1*10^3)^2\\k_3 = 2$

substituting this using Gibbs law,

$\delta G^0_3 = -RT\ln K_3\\\delta G^0_3 < 0$

Since K3 is greater than 1, the reaction is thermodynamically favorable.

Learn more on Hess law here;

brainly.com/question/12895682

8 0

2 years ago

Lithium-4 and Lithium-5 can be defined as:

Ludmilka [50]

Answer:

A: isotopes

Explanation:

Hello.

In this case, since isotopes are defined as atoms of the same element with the same atomic number (number of protons and electrons) but different mass number (atomic mass) we can represent them via the symbol of the element followed by a dash indicating the atomic mass of the occurring isotope, for instance, for carbon, we may find C-12, C-13 and even C-14 which is useful in dating techniques.

Therefore, Lithium-4 or Li-4 and Lithium-5 or Li-5 can be defined as isotopes.

Best regards.

8 0

3 years ago

Thomson found that the cathode rays were actually streams of with the following properties: ________

kiruha [24]

The cathode rays are also known as electrons. They are a stream of negatively charged particles.

<h3>What are cathode rays?</h3>

The term cathode rays were used by JJ Thompson to describe a stream of rays that emanate from the cathode in a cathode ray tube. These rays correspond to what we know today as electrons.

The cathode rays;

Travelled in straight lines
Depended on the nature of gas in the tube
Were deflected by electric and magnetic fields
Produced mechanical motion in objects on their path.

Learn more about cathode rays: brainly.com/question/1825212

3 0

2 years ago

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