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2 years ago

A specialist that study substance obtained by attained mining is called a what

Chemistry

1 answer:

galina1969 [7]2 years ago

7 0

Answer:

Explanation:

Mining:

Mining is when certain substances are removed from the Earth, usually in large quantities. Mining can occur below the surface of the Earth via tunnels and caves. It can also occur at surface level through methods such as strip mining, which removes huge amounts of soil in the process

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HELP: Nitrogen has two isotopes, N-14 and N-15, with atomic masses of 14.00031 amu and 15.001 amu, respectively. What is the per

vitfil [10]

The atomic mass of an element is a weighted average of its isotopes in which the sum of the abundance of each isotope is equal to 1 or 100%.

Let fraction of N-15 be x
then fraction of N-14 = 1-x

Formula for Calculating Isotope:

$15.001x + 14.00031(1-x) = 14.0067$

on calculation:

x = 0.006403
so, % = 0.006403 x 100 = 0.6403 %

6 0

3 years ago

HELP PLEASEE

GarryVolchara [31]

Answer:

Let's start with the fact that cereals , are made of grains and are mostly carbohydrates. therefore they contain carbon oxygen and hydrogen. They also contain proteins so have nitrogen. Plants have the minerals that are in the soil where they grow, so the list you have is correct. They also generally have added vitamins ad minerals. The vitamins contain C, H, O N, and a few others such as sulfur, The added minerals might contain:copper, iron, zinc, cobalt, selenium, silicon and molybdenum .

Mark me as brainliest if it was helpful

4 0

3 years ago

2 upper N upper O subscript 2 (g) right arrow 2 upper N upper o (g) plus upper O subscript 2 (g). Second: 2 upper N upper O (g)

Ipatiy [6.2K]

The equation for the overall reaction obtained by adding these equations is; 2NO₂(g) ⇒ N₂O₄(g)

<h3>How to simplify chemical equations?</h3>

We are given equations;

2NO₂(g) ----> 2NO(g) + O₂(g) ---(1)

2NO(g) -----> N₂(g) + O₂(g) -----(2)

N₂(g) + 2O₂(g) ----> N₂O₄(g) -----(3)

Add eq 1 and eq 2 to get;

2NO₂(g) + 2NO(g) ⇒ 2NO(g) + O₂(g) + N₂(g) + O₂(g)

2NO will cancel out to get;

2NO₂(g) ⇒ N₂(g) + 2O₂(g) -----(4)

Add eq 3 to eq 4 to get;

N₂(g) + 2O₂(g) + 2NO₂(g) ⇒ N₂O₄(g) + N₂(g) + 2O₂(g)

This will reduce to;

2NO₂(g) ⇒ N₂O₄(g)

The correct question is;

Consider the chemical equations shown here.

2NO₂(g) ----> 2NO(g) + O₂(g)

2NO(g) -----> N₂(g) + O₂(g)

N₂(g) + 2O(g) ----> N₂O₄(g)

What is the equation for the overall reaction obtained by adding these equations?

Read more about chemical equations at; brainly.com/question/19837884

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2 years ago

What are geometric isomers?

irina [24]

C. compounds that have the same atoms arranged in the same order, but with different three-dimensional orientations.

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3 years ago

What main criterion determines major divisions in the geologic time scale?

koban [17]

The answer is B. the occurrence of huge events in Earth's natural history

The geologic time scale is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.

4 0

3 years ago

A specialist that study substance obtained by attained mining is called a what​

A specialist that study substance obtained by attained mining is called a what