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blsea [12.9K]
2 years ago
7

R

Chemistry
1 answer:
guajiro [1.7K]2 years ago
4 0

Answer:

C.) 35

Explanation:

The mass is made up of the total protons and neutrons in an atom. Protons and neutrons both have a mass of 1 amu. Electrons are not included in this measurement because they have an insignificant mass (practically 0).

(17 protons x 1 amu) + (18 neutrons x 1 amu) = 35 amu

Therefore, if an atom contains 17 protons and 18 neutrons, the mass should be 35 amu.

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Monkeys eat insects and plants. What ecological role best describes monkeys
WINSTONCH [101]

Answer:

scavenger or consumer

Explanation:

they collect and gather fruits, and different wild life

4 0
3 years ago
A chemist has 3.55x1022 molecules of nitrogen monoxide. How
Alina [70]

Answer:

<h2>0.059 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.55 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.05897...

We have the final answer as

<h3>0.059 moles</h3>

Hope this helps you

6 0
3 years ago
Atom A and Atom B have the same number of protons and neutrons, but they do not have the same number of electrons.
kaheart [24]
Answer C is the answer
3 0
3 years ago
Read 2 more answers
When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium
Shalnov [3]
B Silver Chloride 
when you mix AgNO3- and NaCl- they make AgCl which is insoluble and settle to the bottom of the test tube, and NaNO3 which remains as a liquid solution 
5 0
3 years ago
Read 2 more answers
Which sentences describe alpha particles?
kakasveta [241]

Answer:

1. Alpha particles consist of two protons and two neutrons.

Explanation:

Alpha particles are generally produced in the process of alpha decay, a radio active decay in which an atom loses an helium atom.

AN alpha particle is identical  to the helium particle. The helium particle has mass number of 4 and atomic number of 2. This means;

Number of protons = 2

Number of neutrons = Mass Number - Atomic Number = 2

The correct option is option 1.

8 0
4 years ago
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