1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ycow [4]
3 years ago
15

Plz Help I have One more time To retake and I can't fail it..​

Chemistry
1 answer:
frosja888 [35]3 years ago
7 0

option(a)

Explanation:

You answer is correct as you move from left to right across a period. But, the question is asked regarding to the right to left across a period. So, as you move from right to left across a period, you can find firstly Non-metals, secondly Metalloids, and lastly Metals.

You might be interested in
Which of the following is not a part of every scientific investigation?
Dmitry_Shevchenko [17]

Answer:

the correct answer is Group of answer choices

6 0
3 years ago
The mass of a deuterium nucleus 21H is less than its components masses. Calculate the mass defect.________ amu
Inessa [10]

Answer:

The mass defect of a deuterium nucleus is 0.001848 amu.

Explanation:

The deuterium is:

^{A}_{Z}X \rightarrow ^{2}_{1}H  

The mass defect can be calculated by using the following equation:

\Delta m = [Zm_{p} + (A - Z)m_{n}] - m_{a}

Where:

Z: is the number of protons = 1

A: is the mass number = 2      

m_{p}: is the proton's mass = 1.00728 amu  

m_{n}: is the neutron's mass = 1.00867 amu

m_{a}: is the mass of deuterium = 2.01410178 amu

Then, the mass defect is:

\Delta m = [1.00728 amu + (2- 1)1.00867 amu] - 2.01410178 amu = 0.001848 amu

Therefore, the mass defect of a deuterium nucleus is 0.001848 amu.

I hope it helps you!  

5 0
3 years ago
Read 2 more answers
Predict, using Boyle’s Law, what will happen to a balloon that an ocean diver takes to a pressure of 202 kPa (normal atmospheric
kaheart [24]

Explanation:

Balloon that an ocean diver takes to a pressure of 202 k Pa will get reduced in size that is the volume of the balloon will get reduced. This is because pressure and volume of the gas are inversely related to each other.

According to Boyle's law: The pressure of the gas  is inversely proportional to the volume occupied by the gas at constant temperature(in Kelvins).

pressure\propto \frac{1}{volume} (At constant temperature)

The pressure beneath the sea is 202 kPa and the atmospheric pressure  is 101.3 kPa . This increase in pressure will result in decrease in volume occupied by the gas inside the balloon with decrease in size of a balloon. Hence, the size of the balloon will get reduced at 202 kPa (under sea).

7 0
3 years ago
A 15.0 L tank of gas is contained at a high pressure of 8.20 x 10^4 torr. The tank is opened and the gas expands into an empty c
Inga [223]

Answer:

20.5torr

Explanation:

Given parameters:

V₁  = 15L

P₁  = 8.2 x 10⁴torr

V₂ = 6 x 10⁴L

Unknown:

P₂  = ?

Solution:

To solve this problem we have to apply the claims of Boyle's law.

Boyle's law is given mathematically as;

            P₁ V₁   = P₂V₂

where P₁ is the initial pressure

          V₁ is the initial volume

           P₂ is final pressure

           V₂ is final volume

   8.2 x 10⁴  x 15  = P₂  x 6 x 10⁴

         P₂  = 20.5torr

5 0
3 years ago
When a person is scared, the brain responds to the fear by directing the hormone adrenaline to be released. This is an example o
tangare [24]

Answer:

Adrenaline

Explanation:

3 0
3 years ago
Other questions:
  • Which formula can be used to express the law of conservation of momentum, where p = momentum? pi = pf pi > pf pi < pf pi ≠
    10·2 answers
  • The Earth only has a limited supply of fresh water; eventually, we will have to use ocean water. We will purify ocean water thro
    7·1 answer
  • The standard on which the atomic mass unit is based is the mass of a
    10·1 answer
  • The mutchkin and the noggin a mutchkin is a scottish unit of liquid measure equal to 0.42 l. How many mutchkins are required to
    5·2 answers
  • What element has 14 protons
    14·2 answers
  • For millions of years, large amounts of glacial ice formed on earth, covering huge areas of land. it then melted, or receded. wh
    11·1 answer
  • Will mark BRAINLIEST question and choices in photos
    8·1 answer
  • Equation for the reaction btn nitric acid and metal X whose valence is 3​
    15·1 answer
  • Which of the following diagrams represents a single<br> replacement reaction?
    11·1 answer
  • 1. How much energy must be absorbed to break the bonds of the 2 molecules of HCl?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!