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
Stolb23 [73]
3 years ago
6

What is the percent composition by mass of nitrogen in the compound N2H4 (gram-formula mass = 32 g/mol)?

Chemistry
2 answers:
Karolina [17]3 years ago
8 0

Answer:88%

Explanation:

Alex3 years ago
3 0

Answer:

\large \boxed{93\, \% }

Explanation:

1. Calculate the molar mass of N₂H₄

2N = 2 × 14 = 28

4H = 2 ×  1  = <u>  4</u>

           Tot. = 32

2. Calculate the mass percent of N

\text{\% of element} = \dfrac{\text{mass of element}}{\text{mass of compound}} \times 100 \, \% = \dfrac{\text{28}}{\text{32}} \times 100 \, \% =\mathbf{88 \, \%}\\\\\text{The percentage of N in N$_{2}$H$_{4}$ is $\large \boxed{\mathbf{88\, \% }}$}}

You might be interested in
Instructions
ivann1987 [24]

Answer:

I got a 100 with this, sorry if this is not what you want just trying to help

Explanation:

1. This experiment was to find how mass and speed effect KE. This is important because if you were in a situation where you needed something to go higher, you would know to add more or less of mass/speed.  

To test mass, we filled the bean bag with a certain amount of water, then dropped it. After, you recorded how high it made the bean bag go. The same with speed, but same amount in the bottle, just dropped from different heights.  

My hypothesis is when you have more mass, the KE will be greater. This is also the same with speed, if it is dropped from a higher place, the bean bag will launch farther than the last time.  

2. Data I collected from the lab was like my hypothesis explained. When the height of the bottle increased, it made the bean bag go higher than the last. And I tested 4 different masses, 0.125 kg, 0.250kg, 0.375kg and 0.500kg. Each time the bean bag went higher on a larger mass.  

A lot of times on the speed test, the bean bag would go higher than the bottle drop point, but not every time. Also, when it was dropped from the same height each time, some results varied quite a bit, like when it was dropped from 1.28 the results were 1.14 then 1.30 1.30. Mass on the other hand was all in the same number range, only once the numbers were a bit off from each other.  

3.  Some formulas I used were KE= ½ mv^2 and Ht v^2/2g. The first was to calculate the kinetic energy of an object, m=mass v=speed. Second was for finding out what height I needed to drop something to reach a certain speed, Ht=Height and g= Gravitational Acceleration of 9.8 m/s^2.  

I used these to figure out tables that showed relationships between different things like mass and KE or speed and height. The whole time I was doing the lab, my data was going up, when there was more mass/speed there were higher values in the table.  

This means that my hypothesis at the beginning was correct, more of m/s means KE will increase proportionally because they are all linear. I found it surprising when the bean bag height went over the water bottle drop mark.  

4.     To conclude, my hypothesis matched my data. The data values went up when more mass or speed was added. This means if I were in a situation where I needed more kinetic energy for something, I would know to increase mass or the speed of the object giving it energy.  

The reason that this hypothesis is correct is when you have more mass, you have more energy. So, when you drop let's say a baseball, it isn’t that heavy so it would only launch the bean bag so far. But a bowling ball is very heavy and has lots of energy when falling because of that, it would make the bean bag go very high.  

To make this experiment better, I would use a smoother material for the lever so energy wouldn’t be lost by friction from wood rubbing together. Also, maybe a scanner or video camera to more accurately record how far the bean bag went. All of these would help the lab get more precise results, maybe they could be used in a future lab.

8 0
3 years ago
Why is there day and night
Burka [1]
Because the moon orbits the earth and when the moon gets in front of the sun it blocks the sunlight and then it becomes night
6 0
3 years ago
What are the different areas of an electron cloud called?
max2010maxim [7]
I believe they are called Energy Levels or Energy Orbitals.
5 0
3 years ago
What is a property of a substance?
S_A_V [24]

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.

Explanation:

Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

8 0
2 years ago
Whats the answer to number 5?
Hunter-Best [27]
C is the answer because he wants to know if less force is needed to pull on a slippery surface which reduces friction
5 0
3 years ago
Read 2 more answers
Other questions:
  • How many ammonium ions, nh4 , are there in 5.0 mol (nh4)2s?
    12·2 answers
  • what is the raw materials of the following foam, perfume, tyre, paper, soap, glass, paint, white cement, cloth, and pop ceiling
    14·1 answer
  • An experiment is designed to determine the launch angle that will give a projectile the greatest range (make it go the longest d
    10·1 answer
  • 2. List three types of chemical changes.<br><br><br><br> Help me
    7·1 answer
  • Calculate the magnitude and direction (i.e., the angle with respect to the positive H-axis, measured positive as counter-clockwi
    14·1 answer
  • As we learned, matter exists in different states--solid, liquid and gas. Which one of these could be described as having low den
    10·1 answer
  • What happens to energy when sally kicks a soccor ball
    5·1 answer
  • 20 points
    11·1 answer
  • Flat vs. Fizzy Soda (If you have the answers for the rest of the questions 9-17 please let me know) thankyou!
    6·1 answer
  • Cerebrospinal fluid of the central nervous system and synovial fluid of joint capsules are both examples of _______.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!