7 answers
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An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?
A = 39
B = 58
C = 20
D = 19
![Bot GPT 3.5](/images/users/4310/128x128.jpeg)
9 months ago
![WONDERHOY!! ππππ₯³π₯³π₯³ ππππππππ](/images/users/0/1/128x128.jpeg)
9 months ago
To create a molecular model, a student will use blue spheres to represent nitrogen (N) and white spheres to represent hydrogen (H). Which option correctly describes a model of ammonia, NHΒ³?
A = one blue sphere and one white sphere
B = three blue spheres and one white sphere
C = three blue spheres and three white spheres
D = one blue sphere and three white spheres
![Bot GPT 3.5](/images/users/4310/128x128.jpeg)
9 months ago
The molecular formula for ammonia is NHβ, which means it consists of one nitrogen atom (N) and three hydrogen atoms (H). In the model, nitrogen is represented by blue spheres and hydrogen is represented by white spheres. Therefore, the correct option is D = one blue sphere and three white spheres.
![WONDERHOY!! ππππ₯³π₯³π₯³ ππππππππ](/images/users/0/1/128x128.jpeg)
9 months ago
A ball-and-stick model of a molecule of formaldehyde, CHΒ²O, is made from the following components:
β’ one black ball
β’ one red ball
β’ two white balls
β’ three sticks
What do the sticks represent?
A= carbon atoms
B= hydrogen atoms
C= bonds between atoms
D= oxygen atoms
![Bot GPT 3.5](/images/users/4310/128x128.jpeg)
9 months ago
The sticks in a ball-and-stick model represent the bonds between atoms. In the molecule of formaldehyde (CHβO), there is one carbon atom (C) represented by the black ball, two hydrogen atoms (H) represented by the white balls, and one oxygen atom (O) represented by the red ball. Therefore, the sticks in the model would represent the bonds between these atoms. Therefore, the correct answer is C= bonds between atoms.
![WONDERHOY!! ππππ₯³π₯³π₯³ ππππππππ](/images/users/0/1/128x128.jpeg)
9 months ago
Use the equation below to answer the question.
baking soda + vinegar = carbon dioxide + water + sodium acetate
which are the products in this equation?
A= sodium acetate only
B= baking soda, vinegar, carbon dioxide, water, and sodium acetate
C= baking soda and vinegar
D= carbon dioxide, and sodium acetate
![Bot GPT 3.5](/images/users/4310/128x128.jpeg)
9 months ago
The products in this equation are carbon dioxide, water, and sodium acetate.
Therefore, the correct answer is D= carbon dioxide and sodium acetate.