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EastWind [94]
3 years ago
14

What is a force is needed to stop a child form slipping on ice

Chemistry
1 answer:
Ludmilka [50]3 years ago
6 0

Answer:

Friction. Hope I helped.

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Which reaction would most likely occur at the cathode of an electrochemical cell?
JulijaS [17]

Answer:

D

Explanation:

D

5 0
3 years ago
Balance the equ. representing the reaction between iron
denis-greek [22]

Answer:

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

Explanation:

There are many ways to balance a chemical equation. In this case, I will show you the algebraic method:

The first step is assign a letter to each compound:

a Fe₂O₃ + b CO → c Fe + d CO₂

Then, you must write the balance equations for each atom, thus:

<em>Fe: 2a = c</em>

<em>C: b = d</em>

<em>O: 3a + b = 2d</em>

The last step is assign a value to a letter. I, for example, will say that <em>a is 1, </em>and then find the values for the others letters, thus:

<em>Fe: 2a = c </em>if <em>a=1; c=2</em>

<em>O: 3a + b = 2d </em>if <em>a=1 → 3+b = 2d</em>

As b = d → <em>3+d = 2d; 3 = 2d - d; </em>3=d and 3=b

Thus, the balanced equation is:

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

I hope it helps!

7 0
3 years ago
Which model of the Adam was modeled after the solar system
Fofino [41]

. After Rutherford's model was published, a Danish scientist named Niels Bohr became interesting in the orbits of the electrons. He was inspired by thinking of atoms as tiny Solar Systems, where the elect

5 0
3 years ago
Are elements, compounds, or both made up of small invisible particles?
son4ous [18]

I think both of them are but I really don't know


6 0
3 years ago
The glancing angle (θ) of a Bragg reflection (n = 1) from a set of crystal planes separated by 99.3 pm is 10.42°. Calculate the
Rufina [12.5K]

Answer:

wavelength λ =  35.92 pm

Explanation:

Given that:

The glancing angle (θ) = 10.42°

Bragg reflection n = 1

wavelength λ = ???

diameter d = 99.3 pm

Using the formula:

nλ = 2dsinθ

we have:

1 × λ = 2 × ( 99.3) × sin (10.42°)

λ =  198.6 × 0.18086

λ =  35.92 pm

8 0
3 years ago
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