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Sever21 [200]
4 years ago
15

while looking at neon on the periodic table a student needs to find an element with a smaller atomic mass in the same group wher

e should the student
Chemistry
2 answers:
Oxana [17]4 years ago
7 0
In the noble gasses section. Above neon is helium, which means it has less atomic mass, and is in the same section
12345 [234]4 years ago
7 0
The element with a smaller atomic mass in the same group would be helium (He)
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what is the independent and the dependent variable of this topic: witch liquid has the fastest evaporation rate
motikmotik
The independent variable would be the type of liquid the dependen is the evaporation rates
8 0
3 years ago
In a chemical reaction at constant temperature, the addition of a catalyst: _______________
Tom [10]

Answer:

affects the equilibrium content

4 0
3 years ago
Read 2 more answers
If you burn 29.4 g of hydrogen and produce 263 g of water, how much oxygen reacted?
vovikov84 [41]

The reaction between hydrogen and oxygen to form water is given as:

H_2 + O_2 \rightarrow H_2O

The balanced reaction is:

2H_2 + O_2 \rightarrow 2H_2O

According to the balanced reaction,

4 g of hydrogen (4\times 1) reacts with 32 g of oxygen (2\times 16).

So, oxygen reacted with 29.4 g of hydrogen is:

\frac{29.4\times 32}{4} = 235.2 g

Hence, the mass of oxygen that is reacted with 29.4 g of hydrogen is 235.2 g.

7 0
3 years ago
Give the name of the element that is a member of the alkali metal family whose most stable ion contains 2 electrons.
notka56 [123]
Lithium

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Li 1s²2s¹ → Li⁺ 1s² + e⁻
3 0
4 years ago
The green light emitted by a stoplight has a wavelength of 505 nm. What is the frequency of this photon? (c = 3.00 × 10⁸ m/s).
Kitty [74]

Answer:

5.9405*10^14 Hz

Explanation:

Remember the equation c=v*λ

v=frequency

λ=wavelength

By manipulating the equation, we can get it in terms of frequency:

c/λ=v

Now convert wavelength to meters (1nm=m*10^-9)

5.05*10^-7m (2 decimal places were shifted to make the number between 1-10, hence the -7 exponent)

Use the manipulated equation:

(3.00*10^8)/(5.05*10^-7), which yields:

5.9405*10^14 Hz (or s^-1)

6 0
3 years ago
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