Answer:
A
Explanation:
Electrons are significantly smaller than neutrons and protons.
Electrons have a diameter of less than 10^-16 centimeters, whereas protons and neutrons have a radius of about 10^-13 centimeters.
Answer:
.13 moles
Explanation:
To begin this problem:
First you need to find the molar mass of acetamide, to do so:
- C=12g, H=1.008g, O=16g, and N=14g
- 2(12)+5(1.008)+1(16)+1(14)=59.04
To find moles when given grams, we divide grams by the molar mass.
- 7.8g/59.04g/mol=.13 moles
Using 2 sig figs from what we are given, this is our final answer.
Answer:
A
Explanation:
water molecules are combined to make food
NiF2 is the correct answer for the is problem
Answer
6.9 x 10¹²Hz
Explanation:
Given parameters:
Wavelength of the wave = 4.35 x 10⁻⁵m
Unknown:
Frequency of the wave = ?
Solution:
The speed of a wave is related to the wavelength and frequency using the expression below;
C = Fλ
C is the speed of light = 3 x 10⁸m/s
F is the frequency
λ is the wavelength
Insert the given parameters and solve;
3 x 10⁸ = F x 4.35 x 10⁻⁵
F = 
= 6.9 x 10¹²Hz
