Answer:
Explanation:
The expression to use to calculate the density of any substance is the following:
d = m/V (1)
Where:
m: mass (g)
V: Volume (mL or cm³)
Now, we don't have data for the volume of the substance, but the problem states that volume of the substance is three times more than the density, in other words, it means:
V = 3d (2)
With this, we can replace it in (1), and we can calculate the density still:
d = m / 3d (3)
Solving for d, we have the following:
m = 3d²
d² = m/3
d = √m/3 (4)
All we have to do now, is replace the value of the mass here and solve for density:
d = √10/3
d = √3.33
d = 1.82 g/cm³
This is the density of the substance
B. An electron has a neutral electrical charge.
C. An electron is much larger than an atom.
D. An electron is located inside the nucleus of an atom.
Answer: Option (A) is the correct answer.
Explanation:
An atom consists of three sub atomic particles. These particles are protons, electrons and neutrons.
Protons have a positive charge. Whereas neutrons have no charge. On the other hand, electrons have a negative charge.
Thus, we can conclude that out of the given options, an electron has a negative electrical charge is the correct statement.
The torque on the lever, with a 15 N force applied perpendicular at 2.0 m from the pivot point, is 30 N·m.
The torque on a lever is calculated by the formula T = rF sin θ, where T is torque, r is the distance from the pivot point to the point where the force is applied (lever arm), F is the force applied, and θ is the angle between the lever arm and the direction of the force. In this case, the force is applied at 90° to the lever arm, so the sin θ part of the formula is equal to 1. Therefore, the torque can be calculated by multiplying the force by the lever arm distance. With a force of 15 N applied perpendicular to the lever arm at a distance of 2.0 m from the pivot point, the torque on the lever would be 30 N·m (15 N x 2.0 m).
#SPJ3
c. sulfuric acid, a liquid
b. hydrogen, a gas
d. water, a liquid
The substance that the molecules have the strongest attractions to one another is the sugar, a solid. The answer is letter A. The solid has a more definite shape and volume. The particles are locked into place. It cannot be further compressed due to the bond that exists between the molecules. The kinetic energy of the molecules is close to none because the molecules are so close and so compact with each other.
Answer:
a
Explanation:
Answer:
Detail is given below.
Explanation:
Given data;
Abundance of Berkmarium-95 = 70%
Abundance of Berkmarium-97 = 28%
Abundance of Berkmarium-94 = 2%
Average atomic mass closer to which isotope = ?
Solution:
1st of all we will calculate the average atomic mass of Berkmarium.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (70×95)+(28×97)+(2×94) /100
Average atomic mass = 6650 + 2716+ 188 / 100
Average atomic mass= 9554 / 100
Average atomic mass = 95.54 amu
The average atomic mass is closer to the isotope Berkmarium-95 because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.
What is the equilibrium concentration of N2O4 if the equilibrium concentration of NO2 is 0.785 M?