Mercury is a liquid meteal but it is not hard? how can we say it is a metal
Answers
Related Questions
What is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?
What does it mean in terms of strength when the ph of an acid changes from 5 to 4?
The scientific notation 2 x 10-2 has what value? 0.020.0020.20.0002
The value of Ka in water at 25 °C for propionic acid (C2H5CO2H) is 3.4 x 10-5 M. What is the pH of a 0.020 M aqueous solution of propionic acid?
Answers
B. observed wavelength of light
C. speed of light
D. mass of the particulate matter
Answers
Answer: B. observed wavelength of light
Explanation: The relation of Planck's constant relating the Joules of energy absorbed/released by matter is usually used to determine the energy of the photon. The mathematical expression is -
E= h c /
Thus as we can observe that the energy is directly proportional to the speed of light and inversely proportional to the wavelength of the light.
Thus , we can say that Planck's constant relates the Joules of energy absorbed/released by matter to the observed wavelength of light.
Answers
A car traveling at 20 m/s starts to decelerate steadily it comes to a complete stop in 10s. The equation for the acceleration is velocity divided by time. So divide 20 m/s by 10 s and you will get an acceleration of 2 m/s2.
a pure substance that has a fixed volume and shape.
B.
a pure substance that does not have a fixed volume or shape.
C.
an unevenly distributed mixture of two or more components.
D.
an evenly distributed mixture of two or more components.
Answers
This is because a solution requires a solvent and solute, which rules out answers A and B, as it means it cannot be pure.
d is the answer solution is a mixture of two or more components
Answers
The basic form of matter is the atom. Atoms can be distinguished from each other and they are known as elements. When elements combined, they form compounds. The can either contain two or more elements. When you combined compounds of different types or classes, they form mixtures.
PLZ HELP AND SHOW YOUR WORK AND PLZ EXPLAIN TO ME SO I CAN DO OTHER QUESTIONS RELATED TO THIS
Answers
Alright, so the start point is the 2.6cm³. Next you use the density to find the amount in grams. The density can be written out as an identity which in this case would be 0.97gNa=1cm³Na. So you have this equation
2.6mL Na × ≈ 2.5g Na
Remember that 1cm³=1mL and that all answers must follow the rules of significant figures and rounding.
Final answer:
The mass of the sodium sample, calculated using the formula Mass = Density x Volume, is approximately 2.52 grams.
Explanation:
To find the mass of the sodium sample, you can use the formula Density = Mass / Volume. In this case, we know that the density of sodium is 0.97g/cm3 and the volume of the sample is 2.6 cm3. You can rearrange the equation to solve for mass which gives us Mass = Density x Volume.
So if you multiply the density of sodium with the volume of the sample, i.e., 0.97g/cm3 x 2.6 cm3, it results in a mass of approximately 2.52 grams.
So, the mass of the sodium sample is approximately 2.52 grams.
Learn more about Density here:
#SPJ2