What properties can you observe about the Sun?

2 answers:

8 0

The sun is made up of mainly gases and a VERY hot core, it is considered a yellow dwarf, solar flares/sunspots can affect the earth, it is currently expanding as stars do when they get older

nexus9112 [7]2 years ago

5 0

Energy- The ability to do work or cause a change.
Gravity- A force that pulls objects toward each other.
Light- A kind of energy that you can see.
Sun- The star that is near Earth.
Temperature- A measure of how hot and cold something is.
Transform- To change.

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A block of wood has a volume of 64 cm3 and a mass of 46 grams. What is the density of the block?

Rom4ik [11]

The correct answer is 0.72 g/cm3

Explanation:

The density of a material depends on both its mass (amount of matter), which is usually provided in grams (g), and its volume (space occupied), which is provided in units such as cubic centimeters cm3. Moreover, to find how dense the material is, take the mass and divide it into the volume. The process for finding the density of the block of wood is shown below:

$d = \frac{m}{v}$

$d = \frac{46 g}{64 cm3}$

$d = 0.718 g/cm3$

This means the density is 0.71g/cm3 and this can be rounded to 0.72 g/cm3

3 0

2 years ago

A compound is 53.31% c, 11.18% h, and 35.51% o by mass. what is its empirical formula?

Alexus [3.1K]

<span>Your final answer would be C4H10O2, which equals 90amu</span>

3 0

3 years ago

Calculate the molarity when 135 g of KCl is dissolved to make a 2.50 L solution. Round to two significant digits.

inysia [295]

Explanation:

$\textrm{Molarity of a solution}=\frac{\textrm{Number of moles of solvent}}{\textrm{Volume of solution in Liters}}$

We are given a $2.50L$ solution which contains $135g$ of $KCl$ .

To calculate number of moles of $KCl$ present, we need to find it's molar mass from charts. Molar Mass of $KCl$ is known to be $74.55\frac{g}{Mol}$ .

Number of moles of $KCl$ present = $\frac{\textrm{Given weight}}{\textrm{Molar Mass}}\textrm{ = }\frac{135g}{74.55\frac{g}{Mol}}\textrm{ = }1.81087mol$