Answer:
The answer is
<h2>0.63 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
![density = \frac{mass}{volume} \\](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20%5C%5C)
From the question
mass = 47 g
volume = 75 mL
The density is
![density = \frac{47}{75} \\ = 0.626666666...](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7B47%7D%7B75%7D%20%20%5C%5C%20%20%3D%200.626666666...)
We have the final answer as
<h3>0.63 g/mL</h3>
Hope this helps you
Till now we are able to find
a) How does the moon affect tides on earth? : the answer is moon gravitational field
b) How long does it take for the earth to rotate on its axis? : we know the answer is 24 hours (a day)
c) Why do volcanoes erupt? : due to divergence / convergence of tectonic plates
However we still cannot predict "When will the next earthquake happen?" based on science
Answer:
200 grams is the mass of 15% of the solution of lime that is formed by dissolving 30g of calcium hydroxide in water.
Explanation:
Mass of solution = M
Mass percentage of the solution of lime = 15%
Mass of lime or calcium hydroxide = m = 30 g
The Formula of mass percentage is given as :
![m/m\%=\frac{m}{M}\times 100](https://tex.z-dn.net/?f=m%2Fm%5C%25%3D%5Cfrac%7Bm%7D%7BM%7D%5Ctimes%20100)
On substituting the values in ab above formula :
![15\%=\frac{30 g}{M}\times 100](https://tex.z-dn.net/?f=15%5C%25%3D%5Cfrac%7B30%20g%7D%7BM%7D%5Ctimes%20100)
![M=\frac{30 g}{15}\times 100=200 g](https://tex.z-dn.net/?f=M%3D%5Cfrac%7B30%20g%7D%7B15%7D%5Ctimes%20100%3D200%20g)
200 grams is the mass of 15% of the solution of lime that is formed by dissolving 30g of calcium hydroxide in water.
<u>Answer:</u> The correct answer is 0.745 km
<u>Explanation:</u>
We are given:
A numerical value of 815 yards
To convert this into kilometers, we use the conversion factor:
1 km = 1093.6 yards
Converting the given value into kilometers, we get:
![\Rightarrow 815yd\times \frac{1km}{1093.6yd}=0.745km](https://tex.z-dn.net/?f=%5CRightarrow%20815yd%5Ctimes%20%5Cfrac%7B1km%7D%7B1093.6yd%7D%3D0.745km)
Hence, the correct answer is 0.745 km
<span> It is the amount of matter in the object. hope this helps
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