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user100 [1]
3 years ago
15

Please help thankyou

Chemistry
1 answer:
dangina [55]3 years ago
6 0

Hope this serves helpful to u!!

Hope this helps by the way as well

Good luck!!!

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Gold has a density of 19.3g/cm3. If you have a gold bar with a volume of
marin [14]

Answer:

The answer is

<h2>877 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density = 19.3 g/cm³

volume = 44.9 cm³

The mass of the gold bar

mass = 19.3 × 44.9 = 866.57

We have the final answer as

<h3>877 g</h3>

Hope this helps you

8 0
3 years ago
Why should a hypothesis be testable?
Ierofanga [76]
A. It must be testable in order to be found true or false.
4 0
3 years ago
Please Solve this! I need help
Delicious77 [7]

Answer:

To plot a graph, you put the independent variable on the y-axis and the dependent on the x-axis. This might sound really hard, but it's not.

A dependent variable is something that is changed by other factors. For example, in this question, the temperature is dependent on the time. You can't change time by temperature, it's impossible. But you CAN change temperature by the more time that goes by. This makes Time independent and Temperature Independent.

You write the graph so that Time (1-10) goes up the side (the y-axis), starting from the bottom left (this point is called the origin). Then you write the Temperature on the bottom, from left to right. The numbers you are given have to have the same amount of points (the little squares you see) in between them, and you have to be able to fit all of the numbers on the graph.

The last step is to plot the points on the graph so they match up. If the time is 1, then you go to where the time says one and move over to the right to where it is the correct temperature. That is where you put your point. You keep doing this until you have all the points plotted and you can connect the dots.

Explanation:

8 0
3 years ago
A 1.4639-g sample of limestone is analyzed for Fe, Ca, and Mg. The iron is determined as Fe2O3 yielding 0.0357 g. Calcium is iso
alisha [4.7K]

Answer:

A) w/w % of Fe - 2.44%

B) w/w % of Mg - 4.590%

C) w/w % of Ca - 96%

Explanation:

A) w/w % of Fe in limestone as Fe2O3 = (Mass of Fe2O3 /Mass of limestone) x 100

 0.0357/1.4639 X 100

= 2.438 =2.44

B) w/w % of Mg in limestone as Mg2P2O7 = (Mass of Mg2P2O7 /Mass of limestone) x 100

= 0.0672/1.4639 X 100

= 4.590

C) w/w % of Ca in limestone as CaSO4 = (Mass of CaSO4/Mass of limestone) x 100

= 1.4058/1.4639 X 100

= 96

                                                           

3 0
3 years ago
Which of these is a mixture?
Masja [62]
Air
because it has more than one molecule 
7 0
3 years ago
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