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kirill [66]
3 years ago
12

The mass of a rock is 2.491g. its volume is 1.71 ml. what is the density

Chemistry
1 answer:
Sergio [31]3 years ago
3 0
The equation for density is mass/volume. Make sure your units match what is given in the problem.
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A ____usually requires calculations that are too complicated to do by<br>hand. ​
liraira [26]

Answer:

computer model

Explanation:

Computer models are cheaper to set up than alternative methods that could be used to predict what will happen in a system, ex. building a prototype. Other benefits include being able to: make alterations and quickly see the outcomes.

8 0
3 years ago
An ultraviolet ray of light has a wavelength of 1.5x10^-8 m. What is the ray's<br> frequency?
frutty [35]

Answer:

2 E16 Hz    or     2 * 10^16 Hz

Explanation:

The formula to determine frequency is f = c / λ.

f = frequency

c = speed of light

λ = wavelength

f = 3E8 / 1.5E-8

f = 2E16

This makes sense because UV light exists roughly

between 8E14 Hz and 3E16 Hz ----- 2E16 Hz falls in that range

8 0
3 years ago
Select the true statement. ANSWER Unselected Anions are smaller than their neutral parent atoms because there are fewer electron
Olenka [21]

Answer:

Explanation:

.

3 0
3 years ago
PLZ HELP I WILL GIVE BRAINLY AND POINTS
max2010maxim [7]

Answer:

1. Define the problem

2. Conduct a literature search

3. Propose a hypothesis

4. Devise an experiment to prove or disprove

5. State conclusions

Explanation: In order to begin an experiment, you must first define a problem or question that you will be answering. Then you must research the problem in order to form a hypothesis, or an educated guess. Then you should devise and execute an experiment to answer your question. The conclusions that you draw will either prove or disprove your hypothesis. Hope this helps!

8 0
3 years ago
Read 2 more answers
Choose the correct mole ratio for the balanced equation below.<br><br> Ca + 2H2O → Ca(OH)2 + H2
Cerrena [4.2K]

Answer: For every one mole of Ca used in this reaction, two mols of H20 are used, one mole of Ca(OH)2 is formed, and one mole of H2 is formed.

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5 0
2 years ago
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