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Mashutka [201]
3 years ago
13

_ is the radioisotope commonly used to map human's circulatory system

Chemistry
2 answers:
castortr0y [4]3 years ago
4 0
I agree with the person above - Iron-59 is indeed the radiosotope commonly used to map human's circulatory system. 
Ymorist [56]3 years ago
4 0
Iron-59 i<span>s the radioisotope commonly used to map human's circulatory system</span>
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Explain what is meant by energy and list two units in which energy is measured
dybincka [34]

Answer:

J (joule)  W(watt)

Explanation:

If you're looking for the definition it is

The most common definition of energy is the work that a certain force can do. Energy also cannot be created or destroyed and some examples are

light, heat, mechanical, potential, and kinetic

4 0
3 years ago
What's the electron configuration of an N⁻³ ion
tatuchka [14]
The electronic configuration of n - 3 ion is [He] 2s2 2p3.
5 0
1 year ago
Jia observes that adding a solution of sodium hydroxide to a clear liquid turns the liquid pink. She makes a hypothesis about wh
Oksana_A [137]

The question is incomplete, the complete question is;

Jia observes that adding a solution of sodium hydroxide to a clear liquid turns the liquid pink. She makes a hypothesis about why the liquid changed color.

Which characteristic is least important for her hypothesis to have?

A)ability to be tested

B)based on the opinion of her classmates

C)ability to be proven incorrect

D)based on her current knowledge

Answer:

B)based on the opinion of her classmates

Explanation:

A hypothesis is a supposition or tentative explanation put forward based on minimal evidence. It sometimes sets the pace for further investigation.

Hypothesis is always based on empirical observation and not on popular opinion, hence the opinion of Jia's classmates is least important in Jia's formulation of a hypothesis.

3 0
3 years ago
How does the law of conservation of mass apply to this reaction: Mg + HCl → H2 + MgCl2?
erastova [34]

Answer: The correct answer is A. Hydrogen and chlorine need to be balanced. There's an equal amount of magnesium on each side.

6 0
2 years ago
Read 2 more answers
How many atoms of nitrogen are present in 2.49 moles of nitrogen trifluoride ? atoms of nitrogen?
stepladder [879]
<span>Nitrogen trifluoride - NF3.
1 mol NF3 contains 1 mol atoms of Nitrogen
2.49 mol NF3 contains 2.49 mol atoms of Nitrogen

1 mol   ----  6.02 *10²³ atoms
2.49 mol ----- 2.49*6.02*10²³ = 15.0*10²³ atoms of N</span>
6 0
2 years ago
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