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insens350 [35]
2 years ago
5

The endocrine system sends hormones through the blood to control the activities of tissues and organs.

Chemistry
2 answers:
ivann1987 [24]2 years ago
7 0
Your answer is true.
zzz [600]2 years ago
7 0
True.   hope that helps you
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The periodic table _____.
zhuklara [117]

Explanation:

eto po yung pic thank me later☺️

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2 years ago
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water is conductor or insluator? nails are conductor or insulator? key chains are conductor or insulator?
e-lub [12.9K]

Answer:

Explanation:

Water is a conductor if it has solutes/ions dissolved in it(tapwater for example)

but pure water is not a good conductor of electricity.

Nails and keychains(made of metal) are conductors of electricity.

3 0
3 years ago
What mass of C6H8O7 should be used every 7.0 X 10^2mg NaHCO3
Savatey [412]

Mass C₆H₈O₇ : 0.531484 g

<h3>Further explanation</h3>

Reaction

3NaHCO₃ (aq) + C₆H₈O₇ (aq) → 3 CO₂ (g) + 3 H₂O (l) + Na₃C₆H₅O₇ (aq)

MW NaHCO₃ : 84 g/mol

mass NaHCO₃ : 7.10² mg=0.7 g

mol NaHCO₃ :

\tt mol=\dfrac{0.7}{84}=0.0083

mol C₆H₈O₇ :

\tt \dfrac{1}{3}\times 0.0083=0.00277

MW C₆H₈O₇ : 192 g/mol

mass C₆H₈O₇ :

\tt mass=0.00277\times 192=0.53184

4 0
2 years ago
What is heat of vaporization?
Anestetic [448]

Explanation:

It is the heat required to change a gram of substance from a liquid to a gas.

3 0
2 years ago
Describe how the molecular structures of alkenes and alkynes differ from the structure of alkanes
evablogger [386]

Alkanes are saturated hydrocarbon that contains only single bonds, whereas Alkenes and Alkynes are unsaturated hydrocarbons which contain one or more double bond and triple bonds.

<u>Explanation:</u>

  • A saturated hydrocarbon with an only single bond is called alkanes. Ethane consisting of two carbon atoms that are bonded with a single bond and six hydrogen atoms sharing the other valence electron of carbon atoms. The molecular structure of alkane is CnH2n+2.
  • An unsaturated hydrocarbon with a two bond is called alkenes. Ethene consisting of two carbon atoms double-bonded to each other. The molecular structure of alkene is CnH2n.
  • An unsaturated hydrocarbon with a triple bond is called as alkynes. It involves sharing three pairs of electrons. The molecular structure of alkyne is CnH2n-2.
4 0
2 years ago
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