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AnnZ [28]
3 years ago
8

_are structures that allow for one-way blood flow through the heart HELP!!!!

Chemistry
2 answers:
seraphim [82]3 years ago
6 0

Answer:

Ventricles

Explanation:

blsea [12.9K]3 years ago
6 0

Answer:

Its valves

Explanation:

i got an 100 on the test.

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Analysis of the water content of a lake found in the desert showed that it contained 16.6 percent chloride ion, and had a densit
IRISSAK [1]

Answer : The molarity of the chloride ion in the water is, 5.75 M

Explanation :

As we are given that 16.6 % chloride ion that means 16.6 grams of chloride ion present 100 grams of solution.

First we have to calculate the volume of solution.

\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}

\text{Volume of solution}=\frac{100g}{1.23g/mL}=81.3mL

Now we have to calculate the molarity of chloride ion.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Mass of chloride ion}\times 1000}{\text{Molar mass of chloride ion}\times \text{Volume of solution (in mL)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{16.6g\times 1000}{35.5g/mole\times 81.3mL}=5.75mole/L=5.75M

Thus, the molarity of the chloride ion in the water is, 5.75 M

8 0
3 years ago
What are the 6 branches of chemistry and what do they study?
neonofarm [45]
Hi there!

The 6 branches of chemistry are Organic Chemistry, Inorganic Chemistry, Analytical Chemistry, Physical Chemistry, Biochemistry, and <span>Nuclear Chemistry.

</span>Organic Chemistry: The branch of chemistry dedicated to carbon compounds and substances.

Inorganic Chemistry: <span> The branch of chemistry dedicated to non-carbon compounds and substances.
</span>
Analytical Chemistry: The branch of chemistry dedicated to identifying and quantifying matter through a variety of different instruments, tools, and practices.

Physical Chemistry: The branch of chemistry dedicated to analysis of chemical phenomena as well as their different behavior and phenomena. 

Biochemistry: <span> The branch of chemistry dedicated to the chemical processes such as cellular respiration that occur within living organisms.</span>

Nuclear chemistry: <span> The branch of chemistry dedicated to nuclear processes and properties as well radioactivity.</span>
4 0
4 years ago
Read 2 more answers
Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to
NARA [144]

Answer:

Any binary molecular compound of hydrogen and a Group 6A element above Selenium will be less acidic, so water and dihydrogen sulfide are less acidic in aqueous solution than hydrogen selenide.

Explanation:

Going down in a group increases the atomic radius and a greater atomic radius implyes greater ionic radius.  

When ionization takes place in these compounds they yelds protons (hidrogen ion) and an lewis base (anion). The greater the ionic radius the greater its stability, thus the periodic tendency is increaing the acidity of binary hidrogen compounds when going down a group. On the other hand going up a group decreases acidity, so any molecular compound of hydrogen and a Group 6A element above Selenium will be less acidic, so water and dihydrogen sulfide are less acidic in aqueous solution than hydrogen selenide.

3 0
4 years ago
Balance equation of calcium hydroxide+carbon dioxide= calcium carbonate+water for grade 8 in step wise
larisa [96]

Answer:

Ca(OH)2 +CO2========CaCO3 +H2O

Explanation:

since the number of elements in the right is equal to that of the elements in the left side shows it is balanced

8 0
3 years ago
If a cold piece of metal is added to hot water, the water will
Roman55 [17]

Answer:

Over time the metal will cool and the water will heat up. Eventually the two objects will have the same temperature

Explanation:

5 0
4 years ago
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