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Vedmedyk [2.9K]
3 years ago
7

What is the molarity of 2.34 mil of calcium in 1860 mL of solution?

Chemistry
2 answers:
jenyasd209 [6]3 years ago
7 0

Answer: 1.23 M Ca

Explanation:

Molarity is moles of solute/volume (only liters) of solution

Convert mL to L

To do that divide by 1000

Therefore, 2.34 mol/1.86 L

Answer is 1.23 M Ca

shtirl [24]3 years ago
4 0

Answer:

1.258 M

Explanation:

Molarity = \frac{Moles of solute}\\{Volume of the solution in L}

Given.

Moles of Calcium = 2.34 mol

Volume of the solution = 1860 ml

1 L = 1000 ml

1860 ml x \frac{1L}{1000 ml} = 1.86 L

Molarity = \frac{2.34 mol}{1.86 L} = 1.258 M

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77julia77 [94]

Answer:

See explanation

Explanation:

According to Bronsted-Lowry, an acid is a proton donor while a base is a proton acceptor.

Hence, if we consider the reaction above, we will notice that for each base there is a conjugate acid and for each acid there is a conjugate base.

For the acid HNO3, its conjugate base is NO3^- while for the acid H3O^+, its conjugate base is H2O.

4 0
2 years ago
A pycnometer is a precisely weighted vessel that is used for highly accurate density determinations. Suppose that a pycnometer h
dexar [7]

Answer:

5.758  is the density of the metal ingot in grams per cubic centimeter.

Explanation:

1) Mass of pycnometer = M = 27.60 g

Mass of pycnometer with water ,m= 45.65 g

Density of water at 20 °C = d =998.2 kg/m^3

1 kg = 1000 g

1 m^3=10^6 cm^3

998.2 kg/m^3=\frac{998.2 \times 1000 g}{10^6 cm^3}=0.9982 g/cm^3

Mass of water ,m'= m - M = 45.65 g -  27.60 g =18.05 g

Volume of pycnometer = Volume of water present in it = V

Density=\frac{Mass}{Volume}

V=\frac{m'}{d}=\frac{18.05 g}{0.9982 g/cm^3}=18.08 cm^3

2) Mass of metal , water and pycnometer = 56.83 g

Mass of metal,M' =  9.5 g

Mass of water when metal and water are together ,m''= 56.83 g - M'- M

56.83 g - 9.5 g - 27.60 g = 19.7 g

Volume of water when metal and water are together = v

v=\frac{m''}{d}=\frac{19.7 g}{0.9982 g/cm^3}=19.73 cm^3

Density of metal = d'

Volume of metal = v' =\frac{M'}{d'}

Difference in volume will give volume of metal ingot.

v' = v - V

v'=19.73 cm^3-18.08 cm^3=

v'=1.65 cm^3

Since volume cannot be in negative .

Density of the metal =d'

=d'=\frac{M'}{v'}=\frac{9.5 g}{1.65 cm^3}=5.758 g/cm^3

5 0
3 years ago
PLZ HELP
Softa [21]

Answer:

Single-gene disorders, where a mutation affects one gene. Sickle cell anemia is an example.

Chromosomal disorders, where chromosomes (or parts of chromosomes) are missing or changed.

Complex disorders, where there are mutations in two or more genius.

Hope it help^^

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4 0
2 years ago
The American Council for an Energy Efficient Economy works to _______.
Komok [63]
<span>The American Council for an Energy-Efficient Economy works to (c) </span>invest in clean energy technologies that will strengthen the economy.

Their aim is to promote energy efficiency which will ultimately benefit the economy and the environment. 
8 0
3 years ago
Read 2 more answers
How can there be more than 1000 different atoms when there are only about 100 different elements?
LekaFEV [45]
Actually, there are only about 100 atoms that have been yet discovered. But each element has many different kinds of atom. For instance, carbon. Do you know carbon has more than 30 or 50 different types of atoms? Well, how? There are isotopes. Don't think that there is only one carbon atom which has 6 electrons and 6 protons and 6 neutrons. There are more. C-13 has 6 electrons and 6 protons and 7 neutrons. While, C-14 has 6 electrons and 6 protons and 8 neutrons. I just showed you three stable isotopes of carbon(element). But, what is really an isotope?? Did you notice that all of these atoms had the same number of protons and electron but different numbers of neutrons? This is really an isotope. Well, if an atom takes a few more electrons or gives off a few electrons, it still stays the same element/ atom type. Just like that an element can have atoms of different neutron number. It may be less or more. It doesn't affect the atom much: just makes an isotope. But it does affect the atomic mass number or radioactivity of an atom. So, an element can have many different forms of isotopes of its atoms. In this way, being only 100 atoms, there can 1000 atoms or (more than that!). 

To make it more clear-

Definition of ISOTOPE: <span>any of two or more forms of a </span>chemical<span> element, having the same number of protons and electrons in the nucleus, or the same atomic number, but having different numbers of neutrons</span>

HOPE YOU UNDERSTOOD THE MATTER:-))


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3 years ago
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