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SashulF [63]
3 years ago
8

Calcium is an important nutrient found in milk. The source of calcium comes from the compound calcium phosphate. Which of the fo

llowing is the correct chemical formula for calcium phosphate?
Group of answer choices

F. Ca3P2

G. CaPO4

H. Ca2(PO4)3

J. Ca3(PO4)2
Chemistry
1 answer:
Tom [10]3 years ago
7 0

Answer:

Ca3(PO4)2

trust me this is correct

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Calculate the concentration, in units of dm-3, of sulfuric acid, H2SO4, which has a solubility of 2 mol dm-3. [Relative atomic m
olga55 [171]

Answer:

196 gdm-3

Explanation:

There are two major units of concentration, moldm-3 and gdm-3. The first unit refers to molar concentration while the second unit refers to mass concentration. Both units are useful in chemistry when describing the concentration of solutions as deemed expedient in each particular case.

Here we are required to compute the mass concentration from the molar concentration. We must recall that; mass concentration= molar concentration × molar mass

Let us first obtain the molar mass of H2SO4 from the relative atomic masses given=

2(1) + 32 + 4(16) = 98 gmol-1

Molar concentration of H2SO4 = 2 moldm-3

Mass concentration= 2 moldm-3 × 98 gmol-1

Mass concentration = 196 gdm-3

8 0
4 years ago
a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy if the pressure is increased to 970 torr
PilotLPTM [1.2K]
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant i.e PV = constant. Therefore, P1V1 = P2V2--(i) ( P1 = initial pressure, P2= final pressure, V1= initial volume, V2= final volume). P1=930 torr, P2= 970 torr, V1= 95 ml, V2=?. Put these values in equation (i), 930 torr x 95 ml = 970 torr x V2. Therefore, V2 = 91.08 ml.
5 0
4 years ago
Read 2 more answers
For the following question, select the correct chemical formula for the elements if they were to bong together.
9966 [12]

Answer:

Ionic

Explanation:

Lithium is an alkali metal and form an ionic bond by donating an electron.

Fluorine is a halogen and forms ionic bonds by accepting an electron.

The electronegativity difference between lithium (0.98) and fluorine (3.98) is 3 Pauling units. Usually, when elements have a difference of 1.7 (or 2.0) Pauling units the bond is classified as ionic.

Hope this helps! If you have any more questions or need more explanation please leave a comment down below and I will reply ASAP. Good luck!

5 0
3 years ago
Read 2 more answers
If 30cm³ of 0.45 mol dm3 HCl reacted with NaOH, how many moles of HCl reacted?​
77julia77 [94]

Moles HCl reacted : 0.0135

<h3>Further explanation</h3>

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\large {\boxed {\bold {M ~ = ~ \dfrac {n} {V}}}

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

n = V x M

The volume of HCl 30 cm³=3.10⁻² dm³

Molarity of HCl = 0.45 mol/dm³

so moles HCl reacted :

\tt n=3.10^{-2}\times 0.45=0.0135

3 0
3 years ago
In an investigation that uses the scientists method, which step immediately follows asking a question
Otrada [13]

The answer to your question is:

~Creating a hypothesis.

I hope this helps!!!

5 0
3 years ago
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