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4 years ago

Is a 10 carat gold ring considered a pure substance?

2 answers:

8 0

A 10 Karat gold is considered a homogeneous mixture, which would have copper and silver and is considered a mixture not a pure.

Fynjy0 [20]4 years ago

6 0

It is a pure substance

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6. Using the rules of significant figures, calculate the following:

Burka [1]

Answer:

A. 3

B . 2

C. 2

D. 2

E. 4 significant figures

3 0

3 years ago

What is the condition of water in the hydrosphere right now?

SCORPION-xisa [38]

Answer:

A planet's hydrosphere can be liquid, vapor, or ice. On Earth, in the places at the north and south pole, water exists in ice or glacier form, in the atmosphere it exists in vapor form and liquid water exists on the surface in the form of oceans, lakes and rivers. It also exists below ground as groundwater, in wells and aquifers. Water collects in clouds, then falls to Earth in the form of rain or snow,

Hope it helps

:D

6 0

4 years ago

A mixture of gases at a total pressure of 95 kPa contains N₂, CO₂, and O₂. The partial pressure of the CO₂ is 24 kPa and the par

Zinaida [17]

Answer:

23 kPa = Partial pressure O₂

Explanation:

In a mixture of gases, the sum of partial pressure of each gas that contains the mixture = Total pressure

Total pressure = Partial pressure N₂ + Partial pressure CO₂ + Partial pressure O₂

95 kPa = 48 kPa + 24 kPa + Partial pressure O₂

95 kPa - 48 kPa - 24 kPa = Partial pressure O₂

23 kPa = Partial pressure O₂

7 0

3 years ago

Balance equation for. _Mg + _H3(PO4) --_Mg3(PO4)2+ _H2

Katena32 [7]

3Mg + 2H3(PO4) —> Mg3(PO4)2 + 3H2

I think

3 0

3 years ago

How many Sr2+ ions are present in 0.314 moles of Sr3(PO4)2?

zubka84 [21]

Answer:

5.67x10²³ ions

Explanation:

By looking at the molecular formula, we can tell that there are three Sr²⁺ ions per Sr₃(PO₄)₂ molecule.

We convert Sr₃(PO₄)₂ moles into Sr₃(PO₄)₂ molecules by using Avogadro's number:

0.314 moles * 6.023x10²³ = 1.89x10²³ molecules

Finally we multiply that number by 3 in order to convert Sr₃(PO₄)₂ molecules to Sr²⁺ ions:

1.89x10²³ * 3 = 5.67x10²³ ions.

8 0

3 years ago