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Sliva [168]
3 years ago
10

Count the atoms 2Ca(H2PO4)3 How many O atoms are in the above equation?

Chemistry
1 answer:
Helga [31]3 years ago
7 0
I think they are 3 atoms
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A 78.0 sample of gold at 175°C is put in a foam cup calorimeter with 25.0 g of water at 25.0°C. Calculate the specific heat of t
Nady [450]

The answer is the specific heat of the gold is 0.129 J/gC .

<h3>What is Calorimetry ?</h3>

It is an experimental method that allows one to calculate the heat change in a chemical process.

Calorimeter is just a reaction vessel. It could be a foam cup, a soda can, or a commercially available bomb calorimeter

Where q represents the heat change in the reaction, the calorimeter and the water. Since you are only measuring temperature, you will need to calculate the heat using it.

The change in heat of the gold is given by:

\rm q_{gold} = m c_{gold}\Delta T

=78 \times c_{p}\times (175-38.18)

The change in heat of the water is given by:

\rm q_{water} = mc_{p}\Delta T

m is the mass of water in the calorimeter in grams,

and delta T is the change in temperature.

where \rm c_{p} is the specific heat of water, which is 4.184 J/gC

mass of water =  25 g of water.

Temperature T₁ = 25°C

Final Temperature = 38.18 °C

Difference between temperature = 13.18 °C

\rm q_{water} = 25 \times 4.18\times 13.18

For a Foam Cup Calorimeter

\rm q_{water} = q_{cal}\\\\\\\rm 25\times4.18\times13.318 = 78 \times c_{p}\times (175-38.18)\\\\\\On \;solving\; this \;we \;get  \;c_{p} =  0.129

Therefore the  the specific heat of the gold is 0.129 J/gC

To know more about Calorimeter

brainly.com/question/4802333

#SPJ1

4 0
2 years ago
How many moles of chlorine are in 100 g chlorine (cl)?
SSSSS [86.1K]
I hope this is clear?

3 0
4 years ago
Can a combination reaction be a redox reaction ?
saul85 [17]

Answer:

Yes A redox reaction can be a combination reaction.

Two elements are mixed in a combination reaction to produce a single product.

Explanation:

Example: water formula

2H2 + O2 → 2H2O

Oxygen is reduced in this reaction when electrons are transferred from hydrogen to oxygen and hydrogen is also oxidized since oxygen from hydrogen accepts electrons. Oxygen is the oxidizing agent and hydrogen is the reducing agent.

2H2 + O2 → 2H2O

4 0
3 years ago
Predict the products from theses reaction, and balance the equations. Include phase symbols.
timofeeve [1]

Answer:

2 K(s) + Cl₂(g) ⟶ 2 KCl(s)

2 Cu(s) + O₂(g) ⟶ 2 CuO(s)

Explanation:

Both reactions are synthesis reactions (two substances combine to form another).

Reaction: K(s) + Cl₂(g) ⟶

The product is the binary salt KCl. The balanced chemical equation is:

2 K(s) + Cl₂(g) ⟶ 2 KCl(s)

Reaction: Cu(s) + O₂(g) ⟶

The most likely product is the metal oxide CuO. The balanced chemical equation is:

2 Cu(s) + O₂(g) ⟶ 2 CuO(s)

5 0
3 years ago
James mixed Barium and oxide. what does he get? how does it work?
kherson [118]

Answer: Barium Oxide

We know that:

James mixed Ba + O²

Now, let's see what will happen when he does mix it.

The Barium will give it's electrons up to the oxide.

The Oxide and Barium will both reach noble gas status.

In the end, James will get Barium Oxide.

Best of Luck!

5 0
3 years ago
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