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MissTica
3 years ago
8

when a piece of potassium metal is placed in water a violent reaction occurs. when copper metal is placed in water nothing happe

ns. Is this a physical or chemical property of the metal?
Chemistry
1 answer:
Kitty [74]3 years ago
5 0

Answer:

Chemical Reaction

Explanation:

Copper is a transitional metal, meaning it is much more stable chemically than potassium. Potassium is considered an Alkaline Earth metal meaning it is very unstable and reacts violently. I'm not sure how in depth you have to go but this is just the surface of the explanation.

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How many total atoms make up the chemical formula Ca3( PO4)2<br> 12<br> 13<br> 11<br> 10
Eva8 [605]

Answer:

The total atoms present in the chemical formula is 13

Explanation:

3 0
3 years ago
How many atoms of oxygen are present in 7.51 grams of<br> glycine with formula C₂H5O2N?
Blizzard [7]

1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N. Details about number of atoms can be found below.

How to calculate number of atoms?

The number of atoms of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number.

However, the number of moles of oxygen in glycine can be calculated using the following expression:

Molar mass of C₂H5O2N = 75.07g/mol

Mass of oxygen in glycine = 32g/mol

Hence; 32/75.07 × 7.51 = 3.2grams of oxygen in glycine

Moles of oxygen = 3.2g ÷ 16g/mol = 0.2moles

Number of atoms of oxygen = 0.2 × 6.02 × 10²³ = 1.205 × 10²³ atoms

Therefore, 1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N.

Learn more about number of atoms at: brainly.com/question/8834373

#SPJ1

3 0
2 years ago
Determine the number of neutrons in an atom U-233.
alexdok [17]
We Know, Atomic number of Uranium = 92
Molar mass in given species = 233

Now, Molar mass = Number of Protons + Number of Neutrons
233 = 92 + x
x = 233 - 92
x = 141

So, your final answer is 141

Hope this helps!
5 0
3 years ago
Read 2 more answers
How does density of air related to elevation (altitude)
dem82 [27]

Answer:

The density of air goes down as you get higher with altitude.

Explanation:

Less air is pushing down on the molecules below it as you go up. This means that it is not as compacted, another word for which is dense.

8 0
3 years ago
Methane (CH4) reacts with Cl2 to yield CCl4 and HCl by the following reaction equation: CH4 + 4 Cl2 → CCl4 + 4HCl. What is the Δ
Vlad1618 [11]

Answer: The ΔH of the reaction if 51.3 g of CH_4 reacts with excess Cl_2 to yield 1387.6 kJ is 432.27kJ

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of CH_4

\text{Number of moles of methane}=\frac{51.3g}{16g/mol}=3.21moles

CH_4+4Cl_2\rightarrow CCl_4+4HCl   \Delta H=?

As Cl_2 is present in excess, CH_4 is the limiting reagent as it limits the formation of product.

If 3.21 moles of methane releases heat = 1387.6 kJ

Thus 1 mole of methane release=\frac{1387.6}{3.21}\times 1=432.27kJ

4 0
3 years ago
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