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777dan777 [17]
3 years ago
15

The identity of an element is defined by its number of _______________. For example, every atom of Carbon has ___ protons and on

ly atoms with 6 protons are __________. However, atoms of the same element can have ________________ number of neutrons. When atoms of the same element have different numbers of neutrons they are called ________________ . Since the mass of an atom is determined by the total number of protons and neutrons, isotopes of the same element will have different __________ despite having the _________ numbers of protons. Also, isotopes of the same element will have similar _____________ behavior. This is because chemical _____________ is based on the number of ____, and isotopes only have different numbers of ____.
Chemistry
1 answer:
DiKsa [7]3 years ago
7 0
In this order.
protons. 6. carbon atom. different. isotopes. atomic masses. same. chemical reaction. reactions. electrons. neutrons.
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8. Write a balanced chemical equation showing how you could prepare each of the following salts from an
polet [3.4K]

Answer:

according to my reading

use own words

Explanation:

Salts are combinations of acids and bases. The cation comes from a base and the anion from an acid. Therefore, to make KNO3 we react KOH and HNO3. See how that is done? We write K and add OH to make KOH. We take NO3 and add H to make HNO3.

6 0
3 years ago
Predict the products of the following reaction: <br> RbNO2 +BaCO3-&gt;
sukhopar [10]

Answer:

2RbNO2 + BaCO3 → Rb2CO3 + Ba(NO2)2

Explanation:

The balanced reaction equation is shown below;

2RbNO2 + BaCO3 → Rb2CO3 + Ba(NO2)2

This reaction is possible because the reduction potential of Rb is -2.98V while that of Ba is –2.92 V. Hence Rb can displace Ba from its salt solution.

The equation is balanced since the number of atoms of each element on the left and right hand sides of the reaction equation are equal.

6 0
3 years ago
At room temperature, the solubility of which solute in water would be most affected by a change in pressure?
Bad White [126]
<h3><u>Answer;</u></h3>

At room temperature, the solubility of which solute in water would be most affected by a change in pressure?

<h3><u>Explanation;</u></h3>
  • As the pressure on a gas confined above a liquid increases, the solubility of the gas increases in the liquid.
  • Carbon dioxide gas is most soluble in water under conditions of high pressure and low temperature.
  • The solubility of gases decreases with increasing temperature, so the air space inside the cylinder when cold water is used will be less compared to warm water.
4 0
4 years ago
Read 2 more answers
One liter of a buffer contains 2.00 Molar NaA and 2.00 Molar HA. (A- is the anion of an acid) 15.00 g NaOH is added. (Assume no
madam [21]

Answer:

The new pH is 10.8031

Explanation:

Given information:

[NaA] = concentration = 2 M

[HA] = concentration = 2 M

V = volume = 1 L

15 g of NaOH added

Question: What is the new pH, pH = ?

Moles of NaA:

n_{NaA} =2\frac{moles}{L} *1L=2moles

Moles of HA:

n_{HA} =2\frac{moles}{L} *1L=2moles

Moles of NaOH:

n_{NaOH} =15g*\frac{1mol}{40g} =0.375moles

The reaction:

HA + NaOH → NaA + H₂O

Moles of NaA = 2 + 0.375 = 2.375 moles

Moles of HA = 2 - 0.375 = 1.625 moles

The value of Ka is 2.3x10⁻¹¹

The pKa:

pKa=-logKa=-log(2.3x10^{-11} )=10.6383

Applying the Henderson's Hasselbach equation

pH=pKa+log\frac{molesNaA}{molesHA} =10.6383+log\frac{2.375}{1.625} =10.8031

3 0
3 years ago
Darwin told us that science:<br> saves lives
11111nata11111 [884]

Answer:yup!!

Explanation:

8 0
3 years ago
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