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tia_tia [17]
3 years ago
7

What is the charge on the subatomic particles represented in Figure 4-3? Assuming all the

Chemistry
2 answers:
kompoz [17]3 years ago
8 0

Answer:

proton charge: positive

neutron charge: neutral (no charge)

Atomic number: 8

Mass number: 17

Explanation:

The charge of the subatomic particles represented in Figure 4-3 are:

proton: positive

neutron: neutral (no charge)

Atomic number: number of protons in the nucleus.

Atomic number: 8

Mass number: number of protons and neutrons in the nucleus.

Mass number: 9 neutrons + 8 protons = 17

FinnZ [79.3K]3 years ago
5 0

Answer:

Atomic number is 8 and mass number is 17.

Explanation:

From the figure,

The number of protons= 8

The number of neutrons = 9

Any atom contains equal number of protons and electrons.Hence, the atomic number of element is 8.

The atomic number eight element in the periodic table is "Oxygen.

And mass number is 17.

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a 20ml sample of hcl was titrated with the 0.0220 M Naoh. to reach the endpoint required 23.72 mL of the NaOh. Calculate the mol
Y_Kistochka [10]

Answer:

Molarity of HCl=0.026092M

Explanation:

The equation for the reaction is;

HCl + NaOH ⇒ NaCl + H2O

Using the formular, \frac{C_{A}V_{A}}{C_{B}V_{B} }=\frac{nA}{nB}    ..........equ1

whereC_{A} is the concentration of Acid,

          V_{A} is volume of acid

          C_{B} is concentration of the base

          V_{B} is volume of the base

          nA is the number of moles of Acid

          nB is number of moles of base

nA = 1,    nB=1 , V_{A}=20ml, C_{B}=0.022M, V_{B}=23.72mL

we will input these values into equation1 to solve for C_{A}

\frac{C_{A}*20}{0.022*23.72}=\frac{1}{1}

C_{A}*20=0.022*23.72

C_{A}=0.026092M

7 0
3 years ago
-Which of the following best explains how human activities can directly contribute to landslides?
Alborosie
Humans disturb the earth and because of this, the earth is weakened
8 0
3 years ago
2H2 + O2 → 2H2O
pantera1 [17]
Okay
Mr (H2O)= 18g
therefore moles of H2O
is 720.8/18= 40.04mol
the ratio of H2 to O2 to H2O is
2 : 1 : 2
so moles of H2 is same as H2O here
H2= 40.04moles

moles of O2 is half
so 40.04 x 0.5
20.02moles

grams of O2 is
its moles into Mr of O2
that's 20.02 x 32 = 640.64g

6 0
3 years ago
What phase(s) would you expect to observe when the substance is at a temperature of 275 kelvin?
pychu [463]
The phase of a substance at a temperature of 275 K or 1.85 degrees Celsius can be any of the three phases namely a solid, a liquid and a gas. This depends on the pressure where the substance is subjected. Also, the phase can be determined by a phase diagram where it shows the phase of a certain substance at a specific temperature and pressure.
4 0
3 years ago
According to the Brinsted -Lowry. what is an acid ? what is a base ? ​
sasho [114]

Answer:

According to the Brønsted definition, an acid is a substance capable of donating a proton, and a base is a substance capable of accepting a proton. ... The species giving up the proton is HCl, an acid. The species accepting the proton is water, the base. The species Cl- is the conjugate base of HCl.

8 0
3 years ago
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