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Alex17521 [72]
2 years ago
10

What is the number of neutrons in the element Nickel?

Chemistry
2 answers:
Lelu [443]2 years ago
5 0

Answer:

Number of Protons, 28. Number of Neutrons, 31. Number of Electrons, 28

Explanation:

N/A

kozerog [31]2 years ago
4 0

answer: nickel element has 30 neutrons

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3 years ago
How many milliliters of 0.100 m naoh are required to neutralize 9.00 ml of 0.0500 m hcl?
BabaBlast [244]
V  ( NaOH ) = mL ?

M ( NaOH ) = 0.100 M

V ( HCl ) = 9.00 mL / 1000 => 0.009 L

M ( HCl ) = 0.0500 M

number of moles HCl:

n = M x V

n = 0.009 x 0.0500 => 0.00045 moles HCl

mole ratio:

<span>HCl + NaOH = NaCl + H2O
</span>
 1 mole HCl ---------------- 1 mole NaOH
 0.00045 moles HCl ----- ??

0.00045 x 1 / 1 => 0.00045 moles of NaOH

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0.100 = 0.00045 / V

V = 0.00045 / 0.100

V = 0.0045 L

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6 0
3 years ago
The radioactive decay of a certain sample produced 846 disintegrations per minute. exactly 3.00 days later, the rate of decay wa
Margarita [4]

Answer:

\boxed{\text{1.81 da}}

Explanation:

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The integrated rate law for radioactive decay is 1

\ln\dfrac{A_{0}}{A_{t}} = kt

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A₀ and A_t are the counts at t = 0 and t

k is the radioactive decay constant

\ln \dfrac{846}{269} = k \times 3.00\\\\\ln3.145 = 3.00k\\1.146 = 3.00k\\\\k =\dfrac{1.146}{3}\\\\k = \text{0.382 /da}\\

2. Calculate the half-life

t_{\frac{1}{2}} = \dfrac{\ln2}{k} = \dfrac{\ln2}{0.382} = \text{1.81 da}

The half-life for decay is \boxed{\textbf{1.81 da}}.

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Explanation:

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2 years ago
Acetaldehyde and butanoic acid must have the same
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Answer:

dsvcsdc

Explanation:

7 0
3 years ago
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