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katrin [286]
2 years ago
8

Which of the following has kinetic energy?

Chemistry
2 answers:
Volgvan2 years ago
6 0

Answer:

the correct answer is :-

C. a gymnast doing a cartwheel

hope it helps

have a nice day

Molodets [167]2 years ago
3 0

Answer:

c ) a gymnast doing a cartwheel. ........

hope you like ☺️

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How many grams are in 4.5 x 10^22 molecules of Ba(NO2)2
NNADVOKAT [17]

Answer:

17 g Ba(NO₂)₂

General Formulas and Concepts:

<u>Chemistry</u>

  • Stoichiometry
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

<u>Step 1: Define</u>

4.5 × 10²² molecules Ba(NO₂)₂

<u>Step 2: Define conversion</u>

Molar Mass of Ba - 137.33 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Ba(NO₂)₂ - 137.33 + 2(14.01) + 4(16.00) = 229.35 g/mol

<u>Step 3: Dimensional Analysis</u>

<u />4.5 \cdot 10^{22} \ mc \ Ba(NO_2)_2(\frac{1 \ mol \ Ba(NO_2)_2}{6.022 \cdot 10^{23} \ mc \ Ba(NO_2)_2} )(\frac{229.35 \ g \ Ba(NO_2)_2}{1 \ mol \ Ba(NO_2)_2} )

= 17.1384 g Ba(NO₂)₂

<u>Step 4: Check</u>

<em>We are given 2 sig figs. Follow sig fig rules.</em>

17.1384 g Ba(NO₂)₂ ≈ 17 g Ba(NO₂)₂

7 0
2 years ago
All gases diffuse rapidly but different rates. For example Carbon dioxide diffuses slower than oxygen gas and hydrogen gas. The
Mumz [18]
The answer is c your welcome
7 0
3 years ago
Read 2 more answers
55
nydimaria [60]

Answer:

correct answer i C i think so

8 0
3 years ago
Read 2 more answers
Can someone help with 10 a and b please
weqwewe [10]

Answer:

for question a element A and B are isobars

for question b element C and D have the same atomic numbers.

Explanation:

  1. element A and B are isobars because they have the same mass numbers but different atomic numbers. The different atomic numbers is  as a result of the difference in proton number of each elements A and B. (A and B are two different elements).
  2. element C and D are isotopes of the same element  because they have the same atomic numbers (same number of protons) but differ in number of neutrons resulting in the different number of mass numbers. (C and D are the same elements)

7 0
3 years ago
At a certain temperature, the decomposition of NO2 is second order with a rate constant of 2.85 M-1min-1. If one starts with 1.7
alex41 [277]

Answer: It will take 0.50 minutes for it to decompose to 28.2% of its initial value

Explanation:

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

a= concentration left after time t = \frac{28.2}{100}\times 1.77=0.50M

k = rate constant =2.85M^{-1}min^{-1}

{a_0}  = initial concentration = 1.77

t= time taken for decomposition

\frac{1}{0.50}=2.85\times t+\frac{1}{1.77}

t=0.50min

Thus it will take 0.50 minutes for it to decompose to 28.2% of its initial value

8 0
3 years ago
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