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avanturin [10]
3 years ago
8

Can you help me with 2 and 3 please

Chemistry
1 answer:
Citrus2011 [14]3 years ago
5 0
Bacteria --> corn --> mouse --> hawk

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A fruit-and-oatmeal bar contains 142 nutritional Calories. Convert this energy to calories
madreJ [45]

Answer:

a fruit and oatmeal bar contains 142000 calories.

A nutritional calorie, or kilocalorie, is equal to 1000 calories.

E = 142 kcal · 1000 cal/kcal.

E = 142 000 cal.

Calorie (cal), or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius.

One small calorie is approximately 4.2 joules.

A calorie is a unit of energy.

Explanation:

hope it helps  :)

4 0
2 years ago
HELP!!!
WARRIOR [948]

Answer:

no

Explanation:

4 0
2 years ago
A nucleus with four protons has total positive charge
Sladkaya [172]
It would have a charge of 4+
7 0
3 years ago
Read 2 more answers
How does the line spectra are used to identify elements and what they indicate about atoms?
olga nikolaevna [1]
<span>we know that each element has an unique spectra and it can be used to identify the element. it shows that the energy levels of the electrons and different colors are the result of different wavelengths.
hope it helps
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3 0
3 years ago
The gas phase decomposition of sulfuryl chloride at 600 K SO2Cl2(g)SO2(g) + Cl2(g) is first order in SO2Cl2. During one experime
krok68 [10]

Answer: The rate constant for the reaction is 3.96\times 10^{-3}min^{-1}

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample = 559 min

a = let initial amount of the reactant = 2.83\times 10^{-3}

a - x = amount left after decay process  = 3.06\times 10^{-4}

559min=\frac{2.303}{k}\log\frac{2.83\times 10^{-3}}{3.06\times 10^{-4}}

k=\frac{2.303}{559}\log\frac{2.83\times 10^{-3}}{3.06\times 10^{-4}}

k=3.96\times 10^{-3}min^{-1}

The rate constant for the reaction is 3.96\times 10^{-3}min^{-1}

6 0
3 years ago
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