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shtirl [24]
3 years ago
9

What does the law of conservation of energy state?

Chemistry
1 answer:
Anarel [89]3 years ago
4 0

Answer:

it states that the total mass of the products are the same as the total mass of the reactants in a chemical reaction.

Explanation:

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According to the 2010 u.s. census, ______ percent of women had college degrees compared to approximately _____ percent of men.
Misha Larkins [42]

According to the 2010 U.S. Census, <u>37 </u>percent of women had college degrees compared to approximately <u>35 </u>percent of men.

In 1970 and early 1980, women have surpassed men in number of bachelor's degree or master's degree in united state.

The women gets more degree to gain financial benefits. The gap in earning is greater in female graduate and non- graduate as compare to male graduate and non-graduate. To give education to girls saves lives and builds stronger families, communication and economic too.

learn about financial and benefits

brainly.com/question/19993778

#SPJ4

8 0
2 years ago
Which scientist is credited with developing the orbital model of the atom? A. J.J. Thomson. . B. Ernest Rutherford. . c. Niels B
Yuliya22 [10]
C.) Neils Bohr is credited with that....
4 0
3 years ago
Read 2 more answers
A piece of fossilized wood has a carbon-14 radioactivity that is 1/4 that of new wood. the half-life of carbon-14 is 5730 years.
Marizza181 [45]

Answer:

1.146 x 10⁴ year.

Explanation:

  • The decay of carbon-14 is a first order reaction.
  • The rate constant of the reaction (k) in a first order reaction = ln (2)/half-life = 0.693/(5730 year) = 1.21 x 10⁻⁴ year⁻¹.
  • The integration law of a first order reaction is:

<em>kt = ln [A₀]/[A]</em>

<em></em>

k is the rate constant = 1.21 x 10⁻⁴ year⁻¹.

t is the time = ??? years.

[A₀] is the initial percentage of carbon-14 = 100.0 %.

[A] is the remaining percentage of carbon-14 = 1/4[A₀] = 25.0 %.

∵ kt = ln [Ao]/[A]

∴ (1.21 x 10⁻⁴ year⁻¹)(t) = ln (100.0%)/[25.0 %]

(1.21 x 10⁻⁴ year⁻¹)(t) = 1.386.

∴ <em>t </em>= 1.386/ (1.21 x 10⁻⁴ year⁻¹) =  <em>1.146 x 10⁴ year.</em>

3 0
4 years ago
ID = 801 720 6270<br> Pas = 1234<br><br> Jôîn frm zøôm app​
yan [13]

Answer:

I'm here for the pints

Explanation:

thank man UwU

5 0
3 years ago
Shells constructed from seawater incorporate the 18O/16O ratio of seawater during their lifetime within their CaCO3 shell walls,
Ksivusya [100]

Answer:

Hello, the above question is not complete, nonetheless let us check somethings out.

Explanation:

Paleothermometer definition is from two words, that is "Paleo" which means something that is old and ''thermometer" which is an instrument for measuring temperature. So, if we add this up, Paleothermometer is an instrument for measuring "old" temperature, that is temperature. One of the Paleothermometer that is been used is the δ18O which is the one in the question that has isotopic ratio of 18O/16O, and it deals with the measurement of 18O to 16O. The others include Alkenones Paleothermometer, Mg/Ca Paleothermometer, Leaf physiognomy and so on.

If the values of the isotopic ratio that is 18O/16O ratio is low, then the temperature is high. To Calculate the 18O/16O ratio for ancient ocean then we will be using the equation below;

δ18O = (z - 1) × 1000. Where z= [(18O/16O)/( 18O/16O)sm. And sm= standard mean.

6 0
3 years ago
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