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suter [353]
3 years ago
10

Please answer asap Will give brainliest​

Chemistry
1 answer:
lisabon 2012 [21]3 years ago
6 0
Answer: Scientific notation

A• 369712= 3.69712x10^5
B• 78200= 7.82x10^4
C• 369= 3.69x10^2
D• 0.6438= 6.438x10^-1
E• 0.10205= 1.0205x10^-1
F• 0.1250= 1.250x10^-1
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Which rock composed of a mineral that can be used for the production of cement?
Kamila [148]
I believe the answer is Limestone 
Limestone is one of the vital minerals that is used to make cement. It is a sedimentary rock composed mostly of the calcium carbonate and, according to mineral coalition, it comprises about 15% of the Earth's sedimentary crust. 
6 0
4 years ago
Select all the correct answers.
elena-14-01-66 [18.8K]
<h3>Hi!</h3>

<h3>The correct options would be:</h3>

1, 3 and 4.

In an alpha decay, the atom's mass number is reduced by 4, and the atomic number is reduced by two following the emission of an alpha particle (2 protons and 2 neutrons).

In gamma decay, the atom releases energy spontaneously to stabilize itself, and this energy is released in the form of photons.

<h3>Hope this helps!</h3>
5 0
4 years ago
A chemical equation can be used to solve stoichiometry problems provided that it....
Zolol [24]

Answer:

includes the coefficients that are needed for balancing the equation.

Explanation:

3 0
3 years ago
Read 2 more answers
An artifact originally had 16 grams of​ carbon-14 present. the decay model upper a equals 16 e superscript negative 0.000121 ta=
xeze [42]

<u>Given:</u>

Initial amount of carbon, A₀ = 16 g

Decay model = 16exp(-0.000121t)

t = 90769076 years

<u>To determine:</u>

the amount of C-14 after 90769076 years

<u>Explanation:</u>

The radioactive decay model can be expressed as:

A = A₀exp(-kt)

where A = concentration of the radioactive species after time t

A₀ = initial concentration

k = decay constant

Based on the given data :

A = 16 * exp(-0.000121*90769076) = 16(0) = 0

Ans: Based on the decay model there will be no C-14 left after 90769076 years

3 0
4 years ago
Read 2 more answers
If 0.25 liters of solution contains 0.030 moles of KOH what is the molarity of the solution?
sdas [7]

Answer:

The molarity of the solution is 0,12 M.

Explanation:

We calculate the molarity, which is a concentration measure that indicates the moles of solute (in this case KOH) in 1000ml of solution (1 liter):

0,25 L solution----- 0,030 moles of KOH

1 L solution----x= (1 L solution x 0,030 moles of KOH)/0,25 L solution

x= 0,12 moles of KOH ---> <em>The solution is 0,12 M</em>

7 0
3 years ago
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