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Stolb23 [73]
3 years ago
9

Has an asteroid hit Earth in the past

Chemistry
2 answers:
solniwko [45]3 years ago
7 0
—-Yes, I believe so—-
Brrunno [24]3 years ago
6 0

Yes

Explanation:

On 15 February 2013, an asteroid entered Earth's atmosphere over Russia as a fireball and exploded above the city of Chelyabinsk during its passage through the Ural Mountains region.

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A scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. What parti
zubka84 [21]

Answer:

The scientist is studying the He quarks

5 0
4 years ago
Read 2 more answers
complete the following table and calculate the decrease in the freezing point of water when 1 mol glycerol (CH3OH-CHOH-CH2OH), N
garik1379 [7]

The decrease in the freezing point of the solution is −1.86oC.

<h3>What is the decrease in the freezing point?</h3>

Now we know that the freezing point depression of a solid is a colligative property of the solution.

Thus we have that;

ΔT = K m i

ΔT = freezing point depression

K = freezing constant

m = molality of the solution

i = Van't Hoff factor

Thus;

molality =  1 mol/1 Kg = 1 m

ΔT = −1.86oC/m * 1 m * 1

ΔT =−1.86oC

Learn  more about freezing point:brainly.com/question/3121416

#SPJ1

5 0
2 years ago
the actual yield of a product in a reaction was measured as 2.80 g. if the theoretical yield of the product for the reaction is
olga_2 [115]

The percentage yield of the product if the actual yield was measured as 2.80 g and the theoretical yield is measured as 3.12 g is 11.43%.

<h3>How to calculate percentage yield?</h3>

The percentage yield of a substance can be calculated by dividing the difference between the actual and theoretical yield by the actual yield, then multiplied by 100.

Percentage yield = (theoretical yield - actual yield)/actual yield × 100

According to this question, the actual yield of a product in a reaction was measured as 2.80 and the theoretical yield of the product for the reaction is 3.12 g.

Percent yield = (3.12g - 2.80g)/2.80 × 100

Percent yield = 11.43%.

Therefore, percentage yield of the product if the actual yield was measured as 2.80 g and the theoretical yield is measured as 3.12 g is 11.43%.

Learn more about percent yield at: brainly.com/question/17042787

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5 0
2 years ago
what is the concentration of an NaOH solution that requires 50 mL of a 1.25 M H2SO4 solution to neutralize 78.0 ml of NaOH​
Dimas [21]

Answer:

  • The answer is the concentration of an NaOH = 1.6 M

Explanation:

The most common way to solve this kind of problem is to use the formula  

  • C₁ * V₁ = C₂ * V₂

In your problem,

For NaOH

C₁ =??     v₁= 78.0 mL = 0.078 L

For H₂SO₄

C₁ =1.25 M     v₁= 50.0 mL = 0.05 L

but you must note that for the reaction of NaOH with H₂SO₄

2 mol of NaOH raect with 1 mol H₂SO₄

So, by applying in above formula

  • C₁ * V₁ = 2 * C₂ * V₂
  • (C₁ * 0.078 L) = (2*  1.25 M * 0.05 L)
  • C₁ = (2*  1.25 M * 0.05 L) / (0.078 L) = 1.6 M  

<u>So, the answer is the concentration of an NaOH = 1.6 M</u>

3 0
3 years ago
A team of scientists is conducting tests to measure the boiling point of a liquid using a thermometer in the liquid. The team is
NISA [10]

The most reasonable step to take will be to check the calibration of the

thermometer to ensure that it is giving accurate readings.

Experiments which are done to be give the same results under standard

conditions. Common causes of incorrect results during the analysis of

boiling point of substances include heating the substance too rapidly or

the thermometer not being properly calibrated.

The thermometer is used to measure the temperature and so must be

properly calibrated to give accurate readings.

Read more on brainly.com/question/24657998

8 0
3 years ago
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