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3 years ago

10

Which evidence best supports scientists' inferences about the origin and age of the universe?

2 answers:

dsp733 years ago

6 0

Answer:

The answer is cosmic background radiation.

Explanation:

Background cosmic radiation is defined as the energy left over from the Big Bang, which produced the origin of the universe. This prediction was made by physicist George Gamow, Robert C. Herman, and Ralph A. Alpher.

Background cosmic radiation was first detected by radio astronomers Arno Penzias and Robert Wilson. The Big Bang theory predicted a specific characteristic of cosmic background radiation, which must be the spectrum of a body being in thermodynamic equilibrium. Through the COBE satellite it was possible to measure the spectrum of the cosmic background radiation and it was determined that this radiation is the same as the theory predicts.

BabaBlast [244]3 years ago

3 0

Do you have a picture for reference?

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0.25 mol of nitric acid is used to make a 0.10 M nitric acid solution. What is the total volume of nitric acid in liters

Lelu [443]

Answer:

2.5 L will be the volume of HNO₃

Explanation:

To find out the total volume of nitric acid in liters we begin from molarity.

HNO₃ solution is 0.10 M

This means that 0.10 moles are contained in 1L of solution.

As we used 0.25 moles of nitric, let's determine the volume by a rule of three:

0.10 moles of nitric acid are contained in 1L of solution

0.25 moles of nitric acid will be contained in (0.25 . 1) / 0.1 = 2.5 L

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3 years ago

How many unchanged atoms would remain after 3 half-lives if the initial sample had 600 atoms? Explain.

Leviafan [203]

75 divide 600/2 300/2 150/2

7 0

4 years ago

5.6 moles of gold contain how many atoms? A. 34 atoms B. 9.3 × 10-22 atoms C. 9.3 × 1023 atoms D. 3.4 × 1024 atoms

Elza [17]

Answer:

the awnswer would be d

Explanation:

5 0

4 years ago

Read 2 more answers

What causes each new row of the periodic table

taurus [48]

Answer:

elements have the same number of valence electrons and similar chemical properties.

Explanation:

they have the same number

8 0

4 years ago

Calculate the missing variables in each experiment below using Avogadro’s law.

blagie [28]

Answer:

The answer to your question is: letter c

Explanation:

Data

V1 = 612 ml n1 = 9.11 mol

V2 = 123 ml n2 = ?

Formula

$\frac{V1}{n1} = \frac{V2}{n2}$

$n2 = \frac{n1V2}{V1}$

$n2 = \frac{(9.11)((123)}{(612)}$

n2 = 1.83 mol

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3 years ago