2 years ago

There is a theory that gravity could pull galaxies back together, causing a reverse big bang.

Chemistry

2 answers:

Mrrafil [7]2 years ago

8 0

C. the expansion of the universe is accelerating

Alex787 [66]2 years ago

8 0

Answer:

Explanation:

You might be interested in

Propose a 3-step reaction for the conversion of cyclopentene to propanedioic acid

Gnom [1K]

I
don't know because this is the question which I never heard

6 0

2 years ago

Determine the oxidation state of the metal ion in [co(nh3)5br]2+. express your answer as an integer.

Zanzabum

[Co(NH₃)₅Br]²⁺

Ligands and charges on them,

5 × NH₃ = 5 × 0 = 0

1 × Br⁻¹ = 1 × -1 = -1

Charge on sphere = +2

So, putting values in equation,

Co + (0)₅ - 1 = +2

Co + 0 - 1 = +2

Co - 1 = +2

Co = +2 + 1

Co = +3

Result:
Oxidation state of Co in [Co(NH₃)₅Br]²⁺ is +3.

7 0

2 years ago

What is the formula name for Co3N2

Ede4ka [16]

Answer:

Cobaltous Nitride,I think so anyway.......

6 0

2 years ago

Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effe

Sergio039 [100]

Answer:

light with a high enough intensity

Explanation:

4 0

2 years ago

The reactant concentration in a second-order reaction was 0.560 m after 115 s and 3.30×10−2 m after 735 s . what is the rate con

Aloiza [94]

Use the formula for second order reaction:

$\frac{1}{C} = \frac{1}{C_0} + kt$

C = concentration at time t
C0 = initial conc.
k = rate constant
t = time

1st equation : $\frac{1}{0.56} = \frac{1}{C_0} + 115k$

2nd Equation: $\frac{1}{0.033} = \frac{1}{C_0} + 735k$

Find $\frac{1}{C_0}$ from 1st equation and put it in 2nd equation:

$\frac{1}{0.033} = \frac{1}{0.56} - 115k + 735k$

$\frac{1}{0.033} - \frac{1}{0.56} = 620k$

k = 0.046

3 0

3 years ago