1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Travka [436]
2 years ago
13

Please help me with this thank you <3

Chemistry
2 answers:
JulsSmile [24]2 years ago
7 0

Answer:

I think C and D may be the answers (sorry if i got wrong :( )

Explanation:

butalik [34]2 years ago
4 0

Answer:

C and D

Explanation:

Claims based on science are claims that can be backed up by data and evidence. In the sentence "Data from ice cores show that global temperatures are rising dramatically.", the part "Data from" inclines that there is factually proof backing up the claim. Part of the sentence "Satellite imagery shows.." inclines that there is also proof/evidence backing this claim. The other two sentences are <em>opinions</em> based on science. Instead, they should give some sort of data/evidence that would support that claim.

You might be interested in
Help me please and ty
satela [25.4K]

Answer:

it the same side with the other side you fellow the other side

Explanation:

7 0
3 years ago
Read 2 more answers
The composition of a liquid-phase reaction 2A - B was monitored spectrophotometrically. The following data was obtained: t/min 0
o-na [289]

Answer:

1) The order of the reaction is of FIRST ORDER

2)   Rate constant k = 5.667 × 10 ⁻⁴

Explanation:

From the given information:

The composition of a liquid-phase reaction 2A - B was monitored spectrophotometrically.

liquid-phase reaction 2A - B signifies that the reaction is of FIRST ORDER where the rate of this reaction is directly proportional to the concentration of A.

The following data was obtained:

t/min                    0         10         20          30             40          ∞

conc B/(mol/L)    0       0.089    0.153     0.200       0.230    0.312

For  a first order reaction:

K = \dfrac{1}{t} \ In ( \dfrac{C_{\infty} - C_o}{C_{\infty} - C_t})

where :

K = proportionality  constant or the rate constant for the specific reaction rate

t = time of reaction

C_o = initial concentration at time t

C _{\infty} = final concentration at time t

C_t = concentration at time t

To start with the value of t when t = 10 mins

K_1 = \dfrac{1}{10} \ In ( \dfrac{0.312 - 0}{0.312 - 0.089})

K_1 = \dfrac{1}{10} \ In ( \dfrac{0.312 }{0.223})

K_1 =0.03358 \  min^{-1}

K_1 \simeq 0.034 \  min^{-1}

When t = 20

K_2= \dfrac{1}{20} \ In ( \dfrac{0.312 - 0}{0.312 - 0.153})

K_2= 0.05 \times  \ In ( 1.9623)

K_2=0.03371 \ min^{-1}

K_2 \simeq 0.034 \ min^{-1}

When t = 30

K_3= \dfrac{1}{30} \ In ( \dfrac{0.312 - 0}{0.312 - 0.200})

K_3= 0.0333 \times  \ In ( \dfrac{0.312}{0.112})

K_3= 0.0333 \times  \ 1.0245

K_3 = 0.03412 \ min^{-1}

K_3 = 0.034 \ min^{-1}

When t = 40

K_4= \dfrac{1}{40} \ In ( \dfrac{0.312 - 0}{0.312 - 0.230})

K_4=0.025 \times  \ In ( \dfrac{0.312}{0.082})

K_4=0.025 \times  \ In ( 3.8048)

K_4=0.03340 \ min^{-1}

We can see that at the different time rates, the rate constant of k_1, k_2, k_3, and k_4 all have similar constant values

As such :

Rate constant k = 0.034 min⁻¹

Converting it to seconds ; we have :

60 seconds = 1 min

∴

0.034 min⁻¹ =(0.034/60) seconds

= 5.667 × 10 ⁻⁴ seconds

Rate constant k = 5.667 × 10 ⁻⁴

4 0
3 years ago
One difference between d-glucose and l-glucose is
dimulka [17.4K]
<span>only D-glucose is found in disaccharides and polysaccharides.</span>
6 0
3 years ago
The ability to travel great distances in the shortest time was achieved by which invention?
Nutka1998 [239]

By space travel.

Or aeroplanes.

Whichever one is in your choices

6 0
3 years ago
What would be the volume of 0.500 mole of an<br> ideal gas at STP
Katena32 [7]
I think v=11.21 right?
8 0
2 years ago
Other questions:
  • If Donald Trump has 5 kids how many does Hillary have Answer 0 cause she got an abortion killing her flesh and blood. DONT USE A
    6·2 answers
  • How many moles of glucose (C6H12O6) are in 5.0 liters of a 2.5 M C6H12O6 solution?
    14·2 answers
  • How do you determine the percent yield of a chemical reaction?
    8·1 answer
  • Antoine has a 100-gram sample of water in a sealed 1 liter container. He observes that when the water is moved to a sealed 2-lit
    6·2 answers
  • Help fast... thanks I’ll give you brainliest
    6·1 answer
  • What mass of H2 is needed to react with 8.5 g of O2 according to the following equation G plus O2 (G)plus H2 ( G)?
    12·1 answer
  • How many moles of H2O form when 4.5 moles O2 reacts?
    14·1 answer
  • Janet runs 6.4 miles in one hour. Is it speed or velocity or acceleration
    14·1 answer
  • Why does a can of diet cola float in water but a can of regular cola does not
    13·1 answer
  • A sample of gold has a mass of 100 grams and a volume of 5cm^3, calculate the density by dividing the mass by volume
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!