All categories

2 years ago

What are some of the problems with using flame tests as a way to identify substances?

1 answer:

3 0

Different substances can produce similar results in color. This can cause uncertainty with identifying the substance.

You might be interested in

What’s a predator? Are predators animals?

Setler [38]

Answer:

its an animal that preys on others

Explanation:

5 0

2 years ago

Read 2 more answers

Rank the following in order of increasing (lowest to highest) reactivity:

choli [55]

Answer:

a) Li<Na<Rb

b) P<S

c) Rn<Xe

d) Hg<W<Cs

4 0

2 years ago

What is determined by calculating the slope of the position versus time graph distance

Ymorist [56]

Answer:

Determining the Slope on a p-t Graph. It was learned earlier in Lesson 3 that the slope of the line on a position versus time graph is equal to the velocity of the object. ... If the object has a velocity of 0 m/s, then the slope of the line will be 0 m/s. The slope of the line on a position versus time graph tells it all.

Explanation:

#carryonlearning

6 0

2 years ago

Read 2 more answers

A patient taking _______ would have a history of mental depression.

ohaa [14]

The answer is Prozac

4 0

3 years ago

6 Fe2+ (aq) + Cr2O72− (aq) + 14 H+ (aq) → 6 Fe3+ (aq) + 2 Cr3+ (aq) + 7 H2O (aq) If the titration of 23 mL of an iron(II) soluti

ratelena [41]

Answer:

1.047 M

Explanation:

The given reaction:

$6Fe^{2+}_{(aq)}+Cr_2O_7^{2-}_{(aq)}+14H^+_{(aq)}\rightarrow 6Fe^{3+}_{(aq)}+2Cr^{3+}_{(aq)}+7H_2O_{(aq)}$

For dichromate :

Molarity = 0.254 M

Volume = 15.8 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 15.8 ×10⁻³ L

Thus, moles of dichromate :

$Moles=0.254 \times {15.8\times 10^{-3}}\ moles$

Moles of dichromate = 0.0040132 moles

1 mole of dichromate react with 6 moles of iron(II) solution

Thus,

0.0040132 moles of dichromate react with 6 × 0.0040132 moles of iron(II) solution

Moles of iron(II) solution = 0.02408 moles

Volume = 23 mL = 0.023 L

Considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Molarity = 0.02408 / 0.023 = 1.047 M

7 0

2 years ago