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3 years ago

Which of the following statements is true?

Chemistry

1 answer:

Zinaida [17]3 years ago

8 0

Answer:

Parasites often show cospeciation because they must evolve with ther hosts.

Explanation:

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SOS TESTING:

andrezito [222]

Answer:

Condensation

Explanation:

An exothermic process is one in which heat is lost. Condensation is a change of state from gas to liquid. Thus is loses heat.

HOPE THIS HELPED

4 0

3 years ago

You heat 51 grams of magnesium over a Bunsen burner for several minutes until it reacts with oxygen in the air. Then you weigh t

garik1379 [7]

Answer:

The mass was there all along, it was just in the air. The weight of the oxygen from the air is not weighed in the beginning, only at the end as part of the product, making it seem like there is a total mass change.

8 0

3 years ago

Convert 25 liters per hour to milliliters per second.

Dominik [7]

Answer:

6.94444

Explanation:

4 0

3 years ago

Read 2 more answers

Write balanced complete ionic equation for hcl(aq)+lioh(aq)→h2o(l)+licl(aq) express your answer as a chemical equation. identify

Svet_ta [14]

Explanation:

An equation is said to be balanced when the number of atoms on both reactant and product side are equal in number.

Whereas an equation where electrolytes in an aqueous solution are represented as dissociated ions is known as an ionic equation.

For example, $HCl(aq) + LiOH(aq) \rightarrow H_{2}O(l) + LiCl(aq)$ can be represented in ionic form as follows.

$H^{+} + Cl^{-} + Li^{+} + OH^{-} \rightarrow H_{2}O(l) + Li^{+} + Cl^{-}$

Now, cancelling the common ions present on both sides of the equation. The resulting, ionic equation will be as follows.

$H^{+} + OH^{-} \rightarrow H_{2}O(l)$

8 0

3 years ago

Read 2 more answers

Assume the molality of isoborneol in your product is 0.275 mol/kg. What is the melting point of your impure sample given that th

aliina [53]

Answer:

168°C is the melting point of your impure sample.

Explanation:

Melting point of pure camphor= T =179°C

Melting point of sample = $T_f$ = ?

Depression in freezing point = $\Delta T_f$

Depression in freezing point is also given by formula:

$\Delta T_f=i\times K_f\times m$

$K_f$ = The freezing point depression constant

m = molality of the sample = 0.275 mol/kg

i = van't Hoff factor

We have: $K_f$ = 40°C kg/mol

i = 1 ( non electrolyte)

$\Delta T_f=1\times 40^oC kg/mol\times 0.275 mol/kg$

$\Delta T_f=11^oC$

$\Delta T_f=T- T_f$

$T_f=T- \Delta T_f=179^oC-11^oC=168^oC$

168°C is the melting point of your impure sample.

4 0

3 years ago