3 years ago

A physical change occur when a

Chemistry

2 answers:

Bess [88]3 years ago

6 0

Glue gun melts a glue stick would be the physical change.

Viefleur [7K]3 years ago

5 0

The answer is C. Glue gun melts a glue stick.

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Element X has a charge of +2 and Element Y has a charge of -1.

bekas [8.4K]

the chemical equation will be XY2

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2 years ago

when 25 ml of 0.12 m aqueous ammonia is titrated with 0.12 m hydrobromic acid, what is the ph at the equivalence point?

maxonik [38]

The pH of solution at equivalence point is 5.2...

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2 years ago

What about solids ? Do solids move around like liquids and gases ?

Neporo4naja [7]

Answer:

No, gases move freely all over the place, liquids move more freely but in a more contained area, and solids the molecules are rigid, at the most the movement is small vibration as the molecules put pressure on one another to hold their form and stay in place.

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2 years ago

A titration is performed to calculate the concentration of a solution of a monoprotic acid. The buret is filled with a standardi

miskamm [114]

Answer:

The concentration of the acid is 117.92 ± 0.03 mM.

Explanation:

In this problem, the concentration of NaOH and the volume used is given. The volume pipetted from the acid is also given. The concentration of the acid is given by:

CNaOH * VNaOH = Cacid * Vacid

158.32 * (18.76-0.14) = C acid * 25

C acid = 117.92 mM

The propagation of error for this problem, which is a multiplication is the concentration of the acid multiplied by the error divided by its respective value as shown in the equation below

error = 117.92 * $\sqrt{\frac{0.05}{158.32}^{2} +\frac{0.03}{18.62}^{2} +\frac{0.03}{25}^{2} }$

The answer is 0.03 mM of uncertainty.

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3 years ago

Which statement BEST explains why liquids and gases can flow but solids cannot?

Natalka [10]

Answer:

Best answer is B

Explanation:

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3 years ago