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2 years ago

SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP

Chemistry

2 answers:

vfiekz [6]2 years ago

8 0

Answer:

Explanation:

You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.

emmainna [20.7K]2 years ago

7 0

Answer:

Your answer will be (D).

Hope this helps!

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Formula empirica del glutamato monosódico

Citrus2011 [14]

Answer:

C₅H₈NO₄Na

Explanation:

8 0

2 years ago

One solution has a formula C (n) H (2n) O (n) If this material weighs 288 grams, dissolves in weight 90 grams, the solution will

saw5 [17]

Explanation:

The given data is as follows.

Boiling point of water ( $T^{o}_{b}) = 100^{o}C$ = (100 + 273) K = 323 K,

Boiling point of solution ( $T_{b}) = 101.24^{o}C$ = (101.24 + 273) K = 374.24 K

Hence, change in temperature will be calculated as follows.

$\Delta T_{b} = (T_{b} - T^{o}_{b})$

= 374.24 K - 323 K

= 1.24 K

As molality is defined as the moles of solute present in kg of solvent.

Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

Let molar mass of the solute is x grams.

Therefore, Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

m = $\frac{288 g \times 1000}{x g \times 90}$

= $\frac{3200}{x}$

As, $\Delta T_{b} = k_{b} \times molality$

$1.24 = 0.512 ^{o}C/m \times \frac{3200}{x}$

x = $\frac{0.512 ^{o}C/m \times 3200}{1.24}$

= 1321.29 g

This means that the molar mass of the given compound is 1321.29 g.

It is given that molecular formula is $C_{n}H_{2n}O_{n}$ .

As, its empirical formula is $CH_{2}O$ and mass is 30 g/mol. Hence, calculate the value of n as follows.

n = $\frac{\text{Molecular mass}}{\text{Empirical mass}}$

= $\frac{1321.29 g}{30 g/mol}$

= 44 mol

Thus, we can conclude that the formula of given material is $C_{44}H_{88}O_{44}$ .

4 0

2 years ago

1. Write formulas for the binary ionic compounds formed between

adell [148]

Answer:

a) KI

b) MgCl2

c) Na2S

d) Al2S3

e) AlN

Explanation:

8 0

3 years ago

Read 2 more answers

How will the temperature of the water be affected by the dissolving of the lithium oxide?

lesantik [10]

Answer:

i can Help you but iam using my phone so typing is really hectic. reach me via app on +254743503332

6 0

1 year ago

4. How Does Extreme conditions<br> accelerate erosion ?

Marianna [84]

Answer:

Explanation:

Geologic erosion influences soil formation and distribution. Accelerated erosion results from the removal of natural vegetation by human activities such as farming, ranching, forestry, and construction. The production of agricultural and forest products can be affected by excessive erosion

6 0

2 years ago