3 years ago

HELP ME PLEASEEE ILL MARk u the brainliest

Chemistry

2 answers:

Novay_Z [31]3 years ago

8 0

Answer:

3rd or 4th answer is correct

belka [17]3 years ago

5 0

OPTION B is the correct answer

You might be interested in

An object is either copper or brass. The density of copper is 8.96g/ml. The density of brass is 8.73g/mL. I find that my object

Brrunno [24]

I like pp hehehehehe hehhe

6 0

4 years ago

Read 2 more answers

The empirical formula for a compound is C2H4NO. If its molar mass is 232.2 g/mol, what is the molecular formula of the compound?

Irina18 [472]

Empirical formula mass

C2H4NO
2(12)+4(1)+14+16
30+24+4
58g/mol

Molar mass=232.2g/mol

Find n

Molar mass/Empirical formula mass
232.2/58
4

Molecular formula

n×Empirical formula
4(C2H4NO)
C8H16(NO)_4

4 0

2 years ago

A hot metal is placed in 100.0 g sample of water and it causes the temperature of the water to increase from 25 C to 27 C. How m

Arisa [49]

Answer: $836.8\ J$

Explanation:

Given

Mass of water in the sample is $m=100\ g$

Temperature changes from $25^{\circ}C$ to $27^{\circ}C$

Change in temperature is $\Delta T=27-25=2^{\circ}C\ \text{or}\ 2\ K$

We know, specific heat of water is $c=4.184\ J/g-K$

Heat absorbed is given by

$\Rightarrow Q=mc\Delta T\\\Rightarrow Q=100\times 4.184\times 2\\\Rightarrow Q=836.8\ J$

Thus, water absorbs $836.8\ J$ of heat from hot plate.

5 0

3 years ago

Given the reaction: HC2H3O2(aq) + H2O ↔ H3O+(aq) + C2H3O2-(aq) When the reaction reaches a state of equilibrium, the concentrati

marta [7]

The correct answer for the question that is being presented above is this one: "2. are equal to the concentrations of the products." Given the reaction: HC2H3O2(aq) + H2O ↔ H3O+(aq) + C2H3O2-(aq) When the reaction reaches a state of equilibrium, the concentration of product is equal yo the reactant.<span> </span>

3 0

3 years ago

4. What are the two ways that you can recognize a numeric place changes (1s vs. 10s vs. 100s) on a micropipettor?

Serjik [45]

it's 100,0002 pn a micropipettor

8 0

2 years ago