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3 years ago

I need help!!!! I need the answers

Chemistry

1 answer:

gayaneshka [121]3 years ago

5 0

To help you out with this was faster, I suggest you download the app called Socratic. It helps me with all of my classes.

Number 1: A

Number 2: C

Number 3: D

Number 4: B

Number 5: A

Number 6: C

Number 7: B

Number 8: C

Number 9: B (I think)

Number 10: A or B

Number 11: A

Number 12: A

Number 13: D

Number 14: D (I think)

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An unknown metal is dropped into 127 grams of water. The temperature of the water has been raised from 25OC to 28OC. Using the s

Gnesinka [82]

Answer:

he amount of heat gained by the water is 1.59 kJ

Explanation:

Relation between heat energy, specific heat and temperature change is as follows

Q = mCΔT

where, Q or q = heat energy

m = mass

C = specific heat =4.186J/g°C

ΔT = (28°C - 25°C) = 3°C

Now, putting the given values into the above formula as follows.

Q = mCΔT

= 127 × 4.186 × 3

= 1594.86 J or 1.59 kJ

Therefore, we can conclude that the amount of heat gained by the water is 1.59 kJ

5 0

3 years ago

An oven heats up and the whole kitchen becomes warm because of heat transfer by

Ad libitum [116K]

B, it's properly because of convection! Please, correct me if I'm wrong :>

6 0

3 years ago

What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO3 requires 20.22 mL o

Nina [5.8K]

Answer:

The concentration of NaCl = 0.3374 M

Explanation:

Given :

Molarity of AgNO₃ = 0.2503 M

Volume of AgNO₃ = 20.22 mL

The conversion of mL into L is shown below:

$1 mL= 10^{-3} L$

Thus, volume of the solution = 20.22×10⁻³ L

Molarity of a solution is the number of moles of solute present in 1 L of the solution.

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

The formula can be written for the calculation of moles as:

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

Thus,

$Moles\ of\ AgNO_3 =Molarity \times {Volume\ of\ the\ solution}$

$Moles\ of\ AgNO_3 =0.2503 \times {20.22\times 10^{-3}}\ moles$

$Moles\ of\ AgNO_3 = 5.0611 \times 10^{-3} moles$

The chemical reaction taking place:

$AgNO_3_(aq) + NaCl_(aq) \rightarrow AgCl_(s) + NaNO_3_(aq)$

According to reaction stoichiometry:

1 mole of AgNO₃ reacts with 1 mole of NaCl

Thus,

5.0611×10⁻³ moles of AgNO₃ reacts with 5.0611×10⁻³ moles of NaCl

Thus, moles of NaCl required = 5.0611×10⁻³ moles

Volume of NaCl required = 15.00 mL

The conversion of mL into L is shown below:

$1 mL= 10^{-3} L$

Thus, volume of the solution = 15.00×10⁻³ L

Applying in the formula of molarity as:

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

$Molarity\ of\ NaCl=\frac{5.0611\times 10^{-3}}{15.00\times 10^{-3}}$

$Molarity\ of\ NaCl= 0.3374 M$

Thus, the concentration of NaCl = 0.3374 M

6 0

3 years ago

This answer is incorrect.

Alexxandr [17]

I believe the correct answer would be B because you can't make chromosomes

7 0

3 years ago

Do oil and water mix?

lions [1.4K]

No they do not. Water is denser than oil so it sinks to the bottom and the oil floats.

6 0

3 years ago