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Molodets [167]
3 years ago
6

We use the Scientific method to minimize human error in experiments.

Chemistry
1 answer:
Liula [17]3 years ago
6 0

Answer:

false false false false false

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In an experiment on obedience to authority, one subject tells another that the shocks might not be real. Which issue of invalidi
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4 years ago
A sample of ammonium nitrate, weighing 25.2 g, was added to a 150.0 mL container of H2O at 20.0 °C, and then is thoroughly disso
OLga [1]

Explanation:

It is known that the relation between heat energy, specific heat and change in temperature is as follows.

                            q = m \times C \times \Delta T

where,         q = heat released or absorbed

                    m = mass of substance

                    C = specific heat

             \Delta T = change in temperature

It is given that mass is 25.2 g and it is added to 150 ml container so total mass will be (25.2 g + 150 g) = 175.2 g, T_{1} is 20^{o}C, T_{2} is 8.5^{o}C, and specific heat of water is 4.184 J/g ^{o}C.

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

                  q = m \times C \times \Delta T

                     = 175.2 g \times 4.184 J/g^{o}C \times (8.5 - 20)^{o}C

                      = 175.2 g \times 4.184 J/g^{o}C \times -11.5^{o}C

                     = -8430 J

As, 1 J = 0.001 kJ. Hence, -8430 J will also be equal to -8.43 kJ. The negative sign indicates that heat is being lost.

Thus, we can conclude that heat (kJ) was lost by the solution (surroundings) is 8.43 kJ.

6 0
4 years ago
What do the quantum numbers of electrons represent?
soldier1979 [14.2K]
It represents The number of subshells, or , describes the shape of the orbital. Itcan also be used to determine the number of angular nodes. The magnetic quantum number, ml, describes the energy levels in a subshell, and ms refers to the spin on the electron, which can either be up or down.
4 0
3 years ago
Given its formula and Avogadro's Number (6.02 x 10^23 molecules/mol), deduce how many molecules are present in 3 x 10^-16 grams
marissa [1.9K]

Answer:

5 × 10⁵ molecules (500,000 molecules)

Explanation:

Step 1: Convert 3 × 10⁻¹⁶ g to moles

We will use the molar mass of TCDD (321.97 g/mol).

3 × 10⁻¹⁶ g × 1 mol/321.97 g = 9 × 10⁻¹⁹ mol

Step 2: Convert 9 × 10⁻¹⁹ mol to molecules

The required conversion factor is Avogadro's number (6.02 × 10²³ molecules/mol).

9 × 10⁻¹⁹ mol × 6.02 × 10²³ molecules/1 mol = 5 × 10⁵ molecules

3 0
3 years ago
What's the meaning of love? ​
Shalnov [3]

Answer: Love is when you feel like you can touch the sky when your around that person, when your at your best self or that person and when you put their needs before yours because your needs just don't matter. When you feel like you can't stop thinking about that person or you can stop smiling when you think of them. Its when you feel this warm, safe feeling when your around them. And if you really love them then my answer should be true for you.

Explanation:

because iv'e felt and have been in love before....

5 0
3 years ago
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