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MariettaO [177]
3 years ago
10

2.(05.05 LC)

Chemistry
1 answer:
kati45 [8]3 years ago
8 0

Answer:  5 plates

Explanation:

Because you have 5 sandwiches total

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Can people tell the difference between sugar and aartifiial sweeteners
HACTEHA [7]
1. Sugar refers to easily metabolized carbohydrate; sweetener is an additive that is added to foods for the sweetening effect
2. Sugar in all its forms does not require authentication; sweeteners need to be approved by an accreditation body or the EU
3. Sugar is caloric, while sweeteners can be caloric or non caloric in nature
4. Intensive sweeteners are prepared by synthetic procedure and provide little or no energy whatsoever; sugar substances eliminate the crucial minerals from your diet

http://www.differencebetween.net/object/difference-between-sugar-and-sweetener/
4 0
3 years ago
Calculate the mass of sodium bromide dihydrate is required to prepare 250 mL of a 0.00600 M solution
ollegr [7]

Answer: The mass of sodium bromide dihydrate is 0.208 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml  = 250 ml

moles of NaBr.2H_2O = \frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{138.92g/mol}

Now put all the given values in the formula of molality, we get

0.00600=\frac{x\times 1000}{138.92\times 250}

x=0.208

Therefore, the mass of sodium bromide dihydrate is 0.208 grams

8 0
3 years ago
To what temperature must a balloon, initially at 25°C and 2.00 L, be heated in order to have a volume of 6.00 L
andreyandreev [35.5K]

Answer:

894 deg K

Explanation:

The computation is shown below:

Given that

V1 denotes the initial volume of gas = 2.00 L  

T1 denotes the initial temperature of gas = 25 + 273 = 298 K  

V2 denotes the final volume of gas  = 6.00 L  

T2 = ?

Based on the above information

Here we assume that the pressure is remain constant,

So,  

V1 ÷ T1 = V2 ÷ T2  

T2 = T1 × V2 ÷ V1

= (298)(6) ÷ (2)

= 894 deg K

6 0
3 years ago
When comparing the successive ionization energies of an element, an unusually big increase in ionization energy is seen when ___
Murljashka [212]

Answer:

The first valence electron is removed.

Explanation:

Ionization energy is the energy that is needed to tear out the last electron of an atom in its ground state or gaseous state.

A(g)  + IE ----> A+(g)    + 1e-

When we talk about starting an electron we refer to the last valence electron, since it is the one that is furthest from the atomic nucleus, the one that does not feel attracted. As the question asks us the opposite, the ionization energy is going to be extremely high, if the electron to be removed occupies the first valence layer, since it is totally attracted to the nucleus.

8 0
4 years ago
The specific heat capacity of lead is 0.13 J/g-K. How much heat (in J) is required to raise the temperature of 15 g of lead from
Alona [7]

Answer:

c. 29 J

Explanation:

Step 1: Given data

  • Specific heat capacity of Pb (c): 0.13 J/g.K (= 0.13 J/g.°C)
  • Mass of Pb (m): 15 g
  • Initial temperature: 22 °C
  • Final temperature: 37 °C

Step 2: Calculate the temperature change

ΔT = 37 °C - 22 °C = 15 °C

Step 3: Calculate the heat (Q) required to raise the temperature of the lead piece

We will use the following expression.

Q = c × m × ΔT

Q = 0.13 J/g.°C × 15 g × 15 °C = 29 J

6 0
3 years ago
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