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densk [106]
3 years ago
6

Which scenario suggests that the results of an experiment are reliable?

Chemistry
2 answers:
antiseptic1488 [7]3 years ago
8 0
B) Repeating the experiment gives the same results should be it
BigorU [14]3 years ago
4 0
The answer is B.

Hope this helps.
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Consider the following reaction:
Katyanochek1 [597]

Answer:

The three statements are true

Explanation:

For the reaction:

I₂O₅(s) + 5CO(g) → I₂(s) + 5CO₂(g)

State oxidation of iodine in I₂O₅ is:

5 O²⁻ = 10⁻

As you have 2 I and the molecule has no charge, <em>oxidation state of I is +5</em>.

The carbon in CO has an oxidation state of +2 and in CO₂ is +4. That means <em>the carbon is oxidized</em>

<em />

An oxidizing agent is a substance that produce the oxidation of the agent that reacts with this one. CO is oxidized because of I₂O₅ is producing its oxidation being <em>the oxidizing agent</em>

<em></em>

Thus,<em> the three statements are true</em>.

3 0
3 years ago
What is the name of the people who hid the Dead Seas Scrolls. When did they live at Qumran?
Shkiper50 [21]
It was named the Qumran seas scrolls.
3 0
2 years ago
Assign each species to the expression that most accurately describes the basic units of that substance. categories: single atoms
Temka [501]
Atoms are the smallest form of the substance. examples of atoms are in elemental forms such as copper, helium, silver. Diatomic molecules are made up of identical atoms. Examples are I2.. F2 and Br2. Formula units are those compounds that are made up of two or more elements such as -No2, KMnO4,<span>C3H8, MgCl2, HgBr2, Ba(OH)2</span>
6 0
3 years ago
Read 2 more answers
Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the following equation: CO2(s)→C
GREYUIT [131]

Answer:

m=8.79kg

Explanation:

First of all we need to calculate the heat that the water in the cooler is able to release:

Q=\rho * V*Cp*\Delta T

Where:

  • Cp is the mass heat capacity of water
  • V is the volume
  • \rho is the density

Q=1 g/cm^3 *15000 cm^3*4.184 \frac{J}{g*^{\circ}C}*(10-90)^{\circ}C

Q=-5020800 J=-5020.8 kJ

To calculate the mass of CO2 that sublimes:

-Q=\Delta H_{sub}*m

Knowing that the enthalpy of sublimation for the CO2 is: \Delta H_{sub}=571 kJ/kg

5020.8 kJ=571 kJ/kg*m

m=\frac{5020.8 kJ}{571 kJ/kg}=8.79kg

6 0
2 years ago
Which of the following mixture types canNOT be filtered to remove solutes?
iVinArrow [24]
1. A) Colloids only

2. C) M<span>olecules of the dispersion medium colliding with dispered phase particles 

Hope this helps!</span>
3 0
2 years ago
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