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postnew [5]
3 years ago
15

Before raw data can be used as scientific evidence, it must be analyzed and summarized. One way of summarizing data is to find t

he mean, or average, of a set of data points. What method is used for calculating the mean?
Chemistry
1 answer:
Nikitich [7]3 years ago
6 0
The mean is simply the arithmetic average of all your raw data. This can be solved methodically by summing up all of the raw data points that you have. Take note how many raw data points you used, because this will be used to divide the sum. You will obtain the mean.
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How does dalton's atomic theory account for the law of mass conservation?
Alenkinab [10]
Answer:

Dalton's atomic theory consisted of several postulates.

Explanation: <span><span> All matter consists of indivisible particles called atoms. </span><span> Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. </span><span> Atoms cannot be created or destroyed. </span><span> Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms. </span><span> Atoms of same element can combine in more than one ratio to form two or more compounds. </span><span> Atoms are the smallest unit of matter that can take part in a chemical reaction. </span></span>
5 0
4 years ago
What volume (ml) of fluorine gas is required to react with 1. 28 g of calcium bromide to form calcium fluoride and bromine gas a
Alexandra [31]

144 mL of fluorine gas is required to react with 1.28 g of calcium bromide to form calcium fluoride and bromine gas at STP.

<h3>What is Ideal Gas Law ? </h3>

The ideal gas law states that the pressure of gas is directly proportional to the volume and temperature of the gas.

PV = nRT

where,

P = Presure

V = Volume in liters

n = number of moles of gas

R = Ideal gas constant

T = temperature in Kelvin

Here,

P = 1 atm  [At STP]

R = 0.0821 atm.L/mol.K

T = 273 K  [At STP]

Now first find the number of moles

F₂  +  CaBr₂  →  CaF₂  +  Br₂

Here 1 mole of F₂ reacts with 1 mole of CaBr₂.

So,  199.89 g CaBr₂ reacts with  = 1 mole of F₂

1.28 g of CaBr₂ will react with = n mole of F₂

n = \frac{1.28\g \times 1\ \text{mole}}{199.89\ g}

n = 0.0064 mole

Now put the value in above equation we get

PV = nRT

1 atm × V = 0.0064 × 0.0821 atm.L/mol.K × 273 K

V = 0.1434 L

V ≈ 144 mL

Thus from the above conclusion we can say that 144 mL of fluorine gas is required to react with 1.28 g of calcium bromide to form calcium fluoride and bromine gas at STP.

Learn more about the Ideal Gas here: brainly.com/question/20348074

#SPJ4

4 0
2 years ago
What is thr total of all the forces on an object .
Katen [24]
Is the combination of all forces acting on an object
6 0
4 years ago
Considering radiation weighting factors only, how many times more dangerous are alpha particles than protons?
alina1380 [7]

Answer:

C. 10

Explanation:

So wr for protons is 2 and wr for alpha particles is 20. In these terms, alpha particles cause ten times more damage then protons.

6 0
3 years ago
Read 2 more answers
What are the benefits and drawbacks to having a pouring temperature that is much higher than the metal’s melting temperature?
Mashcka [7]

Answer:

The main advantage would be that with the pouring temperature being much higher, there is very little chance that the metal will solidify in the mould while busy pouring. This will allow for moulds that are quite intricate to still be fully filled. The drawbacks, though, include an increased chance defects forming which relates to shrinkage (cold shots, shrinkage pores, etc). Another drawback includes entrained air being present, due to the viscosity of the metal being low because of the high pouring temperature.

3 0
3 years ago
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