"how much 10% acid solution should be mixed with a 25% acid solution to create 100ml of a 16% acid solution"

How do you know if your hypothesis is supported by your results or not?

vivado [14]

Answer:

Your hypothesis is an educated guess of what the end results of an experiment will be, using what you already know about your experiment you are going to conduct. So when you receive your final results, if your hypothesis is correct, or even somewhat correct then you know that it is supported by your results. For example, if I were to conduct the Coca-Cola and Mentos experiment, I could make a hypothesis that the Coca-Cola will have a bigger eruption when I add more than one Mento to the bottle due to a higher amount of a chemical with the addition of each mento. When I receive my results that the eruption was bigger each time, I know that my results supported my hypothesis.

Explanation:

-Hope this helped

5 0

1 year ago

How many kJ of heat do you need to raise the temperature of 200 g of Aluminum from 80 °C to 100 °C?

marta [7]

Answer:

0.01

Explanation:

100 -80=20

200/20=10/1000=0.01kj

7 0

2 years ago

Determine the mass of 1 mol of gold (Au), of aluminum chloride (AlCl3), and of glucose (C6H12O6)

sleet_krkn [62]

Answer: Mass of 1 mol of gold (Au) is 197g , of aluminum chloride $(AlCl_3)$ is 133.5 g and of glucose $(C_6H_{12}O_6)$ is 180 g

Explanation: Mass of 1 mole of a substance is called its molar mass.

a) 1 mole of $Au$ contains $6.023\times 10^{23}atoms$ and weigh 197g.

b) 1 mole of $AlCl_3$ will weigh= $1\times {\text {mass of 1 mole of Aluminium}}+3\times {\text {mass of 1 mole of chlorine atom}}$

Thus mass of 1 mole of $AlCl_3$ will be $=1moles\times {27g/mol}+3moles\times {35.5g/mol}=133.5g$

c) 1 mole of $C_6H_{12}O_6$ will weigh= $6\times {\text {mass of 1 mole of carbon}}+12\times {\text {mass of 1 mole of hydrogen atom}}+6\times {\text {mass of 1 mole of oxygen}}$

1 mole of $C_6H_{12}O_6$ will weigh= $6\times 12g/mol+12\times 1g/mol+6\times 16g/mol=180g$

5 0

4 years ago

Radium is: more powerful than uranium less powerful than uranium identical to an alpha particle not a radioactive element

Anuta_ua [19.1K]

Radium is a radioactive element, according to the periodic table of elements, Radium IS more radioactive than uranium.

6 0

3 years ago

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What mass of sodium oxalate na2c2o4 is needed to prepare 0.250 l of a 0.100 m solution?

Lena [83]

Molarity = number of moles of solute / liters of solution
number of moles = molarity * liters of solution
number of moles of Na2C2O4 = 0.1 * 0.25 = 0.025 moles

Now, from the periodic table:
mass of Na = 22.9 grams
mass of C = 12 grams
mass of O = 16 grams
molar mass of Na2C2O4 = 2(22.9) + 2(12) + 4(16) = 133.8 grams
Therefore, one mole is equal to 133.8 grams. To know the mass of 0.025 moles, all you have to do is cross multiplication as follows:
mass = (0.025*133.8) / 1 = 3.345 grams

7 0

3 years ago

Read 2 more answers