An unknown element is determined to have 22 neutrons and a mass number of 40.

What is the product of photosynthesis that plants make as a source of energy for their life functions? What role does this subst

kaheart [24]

Glucose. Also provides heat and energy in man

4 0

1 year ago

Statements

allochka39001 [22]

1. Make an observation : My toaster doesn't toast my bread

2. Ask a question : Why doesn't my toaster work?

3. Form a hypothesis : My coffeemaker works when plugged into the outlet

4. Make a prediction : If something is wrong with the outlet, then my coffeemaker also won't work when plugged into it

5. Conduct an experiment : I plug my coffeemaker into the outlet

6. Analyze the results : There is something wrong with the electrical outlet

Explanation:

The solution to the problem is as shown above.

A scientific method follow a methodical way of critically carrying out an inquiry into an observation.
Firstly, an observation is usually made with our senses. Here the researcher observes that the toaster does not toast his bread probably after a long wait.
He then proceeds to ask why the toaster does not work.
To investigate this, the forms a hypothesis. A hypothesis is a scientific guess. It is a tentative proposition about an investigation.
The researcher then makes a prediction about the outlet that might be faulty.
With this background, he goes on to carry out an experiment to substantiate his findings. This is seen when he plugs the coffeemaker into the outlet.
From the analysis of result, he sees that that something is wrong with the outlet.

Learn more:

purpose of experiment brainly.com/question/5096428

#learnwithBrainly

7 0

2 years ago

The specific heat of palladium is 0.239 J/g°C. How much heat (q) is released when a 10.0 g piece of platinum cools from 100.0°C

Andrej [43]

Answer:

119.5 J

Explanation:

First we calculate the temperature difference:

ΔT = 100 °C - 50 °C = 50 °C

Then we can calculate the heat released by using the following formula:

q = Cp * ΔT * m

Where q is the heat, Cp is the specific heat, ΔT is the temperature difference and m is the mass.

We input the data:

q = 0.239 J/g°C * 50 °C * 10.0 g

q = 119.5 J

7 0

3 years ago

Isotopes of an element have the same number of protons but a different number of d.neutrons.

horsena [70]

Yes this is correct. Change the number of protons and you have a different element

7 0

3 years ago

2N2 + O2 -------> 2 N2O

notka56 [123]

Answer:

Explanation:

Given data:

Mass of N₂ = 48.7 g

Moles of N₂ = ?

Molecules of N₂ = ?

Mass of N₂O = ?

Moles of N₂O = ?

Atoms of N₂O = ?

Solution:

Chemical equation:

2N₂ + O₂ → 2N₂O

Number of moles of N₂:

Number of moles = mass/ molar mass

Number of moles = 48.7 g / 28 g/mol

Number of moles = 1.74 mol

Number of molecules of N₂:

1 mole = 6.022 × 10²³ molecules

1.74 mol× 6.022 × 10²³ molecules/1 mol

10.5 × 10²³ molecules

Now we will compare the moles of N₂ with N₂O from balance chemical equation:

N₂ : N₂O

2 : 2

1.74 : 1.74

Moles of N₂O:

1.74 mol

Mass of N₂O:

Mass = number of moles × molar mass

Mass = 1.74 mol × 44 g/mol

Mass = 76.56 g

8 0

3 years ago