Answer:
he scientific method has five basic steps, plus one feedback step:
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
Explanation:
I think A.
Answer:
Ionic solids
Explanation: Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions. They're characterized by very high melting points and brittleness and are poor conductors in the solid state. An example of an ionic solid is table salt, NaCl.
Answer:
5.46x
Explanation:
just move the decimal however many places to the left until there is only one digit to the left of it and then square the ten by that number
Answer:
The answer to your question is below
Explanation:
Data
mass of Gold = 35.12 g
mass number of gold = 197 g (from the periodic table)
1.- To calculate the number of moles use proportions
197 g of gold ----------- 1 mol
35.12 g of gold -------- x
x = (35.12 x 1)/197
<u>x = 0.18 moles of gold</u>
2.- To calculate the number of atoms also use proportions and the Avogadro's number.
1 mol of gold ------------ 6.023 x 10 ²³ atoms
0.18 moles of gold ----- x
x = (0.18 x 6.023 x 10²³) / 1
<u> x = 1.084 x 10²³ atoms</u>
