1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Usimov [2.4K]
2 years ago
15

Need help with science pls help me

Chemistry
1 answer:
hoa [83]2 years ago
3 0

Answer:

B. negative charge only

Explanation:

The saying "opposites attract" is true in the case. Since the rod is positively charged, the sphere must have a negative charge to be attracted to it.

A sphere that is positively charged would be repelled from the rod, and a neutral sphere would not be attracted or repelled.

You might be interested in
Drag the tiles to the correct boxes. Not all tiles will be used.
NISA [10]

Answer:

1) Length - Meter

2) Mass - Pound

3) Time - Minute

<em>Please Mark This As Brainliest!</em>

8 0
2 years ago
Which of the following statements is incorrect? A. Molecular mass is expressed in atomic mass units. B. Formula mass compares th
n200080 [17]

Answer:

  • The incorrect statement is the choice <em>C. Atomic mass has units of grams per atom.</em>

Explanation:

<u>1) Choice A.</u><em><u> Molecular mass is expressed in atomic mass units</u></em><u>.</u>

Correct. Atomic mass units (a.m.u) is the standard unit used to express the mass of the atoms and the molecules.

Since, one atom, molecule, or formula unit is a tiny amount of material, it has a ver, very low mass, and the unit mass of a molecule is referred to one mole (6.022 × 10²³ units).

<u>2) Choice B. </u><em><u>Formula mass compares the mass of one formula unit of a substance to the mass of one atom of carbon-12</u></em><u>.</u>

Correct. The masses of atoms and compounds are referred to a standard. Such standard is the carbon-12 atom. This is, the cabon-12 atom was selected as the standard and its exact mass is 12 a.m.u.

<u>3)  Choice C. </u><em><u>Atomic mass has units of grams per atom.</u></em><u> </u>

Incorrect. Atomic mass is the mass of the atoms, but, since, the mass of one atom is so small, the atomic mass is referred to one mole. Hence, the atomic mass has units of grams per mole.

<u>4) Choice D. </u><em><u>Both molecular mass and formula mass use carbon-12 as a reference standard.</u></em>

Correct. As stated when explaining the option B, the mass of atoms, molecules, and formula units are referred to carbon-12 standard.

<u>5) Choice E. S</u><em><u>odium chloride, an ionic compound, is said to have a formula weight, but not a molecular weight.</u></em>

Correct. The reason is that ionic compounds form large structures (crystals) and, since there is not such thing as one molecule of them, they are said to have formula weight (or mass) but not a molecular weight.

The name molecules is reserved for covalent compounds, where you can formally identify molecules. E.g. Water is a molecular compound, and each molecule has molecular formula H₂O, whose mass is the molecular mass.

7 0
3 years ago
Not all of the water falls as rain, snow,or sleet evaporates. What happens to the rest of the water?
Bumek [7]
Hi there! All of the water returns to the atmosphere, it's called evapotranspiration and condenses. And then the water falls back to the Earth's surface and starts the cycle all over again. If you don't know what I mean, it's the Water Cycle.
4 0
3 years ago
Calculate the freezing point of a solution that contains 8.0 g of sucrose (C12H22O11) in 100 g of H2O. Kf for H2O = 1.86C/m
Aleks04 [339]

The freezing point of the sucrose solution is -0.435°C.

<h3>What is the freezing point of the solution?</h3>

The freezing point of the solution is determined from the freezing point depression formula below:

  • ΔT = mKf(H₂O)

Kf(H₂O) = 1.86 Cm

m is molality of solution = moles of solute/mass of solvent

moles of sucrose = 8.0/342.3 = 0.0233 moles

m = 0.0233/0.1 = 0.233 molal

ΔT = 0.233 m * 1.86°C/m.

ΔT = 0.435 °C.

Freezing point of sucrose solution = 0°C - 0.435°C

Freezing point of sucrose solution  = -0.435°C.

In conclusion, the freezing point of sucrose solution is determined from the freezing point depression.

Learn more about freezing point depression at: brainly.com/question/19340523

#SPJ1

8 0
2 years ago
2. Solid sodium reacts with gaseous chlorine to produce sodium chloride.
stich3 [128]
2Na (s) + Cl2 (g) = 2NaCl (s)
8 0
2 years ago
Other questions:
  • the purpose of the ____ system prevent foreign substances from entering the body and to attack foreign substances that are in th
    11·1 answer
  • A scientific model must make a testable prediction. a scientific model must make a testable prediction.
    12·1 answer
  • Can some one please help me with this organic chemistry question?
    9·1 answer
  • Which metal atom below cannot form a cation of several different charges?
    13·1 answer
  • What is the oxidation number for CO2
    13·1 answer
  • Matter is anything that has mass. What is the smallest unit of matter known as?
    6·1 answer
  • Which has a higher boiling point? please help!​
    8·1 answer
  • Which of the following rocks would probably be made up of the largest
    11·1 answer
  • A student used standard solutions of aspirin in a FeCl3-KCl-HCl mixture to plot a graph of molarity versus absorbance for dilute
    15·1 answer
  • If the rock has a mass of 250.8 grams, what is its density?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!