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
eimsori [14]
3 years ago
13

In order to have a positive charge, an atom must have ________. In order to have a positive charge, an atom must have ________.

A. more electrons than protons B. more protons than neutrons C. more neutrons than protons D.more protons than electrons
Chemistry
1 answer:
son4ous [18]3 years ago
6 0

Answer:

C

Explanation:

The charge on an atom depends on the number of protons and electrons present in it. The protons in an atom are positively charged while electrons have a negative charge. For a neutral atom, the number of protons balances the number of electrons. for a negatively charged atom, the number of electrons is more than the number of protons. for a positively charged atom , the number of protons are more than the number of electrons.

You might be interested in
How many moles of calcium are there in 5.74 x 1022 atoms of calcium?
igor_vitrenko [27]

Answer:

0.095 moles of Calcium is there in 5.74 x 1022 atoms of calcium.

Explanation:

  • As we know, 6.023*10^23 atoms of an element is equal to its atomic weight.

       And, 6.023*10^23 atoms of an element is also equal to 1 mole of the             element.

We have,

  • 6.023*10^23 atoms of element calcium equals to 1 mole of Calcium
  • 5.74*10^22 atoms of element calcium equals to

         (1/(6.023*10^.23)) * 5.74*10^22 moles of calcium

Therefore,

  • 5.74 x 1022 atoms of calcium= 0.095 moles of calcium.

6 0
3 years ago
This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generati
tia_tia [17]

Answer: 10.2 grams

Explanation:

The balanced chemical reaction is :

CaH_2(s)+2H_2O(l)\rightarrow Ca(OH)_2(aq)+2H_2(g)

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 740 torr =  0.97 atm    (760torr=1atm)

V= Volume of the gas = 12.0 L

T= Temperature of the gas = 19°C = 292 K    0^0C=273K

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

n=\frac{PV}{RT}=\frac{0.97\times 12.0}{0.0821\times 292}

n=0.48

According to stoichiometry:

2 moles of hydrogen are generated by = 1 mole of CaH_2

Thus 0.48 moles of hydrogen are generated by =\frac{1}{2}\times 0.48=0.24 moles of CaH_2

Mass of  CaH_2=moles\times {\text {Molar mass}}=0.24mol\times 42g/mol=10.2g

Thus 10.2 grams of CaH_2 are needed to generate 12.0 L of hydrogen gas if the pressure of hydrogen is 740. torr at 19°C

5 0
3 years ago
Why do we need a “mole”?
Ivan
Wdym mole like the animal or something else ?
4 0
2 years ago
Read 2 more answers
Which of the following is a compound machine?
il63 [147K]
Compound= many parts together therefore bike is the answer
6 0
3 years ago
Read 2 more answers
Which statement applies to electronegativity?
EastWind [94]
I believe the answer would be A. Electronegativity increases across a period.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the heat of decomposition for this process at constant pressure and 25°C: CaCO3(s) → CaO(s) + CO2(g) The standard enth
    5·1 answer
  • What do you think a chemical change is?
    11·1 answer
  • When did ernest rutherford contribute to the atomic theory?
    10·1 answer
  • Solid cesium iodide has the same kind of crystal structure as CsCl which is pictured below: If the edge length of the unit cell
    12·1 answer
  • Quick little question :)
    14·1 answer
  • Pls help I’m about to cry I cant do this it’s due in ten min
    11·1 answer
  • How many elements are artificially made?
    11·2 answers
  • Which of the following does not represent an aspect of an environmentally<br> sustainable society?
    7·2 answers
  • What is the mass of sodium (Na) in 50 grams of table salt (NaCl)? Show<br> your work.
    11·1 answer
  • Which of the following is an example of matter?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!