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
slega [8]
3 years ago
12

Help please hello please

Chemistry
2 answers:
irinina [24]3 years ago
8 0
Answer: Hunter and gathers are mostly people who work in factories

I had this answer on a question before and this was my answer I did and it was right so I hope it was right and you did good!
lord [1]3 years ago
5 0

Answer:

the

first one

Explanation:

You might be interested in
Draw the atomic structure with electronic configuration of Potassium​
DedPeter [7]

Answer:

Explanation:

i try to help you

4 0
3 years ago
Read 2 more answers
Nick needs 3.5 moles of sodium fluoride (NaF) for a solution he is mixing in the lab. How many grams of NaF does Nick need to me
Minchanka [31]

Answer:

147 g

Explanation:

<em>The number of moles of a substance is the ratio of the mass of the substance and the molar mass of that substance.</em> Mathematically,

  mole = mass of substance/molar mass

In this case, Nick needs 3.5 moles of NaF, the molar mass of NaF is calculated as:

  23 + 19 = 42 g/mol (Note: Na = 23, F = 19)

Hence,

mass of 3.5 mole NaF = mole x molar mass

                              = 3.5 x 42 = 147 g.

<em>Hence, Nick would need to measure out </em><em>147 g</em><em> NaF using a suitable weighing balance.</em>

5 0
3 years ago
Las sustancias ionicas y los metale sson electricamente neutros. ¿como es esto posible si estan formados por iones, que posen ca
Anton [14]

Answer:

ver explicacion

Explanation:

Los iones se forman cuando las especies químicas pierden o ganan electrones.

Las sustancias iónicas consisten en un ión positivo y negativo cuyas cargas se equilibran exactamente entre sí, por lo que el compuesto iónico es neutro.

Los átomos de metal se mantienen unidos por el enlace metálico. Esto implica la interacción entre iones metálicos cargados positivamente y un mar de electrones negativos. Las cargas positivas de los iones metálicos están exactamente equilibradas por el mar de electrones cargados negativamente, por lo que el metal es neutro.

8 0
3 years ago
Classify the following statements as observation, inference, prediction, measuring or classifying
Nadusha1986 [10]

Answer:

ggghy I am a great and the other hand the wildcats their own is the name of the

8 0
3 years ago
What is the mass of 8.12 × 10^23 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)
amid [387]

Answer:

m=59.3gCO_2

Explanation:

Hello,

In this case, the first step is to compute the molar mass of carbon dioxide as shown below, considering it has one carbon atom and two oxygen atoms:

M=12.011g/mol+2*15.999g/mol\\\\M=44.009g/mol

It is important to notice it is the mass in one mole of such compound. Afterwards, we need to use the Avogadro's number to compute the how many moles are in the given molecules of carbon dioxide as shown below:

mol=8.12x10^{23}molec*\frac{1mol}{6.022x10^{23}molec} =1.35mol

Finally, the mass by using the molar mass:

m=1.35mol*\frac{44.009g}{1mol} \\\\m=59.3gCO_2

Best regards.

4 0
3 years ago
Other questions:
  • What represents the different forms of electromagnetic radiation
    6·1 answer
  • A chemist adds of a M copper(II) fluoride solution to a reaction flask. Calculate the mass in micrograms of copper(II) fluoride
    6·1 answer
  • Word equation for Cu(s)+O2(g)=CuO(s)
    15·2 answers
  • Which correctly defines a basic solution?
    11·2 answers
  • A fluorine ion has nine protons and a charge of -1. how many electrons are in an ion the fluorine. A. 1 B. 9 C. 10 D. 8
    7·2 answers
  • Please explain the difference between reactants and products in a chemical reaction.
    11·1 answer
  • PLEASE HELP!!!
    13·1 answer
  • What is one benefit that nuclear power plants currently provide for our environment?
    9·2 answers
  • find the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10 of the earth pull sho
    11·1 answer
  • 5. How many moles of tin (II) fluoride are there in 908 g?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!