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
trapecia [35]
3 years ago
6

________ is the force that keeps planets in orbit around the sun

Chemistry
2 answers:
Sphinxa [80]3 years ago
7 0
Answer: Gravity
gravity pulls down anything that is not held up by some other force
SpyIntel [72]3 years ago
6 0

Answer:

   GrAvItY

Explanation:

You might be interested in
What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should
horsena [70]

Answer:

i

J_{m} = 20

ii

J_{m} = 22.5

Explanation:

From the question we are told that

  The first temperatures is T_1 =  25^oC =  25 +273 =298 \ K

   The second temperature is  T_2 =  100^oC =  100 +273 = 373 \ K

Generally the equation for  the most highly populated rotational energy level is mathematically represented as

     J_{m} = [ \frac{RT}{2B}]  ^{\frac{1}{2} } - \frac{1}{2}

Here R is the gas constant with value R =8.314 \ J\cdot K^{-1} \cdot mol^{-1}

Also  

      B is given as B=\ 0.244 \ cm^{-1}

   Generally the energy require per mole to move 1 cm is  12 J /mole

So   0.244 \ cm^{-1}  will require x J/mole

           x =  0.244 *  12

=>          x =  2.928 \ J/mol

So at the first temperature

     J_{m} = [ \frac{8.314 * 298  }{2*  2.928 }]  ^{\frac{1}{2} } - 0.5

=>  J_{m} = 20

So at the second temperature

           J_{m} = [ \frac{8.314 * 373  }{2*  2.928 }]  ^{\frac{1}{2} } - 0.5

=>  J_{m} = 22.5

3 0
3 years ago
PLEASE HELP WILL AMRK BRAINLIEST<br> what is the atomic mass of Na3PO4?
Ira Lisetskai [31]

Answer:

163.94

Explanation:

Na = 22.99 (3)

P = 30.97

O = 16.00 (4)

22.99(3) + 30.97 +16.00(4) = 163.94

Hope that helps

4 0
2 years ago
Read 2 more answers
The enthalpy change for the reaction of titanium metal with gaseous iodine is given by the following thermochemical equation: 2
julia-pushkina [17]

Answer : The enthalpy change for the reaction is, 419.5 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

The given chemical reaction is,

2Ti(s)+3I_2(g)\rightarrow 2TiI_3(s)    \Delta H=-839kJ

Now we have to determine the enthalpy change for the reaction below:

TiI_3(s)\rightarrow Ti(s)+\frac{3}{2}I_2(g)    \Delta H'=?

By reversing and then dividing the reaction by 2, we get the enthalpy change for the reaction.

The expression will be:

\Delta H'=-\frac{(\Delta H)}{2}

\Delta H'=-\frac{(-839kJ)}{2}

\Delta H'=419.5kJ

Therefore, the enthalpy change for the reaction is, 419.5 kJ

3 0
3 years ago
If a dog has a mass of 21.5kg, what is his mass in the following units?
PolarNik [594]

Answer: 21.5kg in grams is 21,500 grams

21.5kg in mg is 215,000,00

Explanation:

5 0
3 years ago
A field worker is exposed to a xylene for a duration of 8 weeks at 40 hrs/wk. The concentration of xylene in the workplace is 40
Andrej [43]

Answer:

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

Explanation:

Number of hours worker exposed to xylene = 40 hr/week\times 8 week = 320 hours

The concentration of xylene in the workplace =40 \mu g/m^3

The worker is inhaling air at a rate of 0.9 m^3/hr.

Amount xylene inhaled by worker in an hour :

= 40\mu g/m^3\times 0.9 m^3/hr=36 \mu g/hr

Amount xylene inhaled by worker in 320 hours:

36 \mu g/hr\times 320 hr=11,520 \mu g=11,520\times 0.001 mg=11.520 mg

1 μg = 0.001 mg

Amount xylene inhaled by worker in 320 hours = 11.520 mg

1 day = 24 hours

Amount xylene inhaled by worker in 1 day:

\frac{24}{320}\times 11.520 mg=0.864 mg

Assuming 70 kg body mass, the chronic daily intake of xylene :

\frac{0.864 mg/day}{70 kg}=0.01234 mg/ kg day\approx 0.012 mg/ kg day

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

5 0
3 years ago
Other questions:
  • Two chemicals switch places is called
    5·2 answers
  • I need help with this problem.
    13·1 answer
  • A model to show where water flows during a storm?
    11·1 answer
  • Cells must be __________________ by other cells??
    15·1 answer
  • What is the solvent in a sports drink that contains water, high fructose corn syrup, sodium chloride, and food coloring?
    8·1 answer
  • Calculate the molarity of a solution containing 2.66 moles of KOH in 750 mL of solution?
    11·1 answer
  • Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
    14·1 answer
  • During a reaction with solids generally the _______ the size of each piece, the larger the total surface area. This means ______
    6·1 answer
  • The bacteria are known to be prokaryotes. Prokaryote means
    13·1 answer
  • (1.) If at 100.0 mL solution contains 0.850 moles of a solute, what is the molarity ?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!