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Mkey [24]
3 years ago
8

What is 123 lbs in kg?

Chemistry
2 answers:
yarga [219]3 years ago
6 0
1 lbs ----------- 0.453592 kg
123 lbs -------- ??

123 x 0.453592 / 1 => 55.7919 kg
Softa [21]3 years ago
4 0

Answer: 55.7919lbs

Explanation:

Hope it helps! PLEASE SELECT ME BRAINLIEST!♡

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If 0.507J of heat leads to a 0.007 degree C change in water, what mass is present?
Ivanshal [37]

Answer:

17.3 g

Explanation:

<u>Given the following data;</u>

  • Quantity of heat, Q = 0.507 J
  • Temperature = 0.007°C
  • Specific heat capacity of water = 4.2 J/g°C

Mathematically, Heat capacity is given by the formula;

Q = MCT

Where;

  • Q represents the heat capacity or quantity of heat.
  • M represents the mass of an object.
  • C represents the specific heat capacity of water.
  • T represents the temperature.

Making "M" the subject of formula, we have;

Mass, \ m = \frac {Q}{CT}

Substituting the values into the formula, we have;

Mass, \ m = \frac {0.507}{0.007*4.2}

Mass, \ m = \frac {0.507}{0.0294}

<em>Mass, m = 17.3 grams</em>

3 0
3 years ago
1.) which of these is the balanced equation for this reaction?
horsena [70]

Answer:

1.D) CH4 + 2O2 → CO2 + 2H2O

2C)2,1,2

3.D)SIO2 + 4HF → SIF4 + 2H2O

4.D)2As + 6NaOH → 2Na3AsO3 + 3H2

5.C)SiCI4 + 2H2O → SiO2 + 4HCI

Explanation:

equal number of atoms of each elements in both the sides of the chemical equation is required to have an equation in balanced state.

6 0
3 years ago
What is room temperature in kelvins
Alexeev081 [22]

Answer:

295.372

It should be right because Room Temperature is 72F

7 0
3 years ago
Read 2 more answers
Explain how scientists use geologic time to determine the age of land forms.
valentina_108 [34]
I am sorry i wish i could help you but i dont know the answer either.
5 0
3 years ago
What is the total number of joules released when a 5.00-gram sample of water changes from liquid to solid at 0°C?
Marrrta [24]
Energy released from changing the phase of a substance from the liquid phase to solid phase can be calculated by using the specific latent heat of fusion. The heat of fusion of water at 0 degrees Celsius is 334 J/g. Calculation are as follows:
<span>
Energy = 5 grams x 334 J/g
</span><span>Energy = 1670 J</span>
4 0
3 years ago
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