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Oduvanchick [21]
3 years ago
12

I need help can you help

Chemistry
1 answer:
telo118 [61]3 years ago
8 0
I can sure try to help!
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A 50.00-g sample of metal at 78.0°C is dropped into cold water. If the metal sample cools to 17.0°C and the specific heat of met
Luba_88 [7]

Answer:−329.4 calorie

Explanation:Heat released by metal = q=m_mc_m(T_2-T1)q=m

m

​

c

m

​

(T

2

​

−T1)

m_m=50\ g\\c_m=0.108\ cal\ g^{-1}\ \degree C^{-1}\\q=50\times0.108(17-78)=-329.4\ caloriem

m

​

=50 g

c

m

​

=0.108 cal g

−1

 °C

−1

q=50×0.108(17−78)=−329.4 calorie

Here minus sign indicate that heat is released

5 0
4 years ago
Read 2 more answers
A 100g of sample of a compound is combusted in excess oxygen and the products are 2.492g of CO2 and 0.6495 of H2O. Determine the
ruslelena [56]

The empirical formula : C₁₁O₁₄O₃

<h3>Further explanation</h3>

The assumption of the compound consists of C, H, and O

mass of C in CO₂ =

\tt \dfrac{12}{44}\times 2.492=0.680~g

mass of H in H₂O =

\tt \dfrac{2.1}{18}\times 0.6495=0.072~g

mass of O :

mass sample-(mass C + mass H)

\tt 1-(0.68+0.072)=0.248`g

mol of  C :

\tt \dfrac{0.68}{12}=0.056

mol of H :

\tt \dfrac{0.072}{1}=0.072

mol of O :

\tt \dfrac{0.248}{16}=0.0155

divide by 0.0155(the lowest ratio)

C : H : O ⇒

\tt \dfrac{0.056}{0.0155}\div \dfrac{0.072}{0.0155}\div \dfrac{0.0155}{0.0155}=3.6\div 4.6\div  1\\\\\dfrac{11}{3}\div \dfrac{14}{3}\div \dfrac{3}{3}=11:14:3

3 0
3 years ago
PLZ HELP According to the atomic model Which particles are found In the same part of the atom
galben [10]
Protons and neutrons
3 0
3 years ago
Read 2 more answers
Based on the information in the weather map, which direction will the wind move? A) east to west B) west to east C) north to sou
Fofino [41]

Hello. You forgot to replace the map needed to answer that question. The map is attached below:

Answer:

B) west to east

Explanation:

The letter H on the map represents an area with high air pressure, while the letter L represents an area with low air pressure. As in the areas of lower temperature or colder the pressure is greater, the wind leaves these areas and goes towards those of higher temperature, which present less pressure. For this reason, we can say that the wind is moving from west to east.

The greater the pressure difference between the regions, the greater the wind speed, and in these situations, strong winds or winds can occur, which are given different names, depending on the location: hurricane (Caribbean), tornado (USA), typhoon (Asia).

8 0
4 years ago
What's the molar mass of Calcium Chloride?
Stels [109]

Hey there!

Molar mass of CaCl₂:

Add the molar masses of each element multiplied by the amount of that element we have.

Ca: 1 x 40.078

Cl: 2 x 35.453

---------------------

           110.98 grams

The molar mass of calcium chloride is 110.98 grams.

Hope this helps!

5 0
3 years ago
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