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umka2103 [35]
3 years ago
15

Tornadoes can negatively affect an ecosystem when

Chemistry
2 answers:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

b, their strong winds uproot many of the important plants

Explanation:

jeyben [28]3 years ago
4 0
Strong winds can uproot plants
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A 44.0 g sample of an unknown metal at 99.0 oC was placed in a constant-pressure calorimeter of negligible heat capacity contain
tatiyna

Answer:

C_m=0.474\frac{J}{g\°C}

Explanation:

Hello.

In this case, since this is a system in which the water is heated up and the metal is cooled down in a calorimeter which is not affected by the heat lose-gain process, we can infer that the heat lost by the metal is gained be water, it means that we can write:

Q_m=-Q_w

Thus, in terms of masses, specific heats and temperatures we can write:

m_mC_m(T_{eq}-T_m)=-m_wC_w(T_{eq}-T_w)

Whereas the equilibrium temperature is the given final temperature of 28.4 °C and we can compute the specific heat of the metal as shown below:

C_m=\frac{-m_wC_w(T_{eq}-T_w)}{m_m(T_{eq}-T_m)}

Plugging the values in and since the density of water is 1.00 g/mL so the mass is 80.0g, we obtain:

C_m=\frac{-80.0g*4.184\frac{J}{g\°C} (28.4\°C-24.0\°C)}{44.0g(28.4\°C-99.0\°C)}\\\\C_m=0.474\frac{J}{g\°C}

Best regards!

6 0
3 years ago
Which of the following statements best predicts the pH value of H2CO3 and KOH?
worty [1.4K]

Answer:

The 2nd one

Explanation:

ITS THE RIGHT ANSWER

4 0
4 years ago
Which is the most likely to be reduced?
tigry1 [53]

Answer:

Fe3+

Explanation:

6 0
3 years ago
Read 2 more answers
A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled’s potential energy? (Formula: P
olga_2 [115]

Explanation:

Gravitational potential energy

= mgh = (45kg)(9.81N/kg)(2m) = 882J.

4 0
3 years ago
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The question below ......... in picture
Ivanshal [37]

Answer:

10.49

Explanation:

3MgO + 2Fe — Fe2O3 + 3Mg

n(Fe2O3) = m/M

=15/159.69

=0.9393199324mol

1 Mol of Fe2O3 = 2 moles of Fe

Therefore n(Fe) =2 * 0.9393199324

=0.1878639865mol

m(Fe) = n*m.m

= 0.1878639865 * 55.8

=10.4828g

6 0
3 years ago
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