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Pavel [41]
3 years ago
8

Extreme temperature changes or increased moisture speed up the weathering rate.

Chemistry
2 answers:
KatRina [158]3 years ago
7 0

Answer:T

Explanation:

zlopas [31]3 years ago
6 0

it is true, both of increase weathering

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Multiple Choice
Sunny_sXe [5.5K]

Answer:

A is the answer

jsksjsmmsnamsmsndndnen

7 0
3 years ago
The definition of a limiting reactant can be summarized as:
Svetlanka [38]

Answer:

Explanation:

A limiting reactant in a chemical reaction is one which puts limits on amount of product  produced out of the reaction. The process of chemical reaction is stopped when the limiting reactant is fully used up.

Example:

Suppose you have

5 gram of oxygen and 10 gram of hydrogen to make any chemical product say y

since

amount of oxygen is only 5 gram thus, when all of 5 gram of oxygen will be used up then no further reaction will take place even though amount of hydrogen is present to react.

Thus, we can say that

oxygen is limiting the production of product y.

oxygen is fully used until the reaction stops.

Thus, in this case oxygen is limiting reactant.

Based on above discussion

the correct option for this problem is

a the reactant that is used up

4 0
3 years ago
A 74.0-gram piece of metal at 94.0 °C is placed in 120.0 g of water in a calorimeter at 26.5 °C. The final temperature in the ca
disa [49]

Answer:

Explanation:

Heat lost by metal = mass x specific heat x fall in temperature

= 74 x S x ( 94 - 32 )

= 4588 S

heat gained by water = mass x specific heat x rise in temperature

= 120 x 1 x ( 32 - 26.5 )   ( specific heat of water is 1 cals / gm )

= 660

Heat lost = heat gained

4588S = 660

S = .14 cal /gm .

Specific heat of metal = .14 cal  / gm

7 0
3 years ago
An unlit match contains approximately 1,000 J of chemical energy When it burns, the match releases
ololo11 [35]

Answer:

350 J

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed but can only be converted from one form to another. This means that in a system, energy is not lost.

In this question, an unlit match contains approximately 1,000 J of chemical energy. When lit, thermal and light energy are emitted i.e. it gets converted to light and heat energy. If the thermal energy emitted was measured to be 400J, and the remaining match still contains 250J of chemical energy, then:

The amount of light energy emitted will be:

Total chemical energy (1000J) - {Remaining chemical energy (250J) + emitted thermal energy (400J)}

= 1000 - (400 + 250)

= 1000 - 650

= 350

Hence, the amount of light energy emitted is 350J

Note that, the amount of energy converted (thermal and light) and remaining chemical energy still equates the total chemical energy in the match.

5 0
4 years ago
A jogger runs a mile in 8.92 minutes. 1 mi=1609m; calculate her speed in km/hr
olchik [2.2K]

Answer:

Speed = 3.30 \frac{km}{hr}

Explanation:

Given

Distance = 1 mile

Time = 8.92 minutes

Required

Calculate Speed in km/hr

Speed is calculated as thus;

Speed = \frac{Distance}{Time}

Substitute 1 mile for distance and 8.92 minutes for time

Speed = \frac{1\ mile}{8.92\ minutes}

Convert Miles to Kilometres

If

1\ mile = 1609\ m;

Then

1\ mile = \frac{1609\ km}{1000}

1\ mile = 1.609\ km --- (1)

Convert minutes to hour

1\ minutes = 0.0167\ hour

Multiply both sides by 8.92

8.92 * 1\ minutes = 0.0167\ hour * 8.92

8.92 \ minutes = 0.148964\ hour ---- (2)

By substituting (1) and (2) in Speed = \frac{1\ mile}{8.92\ minutes}, we have

Speed = \frac{1.609\ km}{0.48694\ hour}

Speed = 3.304309 \frac{km}{hr}

Speed = 3.30 \frac{km}{hr} -- Approximated

6 0
4 years ago
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