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umka21 [38]
3 years ago
11

Which statement explains why catalysts are important for living

Chemistry
1 answer:
Marina86 [1]3 years ago
8 0

Answer:

Catalysts allow chemical reactions to occur at temperatures at which the organism lives.

Explanation:

Catalysts are molecules that speeden the rate of chemical reaction by lowering the activation energy of the reaction. In a living system, the catalyst are ENZYMES, which help to hasten up many biochemical reactions.

Another function of catalyst in living systems is that it allows chemical reactions to occur at temperatures at which the organism lives.

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If an atom has 5 protons and 6 neutrons how many electrons does it have? What would the mass of this atom be?
zysi [14]

Answer:

<em>Mass number = protons + neutron</em>

<em />

<em>The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons). </em>

<em> </em>

<em>In this case the mass number would be 11</em>

HOPE THIS HELPS!!!

6 0
3 years ago
Describe what happens when two substances at different temperatures come into contact. Describe how the law of conservation of e
Mrac [35]
When two substances at different tempeartures como into contact, the substance that is at higher temperature will transfer energy, in the form of heat, to the substance that is at lower temperature, until their temperatures get equal.

In this case, if the two substances are isolated of the rest of the universe, the law of conservation of energy states tha the heat released by the substance initially at higher temperature is the same amount of heat gained by the substance originally at lower temperature.

 
3 0
4 years ago
A toaster has a resistance of 28 Ω and is plugged into a 110 V circuit. Using the GRASS method, what current is measured?
BARSIC [14]

Answer:

The current of the toaster is 3.93A

Explanation:

Using the GRASS method:

G: Given: The information that is given is that we have 28Ω of Resistance and 110V of voltage.

R: Required: We need to find the current measured.

A: Action: We can use Ohm's law that relates resistance, voltage and current in the equation:

V = R*I

Or:

I = V/R

<em>Where I is current in A, V is voltage = 110V and R is resistance = 28Ω</em>

S: Solve:

I = 110V / 28Ω

I = 3.93A

S: Statement:

<h3>The current of the toaster is 3.93A</h3>
4 0
3 years ago
The mass of the sedimentary rock is equal to the mass of what
Finger [1]
It would have 018 mass balance calculation and the total of the sedimentary rock mass would like 0.76
8 0
3 years ago
If the lead concentration in water is 1 ppm, then we should be able to recover 1 mg of lead from _____ L of water.
Aliun [14]

Answer:

1 L

Explanation:

ppm means parts per million. Generally the relationship between mass and litre is given as;

1 ppm = 1 mg/L

This means that 1 ppm is equivalent to 1 mg of a substance dissolved in 1 L of water.

3 0
4 years ago
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