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2 years ago

How many sig figs in each? -27.43 -1.90 -101

Chemistry

1 answer:

GarryVolchara [31]2 years ago

5 0

1. Has 4 sig figs, all non zeros are significant
2. 3 sig figs trailing zero after a decimal
3. 3 sig figs

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A person walking covers 5.20 m in 10.4 s. How fast is the person moving?

salantis [7]

Answer:

Explanation:

Velocity = distance over time

where distance = 5.20 m

time = 10.4 s.

velocity = <u> 5.20 m </u>

10.4 s.

= 0.50 m/s

8 0

2 years ago

A mountain climber at the peak of a mountain has _____<br> energy.

hodyreva [135]

Answer:

Potential energy

Explanation:

A mountain climber at the peak of a mountain has potential energy.

The potential energy of a body is stored energy in a body. It is function of mass and position of the body.

Mathematically;

P.E = mgh

m is the mass

g is the acceleration due to gravity

h is the height

7 0

2 years ago

Please help me! Please explain!

Ksju [112]

Answer: Total number of Protons PLUS Neutrons

Explanation:

Hopes that helps

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2 years ago

"Which statement is true about the removal of a terminal phosphate" from ATP? Choose one: A. The reaction is associated with a p

Mamont248 [21]

Answer:

C. The reaction is energetically favorable.

Explanation:

The reaction which shows the removal of the terminal phosphate from the ATP is shown below:

$ATP+H_2O\rightarrow ADP+P_i+\ energy$

The Gibbs' free energy change of this reaction, $\Delta G^0=-7.3\ kcal/mol$

Hence, Option A is not correct.

It is a type of hydrolysis reaction in which water is being added to the molecule.

Hence, Option B is not correct.

The Gibbs' free energy change is negative which means that the reaction is energetically favorable.

Option C is correct.

6 0

3 years ago

Plumbers, welders, or glass blowers often use the gas acetylene (C2H2) because it burns in oxygen with a very hot flame. The pro

solmaris [256]

Answer:

Unbalanced equation: $C_{2}H_{2}(g)+O_{2}(g)\rightarrow CO_{2}(g)+H_{2}O(g)$

Explanation:

Acetylene reacts with oxygen to produce carbon dioxide and water vapor.
Here reactants are acetylene and oxygen. Here products are carbon dioxide and water vapor.
We know that physical state of water vapor is gas. Therefore each and every reactants and products are gaseous.
States of the species in unbalanced equation is represented inside parentheses with an abbreviation "g" for gaseous state.
Unbalanced equation: $C_{2}H_{2}(g)+O_{2}(g)\rightarrow CO_{2}(g)+H_{2}O(g)$

5 0

3 years ago