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3 years ago

Which stage in a frog's life cycle is most similar to a plant seed?

Chemistry

2 answers:

Rom4ik [11]3 years ago

6 0

A egg because it’s the earliest stage and still had much growth to come to it if properly taken care of

-Dominant- [34]3 years ago

5 0

I would say B but yea hopefully it’s right I’m pretty sure it is though

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When OH- and H+ ions are brought together, they quickly combine to form water molecules.

Anna35 [415]

True.
This is a combination of an anion and a cation to form a neutral compound.

6 0

3 years ago

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The coldest temperature ever recorded on Earth was -128.6Â°F (recorded at Vostok Station, Antarctica, on July 21, 1983). Express

Sever21 [200]

Answer : The correct option is, $-89.2^oF\text{ and }183.9K$

Explanation :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=(^oF-32)\times \frac{5}{9}$

where,

$^oF$ = temperature in Fahrenheit

$^oC$ = temperature in centigrade

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=273.15+^oC$

where,

$K$ = temperature in Kelvin

$^oC$ = temperature in centigrade

As we are given the temperature in Fahrenheit is, -10

Now we have to determine the temperature in degree Celsius.

$^oC=(^oF-32)\times \frac{5}{9}$

$^oC=(-128.6^oF-32)\times \frac{5}{9}$

$^oC=-89.2$

Now we have to determine the temperature in Kelvin.

$K=273.15+^oC$

$K=273.15+(-89.2^oC)$

$K=183.9$

Therefore, the temperature in degree Celsius and Kelvin are, $-89.2^oF\text{ and }183.9K$

7 0

3 years ago

Please help out thanks

ra1l [238]

Answer:

Granite

Explanation:

The specific heat capacity of a substance, which is denoted by "c", is the amount of heat required to raise the temperature of a particular mass of that substance by 1°C. It is calculated as follows:

c = Q ÷ m∆T

Where;

c = specific heat capacity

Q = amount of heat (J)

m = mass of substance

∆T = change in temperature.

According to this equation and explanation above, a low specific heat capacity means that the rate at which the temperature is raised is slow and vice versa. Hence, from this question, GRANITE with specific capacity of 0.790 J/gK will raise temperature the slowest.

3 0

3 years ago

It takes 42.25 ml of 0.0500 M Na2S2O3 solution to completely react with the iodine present in a 150.0 ml iodine solution. How ma

svlad2 [7]

Answer:

There were 0.268 grams I2 present

Explanation:

Step 1: Data given

Volume of Na2SO3 = 42.25 mL = 0.04225 L

Molarity of Na2SO3 = 0.0500 M

Volume of iodine = 150.0 mL

Step 2: The balanced equation

I2 + 2 Na2SO3 → Na2S2O6 + 2 NaI

Step 3: Calculate moles of Na2SO3

Moles Na2SO3 = molarity * volume

Moles Na2SO3 = 0.0500 M * 0.04225 L

Moles Na2SO3 = 0.0021125 moles

Step 4: Calculate moles I2

For 1 mol I2 we need 2 moles Na2SO3

For 0.0021125 moles Na2SO3 we have 0.00105625

Step 5: Calculate mass of I2

Mass I2 = moles * molar mass

Mass I2 = 0.00105625 * 253.8 g/mol

Mass I2 = 0.268 grams

There were 0.268 grams I2 present

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4 years ago

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In which of these systems is the entropy decreasing?

atroni [7]

I think it is aaaaaaaa I think it's aaa

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4 years ago

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