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3 years ago

An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?

Chemistry

2 answers:

elena55 [62]3 years ago

5 0

Answer:

cooled quickly

Explanation:

i got right on test

pls mark brainlest for real

skelet666 [1.2K]3 years ago

3 0

Answer:

C,D.

Explanation:

Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth's surface. These are the rocks that form at erupting volcanoes and oozing fissures.

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The main function of a producer in an ecosystem is

jok3333 [9.3K]

Answer:

A producer is a plant or fungi but it mainly is a organism that produces food for a primary consumer

Explanation:

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3 years ago

____________ properties include melting point, boiling point, strength, and malleability.a.physicalc.chemicalb.reactived.none of

lina2011 [118]

Physical properties are those which can be observed without any change in composition of the substance. Hence, a is the answer.

8 0

4 years ago

The half-life of a radioactive isotope is the amount of time it takes for a quantity of that isotope to decay to one half of its

Sedaia [141]

Radio active decay reactions follow first order rate kinetics.

a) The half life and decay constant for radio active decay reactions are related by the equation:

$t_{\frac{1}{2}} =$ $\frac{ln 2}{k}$

$t_{\frac{1}{2}} = \frac{0.693}{k}$

Where k is the decay constant

b) Finding out the decay constant for the decay of C-14 isotope:

$Decay constant (k) = \frac{0.693}{t_{\frac{1}{2}}}$

$k = \frac{0.693}{5230 years}$

$k = 1.325 * 10^{-4} yr^{-1}$

c) Finding the age of the sample :

35 % of the radiocarbon is present currently.

The first order rate equation is,

$[A] = [A_{0}]e^{-kt}$

$\frac{[A]}{[A_{0}]} = e^{-kt}$

$\frac{35}{100} = e^{-(1.325 *10^{-4})t}$

$ln(0.35) = -(1.325 *10^{-4})(t)$

t = 7923 years

Therefore, age of the sample is 7923 years.

3 0

3 years ago

Molecules in 2 moles of carbon dioxide

Maksim231197 [3]

Answer:

HAVE A NICE DAY OK

I GOT UR ANSWER

5 0

3 years ago

Can someone help please? :)

Leno4ka [110]

1) This is a definition.

2) Protons are given by the bottom number (since atomic number = number of protons).

3) Neutrons = (mass number)-(atomic number), which are the top and bottom numbers, respectively.

4) Nuclear fusion involves combining two things together, which is only reflected by the last option.

5) This is a fact.

6) This is a fact.

7) This is a fact.

8) This is a fact.

9) The correct option is the explanation.

7 0

2 years ago